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August 14 National Weather Roundup

By: associated press
By: associated press

The Nation's Weather: Friday, August 14, 2009

NATIONAL WEATHER SUMMARY:
Pop-up afternoon thunderstorms were experienced from New England, southwards through the Northeast, Mid-Atlantic, Carolinas and into the Deep South on Thursday with the most vigorous activity across portions of Florida and the Carolinas. Storms across Florida were driven by the sea breeze convergence, with locally excessive lightning and rainfall. A single report of wind damage came out of St. Augustine in Florida where a tree was blown down over a fence. Further north across the Carolinas, flooding was a concern with a combination of slow moving storms and a few days of heavy rains.
Localized urban and small stream flooding was reported in the
height of the activity, but subsided by the late evening hours as
storms largely died off. Shower and thunderstorm activity from the
Mid-Atlantic northwards into New England was generally unimpressive
on radar and only produced some locally moderate rainfall totals
and a few wind gusts to 30 mph. Dry conditions held for the Ohio
and Tennessee Valley, as well as the Northern Great Lakes.
The central states were split between storms over the northern and southern tiers, with dry conditions in the middle. The more
intense of the storms was oddly enough across the northern reaches
where some strong to severe storms roared in the afternoon and
evening hours. A storm in South Dakota produced golf ball sized hail and winds in excess of 50 mph. Showers and storms that formed mid day across southern Minnesota traipsed into Wisconsin by the late evening hours and produced some locally high winds and moderate rainfall. Showers and thunderstorms across the southern half of Texas were fairly scattered in nature with no reports of significant rainfall or severe weather. A few evening storms also moved out of eastern Colorado and into Nebraska, but by and large the central reaches of the region remained dry through the day.
Even the typically dry western states got in on the thunderstorm action, with some strong and severe storms across Montana, Utah and Colorado. The storms in Montana were responsible for some small hail and wind gusts to near 45 mph as a frontal system pushed across the northern Rockies. Quarter-sized hail was also reported out of a storm in Colorado, while gusty winds were associated with storms in Utah. Much of the rest of the Eastern Great Basin, Rockies and Desert Southwest also experienced thunderstorms during the day, although activity was generally scattered and carried no
major threats. Passing showers rotated through portions of the
Pacific Northwest on the south side of an advancing trough, while
California and Nevada remained fair and dry.

WEATHER EXTREMES FOR YESTERDAY:
HIGHEST TEMPERATURE (DEGREES F)............107 Blythe, CA
.............................................. Imperial, CA
HIGHEST HEAT INDEX (DEGREES F).............107 Palm Springs, CA
LOWEST TEMPERATURE (DEGREES F)..............34 Stanley, ID
LOWEST WIND CHILL (DEGREES F)...............33 Stanley, ID
HIGHEST WIND GUST (MPH).....................56 Borger, TX
HIGHEST PRECIPITATION (INCHES)............2.27 McEntire ANG
Base, SC

ON THIS DATE IN HISTORY:
In 1936, an all time record high of 113 degrees was hit in
Kansas City, Missouri in the midst of 16 straight days of 100 degree.
In 1987, slow moving thunderstorms dropped nearly 10 inches of rain at OHare Airport in 18 hours. This was part of Chicago's worst flash flood event, with flooding over a five day period causing 221 million dollars in damages.
In 1993, the crest of the Great Mississippi River flood reached New Orleans, Louisiana. However, it was not noticed as the river only rose to 12.5 feet, 4.5 feet below the flood stage.

DTN/Meteorlogix


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