[SWODY1] SWODY1

[Severe Weather Outlook Day 1]

ACUS01 KWNS 010043
SWODY1
SPC AC 010042

DAY 1 CONVECTIVE OUTLOOK  
NWS STORM PREDICTION CENTER NORMAN OK
0642 PM CST SAT DEC 31 2005

VALID 010100Z - 011200Z

GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 20 NNW BLI 25 SSW SEA
30 SE SLE 15 S MFR 30 ENE MHS 50 S REO 35 N EKO 50 NNE ELY 50 N P38
55 NNE DRA 45 ESE BIH 20 WNW FAT 30 S SFO 60 W SFO.

...NO SVR TSTM AREAS FORECAST...

...PACIFIC COAST/INTERMOUNTAIN WEST...
WATER VAPOR IMAGERY CURRENTLY SHOWS AN UPPER-LEVEL TROUGH ORIENTED
FROM NORTH TO SOUTH ALONG THE WEST COAST. THIS TROUGH IS FORECAST TO
DAMPEN OUT AND MOVE INTO THE INTERMOUNTAIN WEST TONIGHT. THIS
COMBINED WITH DECREASING INSTABILITY WILL ALLOW THE CONVECTION
CURRENTLY ONGOING IN CNTRL CA AND ERN NV TO SLOWLY DIMINISH. FURTHER
WEST IN THE ERN PACIFIC...ANOTHER UPPER-TROUGH IS FORECAST TO
APPROACH THE COASTAL AREAS LATE TONIGHT AND BECOME NEGATIVELY
TILTED. AS A RESULT...A STRONG BAND OF ASCENT AHEAD OF THE WAVE WILL
MOVE INTO THE COASTAL AREAS OF ORE AND WA LIKELY RESULTING IN A
ROUND OF THUNDERSTORMS LATE. ALTHOUGH FORECAST SOUNDINGS SHOW
INCREASING VERTICAL SHEAR AS THE TROUGH APPROACHES...THE SHEAR AND
INSTABILITY COMBINATIONS SHOULD BE TOO MARGINAL FOR THE DEVELOPMENT
OF SEVERE STORMS.

ELSEWHERE...THUNDERSTORM ACTIVITY IS NOT EXPECTED ACROSS THE CONUS.

..BROYLES.. 01/01/2006

...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