Precipitation
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July 2014 |
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The first full month of summer started with the development of Hurricane Arthur near the Florida Coast and its quick exit east of Cape Cod late on the 4th of July.
Arthur became the first hurricane to strike the U.S. on Independence Day as it passed through the Outer Banks of North Carolina. The storm was preceded by sultry conditions in
the eastern states along with heavy thunderstorms. The eye of Arthur crossed Cedar Inlet at midnight and passed 30 miles west of Cape Hatteras while producing a sustained wind
of 70mph with gusts to 96 at a buoy in Pamlico Sound. The storm rained out holiday plans from Long Island to eastern New England dropping more than 6 inches of rain on New Bedford.
Eventually Arthur sped its way across Nova Scotia on the 5th. The monsoon started with a blast in Phoenix as a large dust storm preceded the first widespread showers on July 3rd.
Meanwhile in the western Pacific, super typhoon Neoguri smashed into Okinawa with wind gusts exceeding 100 miles an hour and then turned northeast. A cluster of powerful
thunderstorms caused widespread wind damage in the Northeast on July 8th with a twister near Binghamton resulting in 4 fatalities. Pennsylvania tallied more than 100 reports of
wind damage from a derecho in the eastern half of the state along with the strongest twister, an EF2, in Sullivan and Bradford counties. On the far side of the continent, a heat wave
overtook British Columbia leading to fires in north central Washington, heavy rains in Juneau led to widespread flooding and large storms caused hail and flooding in southeast Wyoming.
On the other side of the Pacific, powerful typhoon Glenda shutdown metro Manila for a day at mid-month and then intensified again and struck near Hainan, China.
A record cool air mass spread into the upper Plains and Great Lakes as Canada emptied cooler, dry weather into the nation at mid-month. Maximum temperatures were as much as
30 degrees below normal in the southern Plains due to clouds and showers as both Jackson and Memphis notched their chilliest July day of record. The central Pacific came to life
on the 18th as tropical storm Wali formed southeast of Hawaii and threatened the region with squalls and flash flooding. Rare thunderstorms around Los Angeles brought lightning
that killed one man and injured a half dozen at a beach in Venice. Another shot of unseasonably cool weather reached the eastern and southern half of the country during the
final few days of July. Montgomery, AL tied its lowest July reading with 59F. During the last week of the month, the second tropical depression of the Atlantic season formed and
dissipated as it neared the windward islands, then a new disturbance was named Bertha as it crossed the lesser Antilles on August 1st.
July 2014 averaged rather cool from the high plains to the mid-Atlantic coast with the chilliest weather centered over the mid-Mississippi Valley. Parts of south Texas, Florida
and New England were slightly milder than average. The entire West was warmer than normal with the warmest conditions in the interior Northwest. Rainfall was generally
below normal across large sections of the nation. New England was moist and a splotchy zone from Nevada to the mouth of the Mississippi was wetter than average, including
the Rockies. Florida was moist and the driest region was centered in the northern Plains.
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The following show the temperature and
precipitation departures from normal across
the nation during July 2014: |
Temperatures |
Precipitation |
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August 2014 |
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The month began with yet another hurricane being born in the Atlantic. Technically, it took until the 4th for Bertha to reach this
strength as it exited from the eastern Bahamas after cutting a swath across Puerto Rico and the DR. Meanwhile, late summer thunderstorms in California
spawned mudslides in southern sections and triggered fires in the northern Sierra. Also, powerful hurricane Iselle approached the Hawaiian Islands with squally winds
and heavy rains and weakened to tropical storm strength while passing through the Big Island. Meanwhile, hurricane Julio followed on its tail, though weaker
and farther north a few days later. The Northeast was treated to hazy skies for a couple of days as a dense smoke plume from forest fires in northern Canada filtered
into the region. Once again, heat was suppressed east of the Rockies during the second weekend of August. A potent disturbance from the upper Lakes dropped
southeastward on August 12-13 causing flooding in Detroit, Baltimore and eastern Long Island where more than a foot of rain fell in a few hours, an apparent state record.
