DAY3SVR: Nws Storm Prediction Center Norman Ok

ACUS03 KWNS 260806
SWODY3
SPC AC 260804

DAY 3 CONVECTIVE OUTLOOK CORR 1
NWS STORM PREDICTION CENTER NORMAN OK
0304 AM CDT SUN AUG 26 2012

VALID 281200Z - 291200Z

...THERE IS A SLGT RISK OF SVR TSTMS ACROSS THE CENTRAL AND ERN GULF
COAST STATES AND MUCH OF GA...

CORRECTED TO ADD SLGT RISK LINE TO THE CATEGORICAL GRAPHIC

...SYNOPSIS...
WHILE VERY SLOW EWD PROGRESSION OF THE LONGWAVE NERN U.S. TROUGH
OCCURS THIS PERIOD...FASTER PROGRESSION OF THE WRN TROUGH IS
FORECAST...AS IT MOVES ONSHORE ACROSS THE PAC NW THROUGH THE PERIOD.
IN BETWEEN...A RIDGE WILL REMAIN IN PLACE FROM THE SWRN U.S./SRN
ROCKIES NEWD INTO CENTRAL AND NRN PLAINS. THE MAIN FEATURE OF
INTEREST THIS PERIOD WILL AGAIN BE TROPICAL SYSTEM ISAAC...WHICH
SHOULD CROSS THE ERN GULF OF MEXICO THROUGH THE DAY...AND
APPROACH/REACH THE COAST WITHIN A ZONE STRETCHING FROM THE MOUTH OF
THE MS RIVER TO THE FL PANHANDLE LATE IN THE PERIOD. FOR ADDITIONAL
FORECAST INFORMATION ON ISAAC...PLEASE REFER TO THE LATEST FORECASTS
FROM THE NHC.

...CENTRAL AND ERN GULF COAST STATES/MUCH OF GA...
PROJECTED-TO-BE HURRICANE ISAAC IS FORECAST TO BE SHIFTING NNWWD
ACROSS THE ERN GULF EARLY IN THE PERIOD...WITH A LARGE AREA WITHIN
THE NERN QUADRANT OF THE SYSTEM TO EXPERIENCE FAVORABLY STRONG
LOW-LEVEL SHEAR. AS MULTIPLE BANDS OF CONVECTION SWEEP ACROSS THE
RISK AREA...ISOLATED TORNADOES ARE EXPECTED WITH LONGER-LIVED
ROTATING CELLS. WHILE THE THREAT AREA ENCOMPASSES A LARGE PORTION
OF THE SOUTHEAST...GREATER POTENTIAL MAY EVOLVE DURING THE SECOND
HALF OF THE PERIOD IN THE IMMEDIATE PROXIMITY OF STORM AS IT
APPROACHES THE COAST.

..GOSS.. 08/26/2012

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