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January 2013  
 

January 2013 U.S. Weather Summary The New Year began with more than 60% of the contiguous states having snow cover which slowly retreated during the first week of January. With the widespread snow cover, Arctic air made inroads across the Northeast dropping temperatures below zero from western Pennsylvania to Maine on the morning of the 3rd. Meanwhile, in the summer hemisphere, a blistering heat wave in southeast Australia caused contributed to devastating brush fires in Tasmania. Readings topped 108 at Hobart and 107 in Sydney. A winter storm brought several inches of wet snow to the western panhandle and Big Bend region of Texas on January 4th. Yet another southern branch disturbance dropped more snow in the same area on the 9th. This same storm triggered thunderstorms along the western Gulf Coast and the first three twisters of the year in Louisiana before lifting northward into the Plains. Some of the rain lessened the need for releases of new water on the lower Mississippi River which was at historic low levels. Meanwhile, a powerful tropical cyclone brushed the northwest coast of Australia before weakening and moving inland on the 12th and a push of polar air combined with a rich supply of moisture to produce the heaviest snowfall in Jerusalem since 1992. Meanwhile, a surge of record chill set dozens of record lows in the Southwest during the second weekend of January. This bitter cold air damaged the citrus crop in southern California and brought readings as low as -36F in the high valleys of central Colorado. A powerful disturbance over Texas, after causing more flooding in Louisiana, then brought a swath of wet snow across the central Gulf states and more than a foot of snow to the south-central Appalachians on the 17th. Meanwhile, a bout of wintry weather overtook northwest Europe snarling traffic in the UK with many flights cancelled out of London during the weekend of Jan 19-20. The icy chill invaded France and the Low Countries and frigid conditions were also noted in northeast China. The coldest air mass in several years oozed southward from Canada into the Midwest and Northeast causing heavy lake effect snow squalls that crippled Erie for more than a day. At the same time, warmth returned to the Rockies as readings rose to record levels in several cities on the 24th. A fast-moving disturbance brought a wintry covering of 2-5 inches to parts of southeast Virginia and northern North Carolina on the 25th. The pattern then shifted to allow heavy showers to reach the Southwest forcing the emergency evacuation of several dozen hikers near Tucson due to flash flooding. In the other hemisphere, a bout of heavy rain caused massive flooding in southern Queensland and northern New South Wales – this coming just after extreme heat and fires had scorched the region. A powerful tropical cyclone turned sharply south toward Madagascar at the month’s end. January concluded with a powerful cold front triggering numerous straight line wind damage across the Mississippi and Ohio Valleys and the first tornado fatility in 6 months. Record warmth preceded the front in the East. Overall, the first month of 2013 was mild east of the Rockies and frigid in the Great Basin. January was rather wet from Texas to the central Great Lakes and quite dry in the Far West and Southeast.

 
The following show the temperature and precipitation departures from normal across the nation during January 2013:
Temperatures Precipitation
   
   
February 2013  
 

The second month opened with predictions of an early spring (for only the 16th time) from Punxsutawney Phil on February 2nd. However, the atmosphere had different thoughts, at least for the Northeast coast where a blizzard struck on the 8th-9th. The area from central New Jersey to northern Maine received more than 6 inches of snow and a maximum of 40 inches was tallied in central Connecticut. Portland, Maine had its largest single day snowfall with just shy of 32 inches. Needless to say, traffic in all forms snarled to a halt and it took a few days to dig out. Meanwhile, a fast-moving storm in the Mississippi Valley spread heavy snow from Nebraska to Minnesota and spawned a powerful twister that ravaged Hattiesburg, Mississippi on the 10th. The same disturbance spread an icy mixture in the Northeast on the 11th. Another fast-moving storm dumped a swath of heavy wet snow from the Texas panhandle to central Pennsylvania on the 13th. A push of polar air into the nation was preceded by a band of snow in the Ohio Valley and eventually along the New England coast which raised the snow tally to over 32 inches so far in February at Boston. In the wake of the storm, there was a smattering of record minimum in the Deep South. Another disturbance brought back bitter air to the northern Plains and an outbreak of severe weather, mainly hail damage, to the lower Mississippi Valley on the 18th. The next is a series of disturbances from the eastern Pacific spun up large winter storm in the Plains that brought travel to a halt in the central Plains and mid-Mississippi Valley. The largest snowstorm in 20 years descended on eastern Kansas and Missouri on the 21st. Meanwhile, a slow-moving, but powerful disturbance in the eastern Mediterranean caused the worst flooding around Athens, Greece in nearly 50 years on the 22nd. For the third consecutive weekend, heavy snow fell in eastern New England with more than ten inches at Concord and Portland. At the same time, a powerful storm in the southwest Plains brought between 6 and 12 inches of snow to Denver on the 24th and then turned into a raging blizzard from the Texas panhandle to eastern Kansas on the 25th. As the storm migrated to the Northeast, a sloppy wintry mixture fell in the central and northern Appalachians. As February concluded, clouds covered much of the northern and eastern two-thirds of the country. February 2013 had numerous wide swings in temperatures from coast to coast, but when the month ended, the tally showed cooler than average weather in the Southwest and upper Midwest and slightly cooler than average in the Ohio Valley, Appalachians and mid-Atlantic region. It was rather mild along the Gulf Coast, in Texas and the northern Rockies and in northern New England. Precipitation was piecemeal with much needed rain in the eastern Gulf States and Southeast and a generally moist pattern from the Texas panhandle to the central Great Lakes. Parts of eastern New England were wet, but a large portion of the upper Tennessee and Ohio Valleys as well as the central Appalachians were dry as was most of Texas and the area west of the continental divide.

