National Weather Summary May 2007
- From: jamesmunley@xxxxxxxxxxx
- Date: Tue, 12 Jun 2007 17:29:07 -0700
NATIONAL WEATHER SUMMARY
MAY 2007
1st-5th...Severe weather and flash flooding once again pounded the South
Central states Wednesday with a series of upper-level disturbances
overhead. The first disturbance that has recently been the culprit
behind intense weather across the region continued to deliver showers
and thunderstorms from the lower Ohio Valley into eastern Kansas and
Oklahoma. As rain from this unsettled weather attempted to seep into
an already over-saturated soil, more flooding problems resulted.
Numerous severe thunderstorms, including ten tornadoes, battered areas
from southeastern New Mexico to northeastern and central Texas
Wednesday with the arrival of a second disturbance. Some of the most
intense thunderstorms also produced hail larger than the size of golf
balls and wind gusts over 74 mph, the speed of a lower-end category
one hurricane. A frontal boundary that extended away from these
disturbances also ignited thunderstorms across Kentucky into the
Virginias. The thunderstorms were locally severe with damaging winds
and hail. To the south of the front, unseasonably warm air remained
over the Southeast, while an area of high pressure north of the
boundary kept temperatures closer to typical early May values across
the Northeast. Meanwhile, southeast winds howled across the northern
Plains ahead of a large storm that impacted the Western states.
Compared to the recent record warmth that dominated many areas this
weekend, the weather was dramatically different across the West
Wednesday since the storm delivered periods of rain and mountain snow
to the Northwest and northern Great Basin states; gusty thunderstorms
also developed over the northern Rockies in the afternoon. The arrival
of cooler air following the storm's cold front was very noticeable
from the interior Northwest to central California. After warming to a
high of 83 degrees Tuesday, Boise, Idaho, saw a more-seasonable high
of 62 degrees Wednesday. South of the wet weather, strong wind gusts
blasted the Southwest.
A disturbance in the jet stream continued to be the culprit of severe
weather across a part of the nation Friday. Though the disturbance did
not produce as many severe thunderstorms as previous days, locally
strong to severe storms still slammed parts of the Tennessee and
central and lower Mississippi Valleys as the system headed
northeastward. With a front extending from the disturbance to the
Georgia coastline, a severe thunderstorm also produced gusty winds and
hail in the eastern part of the state during the afternoon. In the
wake of the front, cool and moist air poured across the Carolinas and
southern Virginia, making for a significantly cooler day when compared
to the unseasonable warmth the region just recently experienced.
Farther north, a large area of high pressure continued to dominate the
weather across the majority of the Northeast. While the Northeast
enjoyed a pleasant afternoon, the weather deteriorated across the
Plains as a storm began to emerge out of the central Rockies and
severe weather ignited. While the majority of the intense
thunderstorms produced hail, with a couple reports of 3-inch diameter
hailstones, there were at least a dozen sightings of tornadoes from
southeastern South Dakota to eastern Colorado and the western border
of Texas and Oklahoma before midnight EDT. To the west of the severe
weather, rain and mountain snow showers occurred across the central
Rockies. The unsettled weather also extended back to central
California and the Pacific Northwest. Gusty winds whipped across parts
of Southern California.
6th-12th...Across the East, high pressure dominated much of the region.
Skies were sunny with dry conditions over the Northeast, Mid-Atlantic,
Great Lakes, Ohio Valley, and Southeast. Skies were partly cloudy over
Florida as a system moved offshore. A few rain showers developed over
the Outer Banks of North Carolina during the evening. In the central
region, a low pressure system located in the Great Plains produced
showers and thunderstorms from Texas to Illinois. Hail and gusty winds
were reported in Oklahoma, Missouri, and Texas as severe thunderstorms
developed. Flooding was a concern over much of the Plains and Midwest.
Over 3 inches of rain fell in the eastern half of Oklahoma since
midnight. Showers and more isolated thunderstorms were reported over
the Upper Midwest and western Great Lakes. A few scattered showers
were reported in the Dakotas, along with variably cloudy skies. Over
the West, most of the region was partly cloudy to mostly sunny with
dry conditions. A few clouds developed during the day over the Pacific
Northwest and front Range. Afternoon showers and thunderstorms
developed in southern Arizona. Rainfall amounts were light.
