DAY2SVR: Nws Storm Prediction Center Norman Ok

ACUS02 KWNS 081714
SWODY2
SPC AC 081713

DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1113 AM CST THU NOV 08 2012

VALID 091200Z - 101200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...

A BROAD CORRIDOR OF HEIGHT FALLS WILL OVERSPREAD THE WRN U.S. INTO
THE NRN PLAINS/UPPER MS VALLEY OVER THE NEXT 48 HOURS. STEEPENING
LAPSE RATES COINCIDENT WITH POCKETS OF ASCENT SHOULD LEAD TO A FEW
AREAS OF SHALLOW CONVECTION...SOME OF IT MAY PRODUCE AN OCCASIONAL
LIGHTNING STRIKE.

...GREAT LAKES...

LOW LEVEL WARM ADVECTION WILL INCREASE ACROSS THE UPPER MS
VALLEY/GREAT LAKES REGION FRIDAY. THE PRIMARY FOCUS FOR ELEVATED
CONVECTION WILL BE ALONG/NORTH OF A SHARPENING WARM FRONT THAT
SHOULD EXTEND FROM SRN MN...EWD ACROSS SRN WI/LOWER MI. MOISTURE
RETURN INTO THIS ZONE OF ASCENT WILL INITIALLY BE SOMEWHAT MARGINAL
AND CAPPING WILL BE AN ISSUE OVER WRN PARTS OF THIS REGION. AT THIS
TIME IT APPEARS WEAK ELEVATED INSTABILITY SHOULD EVOLVE SUCH THAT
SHALLOW CONVECTION/ISOLATED TSTMS ROOTED NEAR 800MB ARE POSSIBLE.

...WESTERN U.S...

QUITE COLD MID LEVEL TEMPERATURES WILL SPREAD ACROSS THE WRN U.S. AS
UPPER TROUGH SHIFTS INLAND DURING THE DAY2 PERIOD. WHILE LAPSE
RATES WILL STEEPEN SIGNIFICANTLY IT APPEARS THE PRIMARY FOCUS FOR
CONVECTION CAPABLE OF PRODUCING A FEW LIGHTNING STRIKES WILL BE WITH
MARINE-INFLUENCED BUOYANCY ALONG THE ORE/CA COAST AND PERHAPS OVER
THE HIGHER TERRAIN OF SERN AZ WITHIN MOISTENING WARM SECTOR.

..DARROW.. 11/08/2012

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