The middle of August saw the eastern Pacific come alive again with Karina and Lowell forming west of Baja. Monsoon moisture brought a 5 inch plus rainfall to the
Salt River Valley in Arizona. Flooding shut down parts of I-17. A cloudburst caused much devastation around Hiroshima on August 20. A stalled disturbance in the
Northeast triggered a rash of severe thunderstorms in Pennsylvania leading to two tornadoes on the 21st. The Atlantic finally came alive on August 24th with Christobal
being named in the southeast Bahamas. The storm meandered northward and passed well west of Bermuda on the 27th before racing into the North Atlantic and
slamming into Iceland. A surge of hot, humid air reached into the mid-Mississippi Valley and Southeast during the last week of August as very cool air accompanied a
chill rain in Montana. Meanwhile, powerful hurricane Marie sent its large swells into southern California during the final days of the month. August 2014 brought a very
unusual temperature departure pattern with a serpentine region of below normal temperatures from the Southwest into the Dakotas then south into the lower
Mississippi Valley and then eastward from the Carolinas to central New England. Warmth was limited to Pacific Northwest, parts of the southwest Plains and northern Maine.
Rainfall was abundant from the northern Plains to the interior Southwest, including the inland Northwest. Another moist corridor stretched from Nebraska to the
central Appalachians. Dry conditions dominated the Gulf States and southern half of the Plains as well as parts of the Southeast and spotty regions in the Great Lakes
and southern New England.
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The following show the temperature and
precipitation departures from normal across
the nation during August 2014: |
Temperatures |
Precipitation |
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September 2014 |
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As have the previous two months of the summer season, September began with another tropical storm forming this time in the Bay of Campeche. Dolly was named late
on the first and made a beeline for the Mexican coast striking near Tampico on the 3rd. Late summer heat dominated the first few days of the month with readings well into the 90’s east of
the Appalachians. A spate of severe thunderstorms marked a cool front on the 2nd in the mid-Atlantic region. Moisture from weakening hurricane Norbert brought flooding rains to the Southwest.
Phoenix tallied its wettest day ever with over 3 inches in one day. Meanwhile, a very active monsoon brought nearly stationary thunderstorms to the Punjab region between India and Pakistan
resulting in serious flooding. The chilliest air mass of the last summer season spilled from the Arctic into the Canadian prairies and then into the northern Plains and eastern Rockies.
Record early snowfall caused widespread tree damage and power outages from Edmonton to Calgary with the earliest first inch of snow in a swath from eastern Montana to western Nebraska
on the 11th. Widespread minimums in the 30’s were noted in a quarter of the states during the middle weekend of September. Meanwhile, the tropical Atlantic sprung to life with hurricane Edouard
just after the average peak of the season. Edouard strengthened to Category 2 as it turned north in the central Atlantic well east of Bermuda at mid-month. On the other side of the continent, powerful hurricane Odile
struck Cabo San Lucas as a Category 3 storm, the strongest on record to hit Baja, before slowly weakening as it moved north through the Gulf of California. Its heavy rains flooded parts of the
Southwest and then caused flash flooding in sections of west Texas during the final weekend of summer. As the season transitioned so did the warmth in the eastern half of the nation.
During the first few days of autumn, a tranquil though warm weather pattern dominated the High Plains. The first rainstorm of autumn descended on the Pacific Northwest late in the month.
September 2014 was cooler than average over a large section of the northern Plains, upper Mississippi Valley, Great Lakes much of New England. The coolest region was in lower Midwest.
Meanwhile, it was a warm month from the Southeast to Texas and across the West with the largest departures in California. Rainfall was above normal in much of the Southwest and western Texas
as well as from northern Florida to southeast Virginia and in a swath from Kansas to northern Ohio. The Northeast, mid-Atlantic and Tennessee Valley were dry as was the northern Plains and
much of the interior Northwest and California.