 
The following show the temperature and precipitation departures from normal across the nation during February 2013:
Temperatures Precipitation
   
   
March 2013  
 
 

The third month of the year began chilly, though lamb-like with little storminess. But it was not long until a potent disturbance drove southeastward from the Dakotas to the Virginia capes spreading a blanket of 5-10 inches of snow from near Fargo to west of Washington DC. Parts of northern Virginia tallied 20 inches of wet snow. A second disturbance then merged with the coastal storm to produce another swath of heavy snow from Long Island to southern Maine. The suburbs of Boston measured more than 20 inches and wind and waves along the coast caused more erosion. A moist disturbance coming inland in southern California brought snow to the southern and eastern Rockies and then a swath of heavy wet snow from Nebraska to upper Michigan. A band of thundershowers drenched the deep South and triggered severe weather in the southern Plains on March 10-11th. On the other side of the Atlantic, cold and moist weather overtook much of northwest Europe with snow in parts of France and the Low Countries and gales along the Irish coast. Paris had its largest snowfall in twenty years. Chilly weather settled into the eastern half of the nation with a handful of record lows in Texas on the 12th. But heat swelled into the Southwest as Thermal, California reached 100F for the first such reading in 2013 in the contiguous states. As very mild, dry weather surged into the high Plains and the upper Piedmont plateau, a number of brush fires spun up causing serious damage near Fort Collins and Columbia during St. Patrick’s Day weekend. A large, but sluggish storm brought heavy snow to the upper Midwest and another swath of 3-6 inches of snow from central Pennsylvania to central New England. This was followed by very cold conditions with a swatch of record minimum. Meanwhile, on the other side of the Atlantic, a bruising blizzard buried much of northern Ireland and central England with gales on the coast and several meter deep drifts in the hill country. Even the cliffs of Dover suffered as did the dikes of the Netherlands. A powerful early spring snowstorm dropped more than 10 inches of snow from Denver to central Virginia, including the biggest March storm on record in St. Louis. Surprisingly in the last week of the month, 48% of the contiguous states were snow covered compared to 7% last March. A large swath of chilly, cloudy conditions lingered across the Midwest and Northeast during the final work week of March. The month concluded with a brief mild spell in the East that was accompanied by dense fog leading to a 100 car pile up in the southern Virginia Mountains. There were less than 20 twisters reported this month. March 2013 was very cold in the upper Mississippi Valley and chilly from the central Plains to the East Coast with the exception of northern New England. It was quite warm in the Southwest. Most of the nation was drier than usual with the southern Plains being the driest region. Only parts of the upper Mississippi and Ohio Valley were wetter than average.

 
The following show the temperature and precipitation departures from normal across the nation during March 2013:
Temperatures Precipitation
   
   
April 2013  
 

Very cold weather dominated the eastern half of the country during the first few days of April while a final powerful disturbance in the southern branch of the jet stream brought a variety of inclement weather to the Deep South. Severe thunderstorms pummeled coastal Texas with baseball sized hail leading to severe property damage south of Houston. Flooding rains inundated the Gulf Coast and swatches of ice and snow were noted in the panhandles of Texas and Oklahoma as well as the southern Appalachians. The bitter cold weather finally relaxed in the Northeast during the first weekend of the month. A large spring storm gathered steam in the Rockies on April 8th, laid down a blanket of heavy snow from the central Rockies to the northwest Plains, including 20” on Rapid City, and produced a swath of severe weather in the eastern Plains and mid-Mississippi Valley on the 10th. The first severe storms of the season raked across much of Pennsylvania with hail and high winds too. Another wintery storm descended on the northern Plains during the middle weekend of the month dumping a record 15.8 inches of snow on Bismark and causing white-out conditions across much of North Dakota. Meanwhile a separate, but tandem disturbance brought flooding rains to the Gulf Coast. The first half of the month brought several hundred record minimum as chilly air held sway across the northern tier. Another disturbance raced northeast from the Rockies just after mid-month dumping heavy snow from northern Colorado to Minnesota. An outbreak of severe thunderstorms triggered wind damage in the Ohio and Tennessee Valleys and also brought repetitive storms to the Chicago area resulting in more than 5 inches of rain on April 17th. As the front moved to the Atlantic Seaboard, a squall line developed on Friday evening which caused disruption to air travel. Yet another snowstorm blanketed the high plains and eastern Dakotas on April 22-23 dropping at least a half of a foot of snow around the Twin Cities and raising the tally at Duluth to make April 2013 its snowiest month. Frigid weather in its wake brought the first record min in Minneapolis in almost 7 years and a slew of new record lows in the West. Fargo, ND finally topped 50F on April 26th for its latest occurrence on record and the floodwaters steadily rose along the Red River of the North. The weather calmed down for the final few days of April as temperatures returned to near seasonal levels. April 2013 was one of the chilliest on record in the northern Plains as temperatures averaged more than a dozen degrees below normal. It was a cool month from western New England to central Texas and as far west as the Great Basin. Only Florida and California averaged noticeably milder than normal. Pennsylvania was slightly milder than normal. April was a wet month in much of the Mississippi Valley , Great Lanes and parts of the eastern Plains. It was a dry month in the southwest Plains, most of the Southwest and from the eastern Ohio Valley to New England.

