ZCZC SPCSWODY1 ALL
ACUS01 KWNS 210525
SPC AC 210525

DAY 1 CONVECTIVE OUTLOOK  
NWS STORM PREDICTION CENTER NORMAN OK
1125 PM CST SAT DEC 20 2003

VALID 211200Z - 221200Z

GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 20 NNE PRC 30 NNE IGM
40 WSW SGU 45 W U24 30 WSW PUC 35 W ASE 55 W COS 20 SSW PUB 50 SW
CAO 25 WNW TCC 45 NE 4CR 35 SW GUP 20 NNE PRC.

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
UPPER PATTERN WILL BE FAIRLY ZONAL AT THE START OF THE
PERIOD...TRANSITIONING INTO A MORE AMPLIFIED PATTERN WITH TIME.
UPPER LOW CURRENTLY ACROSS CNTRL CA WILL TAKE AN E/SEWD TRACK INTO
THE FOUR CORNERS REGION TODAY. AN UPPER RIDGE WILL AMPLIFY ACROSS
THE WRN CONUS BEHIND THIS SYSTEM. AT LOWER LEVELS...SFC LOW PRESSURE
WILL FORM ACROSS THE SRN HIGH PLAINS AND THEN MOVE SEWD ACROSS THE
TX PANHANDLE TONIGHT. SLY RETURN FLOW WILL CONTINUE ACROSS THE SRN
PLAINS.

...FOUR CORNERS/SRN ROCKIES...
COOLING TEMPERATURES ALOFT ASSOCIATED WITH THE UPPER TROUGH WILL
STEEPEN LAPSE RATES SUFFICIENTLY FOR LIGHTNING. ISOLATED LIGHTNING
WILL BE LIKELY ALONG AND NORTH OF THE MAIN VORT MAX...MAINLY ACROSS
NRN AZ/SRN UT EWD INTO SRN CO/NRN NM WHERE POINT FORECAST SOUNDINGS
INDICATE PROFILES WITH MARGINAL ELEVATED INSTABILITY.  

...SRN PLAINS...
MOISTURE WILL INCREASE ACROSS ERN TX TODAY AND NWD TOWARD SWRN
MO...WITH SURFACE DEWPOINTS IN THE LOWER 50S EXTENDING AS FAR NORTH
AS ERN OK/WRN AR BY 12Z MONDAY. AN INCREASE IN LARGE SCALE LIFT AND
WARM AIR ADVECTION IS EXPECTED ACROSS THE REGION. HOWEVER...A
SIGNIFICANT MID LAYER CAPPING INVERSION SHOULD INHIBIT TSTMS FROM
DEVELOPING THIS FORECAST PERIOD.

..TAYLOR/PETERS.. 12/21/2003

...NOTICE...
FOR USERS DECODING THE POINTS PARAGRAPH HEREIN...LATITUDE AND
LONGITUDE POINTS FOR THE CATEGORICAL AND PROBABILISTIC OUTLOOK
GRAPHICS ALSO ARE LOCATED IN A SEPARATE PRODUCT UNDER THE WMO
HEADINGS WUUS01 PTSDY1...WUUS02 PTSDY2...AND WUUS03 PTSDY3.  THE
INCLUSION OF POINTS IN THIS PRODUCT WILL EVENTUALLY BE DISCONTINUED.

$$