ACUS01 KWNS 011253
SWODY1
SPC AC 011251
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0651 AM CST SAT DEC 01 2012
VALID 011300Z - 021200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS/FORECAST...
THE LARGE-SCALE MID-LEVEL PATTERN OVER THE LOWER 48 STATES WILL
REMAIN PROGRESSIVE AND WEAKLY AMPLIFIED THROUGH THE PERIOD. CYCLONIC
FLOW WILL PERSIST OVER THE EAST PACIFIC OFF THE PACIFIC NW AND
BRITISH COLUMBIA COAST. AS EMBEDDED SHORTWAVE IMPULSES WITHIN THIS
FLOW REGIME MOVE ASHORE...WIDESPREAD PRECIPITATION WITH ISOLATED
WEAK THUNDERSTORMS WILL REMAIN POSSIBLE OVER THE COAST OF THE
PACIFIC NW. DOWNSTREAM...A SHORTWAVE TROUGH MOVING ACROSS THE CNTRL
U.S. WILL CONTINUE TO PROGRESS EWD...WITH ACCOMPANYING ASCENT
MAXIMIZED OVER ITS NRN EXTENT. THE CORRESPONDING MASS RESPONSE WILL
YIELD AN INFLUX OF MODEST LOW-LEVEL MOISTURE INTO THE GREAT LAKES
REGION...WHERE ASCENT AT THE TERMINUS OF A LOW-LEVEL JET MAX MAY
SUPPORT ISOLATED ELEVATED THUNDERSTORMS TONIGHT...ESPECIALLY LATE.
VERY MARGINAL BUOYANCY PROFILES AND WEAK EFFECTIVE BULK SHEAR
MAGNITUDES PER FORECAST SOUNDINGS WILL MITIGATE ANY SVR POTENTIAL.
..COHEN/CORFIDI.. 12/01/2012
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