[SWODY1] SWODY1

[Severe Weather Outlook Day 1]

ACUS01 KWNS 211956
SWODY1
SPC AC 211954

DAY 1 CONVECTIVE OUTLOOK  
NWS STORM PREDICTION CENTER NORMAN OK
0154 PM CST WED DEC 21 2005

VALID 212000Z - 221200Z

GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 80 NNW UIL 20 NNW HQM
25 E ONP 30 NNE 4BK 35 E ACV 10 SE MHS 70 NW RNO 10 ENE TVL 55 WNW
BIH FAT 40 SW MRY.

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
PROGRESSIVE UPPER AIR PATTERN CONTINUES AS LA/NWRN GULF TROUGH TURNS
EWD TO CROSS MS DELTA AND ERN GULF COAST REGIONS.  ASSOCIATED SFC
CYCLOGENESIS WILL REMAIN WELL OFFSHORE OVER GULF...AND REINFORCEMENT
OF CONTINENTAL RIDGING OVER GULF COAST SHOULD PRECLUDE SUFFICIENT
LOW LEVEL MOISTENING FOR THUNDER OVER LAND.  FARTHER W...MEAN TROUGH
OVER NERN PACIFIC WILL CONTINUE WITH SHORTWAVES EJECTING NEWD/ENEWD
TOWARD W COAST AND BC. SHORTWAVE PERTURBATION NOW EVIDENT OVER NRN
CA IS EXPECTED TO MOVE FARTHER INLAND AND WEAKEN THROUGH REMAINDER
PERIOD AS IT APCHS MEAN RIDGE POSITION.  PORTIONS OF UPSTREAM TROUGH
- NOW EVIDENT IN MOISTURE CHANNEL IMAGERY OFFSHORE NRN CA/ORE...WILL
MOVE INLAND OVERNIGHT.

...W COAST SATES...
FLARE-UP OF ISOLATED LIGHTNING STRIKES PAST 1-2 HOURS IS RELATED TO
MARGINALLY SUFFICIENT DESTABILIZATION OF LOW-MIDLEVEL LAPSE RATES IN
ZONE OF LARGE SCALE ASCENT...JUST AHEAD OF SHORTWAVE TROUGH.  AFTER
THIS ACTIVITY PASSES...EXPECT RELATIVE LULL BEFORE WAA PLUME
ASSOCIATED WITH UPSTREAM TROUGH MOVES ASHORE THIS EVENING AND INLAND
TONIGHT.  ISOLATED TO WIDELY SCATTERED TSTMS ARE POSSIBLE WITH
ASSOCIATED WEAKLY CAPPED AND WEAKLY BUOYANT AIR MASS...WITH MUCAPES
GENERALLY UNDER 300 J/KG MOST AREAS.  WITH BOTH TSTM REGIMES...TSTM
POTENTIAL SHOULD DIMINISH WITH EWD EXTENT THROUGH SIERRA NV RANGE
AND INTO NV...BECAUSE OF DOWNSLOPING EFFECTS AND MORE STABLE INFLOW
LAYER AIR MASS.

..EDWARDS.. 12/21/2005

...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