DAY3SVR: Nws Storm Prediction Center Norman Ok

ACUS03 KWNS 130701
SWODY3
SPC AC 130700

DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0200 AM CDT THU SEP 13 2012

VALID 151200Z - 161200Z

...SYNOPSIS...

UPPER FLOW WILL TRANSITION TO QUASI-ZONAL OVER THE NRN TIER STATES
IN WAKE OF NRN STREAM SHORTWAVE TROUGH THAT WILL EXIT THE NERN U.S.
EARLY IN THE PERIOD. FARTHER SOUTH AN UPPER LOW EMBEDDED IN WEAK
FLOW ALOFT INITIALLY OVER NM AT 12Z SATURDAY WILL DRIFT SLOWLY SWD.
AT THE SFC A COLD FRONT WILL CONTINUE OFF THE NERN ATLANTIC SEABOARD
WITH TRAILING PORTIONS EXTENDING SWWD AND BECOMING STATIONARY FROM
THE GULF COASTAL REGION INTO S TX.

...SRN PLAINS THROUGH THE GULF COASTAL REGION AND FL...

PRIMARY ZONE OF CONVECTIVE DEVELOPMENT INCLUDING POTENTIAL FOR A FEW
THUNDERSTORMS SHOULD PERSIST ACROSS SRN PLAINS AREA WHERE THE
CIRCULATION AROUND THE UPPER LOW WILL MAINTAIN ISENTROPIC ASCENT IN
POST FRONTAL ZONE. THIS REGION WILL RESIDE IN PLUME OF SUBTROPICAL
MOISTURE WITH NEAR MOIST ADIABATIC PROFILES AND WEAK INSTABILITY.

OTHER SHOWERS AND THUNDERSTORMS WILL LIKELY DEVELOP WITHIN THE MOIST
AND WEAKLY CAPPED ENVIRONMENT ALONG AND SOUTH OF STATIONARY FRONT
FROM THE GULF COAST AREA THROUGH FL.

..DIAL.. 09/13/2012

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