Monday, December 19, 2011

DAY2SVR: Nws Storm Prediction Center Norman Ok

ACUS02 KWNS 191652
SWODY2
SPC AC 191650

DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1050 AM CST MON DEC 19 2011

VALID 201200Z - 211200Z

...THERE IS A SLGT RISK OF SVR TSTMS OVER PARTS OF MS/AL/TN...

A LEAD SHORTWAVE TROUGH CURRENTLY OVER WEST TX WILL TRACK EASTWARD
AND ACROSS THE LOWER MS VALLEY TUESDAY MORNING. THIS SYSTEM WILL
BRING WIDESPREAD CLOUDS AND PRECIPITATION TO PORTIONS OF AR/MS/TN.
STRONG SOUTHERLY LOW LEVEL WINDS THROUGH THE DAY WILL ALSO HELP TO
BEGIN TRANSPORTING GULF MOISTURE NORTHWARD INTO THE REGION. BRIEF
SHORTWAVE RIDGING IS LIKELY THROUGH THE EARLY AFTERNOON...BEFORE THE
NEXT AND STRONGER UPPER IMPULSE APPROACHES AFTER DARK. COOLING MID
LEVEL TEMPERATURES AND DEWPOINTS IN THE UPPER 50S/LOWER 60S WILL
RESULT IN AT LEAST MARGINAL CAPE VALUES OVER PORTIONS OF MS/AL/TN
WHERE FAVORABLE LOW LEVEL AND DEEP LAYER VERTICAL SHEAR WILL
CO-EXIST. ISOLATED STRONG OR EVEN SUPERCELL STORMS WILL BE POSSIBLE
TUESDAY EVENING-NIGHT OVER THIS AREA WITH A RISK OF HAIL...GUSTY
WINDS...OR A BRIEF TORNADO. THE LACK OF A MORE ROBUST RETURN OF
RICH GULF MOISTURE IS THE MAIN LIMITING FACTOR FOR THIS SEVERE
WEATHER THREAT.

..HART.. 12/19/2011

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