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The following show the temperature and
precipitation departures from normal across
the nation during September 2014: |
Temperatures |
Precipitation |
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October 2014 |
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The tenth month began with warmth being pushed off the East Coast as a chilly air mass spread the first flakes of the season into the Midwest.
Meanwhile, the western Pacific had a pair of typhoons that affected Japan with the first, PhanPhon, dropped up to 10 inches of rain on Tokyo and the second, super typhoon
VongFong, took dead aim on Japan again. VongFong pummeled Okinawa with gales for more than two days and more than a foot of rain. Meanwhile, intensifying tropical cyclone
Hudhud struck the central east coast of India at mid-month causing extensive damage and later its moisture triggered a sudden blizzard in Nepal that trapped and killed 27 hikers.
The Atlantic came alive again as subtropical storm Fay took aim at Bermuda and intensified as it passed over the island on the 12th. Another storm, Gonzalo formed near the Leeward
Islands and skirted just north of the Virgin Islands and Puerto Rico on the 14th as it became a major hurricane. A potent disturbance in the middle of the nation at mid-month spawned
about a dozen twisters as it moved slowly eastward. Gonzalo took direct aim at Bermuda and passed across the island nation as a Category 3 storm on the 17th.
This was the second hit in five days. In the central Pacific, hurricane Ana skirted south of the Hawaiian Islands bringing high waves and bands of flooding rain to the western part of the chain.
Meanwhile, it turned very mild in the middle of the country with readings in the 80’s as far north as the Dakotas. A slow moving nor’easter provided much needed rain for southern
New England from October 21-24. A soggy front started the rainy season in the Pacific Northwest during the last weekend of October as late summer warmth surged into the southern Plains.
In the Caribbean, Hanna formed briefly near Honduras and was carried inland. As month ended, a tropical cyclone in the Arabian Sea was headed toward Pakistan and Vance formed in the
eastern Pacific and wandered toward Baja.
October 2014 was a mild month for the nation with only two diminutive cool areas, on in the western Great Lakes and the other in Florida. The warmth was centered over the northern Rockies,
southwest Plains and New England. Rainfall was sparse from California to Minnesota and from New Mexico to the Carolina Coast. It was wet in the Pacific Northwest and from Kansas and Arkansas
to the upper Great Lakes and central Appalachians. Much of New England turned moist too.
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The following show the temperature and
precipitation departures from normal across
the nation during October 2014: |
Temperatures |
Precipitation |
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November 2014 |
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An early taste of winter greeted the Deep South as the month began with 2 feet of snow in the Smokey Mountains and the earliest snow on record on the
South Carolina Piedmont. Record minimums reached to south Florida and freezes were noted to the Gulf Coast. Heavy wet snow covered much of Maine as more than a foot
fell in down-east sections. Caribou tallied its earliest 10”+ snow cover on record. Tropical moisture from dying hurricane Vance soaked the southern Plains. A disturbance on a
cold front dropped more snow in northern New England on the 7th. However, it was the remnants of super-typhoon Nuri that turned into the most intense storm on record in the Bering Sea
and this caused a cascade of frigid air into central North America. The bitter chill was preceded by record warmth in the Plains and South. Snow accompanied the change to wintry conditions
with a couple of feet of snow in Michigan’s Upper Peninsula and a new November record for chill at -26F in Casper, WY only to break the record by a degree the next morning. Denver
dropped to teens below zero and a winter storm invaded in Pacific Northwest with icy roads near the coast and heavy snow farther inland. Another surge of frigid air brought swatches
of snowfall to the nation such that by November 17th, half of the contiguous states were snow-covered, an unprecedentedly early arrival of wintry weather. As the gelid air crossed the
Great Lakes, a prodigious amount of snow fell in the Buffalo suburbs with upwards of 60 inches in just one day. Similar amounts fell around Watertown, NY. Then two days later, another
bout of lake effect snow struck the same region. A fast moving flat disturbance on a stalled front along the Atlantic Seaboard caused widespread travel disruption on one of the busiest
travel days. A swath of heavy wet snow fell from the southern Appalachians to the New England coast with more than a half of foot of snow snarling traffic from western Virginia to the suburbs
of Boston. Power was knocked out for several hundred thousand in New England. Meanwhile, bitter chill dropped the mercury of a record -28F in central North Dakota on Black Friday
and snow squalls raised the tally of November snowfall to a record 64” in northern Michigan. The month concluded with another surge of Arctic air invading the northern and western Plains
as much milder air overtook the eastern states on brisk winds from the southwest.
