DAY3SVR: Nws Storm Prediction Center Norman Ok

ACUS03 KWNS 010826
SWODY3
SPC AC 010824

DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0224 AM CST SAT DEC 01 2012

VALID 031200Z - 041200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
AMPLIFICATION OF THE UPPER PATTERN IS FORECAST TO CONTINUE THIS
PERIOD...AS THE SHORT-WAVE TROUGH MOVING EWD INTO THE NRN PLAINS
EARLY IN THE PERIOD EXPANDS AS IT MOVES INTO ONTARIO/TOWARD THE
UPPER GREAT LAKES AND UPPER MS VALLEY THROUGH THE PERIOD.

AS THIS TROUGH ADVANCES...THE ACCOMPANYING SURFACE COLD FRONT WILL
ALSO SHIFT EWD...ADVANCING ACROSS THE PLAINS THROUGH THE DAY AND
THEN ACROSS THE UPPER GREAT LAKES REGION THROUGH THE SECOND HALF OF
THE PERIOD. A SLOWER ADVANCE OF THIS BOUNDARY WILL OCCUR ACROSS THE
CENTRAL AND SRN PLAINS...WITH THE FRONT PROGGED TO EXTEND FROM LOWER
MI SWWD INTO CENTRAL TX BY THE END OF THE PERIOD.

AS LOW-LEVEL SLY WINDS AHEAD OF THE SYSTEM ALLOW SOME MOISTENING TO
OCCUR THROUGH THE DAY...EXPECT SHOWERS TO FORM ALONG THE FRONT FROM
THE GREAT LAKES REGION SWWD BY LATE AFTERNOON/EARLY EVENING. THOUGH
DESTABILIZATION SHOULD PROVE INSUFFICIENT FOR APPRECIABLE THUNDER
POTENTIAL FROM THE OH VALLEY NWD...DEEPER CONVECTION MAY DEVELOP
FARTHER SW -- ACROSS THE OZARKS REGION AND INTO ERN OK.
HERE...AMPLE THUNDER POTENTIAL APPEARS TO EXIST FROM EVENING ONWARD
TO WARRANT INCLUSION OF A SMALL 10% THUNDER AREA.

..GOSS.. 12/01/2012

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