In the East on Wednesday, much needed rainfall fell along the
Southeast coastline as Subtropical Storm Andrea slowly moved toward
the coast. Rain showers and a few thunderstorms brought up to half an
inch of rain to the area. Further to the north, a cold front sparked
showers and thunderstorms over the Great Lakes and Ohio Valley.
Locally heavy rainfall amounts were reported. Skies were partly cloudy
to mostly sunny in the Northeast, Appalachians, and Deep South. Over
the central region, a low pressure system continued to produce
isolated showers and thunderstorms in the Lower Missouri River Valley
and the Ozarks. A more widespread complex of showers and thunderstorms
developed in western Texas, then pushed to the east across the
southern Plains. Rainfall amounts over 2 inches were recorded in
Odessa, Texas. Scattered showers and thunderstorms were also reported
over the western Great Lakes. Skies were sunny over the Midwest and
northern half of the Great Plains. In the West, rain showers continued
to fall over eastern New Mexico throughout the day. Rainfall amounts
were light. Skies were partly cloudy over the Rockies, while sunny
skies were observed over the Pacific Northwest, California, Desert
Southwest, and Great Basin through much of the day. However, isolated
afternoon showers and thunderstorms were reported.
13th-19th...In the East, a cold front brought afternoon thunderstorms to
the Florida Peninsula. These storms brought frequent lightning, gusty
winds, hail and brief heavy downpours. Some areas had heavy rainfall
associated with heavy storms. Titusville, Florida received 1.49 inches
of rainfall, while Fort Myers, Florida reported 4.54 inches of
rainfall. In addition, large hail was reported in several locations.
Hail measuring 1.50 inches in diameter was reported in Vanderbilt
Beach, Florida. Further north, a few thunderstorms impacted the
Northern Great Lakes, with gusty winds, large hail and heavy rainfall.
Hail measuring up to 1.25 inches in diameter was reported near
Newberry, Michigan, with numerous other hail reports noted. Elsewhere,
high pressure dominated the Ohio Valley, Northeast, Mid-Atlantic and
Southeast with clear to partly cloudy skies. In the central states, a
strong storm system and trailing cold front brought a long line of
thunderstorms from the Upper Midwest down through the Central Plains.
Some of these became severe, with large hail, frequent lightning,
locally heavy downpours, and even a few isolated tornadoes. Numerous
reports of hail measuring an inch or more were noted across Wisconsin,
Iowa, Nebraska, and Kansas. Hail measuring 1.75 inches in diameter was
reported in Tamora, Nebraska and in Goehner, Nebraska. High wind gusts
also occurred with these storms. A 70 mph wind gust was reported in
York, Nebraska. Heavy downpours were also noted, as 1.11 inches of
rain fell in Aurora, Nebraska, and 1.18 inches fell in Ashland,
Wisconsin. Further south, the Southern Plains and Lower Mississippi
Valley also experienced scattered thunderstorms with some isolated
severe reports. The Mid-Mississippi Valley escaped the severe weather
as high pressure produced partly cloudy skies for the region. In the
West, widely scattered showers and thunderstorms impacted the Central
and Southern High Plains and Central Rockies. Some of these storms
became severe, with hail, gusty winds, frequent lightning, and heavy
downpours. Pea to marble sized hail was reported in several locations,
with 1 inch hail reported in Fort Collins, Colorado. Heavy rainfall
also occurred in areas such as Lupton, Colorado, where a half inch of
rain fell in 5 minutes. The Pacific Northwest, Great Basin, Northern
Rockies, California, and the Desert Southwest had clear to partly
cloudy skies.
As a cold front sliced into warm air along the Atlantic Seaboard
Wednesday afternoon and evening, a line of thunderstorms formed. While
there were no reports of tornadoes, gusty winds, downed trees and
power lines, the storms did manage to bring much-needed rain in some
locations, including the location of a major brush fire in south
Jersey. Most of the showers and thunderstorms fizzled as they moved
into parched areas of Georgia and northern Florida, where numerous
wild fires continued Thursday morning. A few strong thunderstorms
developed over the Great Lakes area Wednesday afternoon, as an upper-
level disturbance moved in. As cool air from the east rammed into the
southern Rockies and was forced uphill, strong thunderstorms formed
over the Four Corners region. Some of the storms produced flooding
downpours and one-inch-diameter hail Wednesday afternoon and evening.
Aside from pop-up thunderstorms over the Rockies, much of the balance
of the West was free of rain Wednesday.
