DAY3SVR: Nws Storm Prediction Center Norman Ok

ACUS03 KWNS 290604
SWODY3
SPC AC 290603

DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0103 AM CDT WED AUG 29 2012

VALID 311200Z - 011200Z

...SYNOPSIS...
AN UPPER RIDGE AXIS WILL BE LOCATED OVER THE PLAINS STATES WITH
ISAAC BRINGING MOISTURE NWWD ACROSS THE SRN PLAINS AND LOWER MS
VALLEY. TO THE NE...A BROAD UPPER TROUGH WILL OVERSPREAD THE NERN
STATES WITH MODERATE NWLY FLOW AND COOLING ALOFT. AT THE SURFACE...A
WEAK LOW PRESSURE TROUGH WILL TRAIL SWWD FROM THE PARENT LOW INTO
NEW ENGLAND WITH SCATTERED THUNDERSTORMS. ELSEWHERE...DAYTIME STORMS
WILL PERSIST OVER THE GREAT BASIN.

...AR INTO NRN LA...
THE REMNANTS OF ISAAC SHOULD CONTINUE NWD ACROSS WRN AR INTO SWRN MO
WITH WIND AND RAIN. ENHANCED SHEAR PROFILES E OF THE LOW CENTER WILL
BE ENHANCED AND THE PRESENCE OF TROPICAL MOISTURE MAY LEAD TO A FEW
BRIEF TORNADOES WITH THE MORE INTENSE RAIN BAND STORMS. POCKETS OF
HEATING WILL ENHANCE THE THREAT LOCALLY. THE DENOTED SEVERE AREA IS
LIKELY TO SHIFT SOMEWHAT AS STORM TRACK IS ADJUSTED.

...NRN NY EWD INTO ME...
A NWLY FLOW REGIME WILL MATERIALIZE ACROSS THE NERN STATES ON
FRIDAY...WITH THE POSSIBILITY OF SOME SEVERE HAIL AND WIND.
HODOGRAPHS WILL BE LONG AND WILL FAVOR SUPERCELLS. WITH DAYTIME
HEATING...LOW TO MIDLEVEL LAPSE RATES WILL ALSO BE STEEP...AND WILL
SUPPORT LARGE HAIL EVEN WITH MARGINAL LOW LEVEL MOISTURE. GIVEN WEAK
FORCING...STORM COVERAGE IS UNCERTAIN...BUT CONDITIONALLY THERE WITH
BE A SEVERE THREAT.

..JEWELL.. 08/29/2012

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