Overall, November 2014 will be remembered as one of the colder 11th months in recent years. The chilliest conditions were centered in the Plains and Mississippi Valley, but all of the
nation east of the continental divide averaged below normal readings. It was mild from the Cascade to the Coast and in all of California and Arizona. Precipitation averaged below normal
across much of the country. It was moist in the northern and eastern Rockies as well as around the Great Lakes, southwest Plains and much of the Southeast.
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The following show the temperature and
precipitation departures from normal across
the nation during November 2014: |
Temperatures |
Precipitation |
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December 2014 Summary |
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The final month of 2014 began with mild air occupying both California and the East Coast as chillier air was moving into the Midwest. It was not long before a large Pacific storm
began to send record amounts of rain into the West Coast. In fact, San Francisco had more rain in the first three days of December than it had in all of 2013. Flooding was widespread in central
and northern California as well as the mountains of the Southwest. Enough rain fell in Las Vegas that a dense fog settled over the region leading to flight cancellations. As the disturbance traversed
the nation, it brought heavy rain along with some ice along its leading edge. Meanwhile in the western Pacific, a super-typhoon named Ruby raked across the Philippines causing a number of fatalities
and considerable property damage. Back in the states, several disturbances merged near the New England coast to create a large nor’easter which dumped heavy snow from central New York to
northern Maine. A few bands of heavy snow effected northern and central Pennsylvania. The storm stalled for 3 days over the region sending chilly air into the Southeast. A potent disturbance blasted
into northern California on the 11th with hurricane force wind gusts on the coast and flooding rains in the valleys. As the West turned stormy, Pacific air flooded the nation east of the Rockies keeping
minimum temperatures near or above freezing for several days. As polar air returned to the high Plains at mid-month, so did a swath of heavy wet snow. The period leading up to the Christmas holiday
was generally tranquil and seasonably mild with an abundance of clouds from coast to coast. However, a potent disturbance in the Deep South triggered an outbreak of severe storms on the 23rd
causing over a dozen twisters that resulted in 4 fatalities in Mississippi. Heavy rain soaked the Atlantic Seaboard on Christmas Eve as temperatures reached the 50’s as far north as New England.
Christmas morning found about 20% of the nation snow-covered and only a handful of states had readings staying below freezing on Christmas Day. The axis of chilly weather then moved into the
West where snow fell at low elevations in the interior mountain region and the last few days of the year saw an enormous high, centered over the high Plains controlling the weather from coast to coast.
Frigid air covered the northern tier sending to mercury to -31F in Laramie and -19 in Denver as a potent disturbance in the Southwest triggered low elevation snow in the deserts of southern Nevada
and Arizona as the year concluded. Two international disasters were affected by the weather as a fire on a Greek Ferry was caught in gales and rough seas delaying the evacuation of passengers and
weather appeared to be a culprit in the loss of a Malaysian airliner en-route to Singapore.