 
The following show the temperature and precipitation departures from normal across the nation during April 2013:
Temperatures Precipitation
   
   
May 2013  
 

The fifth month of the year began with bluster as a late season snowstorm descended on the high Plains and upper Mississippi Valley leaving more than a half foot of snow between Cheyenne and Denver and dropping snow on Minneapolis and an amazing 15” on Rochester, MN, their fourth largest snowstorm ever. Meanwhile, a large disturbance over Saudi Arabia was triggering heavy thunderstorms with hail and flooding in parts of the kingdom. The Deep South endured a bout of cool, wet weather during the first five days of the month as more than 8 inches fell on parts of Georgia and the Carolinas, resulting in flooding in the Smokeys. The latest snowfall on record occurred in Arkansas during the first weekend of May and more than four dozen new all-time record lows for May were established during the first week of the month from the Rockies to the Gulf States. The first rains of May overspread Pennsylvania on the 8th ending a 10 day dry spell. Meanwhile, flooding rains and gales swept across western Australia as the winter wet season started with a bang. A push of polar air dropped the temperature below freezing across much of the interior Northeast and Great Lakes region on May 14th, the same day that a surge of record heat moved across the upper Plains sending readings to 106 in Sioux City, Iowa and to 108 in nearby Nebraska. Meanwhile, tropical cyclone Mahasen descended on Bangladesh with 75 mile an hour winds. Right on cue, the eastern Pacific tropical storm season commenced with Alvin forming well south of Baja on May 15th. On the same day, a small, but intense disturbance in north Texas spawned a dozen twisters that resulted in more fatalities in one day (that is 6) than had occurred in the previous 12 months. The weekend of May 18-19 brought more than 50 twisters to the central Plains, including a series of storms that struck populated sections of central Oklahoma. Meanwhile, persistent heavy rain in North Dakota of order of 4 inches brought streams and rivers over their banks. Then on May 20th, an estimated EF5 tornado plowed through Moore, Oklahoma leveling most everything in its 17 mile long, one mild wide path. Two elementary schools with students still in classes were destroyed. The death toll stood at two dozen with nearly 250 injured as another round of severe storms took aim at Missouri on the 21st, but this was more tame than expected. As the Memorial Day weekend arrived, so did a discharge of unseasonably cold air into the Northeast resulting in record late snowfall in the mountains of New England. Whiteface in New York tallied more than 2 feet of snow and the higher elevations of interior Maine, New Hampshire and the Green Mts of Vermont also measured more than a half foot of snow. A warm, moist return flow into Texas combined with a jet stream disturbance to trigger slow-moving thunderstorms which produced flash flooding around San Antonio as more than nine inches of rain accumulated in a few hours on May 26th. The return of sultry air back into the upper Plains, mid-west and Northeast caused spotty severe weather as the first tornadoes of the year touched down near Erie County, Pennsylvania on the 28th resulting in several injuries. The month concluded with another potent disturbance bringing heavy rain to parts of the western high plains capping one of the wettest Mays on record in the north central states. Overall, May 2013 produced an odd thermal anomaly pattern with warmth rimming the central and eastern Great Lakes as well as the northern Rockies and the west coast states. It was coolest in the upper Mississippi Valley as well as the Gulf States and Southeast. As mentioned, it was rather wet in the upper Mississippi and Missouri valleys as well as the interior Southeast and much of northern New England. It was quite dry from the Ohio Valley to the mid-Atlantic states as well as from the southwest Plains to California including most of the Great Basin.

