SWODY1
SPC AC 131923
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0123 PM CST WED JAN 13 2010
VALID 132000Z - 141200Z
...NO TSTM AREAS FORECAST...
...SWRN U.S...
UPPER TROUGH AXIS IS SHIFTING EAST ACROSS CA TOWARD THE LOWER CO
RIVER VALLEY. LARGE SCALE ASCENT IS NOW WELL INLAND IN ASSOCIATION
WITH THICKER MID-HIGH LEVEL CLOUDINESS FROM SRN NV INTO NWRN AZ.
ALTHOUGH MID LEVEL MOISTURE IS CONTRIBUTING TO WEAK ELEVATED
INSTABILITY ACROSS THIS REGION...AND SCATTERED SHALLOW CONVECTION IS
LIKELY TO CONTINUE...IT DOES NOT APPEAR SUFFICIENT BUOYANCY EXISTS
ACROSS THIS REGION TO WARRANT AN ORGANIZED THUNDER OUTLOOK THE REST
OF THE PERIOD.
..DARROW.. 01/13/2010
.PREV DISCUSSION... /ISSUED 1008 AM CST WED JAN 13 2010/
TROUGH HAS MOVED INLAND OVER CA AND WITH UPSTREAM RIDGING...WILL DIG
SEWD INTO AZ/NWRN MEXICO BY 12Z THU. WITH INCREASING SUBSIDENCE AND
DIMINISHING ONSHORE FLOW OF PAC MOISTURE...THREAT OF THUNDERSTORMS
SHOULD BE ABOUT OVER TO THE W OF SIERRAS.
IT WILL BE DIFFICULT TO DEVELOP MUCH INSTABILITY UNDER THE DIGGING
TROUGH INTERIOR SECTIONS OF SWRN U.S. AS LOW LEVEL AIR MASS
INITIALLY LACKING IN MOISTURE.
WITH ASCENT ASSOCIATED WITH DIGGING TROUGH AND STEEPENING LAPSE
RATES WILL MAINTAIN A LOW PROBABILITY OF THUNDERSTORMS THIS
AFTERNOON INTO TONIGHT GENERALLY ACROSS SRN NV INTO NWRN AZ.
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