SWODY3
SPC AC 170717
DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0217 AM CDT TUE MAR 17 2009
VALID 191200Z - 201200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
ERN U.S. UPPER TROUGH IS FORECAST TO CONTINUE AMPLIFYING THIS PERIOD
AS IT SHIFTS EWD TOWARD THE ATLANTIC COAST THROUGH THE PERIOD.
MEANWHILE...AN UPSTREAM TROUGH OVER THE NERN PACIFIC IS FORECAST TO
DIG SEWD TOWARD THE PAC NW COAST LATE.
AT THE SURFACE...A COLD FRONT IS FORECAST TO MOVE ACROSS THE PAC NW
DURING THE SECOND HALF OF THE PERIOD AS THE UPPER TROUGH APPROACHES.
ELSEWHERE...HIGH PRESSURE IS FORECAST E OF THE ROCKIES IN THE WAKE
OF A COLD FRONT -- ASSOCIATED WITH THE ERN TROUGH -- AS IT SAGS SWD
ACROSS THE GULF COAST STATES THROUGH THE PERIOD.
THE PRIMARY CONVECTIVE POTENTIAL THIS PERIOD SHOULD EVOLVE ACROSS
THE GULF COAST STATES/SERN CONUS...AS THE AFOREMENTIONED COLD FRONT
SAGS SWD INTO A WEAKLY-UNSTABLE WARM SECTOR. SEVERE THREAT HOWEVER
APPEARS MINIMAL...DUE TO THE OVERALL LACK OF APPRECIABLE INSTABILITY
AND WEAK FLOW ALOFT.
..GOSS.. 03/17/2009
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