 
The following show the temperature and precipitation departures from normal across the nation during May 2013:
Temperatures Precipitation
   
June 2013  
 

The month began with more tragic news from a late evening outbreak of twisters that swept through the Oklahoma City region. Another 10 people lost their lives including an entire veteran chase team. Meanwhile, in Europe, an historic flood overwhelmed large sections of Austria, the Czech Republic and southern Germany forcing tens of thousands from their homes. A surge of heat in California’s central valley exacerbated a large fire near the southern end of the San Joaquin valley. At the same time, a potent, but small disturbance in Montana and North Dakota was producing serious flooding a tropical disturbance sprung to life in the southeast Gulf of Mexico and was christened Andrea on June 5th in the southeast Gulf. The storm made a bee-line to the Big Bend in Florida and came ashore on the evening of June 6 with 60mph winds. About a dozen tornadoes were spawned as Andrea accelerated northeast along the Atlantic Coast. Most of its effects were flooding rains with more than 3 inches inundating the region from Virginia to eastern Maine. Flash flooding snarled traffic in the urban areas of the Northeast. Another round of rain on the 10th turned the US Open in Merion into soggy fields. A long heralded mesoscale complex of thunderstorms erupted late on the 12th near Chicago and caused over 200 wind and hail damage reports as well as a dozen small twisters. The next day, another 200 plus reports of wind damage were noted in the mid-Atlantic region. A surge of record heat aggravated a large forest fire north of Colorado Springs, but a smattering of thunderstorms helped to combat the fires. Heat surged into Alaska with all-time records set at Valdez near Anchorage. The second named storm of the season, Barry, formed in the Bay of Campeche and moved inland south of Vera Cruz on June 20th. The first few days of summer brought a series of strong thunderstorms, including a derecho, from Iowa to Indiana. Another batch of potent thunderstorms erupted near Calgary, Alberta causing extensive damage and a host of fatalities. The world famous rodeo facility was severely flooded. As the month came to a close, a series of thunderstorms in Pennsylvania produced a variety of effects from a small tornado to wind and hail damage. As June ended, the desert Southwest was on the cusp of an historic heat wave as readings rose to near 120F in Phoenix and Las Vegas and approached 130F at Death Valley. Overall, June 2013 was warmer than average from California to Florida with the largest departures in New Mexico and Colorado. It was cooler than normal from the interior Northwest to the western Great Lakes and in parts of New England and the Southeast. June was very dry in the Southwest, Great Basin and eastern Rockies. It was a very wet month from the Appalachians to the East Coast in parts of the Ohio and upper Mississippi Valleys.

 
The following show the temperature and precipitation departures from normal across the nation during June 2013:
Temperatures Precipitation
   
   
July 2013  
 

The first full month of summer began with a blistering heat wave spreading from the deserts of the Southwest to the inland Northwest. Boise, ID topped 110F (43.5C) just a degree shy of their all-time maximum. Meanwhile, an old front stalled along the East Coast was slowly nudged westward by a building Bermuda High. The result was repetitive heavy showers from the interior Southeast to the Ohio Valley and some sections of the southern Appalachians received between five and ten inches of rain. The tropics sprung to life on July 7 as Chantal was christened in the Atlantic and made a bee-line through the Leeward Islands toward Hispaniola. A cluster of severe thunderstorms caused widespread urban flooding with nearly 5 inches of rain (the most on record) along with numerous power outages in Toronto on July 8th. On the other side of the globe, severe flooding caused devastation in the Szechuan region of China. A slow moving cold front brought flash flooding and even a tornado to the Pittsburgh area on July 10th. The front lingered over the mid-Atlantic region causing flooding in southern Virginia. Meanwhile, a weakening typhoon struck Taiwan on July 12th and proceeded into China. A fast-moving disturbance pushed southwest toward Texas on July 15th with a convoluted frontal system. A heat wave enveloped much of the eastern two-thirds of the country during the middle of July sending readings into the 90’s from the Rockies to New England. As the heat wave subsided, a new round of flooding rains speckled the country from Southwest to the East Coast during the final week of the month. Philadelphia airport was deluged with an all-time record 8.02 inches of the 28th. The Tropics gave birth to Dorian in the Atlantic and Flossie in the eastern Pacific, which skirted across the northern part of the Big Island. As July concluded, a heat wave was baking the Balkan states. July 2013 was cooler than average in the South and much of the Plains and central Mississippi Valley. It was quite warm across the Rockies and Pacific States as well as the entire Northeast and Mid-Atlantic region. It was wettest in the Southeast and oddly the Southwest. Dry weather dominated the Mississippi Valley and northern Plains as well as the Pacific Northwest.

 
The following show the temperature and precipitation departures from normal across the nation during July 2013:
Temperatures Precipitation
   