Overall, December 2014 was quite mild from coast to coast with only one or two spots averaging slightly below normal. The mildest conditions were across the northern third of the country with the
interior Northwest being the warmest. Precipitation during December was generally above normal from the central Plains to the Pacific Coast and below normal from the southwest Plains to the Mississippi
Valley, the Ohio Valley and mid-Atlantic region as well as southern Florida. The wettest area was California for a change and the driest region was Texas.
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The following show the temperature and
precipitation departures from normal across
the nation during December 2014: |
Temperatures |
Precipitation |
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January 2015 Summary |
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The year began with frigid air occupying the Southwest and northern Rockies and this was reinforced by a push of Arctic air a few days later. The deserts of Arizona had measurable
snow and flakes flew in Las Vegas for the first time in a half dozen years. The same disturbance moved across the Deep South and triggered the first severe weather of 2015 with a few
twisters in Alabama and Mississippi. As the sub-zero chill passed across the Great Lakes, intense snow squalls formed which led to several disastrous traffic pile-ups in Michigan and Pennsylvania.
The Michigan squalls caused a more than 100 vehicle accident along I-94. Meanwhile, a series of powerful ocean storms plowed into Norway sending hurricane force gusts across the northern
British Isles and much of western and southern Scandinavia. Oslo was pounded by hurricane force gusts for more than 6 hours on the 12th. Much of the U.S. was tranquil during the second week
of January, though the DelMarVa was hit by an icestorm. Bitter cold air crept southward along the border leading to widespread sub-zero readings from the northern Plains to New England.
Meanwhile in the Indian Ocean, a super tropical cyclone, Bansi, moved away from Madagascar as it stirred up the southern Indian Ocean with nearly 200mph winds. The middle weekend of January
saw freezing rain cripple the roads from eastern Pennsylvania to the valleys of New England as a small, but intense low produced record daily rainfall along the coastal plain on the 18th.
In its wake, Pacific air dominated the nation with only a handful of stations remaining below freezing in the lower 48 states. Meanwhile the southern branch of the jet stream became active with
a significant disturbance producing record snow in Amarillo, Texas and a swath of heavy wet snow along the east slope of the central and northern Appalachians early on the 24th.
Wet snow accumulated several inches from New York City to Boston. Then an historic blizzard descended on the Northeast on the 26-27th with gales and snow accumulations between
1-3 feet from Long Island to Maine. The Boston area was particularly hard hit with near hurricane force wind gusts and more than 20 inches of snow. + Meanwhile, record warmth overspread
the West and northern Rockies with readings in the 60’s and 70’s as far north as the Canadian border. The month concluded with Arctic air seeping back into the northern Plains, a soggy
disturbance moving through the Southwest and a new storm forming the mid-Plains.
January 2015 was chilly east of the Mississippi and in the southern Plains, though Florida and the Southeast Coast was mild. The coldest conditions were across the interior Northeast and south Texas.
It was quite mild from the western Great Lakes across the northern Plains to the Rockies and West Coast. The warmest weather was in Nevada. Precipitation in January was below normal in
most sections with the exception of the mid-Atlantic and New England coast as well as the southern Plains and parts of the Southwest and Montana. Some parts of California and Kansas
had no rain or snow.
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The following show the temperature and
precipitation departures from normal across
the nation during January 2015: |
Temperatures |
Precipitation |
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February 2015 Summary |
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The second month started with a snowstorm brewing in the central Plains and racing to the mid-Atlantic coast where it deepened and turned north into another blizzard for
New England. Chicago had its snowiest day on record in February and second largest snowfall of record. Boston’s 10 inches of snow raised the weekly tally to nearly 45 inches making it the
snowiest 7 days since records began in 1891. Meanwhile, record warmth persisted in California with widespread readings near 70F. Frigid air steadily seeped into the northeastern third of the
nation during the first week of February. Meanwhile, record warmth dominated the western third of the country with three consecutive days above 70F in Denver. A complex storm descending
from the Great Lakes to the Carolina coast brought bands of heavy snow to eastern Massachusetts dumping more than two feet on the Boston area between the 7th and 9th. Then another
clipper from the upper Great Lakes turned into a coastal storm south of Cape Cod on the 14th dropping another 20 inches of snow on the Boston area. In its wake, gale force winds drove
record chill into the Northeast for President’s Day weekend. A fast-moving disturbance on a stalled front contributed to a swath of snow from Texas to New Jersey with an icy rain in parts
of the Gulf States and nearly a foot of snow in Kentucky. The action then shifted to cold weather in the Northeast and Great Lakes as ice coverage on the lakes increased rapidly during the
middle of February reaching 85% by the last week of the month. A westward surge of frigid air produced a swath of snow along the east slopes of the Rockies during the third weekend.
