[SWODY1] SWODY1

[Severe Weather Outlook Day 1]

ACUS01 KWNS 220048
SWODY1
SPC AC 220046

DAY 1 CONVECTIVE OUTLOOK  
NWS STORM PREDICTION CENTER NORMAN OK
0646 PM CST WED DEC 21 2005

VALID 220100Z - 221200Z

GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 55 NNW UIL HQM 40 WSW
PDX 25 ENE 4BK 25 E ACV 30 S MHS 70 SSW AAT 20 SW RNO 40 NE FAT PRB
100 W VBG.

...NO SVR TSTM AREAS FORECAST...

...PACIFIC COASTAL STATES...
LONG WAVE TROUGH WAS LOCATED OFF THE PACIFIC NW COAST THIS
EVENING...LIFTING NEWD TOWARD BRITISH COLUMBIA. A STRONG SHORTWAVE
TROUGH WAS LOCATED IN THE SRN PORTION OF THIS TROUGH...APPROXIMATELY
170 MI WEST OF UKI AT 00Z. THIS SYSTEM IS FORECAST TO MOVE INTO NRN
CA OVERNIGHT. EVENING SOUNDING AT VANDENBERG AIR FORCE BASE SHOWED
WEAK INSTABILITY EXISTED BETWEEN 600 AND 300 MB. THIS INSTABILITY
COMBINED WITH DEEP SWLY TROPOSPHERIC WINDS AND LARGE SCALE ASCENT
WERE SUFFICIENT FOR A FEW THUNDERSTORMS OVER THE SIERRAS. CONVECTION
SHOULD CONTINUE OVERNIGHT...THOUGH GRADUALLY LOWERING EQUILIBRIUM
LEVEL HEIGHTS MAY RESULT IN THE CONVECTIVE DEPTH TO BECOME TOO
SHALLOW FOR LIGHTING. THERE IS ALSO A LOW POTENTIAL FOR A COUPLE OF
LIGHTNING STRIKES ALONG THE ORE/WA COAST OVERNIGHT...AS STRONG
ENVIRONMENTAL WINDS VEER FROM SLY TO WSWLY...STRENGTHENING THE
UPSLOPE LIFT.

..IMY.. 12/22/2005

...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