DAY2SVR: Nws Storm Prediction Center Norman Ok

ACUS02 KWNS 300542
SWODY2
SPC AC 300540

DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1240 AM CDT THU AUG 30 2012

VALID 311200Z - 011200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
UPPER RIDGING WILL EXIST OVER MUCH OF THE CONUS FROM THE HIGH PLAINS
TO THE SERN STATES. THE REMNANTS OF ISAAC WILL CONTINUE TO BRING
MOISTURE NWD BENEATH THE RIDGE FROM AR INTO MO.

CYCLONIC FLOW ALOFT WILL OVERSPREAD THE NERN STATES WITH THE BASE OF
THE TROUGH ACROSS NRN NEW ENGLAND AT 00Z. A SFC TROUGH AND COLD
FRONT WILL ACCOMPANY THIS SYSTEM...SWEEPING SEWD LATE AND PROVIDING
A CHANCE OF THUNDERSTORMS.

TO THE W...SWLY FLOW ALOFT AROUND THE RIDGE WILL MAINTAIN A THREAT
OF AFTERNOON STORMS FROM INTERIOR SRN CA ACROSS THE GREAT BASIN.

...NY INTO NRN NEW ENGLAND...
A LOW PRESSURE TROUGH WILL DEEPEN ACROSS THE REGION DURING THE DAY
WITH SUBTLE HEIGHT FALLS EXPECTED AHEAD OF THE MAIN SHORTWAVE
TROUGH. COOL AIR ALOFT...DAYTIME HEATING AND LOWER 60S F DEWPOINTS
AHEAD OF THE APPROACHING COLD FRONT SHOULD YIELD MUCAPE AROUND 1000
J/KG. DEEP LAYER SHEAR WILL BE VERY FAVORABLE FOR SUPERCELLS WITH
NWLY FLOW ALOFT INCREASING TO OVER 60 KT IN THE MIDLEVELS. AT LEAST
ISOLATED THUNDERSTORMS ARE LIKELY BY AFTERNOON...WITH THE PRIMARY
MODE BEING SUPERCELLS WITH HAIL. GIVEN THE STRENGTH OF THE FLOW JUST
A FEW KM OFF THE SURFACE...SOME SEVERE WIND GUSTS MAY OCCUR AS WELL.

...AR INTO SRN MO...
THE REMNANTS OF ISAAC WILL MOVE NWD ACROSS AR DURING THE DAY AND
INTO SRN MO LATE. MOIST TROPICAL PROFILES AND ENHANCED SHEAR NEAR
THE CENTER MAY SUPPORT A BRIEF TORNADO...ESPECIALLY IF POCKETS OF
HEATING CAN OCCUR.

..JEWELL.. 08/30/2012

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