DAY2SVR: Nws Storm Prediction Center Norman Ok

ACUS02 KWNS 101711
SWODY2
SPC AC 101709

DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1209 PM CDT MON SEP 10 2012

VALID 111200Z - 121200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
A BROAD UPPER LEVEL TROUGH WILL PROGRESS SLOWLY EASTWARD OVER
SRN/CENTRAL CANADA WHILE AN EMBEDDED IMPULSE MOVES INTO WRN QUEBEC
LATE TUE. A COLD FRONT ASSOCIATED WITH THIS IMPULSE WILL MOVE FROM
THE NRN PLAINS INTO THE WRN GREAT LAKES REGION. A WEAK CUT-OFF LOW
WILL DRIFT EWD OVER THE SWRN U.S. AS ANOTHER WEAK CUT-OFF LOW
DEVELOPS OVER THE CENTRAL GULF COAST.

...SWRN U.S. THROUGH GREAT BASIN AND SRN/CNTRL ROCKIES...
HIGH-BASED TSTMS DEVELOPING WITHIN A MOIST SUB-TROPICAL PLUME MAY
POSE AN ISOLATED THREAT OF GUSTY WINDS WHERE STRONGER DIABATIC
HEATING RESULTS IN LARGE TEMP-DEW POINT SPREADS.

...FL...
WEAKENING FRONTAL BOUNDARY MAY STALL OVER SRN FL TUE. TSTMS SHOULD
DEVELOP IN MOIST BOUNDARY LAYER AS DAYTIME HEATING RESULTS IN A
MODERATELY UNSTABLE AIR MASS. THE STRONGER TSTMS MAY PRODUCE GUSTY
SURFACE WINDS IN A HIGH-PW ENVIRONMENT WHERE PRECIP-LOADING ENHANCES
DOWNDRAFT STRENGTH.

...NRN PLAINS/UPPER MS VALLEY...
ISOLATED TSTMS MAY DEVELOP IN PROXIMITY TO EWD-MOVING COLD FRONT.
LACK OF LOW-LEVEL MOISTURE AND RESULTING WEAK INSTABILITY SHOULD
LIMIT OVERALL COVERAGE AND INTENSITY.

..BUNTING.. 09/10/2012

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