   
August 2013  
 

The month began rather tranquil in North America, but a brief, intense heat wave was overtaking western Europe. Meanwhile, the remnants of tropical storm Dorian sprung back to life over the Gulf Stream before being absorbed into an offshore front. A cluster of thunderstorms triggered severe weather in the western Plains with hail and tornadoes in parts of Colorado and Kansas during the first weekend of the month. The first week of August brought rather cool conditions to the nation with dozens of record low maximum and minimums. Repetitive thunderstorms in the central Plains and mid-Mississippi Valley dropped between 5 and 20 inches of rain over parts of Kansas and Missouri leading to serious flooding in the heartland and on the tail end of the disturbance, a flash flood tore through the town at the base of Pikes Peak. Meanwhile, parched and torrid conditions across interior southern California led to a destructive Silver Fire that burned through parts of San Bernardino County. At mid-month, the Tropics came alive with Erin formed and dissipated in the eastern Atlantic as a tropical disturbance impaled itself on the Yucatan peninsula. Meanwhile, record chill invaded the Great Lakes and Northeast as a large high from Canada settled over the region and it circulated rather cool, moist air into the Southeast. A surge of heat reached from the northern Rockies to the upper Plains just after mid-month as forest fires were slowly contained in Idaho. Another fire was ignited near Yosemite and threatened the power and water supplies that feed San Francisco late in the month. Tropical storm Fernand formed and dissipated within a day near Vera Cruz in southern Mexico. Meanwhile, the remnants of Tropical Ivo in the eastern Pacific contributed to flash flooding in the desert Southwest. The month concluded with heat persisting over the high Plains and eastern Rockies which caused some school and sport cancellations due to excessive heat. August 2013 was notably cool from the east-central Plains to the Atlantic Seaboard, including New England, but not Florida. It was warm in Texas and the central and northwest Rockies, but cool in the Southwest. Rainfall was above normal in the Sierra and Cascades as well as the mountains of the Southwest. It was moist in a swath from the western Dakotas to the Ozarks and then into the Southeast. The southern Plains, Great Basin, lower and upper Mississippi Valley and portions of the interior Northeast were rather dry.

 
The following show the temperature and precipitation departures from normal across the nation during August 2013:
Temperatures Precipitation
   
   
September 2013  
 

As the ninth month began, eyes turned to the Tropics where the wait continued for the first Atlantic hurricane in a much heralded active season. A cold front pushed to the Atlantic seaboard late on Labor Day ending a spell of rather sultry weather in the East with severe weather concentrated in New York. The first hurricane of the season was finally born in the far eastern Atlantic on September 11th. Humberto tied the modern era late start that occurred in 2002 with Gustav and at the same time, Gabrielle was reborn as a tropical storm as it took a swipe at Bermuda and later took aim at Nova Scotia before being absorbed into a front. Meanwhile, a persistent flow of moist air into the Southwest and Great Basin triggered flash flooding in parts of Utah and Colorado. The Boulder area was particularly hard hit with widespread devastation in the hills just above the city. This was one of the worst floods in this area in several decades as more than half dozen lives were lost and damage estimates were in the billions of dollars. A new tropical storm, Ingrid, formed in the Bay of Campeche and wandered toward the Mexican Gulf coast strengthening to hurricane status when it moved inland north of Tampico on September 16th. Meanwhile, hurricane Manuel buffeted the west coast of Mexico at the same time and brought Acapulco to a halt with serious flooding. This was the first time since 1958 that dual storms affected Mexico simultaneously. A push of cool air into the Northeast brought the first record minimum in more than 6 years to Boston on September 18 as the mercury tumbled to 44 and Martha’s Vineyard fell to freezing. The Atlantic remained eerily quiet especially in light of a predicted active season. Super typhoon Ugasi took aim at Hong Kong as summer came to a close and brought gales and flooding rains as it moved north of the city. A quiescent weather pattern settled over the nation during the final ten days of the month, though it did turn wet and windy in the Pacific Northwest. September 2013 was warmer than average across much of the country from the Pacific Northwest to the interior Southeast. Only a swath from Michigan to Maine and south to Virginia was cooler than normal as well as a few pockets in the Southwest. Rainfall was far above normal in the western third of the country from the Rockies to the Northwest Coast. Only a portion of southern California stayed dry. It was also moist in a swat from south Texas to the lower Ohio Valley and in upper New England. Dry weather dominated the country from the Plains to the Eastern Seaboard.

 
The following show the temperature and precipitation departures from normal across the nation during September 2013:
Temperatures Precipitation
   
October 2013  
 

The atmosphere threw off its early autumn slumber as Tropical Storm Karen sprung to life in the eastern Gulf of Mexico and a fierce early winter storm took aim at the eastern Rockies and northern high Plains. Karen tracked slowly north and then turned northeast before dissipating as it reached the Florida panhandle. The first widespread snow of the early fall covered the Front Range from the Palmer Divide in Colorado to the Black Hills. It was an historic snowfall in western South Dakota as Rapid City tallied an all-time October record of 23” and Lead measured 58”. All ground transportation came to a halt for a couple of days and thousands of cattle perished in the blizzard. Severe storms pelted the eastern Plains with an EF4 twister ravaging Wayne, Nebraska. Meanwhile, the east coast of China took a one-two wallop as a pair of super typhoons barreled inland a few hundred miles south of Shanghai. After several days of record warmth, a sharp cold front triggered a bout of severe storms in the Northeast on October 6-7. The remnants of Karen connected with a large, weak upper level disturbance to bring torrential rains to the Susquehanna Valley on the 11th. Flooding was restricted to the prone areas since it had been rather dry. On the other side of the world, intense tropical cyclone Phailin made landfall along the central east coast of India on the 12th, but the evacuation of more than a million people helped preserve many lives. A few days later, a powerful typhoon named Wipha struck the east coast of Japan causing serious flooding. Rather chilly air settled into the West setting a handful of new record minima at mid-month. The first lake effect snows occurred in upper Michigan during the third weekend of the month with several inches falling and a few days later snow showers dotted Pennsylvania. At the same time, the Atlantic came to life for a few days with weak tropical storm Lorenzo forming well east of Bermuda. As the month concluded, heavy rain caused serious flooding from east Texas to southern Arkansas. October 2013 averaged cooler than normal from the West Coast to the central Plains with the chilliest reading in the northern Rockies. It was mildest in the Northeast. As is typical, October was a dry month for much of the country. It was moist in the northern Rockies and Dakotas and there was a thin corridor of wet weather from Texas to the eastern Great Lakes in the Chesapeake watershed.

