SWODY1
SPC AC 211921
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0121 PM CST FRI DEC 21 2007
VALID 212000Z - 221200Z
..NO SVR TSTM AREAS FORECAST...
..SWRN U.S...
SIMILAR CONVECTIVE/TSTM DEVELOPMENT IS EXPECTED TO OCCUR DOWNSTREAM
FROM ERN AZ INTO WRN/CENTRAL NM THIS AFTERNOON AND EVENING.
REGIONAL RADARS/LIGHTNING DATA SHOWED TSTMS LOCATED OVER ERN AZ AND
FAR W CENTRAL NM ALONG LEADING EDGE OF STRONGER FORCING FOR ASCENT
AND MID LEVEL COOLING ATTENDANT TO THE UPPER TROUGH. THIS COOLING
COMBINED WITH SURFACE HEATING HAS RESULTED IN STEEP LOW TO MID LEVEL
LAPSE RATES ACROSS THE SWRN STATES. THUS...ADDITIONAL TSTM
DEVELOPMENT IS EXPECTED AS THE SRN STREAM TROUGH TRACKS EWD INTO
NM...WITH THE TSTM POTENTIAL GREATEST IN VICINITY OF THE HIGHER
TERRAIN WHERE OROGRAPHIC UPLIFT WILL AID IN TSTM FORMATION.
SOUNDINGS CONTINUE TO SUGGEST THAT ACTIVITY WILL BE DEEP ENOUGH FOR
CHARGE SEPARATION/THUNDER THROUGH EARLY TONIGHT INTO WRN/CENTRAL NM.
.PETERS.. 12/21/2007
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