SWODY1
SPC AC 111626
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1026 AM CST SUN NOV 11 2007
VALID 111630Z - 121200Z
..NO SVR TSTM AREAS FORECAST...
WESTERLY MID/UPPER LEVEL FLOW PATTERN CONTINUES ACROSS THE NATION
TODAY...WITH SERIES OF EMBEDDED SHORTWAVE TROUGHS. THESE FEATURES
ARE EXPECTED TO RESULT IN SCATTERED THUNDERSTORMS FROM PARTS OF THE
SOUTHERN PLAINS ACROSS THE OH VALLEY...AS WELL AS PORTIONS OF THE
DESERT SOUTHWEST.
..OH VALLEY...
CLUSTERS OF THUNDERSTORMS ARE ONGOING THIS MORNING FROM MO/IL INTO
IND/OH. THESE STORMS ARE NEAR NOSE OF 35-40 KNOT SOUTHWESTERLY LOW
LEVEL JET WHERE ENHANCED WARM ADVECTION AND LIFT ARE SUPPORTING
ACTIVITY. CONVECTION IS EXPECTED TO PERSIST FOR SEVERAL MORE HOURS
AND SPREAD EASTWARD INTO PARTS OF KY/OH AND PERHAPS INTO WV BEFORE
DIMINISHING LATE THIS EVENING.
..TX/OK/KS...
WATER VAPOR IMAGERY SHOWS UPPER TROUGH NEAR SOUTHWEST NM. THIS
FEATURE WILL MOVE EASTWARD AND BEGIN TO AFFECT PARTS OF THE SOUTHERN
PLAINS BY LATE TONIGHT. PLUME OF MOIST AND MARGINALLY UNSTABLE AIR
MASS IS PRESENT FROM TX INTO MO/KS WITH DEWPOINTS IN THE 60S AND LI
VALUES OF -1 TO -4. INCREASED ASCENT AHEAD OF APPROACHING TROUGH
AND CONTINUED INFLUX OF MOISTURE MAY RESULT IN ISOLATED THUNDERSTORM
DEVELOPMENT AFTER MIDNIGHT. AREAL COVERAGE OF STORMS SHOULD REMAIN
QUITE LOW AND NO SEVERE STORMS ARE ANTICIPATED.
..NV/CA...
STRONG UPPER TROUGH IS CURRENTLY APPROACHING THE SOUTHERN CA COAST.
THIS FEATURE IS EXPECTED TO SWEEP INLAND LATER TODAY AND TONIGHT.
COMBINATION OF LARGE SCALE ASCENT AND OROGRAPHIC LIFT MAY RESULT IN
ISOLATED THUNDERSTORMS OVER PARTS OF SOUTHEAST CA AND SOUTHERN
NV...PRIMARILY AFTER DARK.
.HART/JEWELL.. 11/11/2007
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