 
The following show the temperature and precipitation departures from normal across the nation during October 2013:
Temperatures Precipitation
   
   
November 2013  
 

The month began rather settled with plenty of Pacific air flooding the nation. However, a large high pressure system with barometer readings above 30.70 inches settled over the Northeast with chilly mornings. The remnants of Pacific tropical storm Sonia added to the rainfall along a front crossing the Mississippi Valley. Meanwhile, super-typhoon Hayian roared across the central Philippines on the 7th with winds over 170 mph. The devastation was particularly awful as a tidal surge inundated the city of Tacloban and several thousand lives were lost. The diminished storm then made a second landfall in northern Vietnam a few days later. The first Arctic outbreak of the season descended on the upper Midwest on the 11th with subzero readings near the Canadian border and a skiff of snow southeast of the Great Lakes. Record minima were common in the Deep South. A rapid return to milder conditions took place at mid-month as did a quickly developing storm which spawned several dozen tornadoes in the Midwest on the 17th. Two of the storms were ranked as EF4 in Illinois. A handful of fatalities occurred as the severe storms swept east from Illinois. Meanwhile, the Atlantic came to life for one last time as Melissa formed well east of Bermuda on the 18th and moved steadily north into the colder waters. A push of polar air steadily covered the eastern two-thirds of the country during the final full weekend of the month causing the first November sub-freezing day in New York City since 1976. Heavy snow coated the southern Rockies, especially parts of New Mexico with an icy rain in parts of Texas and Oklahoma. The Thanksgiving travel was disrupted in the southern and eastern half of the nation by the large swath of heavy rain and a narrow corridor of heavy snow in the western Appalachians. The western half of Pennsylvania had a few inches to nearly a foot of new snow. The month ended on a quiet note for much of the nation. November 2013 was chillier than average in the eastern two-thirds of the nation with the coolest weather centered over the Gulf States. It was mildest in the Far West. Precipitation was somewhat sparse across the country, with a few swaths received above average rains from the Southwest to western high Plains and around the eastern Great Lakes and in south Texas and Florida.

 
The following show the temperature and precipitation departures from normal across the nation during November 2013:
Temperatures Precipitation
   
   
December 2013 Weather Summary  
 

The final month of 2013 started frigid and stayed that way for a few weeks. In fact the first third of December saw readings averaging more than 15 degrees below normal from the Dakotas to central Oregon. Minimums reached as low as -40F in Montana and Denver had its coldest 5 day stretch since 1983 in December. Snow and ice became frequent visitors to the nation with 63% of the country being snow covered on December 9th. Snow squalls buried communities in the lake effect belts of the eastern Great Lakes. A fierce wind storm pounded northern Europe during the first week of the month. A significant winter storm effected the Northeast quarter of the country during the third weekend of December with a swath of half of foot of snow. Meanwhile, frigid air and snow invaded the Middle East with snow in Syria causing greater hardship to the refugees and the first snow in Cairo in decades. A surge of milder, moist air from the Gulf States overspread the eastern half of the country during the fourth weekend of the month. Flooding rains caused some havoc in the lower Mississippi and Ohio Valleys. Crippling ice storm wreaked havoc from Arkansas to the St. Lawrence Valley with Toronto and Burlington especially hard hit. Record warmth in the East set new December monthly records from Georgia to Virginia. Meanwhile, a fierce pre-Christmas storm blasted the northern half of the UK with hurricane force winds. The period leading up to New Year’s brought record warmth to the West Coast and above average readings to much of the rest of the nation. However, another blast of frigid air was poised to sweep across the northern tier at New Years. December 2013 found a see-saw battle between warm and cold air in the Northeast with mild conditions winning from Pennsylvania southward and cold air triumphing across interior New England. The center of chill was in the northern Plains and western Great Lakes where International Falls tallied their second coldest December of record. The valleys of the Great Basin stayed very cold too. Much of the Southeast and mid-Atlantic region remained mild and sections of the Southwest. There were three corridors of moist weather during December. One stretched from the Florida panhandle to New Jersey. A second wet zone was noted from west Texas to western Ohio and a third snowy region was seen from Wyoming and Montana to northern Wisconsin. It was very dry along the Pacific Coast and from New Mexico to Iowa.

