SPC AC 131959
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0159 PM CST SUN DEC 13 2009
VALID 132000Z - 141200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS/FORECAST...
FEW CHANGES TO ONGOING FORECAST SCENARIO/CONVECTIVE OUTLOOK.
ISOLATED TSTMS REMAIN POSSIBLE ACROSS THE SOUTHEAST STATES. SOME
ROGUE TSTM POTENTIAL WILL ALSO CONTINUE ACROSS THE FOUR CORNERS
VICINITY AS A SHORTWAVE TROUGH CROSSES THE REGION...BUT
PROBABILITIES ARE LESS THAN 10 PERCENT.
..GUYER.. 12/13/2009
.PREV DISCUSSION... /ISSUED 1020 AM CST SUN DEC 13 2009/
...SERN STATES...
DEAMPLIFYING MID/UPPER LEVEL TROUGH WILL CONTINUE ENEWD ACROSS MUCH
OF THE EAST COAST TODAY...WITH INCREASING SWLY LOW LEVEL FLOW AND
RESULTANT WAA EVOLVING FROM THE SERN U.S. INTO THE MID ATLANTIC AND
NORTHEAST. STATIONARY SURFACE FRONT WILL LIKELY REMAIN IN PLACE
FROM THE ERN CAROLINAS INTO THE CENTRAL/NERN GULF COAST REGION...AND
A FEW THUNDERSTORMS MAY PERSIST ALONG THE SRN PORTION OF THIS
BOUNDARY. OTHERWISE...STRENGTHENING LOW LEVEL WAA SHOULD ALLOW
EMBEDDED...ELEVATED THUNDERSTORM DEVELOPMENT WITHIN BROAD AREA OF
MOIST CONVECTION ATOP COOL/STABLE SURFACE AIR. OVERALL SEVERE THREAT
WILL REMAIN QUITE LIMITED.
CLICK TO GET WUUS01 PTSDY1 PRODUCT
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 0100Z
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