The chill settled into the South as a series of disturbances brought a wintry mix to the interior Gulf States and the Southeast during the last week of the month. Frigid air persisted over the
Northeast as Syracuse tallied its 20th subzero morning, a record for the calendar year. Temperatures dropped to -32F in Westfield, PA on the 24th marking the third time in February of readings
below -30F in the Commonwealth. A winter storm brought snow and ice to the Southeast and mid-Atlantic coast on the 26th halting traffic in this quarter of the country for more than a day.
Overall, February 2015 was one of the coldest on record in the Northeast, surpassing 1979 for chill. Actually, there were at least a half dozen cities from New York State to Maine that
notched their coldest month of all-time. The chill was centered over the Northeast, but below average temperatures were noted from the western Plains to the Atlantic Seaboard.
Warmth dominated the West as Idaho was the epicenter of mild conditions. Precipitation was below average across large sections of the country with only a few swaths of wetter than
average weather. It was moist in the eastern Rockies and in parts of the Tennessee Valley and coastal Southeast. It was another parched winter month in much of California, Texas
and the upper Mississippi Valley.
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The following show the temperature and
precipitation departures from normal across
the nation during February 2015: |
Temperatures |
Precipitation |
March 2015 Summary |
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The third month of 2015 began much like February had ended with bitter chill in the Northeast and sub-zero readings returning to
the northern Plains and Rockies. A new storm track began to be carved out across the country with disturbances bringing notably cooler, moister air
to the West and surges of milder weather into the East. A warm-up in the East was preceded by an icy rain that encased areas so that most transportation
was shut down. Then a trailing disturbance from the southern Plains dropped a swath of 10 inches or more of snow from the Ozarks to the southern New England coast.
This was followed by record chill in much of the Ohio and Tennessee Valleys. Both Harrisburg and Pittsburgh set new March record minimums.
A new weather regime then allowed Pacific air to stream across the nation leading to above freezing readings from coast to coast by March 10.
Much of the snow melted in the mid-Atlantic and Ohio River Valley with no flooding, though Kentucky had accumulated enough snow for meltwater flooding.
Meanwhile, the western Pacific sprung to life with three tropical cyclones nearing Australia and one in the north Pacific approaching Guam.
Bavi brushed by Guam, a rare March storm. Meanwhile, Super-typhoon Pam descended on Vanuatu devastating the island nation of a third of a million people on the 15th.
The capital city had 90% of its buildings damaged or destroyed by winds well over 100 miles an hour. There were at least a dozen casualties before the storm
turned south toward New Zealand. Back in the states, record warmth overspread the Plains during the middle weekend of March with readings nearing 90F in
Nebraska and then into the middle 90’s on the 16th for the highest readings so early in the year and raising an extreme wildfire danger.
A disturbance over northern Mexico had the odd effect of suppressing severe weather in the Gulf States such that by March 23rd, not a single tornado had been
reported this month so far, the latest into March since 1969. As winter came to a close, another fast-moving disturbance dropped between 3 and 6 inches of snow
from the central Appalachians to southern New England on the 20th. Another push of polar air arrived for the first few days of the new season with morning readings
below zero in the valleys of New England. A disturbance in the southern Plains was finally able to trigger severe thunderstorms on March 24-25. In fact, the first twisters of the
month descended on Oklahoma and ravaged Tulsa on the evening of the 25th. The destruction was particularly heavy around parts of the city with much wind damage around Oklahoma City too.