20th-26th...In the East on Monday, a broad high pressure ridge centered
over the Tennessee Valley generated clear to partly cloudy skies and
dry conditions across much of the Middle Atlantic region, the Ohio and
Tennessee Valleys, the upper Midwest, the central Mississippi Valley,
and the Southeast. An upper-level ridge pushing into southeastern
Canada, brought unseasonable cooler temperatures to much of the
Northeast, with high temperatures ranging from five to fifteen degrees
below seasonal normals. Further south, a few afternoon showers were
reported across the southern tip of Florida by late this afternoon,
but pushed off-shore by the late evening hours. Temperatures across
the region reached into the 60s and 70s across the Northeast; and into
the upper 70s and 80s through the Great Lakes region, the Ohio and
Tennessee Valleys, the Mid-Atlantic region, the Southeast, and
Florida. Across the central portion of the nation, a broad trough of
low pressure pushed across the Rocky Mountain range and into the
Plains region, generating widespread showers and strong to severe
thunderstorms across the Dakotas, western portions of the central
Plains, and the southern Plains. Gusty winds, frequent lightning,
sizable hail, and heavy downpours of rain were the main threats with
this activity through the early evening hours. Further east, scattered
showers and isolated thunderstorms impacted western portions of the
lower Mississippi Valley this afternoon, but only light precipitation
was reported. Elsewhere, partly to mostly cloudy skies and generally
dry conditions continued throughout the afternoon and into the evening
across the eastern half of the central Plains. Afternoon high
temperatures reached into the 70s and 80s across the northern Plains;
and into the upper 70s to the lower 90s through the central and
southern Plains, and the Mississippi Valley. In the West, isolated
showers and lines of thunderstorms continued to impact the northern
and central Rockies, as a broad upper-level trough progressed
eastward. Scattered showers and isolated thunderstorms also impacted
much of the Pacific Northwest and the central and northern Great
Basin, while showers changed over to moderate snow showers above 5000
feet across western Montana and northern Idaho by early this
afternoon. To the south, a weak ridge of high pressure brought clear
to partly cloudy skies to the majority of California, the southern
Great Basin, and the Desert Southwest. Temperatures across the region
this afternoon reached into the upper 40s to the 60s across the
northern and central high Plains, the northern and central Rocky
Mountains, the Great Basin, the Pacific Northwest, and coastal
California; and into the 70s to the lower 90s through the southern
high Plains, the southern Rocky Mountains, the Desert Southwest, and
interior California.
In the East on Wednesday, isolated showers and thunderstorms began to
affect southern Georgia and northeastern Florida. Rainfall reported
has been light thus far. Another area of showers and thunderstorms
affected southern Alabama. Elsewhere across the East, high pressure
provided for fair to partly cloudy skies and dry conditions. Low
temperatures fell into the mid to upper 30s and the low to mid 40s
across the Northeast, the upper 40s and the low to upper 50s across
the Middle Atlantic, and into the 50s and 60s across the Great Lakes,
Ohio and Tennessee Valleys, as well as the Southeast. Across the
central United States, a low pressure system with associated fronts
produced areas of isolated showers and thunderstorms across the upper
and middle Mississippi Valley, as well as across the central Plains.
No severe weather has been reported. Another area of storms is
currently affecting Louisiana. A severe thunderstorm was reported near
Abbeville, Louisiana. High pressure provided for fair and dry
conditions elsewhere across the region. Low temperatures behind the
cold front dropped into the 30s and 40s, and remaind into the 50s and
60s ahead of the cold front across the northern and central Plains.
Elsewhere, low temperatures ranged from the upper 50s to the low 70s
across the Mississippi Valley and the southern Plains. Across the
West, an upper-level low pressure system continued to produce areas of
scattered showers and thunderstorms across the northern High Plains.
Rainfall amounts reported have generally been light. A cold front
produced areas of light rain showers across the central Great Basin
and the northern portions of the Desert Southwest. Elsewhere across
the West, high pressure allowed for fair and dry conditions. Low
temperatures ranged from the mid 30s to the upper 40s, with mid to
upper 20s across the higher elevations across the Pacific Northwest,
northern and central Great Basin, and the northern and central
Rockies. Farther south and west, low temperatures were reported in the
upper 40s, 50s, 60s and low 70s across the southern Rockies, Desert
Southwest and California.
Rich moisture from the Gulf of Mexico pouring inland and interacting
with an upper-level disturbance, heavy rain flooded parts of Texas,
especially the southern half of the state, Friday. Since midnight EDT
Friday, Harlingen, Texas, picked up over 9 inches of rain in 24 hours.
