Wednesday, December 3, 2008

DAY2SVR: Nws Storm Prediction Center Norman Ok

ACUS02 KWNS 030558
SWODY2
SPC AC 030555

DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1155 PM CST TUE DEC 02 2008

VALID 041200Z - 051200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
LARGE-SCALE UPPER TROUGHING/CYCLONIC FLOW IS FORECAST TO PERSIST
ACROSS THE CONUS FROM THE ROCKIES EWD...WHILE AN EMBEDDED SHORT-WAVE
TROUGH CROSSING THE GULF COAST REGION WEAKENS WITH TIME.

AT THE SURFACE...A COLD FRONT SHOULD EXTEND FROM A LOW OVER QUEBEC
SWWD ACROSS THE LOWER GREAT LAKES...AND THEN ON SWWD INTO THE
CENTRAL GULF COAST REGION. THIS FRONT WILL MOVE EWD/SEWD WITH
TIME...MOVING INTO THE ATLANTIC BUT LINGERING OVER FL AND THE GULF
OF MEXICO THROUGH THE END OF THE PERIOD.

...LOWER MS VALLEY...
SHOWERS AND A FEW THUNDERSTORMS SHOULD BE ONGOING AT THE START OF
THE PERIOD OVER THE LOWER MS VALLEY REGION...WHERE MINIMAL
INSTABILITY SHOULD BE LINGERING AHEAD OF THE ADVANCING FRONT. WHILE
A VERY LOW-PROBABILITY THREAT SEVERE THREAT MAY LINGER INTO THE
START OF THIS FORECAST PERIOD...DEGREE OF THREAT DOES NOT WARRANT
THE INCLUSION OF EVEN A LOW-PROBABILITY AREA ATTM.

ONSHORE THUNDER POTENTIAL SHOULD DIMINISH WITH TIME THROUGH THE DAY
ACROSS THE CENTRAL GULF COAST REGION...AND ELSEWHERE THUNDERSTORMS
ARE NOT ANTICIPATED.

..GOSS.. 12/03/2008

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