The month closed with another shot of Arctic air into the Great Lakes and Northeast sending the mercury to near zero in rural sections from Michigan to Maine.
Meanwhile, warmth swelled into the middle of country at the month’s end.
March 2015 had an unusual temperature anomaly pattern. Cold weather dominated from Texas northeast across the middle Mississippi Valley and then eastward to the
Mid-Atlantic States and New England. The Great Lakes were also chilly. Warmth was pronounced across the Southeast and over the western half of the nation from the
southern Rockies to the northern Plains. It was coldest in the Northeast and warmest in Florida and California. Precipitation traced a similar pattern at least from Texas to the
Ohio Valley with well above average precipitation, but it was very dry in the Plains, Great Lakes and Northeast as well as much of the Southeast. Most of the West was dry,
except for parts of the interior Southwest and eastern Washington and northern Montana.
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The following show the temperature and
precipitation departures from normal across
the nation during March 2015: |
Temperatures |
Precipitation |
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April 2015 Summary |
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The fourth month of 2015 began with a fresh covering of snow across parts of the Northeast, especially Pennsylvania. A surge of warmth in the Plains and Mississippi Valley brought
readings well into the 80’s as far north as Minnesota on the second. As a front swept through the Ohio Valley, a bout of severe weather was noted and repetitive thunderstorms caused flooding on the
Ohio River in Kentucky on the 4th. A push of polar air into northern New England brought the mercury to near -20F in upper Maine on Eastern morning apparently setting a new state record for April.
During the second week of the month, a series of disturbances that brought much needed rain and snow to California began to trigger a series of severe thunderstorms in the central Plains to the Ohio Valley.
Flooding was particularly severe in Kentucky where baseball sized hail also fell. The strongest tornado of the season descended on a small town in northern Illinois causing a few fatalities on the 9th.
As the third week began, a large disturbance was gathering steam in the Deep South and caused heavy storms from east Texas to the Tennessee Valley. Nearly ten inches of rain fell around Mobile on the 13th.
A push of chilly air along the Front Range of the Rockies resulted in a swath of heavy snow in parts of Wyoming and Colorado on the 16th. The third weekend of April brought very mild weather to much of the
East with readings near 80F as far north as the Great Lakes. A potent disturbance late on the 19th produced widespread hail in the southern Plains and a rash of twisters in the Southeast.
As the low moved into the lower Lakes, it produced a rash of hail across the Northeast and flooding in parts of Pennsylvania. Meanwhile, on the other side of the globe, a slow-moving coastal storm combined
with a large high to produce gales and heavy rain in New South Wales. Also in the southern hemisphere, a massive volcanic eruption took place in central Chile around the same time. Unseasonable chill returned to
the northern Plains with numerous record minimum on the 22nd and 23rd. Snow showers were common in the Northeast as a pool of chilly air settled over the region. A potent disturbance tracked across the
Deep South during the final week of the month triggering several outbreaks of severe storms from Texas to Florida. The month ended on a quiet note, though it was very hot in southern California.
April 2015 was a noticeably milder month for the nation with only New England and parts of the Rockies and interior Northwest being cooler than average. The warmest conditions were in the Southeast,
but readings average well above normal from the high Plains to the mid-Mississippi Valley and into the Carolinas. Rainfall was more abundant with a large section of the country wetter than normal from Texas to the
central Appalachians, including much of the Gulf States and the Ohio Valley. It was also wet in parts of the eastern Rockies. The driest conditions were noted in eastern New England, the Dakotas and Minnesota
as well as much of the Far West.
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The following show the temperature and
precipitation departures from normal across
the nation during April 2015: |
Temperatures |
Precipitation |
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