SWODY1
SPC AC 301229
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0629 AM CST MON NOV 30 2009
VALID 301300Z - 011200Z
...NO SVR TSTM AREAS FORECAST...
...CNTRL GULF COAST...
SURFACE COLD FRONT FROM NWRN AL TO SWRN LA WILL ADVANCE EWD IN
CONCERT WITH A SHORT WAVE TROUGH FROM THE ERN GREAT LAKES TO MID-MS
RIVER VALLEY SHIFTING EWD. SHOWERS AND A FEW EMBEDDED TSTMS SHOULD
CONTINUE THROUGH MID-AFTERNOON ALONG THE SRN EXTENT OF THE FRONTAL
BOUNDARY BEFORE IT EXITS THE CNTRL GULF COAST. LATEST NAM/SREF
GUIDANCE SUGGEST MIDDLE 60S SURFACE DEW POINTS MAY REACH SERN LA AND
THE MS/AL COAST BY 18Z. IF SUFFICIENT SURFACE HEATING CAN OVERCOME A
MOIST ADIABATIC THERMODYNAMIC PROFILE /AS SAMPLED BY 12Z LCH
RAOB/...UNIDIRECTIONAL MODERATE WLYS WOULD SUPPORT POTENTIAL FOR
LOW-TOPPED LINE SEGMENTS CAPABLE OF PRODUCING GUSTY WINDS.
...WRN TX...
A SHORT WAVE TROUGH CENTERED OVER THE GULF OF CA WILL EJECT EWD
REACHING CHIHUAHUA EARLY TUE. LARGE-SCALE FORCED ASCENT WILL
INCREASE DOWNSTREAM OF THIS WAVE WITH LOWER-TROPOSPHERIC WARM/MOIST
ADVECTION STRENGTHENING ACROSS WRN/SRN TX. WEAK ELEVATED INSTABILITY
SHOULD DEVELOP THIS EVENING ACROSS FAR W TX AND FARTHER E TOWARDS
THE BIG COUNTRY/EDWARDS PLATEAU BY 12Z/TUE. GFS/NAM FORECAST
SOUNDINGS INDICATE PARCELS ROOTED BETWEEN 700-600 MB WOULD BE
MARGINALLY FAVORABLE FOR CHARGE SEPARATION. THIS SHOULD RESULT IN
SPORADIC LIGHTNING STRIKES ACCOMPANYING AN EXPANDING AREA OF
PRECIPITATION TONIGHT.
..GRAMS/EVANS.. 11/30/2009
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