DAY3SVR: Nws Storm Prediction Center Norman Ok

ACUS03 KWNS 020829
SWODY3
SPC AC 020827

DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0227 AM CST SUN DEC 02 2012

VALID 041200Z - 051200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
AS AN UPPER TROUGH OVER CENTRAL NOAM AT THE START OF THE PERIOD
CONTINUES EWD -- REACHING ERN CANADA AND THE ERN U.S. BY THE END OF
THE PERIOD...FAST/QUASI-ZONAL WLY FLOW WILL BECOME RE-ESTABLISHED
OVER THE W WITH TIME.

AS THE MAIN UPPER TROUGH CONTINUES EWD...THE ACCOMPANYING SURFACE
COLD FRONT IS FORECAST TO MOVE QUICKLY EWD ACROSS THE NE...BUT MORE
SLOWLY SEWD ACROSS THE S CENTRAL CONUS.

WITH A FAIRLY MOIST LOW-LEVEL AIRMASS IN PLACE ACROSS THE WRN AND
CENTRAL GULF COAST REGION AND NWD ACROSS THE LOWER MS
VALLEY...MODEST INSTABILITY WITHIN THE PRE-FRONTAL WARM SECTOR
SHOULD PROMOTE CONTINUED SHOWER AND THUNDERSTORM ACTIVITY WHICH
SHOULD BE ONGOING FROM THE ARKLATEX TO THE TN VALLEY AT THE START OF
THE PERIOD. HOWEVER...FLOW ALOFT IS FORECAST TO REMAIN
MARGINAL...WITH LOWER AND MIDDLE TROPOSPHERIC WINDS REMAINING
GENERALLY AOB 30 KT. THEREFORE -- THOUGH SMALL HAIL AND LOCALLY
GUSTY WINDS MAY BE POSSIBLE...ANY SEVERE THREAT APPEARS WELL BELOW
THE THRESHOLD WHICH WOULD DRIVE INTRODUCTION OF EVEN LOW SEVERE
PROBABILITY ATTM.

..GOSS.. 12/02/2012

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