Saturday, October 27, 2007

DAY2SVR: Nws Storm Prediction Center Norman Ok

ACUS02 KWNS 270447
SWODY2
SPC AC 270445

DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1145 PM CDT FRI OCT 26 2007

VALID 281200Z - 291200Z

..NO SVR TSTM AREAS FORECAST...

..SYNOPSIS...
IN THE WAKE OF A DEEP SURFACE CYCLONE AND ASSOCIATED MID-LEVEL SHORT
WAVE TROUGH LIFTING THROUGH/NORTHEAST OF THE CANADIAN
MARITIMES...BROAD UPPER TROUGHING IS FORECAST TO PERSIST ACROSS THE
NORTHEAST QUARTER OF THE NATION SUNDAY. AT THE SAME TIME...UPPER
RIDGING IS PROGGED TO GENERALLY REMAIN STRONG ACROSS THE WESTERN
STATES. THIS PATTERN SHOULD MAINTAIN A DRY/STABLE THERMODYNAMIC
STRATIFICATION ACROSS MUCH OF THE NATION. AND...CONVECTIVE
POTENTIAL IS EXPECTED TO BE MINIMAL THROUGH THIS FORECAST PERIOD.

..FLORIDA...
MODELS INDICATE THAT A PREVIOUSLY STALLED LOW-LEVEL FRONTAL ZONE
OVER THE NORTHERN PENINSULA WILL ADVANCE THROUGH MUCH OF THE CENTRAL
PENINSULA DURING THIS PERIOD. ALONG AND SOUTH OF THIS FEATURE...A
MOIST EASTERLY LOW-LEVEL FLOW REGIME IS EXPECTED TO PERSIST...AND
THE BOUNDARY LAYER COULD BECOME WEAKLY UNSTABLE WITH DAYTIME
HEATING. THUS...A FEW THUNDERSTORMS APPEAR POSSIBLE SUNDAY.
BUT...WEAK MID-LEVEL LAPSE RATES/CAPPING MID-LEVEL LAYERS EVIDENT IN
FORECAST SOUNDINGS ACROSS THIS REGION SUGGEST THAT PROBABILITIES MAY
BE NEAR MINIMUM THRESHOLDS FOR THUNDERSTORM OUTLOOK.

.KERR.. 10/27/2007

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