SWODY3
SPC AC 180724
DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0224 AM CDT WED MAR 18 2009
VALID 201200Z - 211200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
THE UPPER TROUGH OVER ERN NOAM AT THE START OF THE PERIOD IS
FORECAST TO CONTINUE EWD...WITH THE U.S. SHORT-WAVE PORTION OF THIS
TROUGH TO MOVE OFF THE ATLANTIC COAST. AS THIS OCCURS...THE
ASSOCIATED COLD FRONT SHOULD CONTINUE SEWD OFF THE GULF AND ATLANTIC
COASTS THROUGH THE END OF THE PERIOD.
UPSTREAM...LARGE-SCALE TROUGHING IS FORECAST TO EXPAND ACROSS THE
WEST WITH TIME...WITH A SMALLER-SCALE TROUGH WITHIN THE BROADER
CYCLONIC FLOW CROSSING THE SWRN CONUS AND A SECOND MOVING INTO THE
PAC NW. THIS TROUGH WILL BE ACCOMPANIED BY A COLD FRONT -- WHICH
SHOULD MOVE ACROSS THE PAC NW THROUGH THE PERIOD.
ASIDE FROM WEAK CONVECTION POSSIBLE INVOF S FL...THE MAIN AREA OF
CONVECTION THIS PERIOD SHOULD OCCUR OVER THE WEST...FROM PARTS OF
THE GREAT BASIN INTO THE SRN ROCKIES. HOWEVER...WEAK INSTABILITY
ACROSS EACH OF THESE AREAS WILL LIKELY PRECLUDE ANY APPRECIABLE
SEVERE POTENTIAL.
..GOSS.. 03/18/2009
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