SWODY2
SPC AC 201725
DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1225 PM CDT SAT OCT 20 2007
VALID 211200Z - 221200Z
..NO SVR TSTM AREAS FORECAST...
..CNTRL GULF COAST STATES...
A WRN U.S. UPPER-LEVEL TROUGH WILL AMPLIFY AND MOVE EWD INTO THE
PLAINS STATES SUNDAY. AHEAD OF THE APPROACHING TROUGH...STRONG
MOISTURE ADVECTION WILL OCCUR ACROSS THE LOWER MS VALLEY AND TN
VALLEY AS A LOW-LEVEL JET DEVELOPS. INSTABILITY WILL INCREASE AS
DEWPOINTS RISE INTO THE 60S F SUNDAY NIGHT. ALTHOUGH THE STRONGER
LARGE-SCALE ASCENT WITH THE UPPER-LEVEL TROUGH WILL REMAIN WEST OF
THE REGION...WARM ADVECTION MAY RESULT IN SCATTERED THUNDERSTORM
ACTIVITY DURING THE OVERNIGHT PERIOD. FORECAST SOUNDINGS OVERNIGHT
IN LA...MS AND AL SHOW STRONG LOW-LEVEL SHEAR PROFILES WHICH MAY
RESULT IN A FEW ROTATING STORMS WITH A MARGINAL WIND DAMAGE OR
TORNADO THREAT. THE THREAT SHOULD REMAIN ISOLATED WITH THE GREATEST
POTENTIAL IN THE 06Z TO 12Z TIMEFRAME.
.BROYLES.. 10/20/2007
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