[SWODY2] SWODY2

[Severe Weather Outlook - Day 2]

ACUS02 KWNS 200654
SWODY2
SPC AC 200653

DAY 2 CONVECTIVE OUTLOOK  
NWS STORM PREDICTION CENTER NORMAN OK
1253 AM CST TUE DEC 20 2005

VALID 211200Z - 221200Z

GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 40 WNW BLI 25 SE OLM
45 NNE MFR 25 SE RBL 25 NNE MER 25 WNW BFL 50 S OXR.

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
A PROGRESSIVE AND DEAMPLIFYING FLOW PATTERN ALOFT IS FORECAST THIS
PERIOD...AS ERN TROUGH BEGINS SHIFTING INTO THE ATLANTIC AND THE ERN
PACIFIC TROUGH MOVES ONSHORE.  AS A RESULT...WRN RIDGE SHOULD
FLATTEN AS IT MOVES INTO THE CENTRAL PART OF THE COUNTRY.

WEAK SURFACE LOW INITIALLY FORECAST OFF THE FL ATLANTIC COAST SHOULD
SHIFT EWD AHEAD OF ADVANCING UPPER TROUGH.  ASSOCIATED COLD FRONT
SHOULD CONTINUE MOVING SEWD AWAY FROM THE SRN FL PENINSULA...TAKING
WITH IT THE TROPICAL BOUNDARY LAYER AND ANY RELATED THUNDER THREAT. 
THE ONLY THUNDER POTENTIAL THIS PERIOD APPEARS TO EXIST IN
CONJUNCTION WITH THE ONSHORE PROGRESSION OF THE WRN U.S. TROUGH.

...THE WEST...
COLD AIR ALOFT/STEEPER MID-LEVEL LAPSE RATES ASSOCIATED WITH TROUGH
MOVING ONSHORE SHOULD RESULT IN MARGINAL BUT SUFFICIENT INSTABILITY
FOR A FEW THUNDERSTORMS EMBEDDED WITHIN LARGE AREA OF PRECIPITATION
FORECAST TO MOVE ACROSS THIS REGION.  THOUGH A STRIKE OR TWO MAY BE
POSSIBLE OVER THE SIERRA -- OR EVEN ACROSS PORTIONS OF THE GREAT
BASIN...THE GREATEST -- ALBEIT STILL LIMITED -- COVERAGE OF
LIGHTNING SHOULD REMAIN CONFINED PRIMARILY TO THE COASTAL RANGES.

..GOSS.. 12/20/2005

...NOTICE...
THE STATION RELATIVE POINTS IN THIS PRODUCT WILL BE
DISCONTINUED ON 14 FEBRUARY 2006 BUT WILL REMAIN AVAILABLE
IN THE FOLLOWING PRODUCTS:

   WMO HEADER:       AWIPS ID:
   WUUS01            PTSDY1
   WUUS02            PTSDY2
   WUUS03            PTSDY3

A SERVICE CHANGE NOTICE ...SCN05-39... PROVIDES DETAILS
ON THE TRANSITION. FOR ADDITIONAL DETAILS SEE THE FOLLOWING
WEB ADDRESS USING LOWER CASE LETTERS:
WWW.NWS.NOAA.GOV/OM/NOTIF.HTM