 
The following show the temperature and precipitation departures from normal across the nation during December 2013:
Temperatures Precipitation
   
   
January 2014  
 

The New Year began with a large winter storm brewing over the middle of the nation. Bitter chill occupied much of the northern tier states and Canada as a fast-moving disturbance was propelled northeast from the Gulf States. The outcome was a widespread moderate snowfall from the Midwest to the Mid-Atlantic, but an outright blizzard paralyzed sections of southern New England, including Boston. Bitter chill encompassed the Northeast in the wake of the storm. Meanwhile, heat was the story in Rio De Janiero as Brazil planned for the World Cup in July. A surge of Arctic air plunged into the northern Plains and Midwest on January 5th and was preceded by a swath of heavy snow in the mid-Mississippi and Ohio Valleys. The ‘polar vortex’ as it was dubbed by the media brought the chilliest readings to the Midwest and Ohio Valley since 1994. Widespread record minima were set from Minnesota to Mississippi and eastward to the Atlantic Seaboard and daytime maxs stayed below zero from the northern Plains to the eastern Ohio Valley. The warm-up afterward was without a storm and the nation experienced an early January Thaw for nearly 10 days at mid-month with chilly restricted to the border states. Meanwhile, a blistering heat wave struck Melbourne during the Australian Open Tennis Tournament with readings over 110F. Oddly, a warm spell in southern California during its driest year on record led to a brush fire that sent a plume of smoke across the city. During the final ten days of the month, several surges of bitter cold air swept from the tundra of northern Canada to the Midwest and Northeast. The first push of polar air was preceded by a fast-moving snowstorm along the I-95 corridor with 6-12 inches of snow snarling the region from Philadelphia to Boston. As the frigid air made inroads across the Deep South, winter storm warnings were issued in Houston for the first time in 4 years and icy rain snarled traffic in Austin. A lake squall caused white-out conditions in northwest Indiana leading to a massive pile-up on I-94. The final week of the month saw another surge of bitter chill into the Midwest and Ohio Valley. Along the periphery of the polar air mass, a swath of snow and ice coated the region from the eastern Gulf Coast to the Northeast shoreline. In the Deep South, most commerce stopped for a day to let the storm pass and Atlanta had gridlock for a day due to icy roads. As the month concluded, some showers finally invaded California ending a very long dry spell. January 2014 was the coldest nationwide since 1994 with the center of chill over the Great Lakes and upper Mississippi Valley. The chill extended to the Gulf Coast and Atlantic Seaboard, though Maine escaped the prolonged cold. The northwest Plains, Rockies and Pacific States were milder than average. Much of the nation was exceptionally dry, with large parts of the Southwest quarter of the country not having any rain or snow. The region around the Great Lakes and Northeast as well as parts of the northeast Rockies were moist.

 
The following show the temperature and precipitation departures from normal across the nation during January 2014:
Temperatures Precipitation
   
   
February 2014  
 

The month began with the axis of chill tilted toward the West and a corridor of moisture aimed toward the East. A swath of snow fell from north Texas to southern New England just as the Ground Hog predicted 6 more weeks of winter. The storm stymied the departure of Super Bowl fans from the NYC area. Barely had the Northeast cleaned up then another mixed storm descended on the region on the 5th snarling traffic from the Plains to New England. Meanwhile, bitter cold air poured into the Northwest and combined with a Pacific disturbance to produce heavy snow in much of western Oregon and this was followed by a notable ice storm, but it occurred on the second weekend on February. Meanwhile, a rapidly developing cyclone brought the worst blizzard to Tokyo in 45 years. As the second week of February began, a series of disturbances progressed from Texas to the Atlantic Seaboard spreading a variety of wintry precipitation across the Gulf States and coastal Southeast. The main disturbance tracked from the eastern Gulf to the mid-Atlantic coast causing a crippling ice storm in the Southeast and a snarling snow storm in the Northeast. A swath of 6 to 18 inches of snow fell from central North Carolina to New England shutting down transportation at the major eastern hubs. Meanwhile, a series of powerful storms in the UK brought record flooding to sections of England at mid-month with fierce winds at the coast and another snowstorm pummeled eastern Japan just after mid-month. A flow of milder air from the Pacific brought relief to much of the nation just after mid-month, but an icy rainstorm caused havoc on the highways in parts of Pennsylvania and the interior Northeast. Meanwhile, a large fast-moving disturbance triggered the first severe weather outbreak in the middle of the country on February 20th with a dozen twisters touching down in Illinois and a blizzard battering parts of Minnesota. The next day, thunderstorms triggered a handful of twisters east of the Appalachians. As the front settled across Florida, it caused heavy thunderstorms with a tornadic cell bringing the Daytona 500 to a halt. Bitter chill returned to the northern third of the country as the month concluded with readings well below zero at daybreak, but other than for patchy snow showers, the eastern half of the nation remained dry. As February came to a close, a new series of storms from the Pacific promised some drought relief to California and ended a long dry spell in the desert Southwest. February, 2014 was bitter cold from the northern Rockies to the central Great Lakes and middle Plains. Chilly conditions extended to the central and western Gulf coast and east to the mid-Atlantic and most of the Northeast. Even the Northwest was cold. The mildest weather was found in the Great Basin and over Florida. This month culminated a remarkably cold winter, one of the top five chilliest in the upper Midwest. It was a wetter month than January with less extensive dry regions. However, the Southwest remained quite dry as did the southern Plains and a portion of the upper Missouri Valley. It was moist in much of the Pacific Northwest, parts of the northern Rockies and upper Mississippi Valley as well as a stripe across the Mid-Atlantic region.

