DAY3SVR: Nws Storm Prediction Center Norman Ok

ACUS03 KWNS 070813
SWODY3
SPC AC 070811

DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0211 AM CST SAT DEC 07 2013

VALID 091200Z - 101200Z

...NO TSTM AREAS FORECAST...

...SYNOPSIS...
A VERY LARGE/POSITIVELY TILTED UPPER TROUGH -- WHOSE AXIS IS PROGGED
TO EXTEND FROM CENTRAL CANADA AND THE N CENTRAL U.S. SWWD INTO THE
DESERT SW EARLY IN THE PERIOD -- IS PROGGED TO CONTINUE SHIFTING
GRADUALLY EWD WITH TIME...WHILE SEVERAL SMALLER-SCALE FEATURES
PROGRESS THROUGH THE LARGER-SCALE FLOW FIELD.

WITH COLD CONTINENTAL AIR PREVAILING ACROSS THE MAJORITY OF THE
CONUS...THUNDER RISK SHOULD REMAIN NEGLIGIBLE IN MOST AREAS. ONE
EXCEPTION COULD BE ACROSS THE SOUTHEAST STATES...MAINLY WITHIN A
POST-FRONTAL REGIME BEHIND THE BAROCLINIC ZONE SHIFTING ACROSS THE
REGION. HOWEVER...WITH VERY MEAGER INSTABILITY AND LIKELIHOOD THAT
CONVECTION WILL REMAIN LOW-TOPPED -- AND THUS LIKELY TO PRODUCE
LITTLE LIGHTNING...WILL NOT HIGHLIGHT A 10% THUNDER AREA ATTM.

..GOSS.. 12/07/2013

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