As the Gulf moisture continue to flow around the outer periphery of a
strong area of high pressure that was keeping the drought-stricken
South dry, flooding problems returned to the central Plains as showers
and thunderstorms erupted. The unsettled weather sparked along the
tail-end of a cold front, whose corridor of thunderstorms extended to
New York. Ahead of the cold front, summerlike heat baked the
Northeast. Numerous places across New England saw temperatures rise
into the lower 90s, setting new record highs for the date. A high of
92 degrees in Portland, Maine, was not only a new daily record high,
but was also the city's second warmest temperature ever recorded in
May. Friday's 90F heat in Portland also marked only the 13th such
occurrence in the city's history during the month of May. One day
after the Great Lakes had similar unseasonable heat, the air turned
noticeably cooler in the wake of the cold front Friday. After setting
a record high of 91 degrees Thursday, Fort Wayne, IN, had a more
seasonable high of 77F Friday. Meanwhile, another press of cooler air
headed into the northern Plains. As a storm system spread a chilly
rain from central Montana into North Dakota, the associated cold front
touched off severe thunderstorms, mainly hail-producing storms, from
southwestern North Dakota to western Nebraska. Thunderstorms, some
dropping heavy rain and hail, also touched off from western Kansas to
New Mexico. The rest of the Western states had a dry day. As the
Northwest enjoyed comfortable temperatures, the Southwest warmed.
27th-31...Showers and thunderstorms will focus once again on the middle
part of the country Tuesday afternoon as a storm system and its
associated cold front continue to hang over the region. Showers and
thunderstorms, along with plenty of clouds, extend from eastern Texas
and western Mississippi northward into Oklahoma, Arkansas, Kansas,
Nebraska, and Minnesota westward into the Dakotas, Wyoming, and
Montana. Precipitation will linger in this area through Tuesday night,
and some storms will contain heavy rainfall, aggravating existing
flooding or creating new flooding problems. Hail and strong winds will
also accompany strong or severe thunderstorms that develop as well,
especially from the Texas Panhandle into Kansas. Elsewhere in the
country, strong high pressure is anchored over the East Coast,
providing a good deal of sunshine from New England into the Southeast.
This high pressure is preventing the Plains' storm system from moving
farther east and, as a result, many locations will remain clear and
dry Tuesday night from New England into the Carolinas and Florida.
Another area of high pressure is settled over the Western U.S., and a
virtually cloud-free sky is found from Washington state and Idaho into
Utah, Nevada, California, New Mexico, and Arizona. The exception is
along coastal California, where low clouds and fog cover the coastline
and locations immediately inland. With this high pressure keeping any
storm systems at bay, clear, dry weather will persist through
Wednesday.
Across the East on Wednesday, scattered rain showers moved over New
England throughout the day. Rainfall amounts were light. Isolated
showers and thunderstorms developed over the Appalachians, northern
Great Lakes, Deep South, and along the Gulf Coast during the afternoon
hours. Hail fell in western Virginia. Rainfall amounts were less than
half an inch. Skies were partly cloudy and dry over the Mid-Atlantic
and portions of the Northeast. Over the central region, a low pressure
system located in the northern Plains produced scattered showers and
thunderstorms over the Plains and Mississippi Valley. Severe
thunderstorms pushed through the southern Plains early in the day,
with gusty winds and hail reported in Texas and Oklahoma. More
isolated activity developed over the Midwest and western Great Lakes
during the afternoon hours, however no severe weather was reported. In
the northern Plains, rainfall in excess of 2 inches fell in Aberdeen,
South Dakota throughout the day, and a tornado was spotted near Page,
North Dakota. Skies slowly cleared in the central Plains and western
Texas by midday. In the West, showers and a few thunderstorms
developed in the northern Rockies and along the Front Range during the
afternoon. Hail fell in northern Colorado with a few stronger
thunderstorms. Rainfall amounts were light. Over the rest of the
region, high pressure allowed for partly cloudy to mostly sunny skies
and dry conditions.
.
- Prev by Date: Re: CO2 Level at 650,000-Year High!
- Next by Date: National Storm Summary May 2007
- Previous by thread: Re: CO2 Level at 650,000-Year High!
- Next by thread: National Storm Summary May 2007
- Index(es):
Relevant Pages
|
|