 
The following show the temperature and precipitation departures from normal across the nation during February 2014:
Temperatures Precipitation
   
   
March 2014  
 
 

The month began with a minor miracle of heavy rain in southern California. The rains were too heavy in some locations leading to mudslides and flooding, but the rainwater did help a bit. Meanwhile, a complex storm spawned by the western disturbance brought icy rain and snow from Texas to the mid-Atlantic region. Heavy snow snarled the region from Baltimore to Raleigh on March 3rd. Bitter chill occupied a large swath of the northern Rockies to the Great Lakes. International Falls tumbled to -33F. The bitter chill lead to the most widespread ice cover on the Great Lakes since the late 1970’s. A number of new March minimum record were set in the northern third of the nation during the first week of the month. However, record warmth continued to dominate the Southwest with readings into the 80’s in southern California. A new storm track from the southern Plains to the eastern Great Lakes during the second week of March produced a swath of heavy snow and even blizzard conditions near the southern and eastern Great Lakes on the 12th. St. Patrick’s Day was greeted by a blanket of white from the central Appalachians to the mid-Atlantic coast as more than 6 inches of snow shutdown the Nation’s Capital. Meanwhile, record warmth persisted along the California coast. There were no equinoctial storms this year as the period from March 18-23 was tranquil and rather dry. However, the intersection of a moist front and a geologic shift lead to one of the worst mudslides in recent history in the Pacific Northwest on the 23rd. Arctic invaded the eastern two-thirds of the country during the final weekend of the month and a powerful disturbance dropped several inches of snow from northern Virginia to eastern New England with a blizzard blasting the Cape, down-east Maine and Nova Scotia. In its wake, subfreezing temperatures were driven into the Deep South on March 26th. As the month came to a close, a series of disturbances brought heavy rain and snow to the northern half of the West Coast and a small, but intense coastal storm brought wet snow to parts of the eastern Great Lakes and northern Appalachians. March 2014 capped a frigid winter in the Midwest and Great Lakes as temperatures averaged more than 10 degrees below normal from Minnesota to Maine. Only south Florida and the area west of the continental divide were mild. California had the largest positive departures. Overall, it was a dry month for much of the country. The Pacific Northwest and northern Rockies were wetter than average, but the Plains, Midwest, Ohio Valley and Mid-Atlantic region were parched. A section of the Gulf Coast was wet.

 
The following show the temperature and precipitation departures from normal across the nation during March 2012:
Temperatures Precipitation
   
   
April 2014  
 

April 2014 U.S. Weather Summary COMING SOON!

 
The following show the temperature and precipitation departures from normal across the nation during April 2014:
Temperatures Precipitation
   
   
May 2014  
 

May 2014 U.S. Weather Summary COMING SOON!

 
The following show the temperature and precipitation departures from normal across the nation during May 2014:
Temperatures Precipitation
   
June 2014  
 

June 2014 U.S. Weather Summary COMING SOON!

 
The following show the temperature and precipitation departures from normal across the nation during June 2014:
Temperatures Precipitation
   
   
July 2014  
 

July 2014 U.S. Weather Summary COMING SOON!

 
The following show the temperature and precipitation departures from normal across the nation during July 2014:
Temperatures Precipitation
   
   
August 2014  
 

August 2014 U.S. Weather Summary COMING SOON!

 
The following show the temperature and precipitation departures from normal across the nation during August 2014:
Temperatures Precipitation
   
   
September 2014  
 

September 2014 U.S. Weather Summary COMING SOON!

 
The following show the temperature and precipitation departures from normal across the nation during September 2014:
Temperatures Precipitation
   
October 2014  
 

October 2014 U.S. Weather Summary COMING SOON!

 
The following show the temperature and precipitation departures from normal across the nation during October 2014:
Temperatures Precipitation
   
   
November 2014  
 

November 2014 U.S. Weather Summary COMING SOON!

 
The following show the temperature and precipitation departures from normal across the nation during November 2014:
Temperatures Precipitation
   
   
December 2014 Weather Summary  
 

COMING SOON DECEMBER 2014 SUMMARY!

 
The following show the temperature and precipitation departures from normal across the nation during December 2014:
Temperatures Precipitation
   
   
   
   
   
 

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