DAY3SVR: Nws Storm Prediction Center Norman Ok

ACUS03 KWNS 290826
SWODY3
SPC AC 290825

DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0225 AM CST THU NOV 29 2012

VALID 011200Z - 021200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
ONLY MARGINAL THUNDERSTORM POTENTIAL APPEARS POSSIBLE FOR THE D3
PERIOD. A BROAD UPPER TROUGH OFF THE PACIFIC COAST WILL CONTINUE TO
SUPPORT COPIOUS AMOUNTS OF PRECIPITATION ACROSS PORTIONS OF THE
PACIFIC NORTHWEST AND NRN/CNTRL CA. MINIMAL INSTABILITY IS EXPECTED
TO LIMIT LIGHTNING COVERAGE ACROSS THESE AREAS...WITH DAMAGING WIND
POTENTIAL MORE LIKELY A RESULT OF VERY STRONG GRADIENT WINDS AND
TERRAIN CHANNELING. AS SUCH...AN INTRODUCTION OF SEVERE
PROBABILITIES DOES NOT APPEAR NECESSARY. ISOLATED STRIKES ARE
POSSIBLE OVER THE NRN INTERMOUNTAIN REGION AMIDST SCANT INSTABILITY
AS AN UPPER DISTURBANCE ROTATES NEWD AHEAD OF THE MAIN LOW.

FARTHER EAST...A SUBTLE UPPER TROUGH WILL CROSS THE CNTRL
STATES...LEADING TO MARGINAL MOISTURE RETURN AND A SHARPENING DRY
LINE ACROSS THE SRN PLAINS. HOWEVER...VERY WEAK LAPSE RATES OWING TO
WARM/DRY AIR ALOFT WILL LIKELY HINDER THUNDERSTORM DEVELOPMENT.

OVERNIGHT...A FEW ELEVATED THUNDERSTORMS MAY BE POSSIBLE ACROSS
PORTIONS OF THE MIDWEST AS A SHORT WAVE TROUGH PROGRESSES THROUGH
THE AREA.

..DISPIGNA/HART.. 11/29/2012

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