SWODY1
SPC AC 250042
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0742 PM CDT SAT SEP 24 2011
VALID 250100Z - 251200Z
...NO SVR TSTM AREAS FORECAST...
...WESTERN STATES...
ALTHOUGH SCATTERED THUNDERSTORMS ACROSS THE SOUTHERN SIERRA NEVADA
AND SOUTHEASTERN CALIFORNIA DESERTS INTO THE GREAT BASIN/SOUTHERN
PLATEAU HAVE BEEN AIDED BY FORCING ASSOCIATED WITH AN INLAND
PROGRESSING SHORT WAVE TROUGH...THE BULK OF THE ACTIVITY IS EXPECTED
TO DIMINISH BY 03-04Z WITH THE LOSS OF DAYTIME HEATING. SIMILAR
TRENDS ARE EXPECTED WITH STORMS WHICH HAVE RECENTLY FORMED ALONG AND
EAST OF THE SOUTHERN CASCADES.
...SOUTHEASTERN STATES...
SCATTERED THUNDERSTORMS CONTINUE...PARTICULARLY OVER THE INTERIOR
CENTRAL FLORIDA PENINSULA...BUT CONVECTIVE POTENTIAL APPEARS TO
GENERALLY BE DIMINISHING WITH THE LOSS OF DAYTIME HEATING. HIGHEST
THUNDERSTORM PROBABILITIES OVERNIGHT MAY EXIST WITHIN THE BROAD
LOW-LEVEL CONFLUENCE ZONE ACROSS THE WESTERN ATLANTIC INTO SOUTHERN
MID ATLANTIC COASTAL AREAS.
...CENTRAL U.S...
FORCING ASSOCIATED WITH IMPULSES PIVOTING AROUND A RETROGRADING
UPPER CLOSED LOW MAY CONTINUE TO CONTRIBUTE TO WEAK DESTABILIZATION
AND AREAS OF SCATTERED THUNDERSTORM ACTIVITY OVERNIGHT...ACROSS
PORTIONS OF THE LOWER OHIO VALLEY INTO THE GREAT LAKES...AND ACROSS
PARTS OF THE OZARK PLATEAU.
..KERR.. 09/25/2011
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