Tuesday, August 28, 2012

DAY3SVR: Nws Storm Prediction Center Norman Ok

ACUS03 KWNS 280726
SWODY3
SPC AC 280724

DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0224 AM CDT TUE AUG 28 2012

VALID 301200Z - 311200Z

...SYNOPSIS...
RELATIVELY LOW-AMPLITUDE FLOW FIELD IS FORECAST ACROSS MOST OF THE
U.S. THIS PERIOD...WITH RIDGING PREVAILING ACROSS MOST OF THE
COUNTRY WHILE THE MAIN BELT OF WLYS REMAINS CONFINED TO THE NRN
U.S./SRN CANADA.

WHILE A SURFACE FRONT FORECAST TO EXTEND INTO THE N CENTRAL CONUS IS
PROGGED TO BECOME INCREASINGLY ELONGATED W-E WITH TIME...THE MAIN
FEATURE THIS PERIOD WILL BE WEAKENING TROPICAL SYSTEM ISAAC. PLEASE
REFER TO THE LATEST NHC FORECASTS FOR INFORMATION ON T.S. ISAAC.

...LOWER AND MID MS/TN VALLEYS INCLUDING MUCH OF MS/AL...
TROPICAL SYSTEM ISAAC -- CURRENTLY FORECAST TO BE MOVING SLOWLY NWD
ACROSS THE MID MS VALLEY AREA DAY 3-- WILL LIKELY FOCUS AN AREA OF
ISOLATED TORNADO POTENTIAL WITHIN ITS NERN QUADRANT WHERE MOST
FAVORABLE LOW-LEVEL SHEAR WILL EXIST. ATTM...BASED ON THE CURRENT
TRACK FORECAST...THE THREAT AREA WOULD INCLUDE AREAS FROM THE LOWER
AND MID MS VALLEY REGION EWD INTO TN AND AL. CONSIDERABLE
UNCERTAINTY EXISTS ATTM REGARDING THE EVOLUTION OF ISAAC...AND THUS
WILL NOT INTRODUCE SLIGHT RISK ATTM.

..GOSS.. 08/28/2012

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