SWODY3
SPC AC 130730
DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0230 AM CDT THU SEP 13 2007
VALID 151200Z - 161200Z
..NO SVR TSTM AREAS FORECAST...
..SYNOPSIS...
LARGE SURFACE HIGH IS FORECAST ACROSS THE ERN HALF OF THE U.S. THIS
PERIOD...AS COLD FRONT MOVES EWD OFF THE ATLANTIC COAST AND SWD TO
THE GULF COAST/NRN GULF OF MEXICO THROUGH THE FIRST HALF OF THE
PERIOD. AS UPPER SHORT-WAVE TROUGH SHIFTS NEWD AWAY FROM THE
NORTHEAST CONUS...FLATTER/DEAMPLIFYING CYCLONIC FLOW WILL PREVAIL
ACROSS THE EAST. MEANWHILE...A FLAT RIDGE WILL REMAIN OVER THE S
CENTRAL AND SWRN STATES...AS AN UPPER LOW LINGERS INVOF NRN CA.
THOUGH THE WNWLY FLOW ACROSS THE ROCKIES AND WEAK DISTURBANCES
EMBEDDED WITHIN THIS FLOW BOTH SUGGEST SURFACE PRESSURE FALLS ACROSS
THE PLAINS -- AND IN RESPONSE A MODERATELY-STRONG LOW-LEVEL JET --
IT APPEARS THAT A LACK OF APPRECIABLE LOW-LEVEL MOISTURE SHOULD
PRECLUDE THE DEVELOPMENT OF ELEVATED CAPE. THUS...SEVERE THREAT IS
NOT ANTICIPATED ATTM IN THE CENTRAL CONUS. ELSEWHERE...WEAK LAPSE
RATES AND WEAK SHEAR ARE FORECAST INVOF THE FRONT AS IT MOVES SEWD
ACROSS THE SERN CONUS -- AND THUS APPRECIABLE SEVERE WEATHER APPEARS
UNLIKELY.
.GOSS.. 09/13/2007
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