SPC AC 101638
DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1138 AM CDT SAT OCT 10 2009
VALID 111200Z - 121200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
A BROADLY CYCLONIC LARGE-SCALE REGIME WILL BE MAINTAINED OVER MUCH
OF THE CONUS THROUGH THE DAY TWO PERIOD. WITHIN THIS BROADER
PATTERN...A STRONG SHORT WAVE TROUGH WILL PROGRESS EWD FROM THE NRN
INTERMOUNTAIN REGION INTO THE NRN PLAINS. ELSEWHERE...A LOWER
LATITUDE IMPULSE WILL WEAKEN WHILE MOVING FROM THE LOWER CO
VALLEY/BAJA INTO THE SRN PLAINS. AT THE SURFACE...PRIMARY
BAROCLINIC ZONE INITIALLY FROM SRN GA/NRN FL WSWWD INTO THE NWRN
GULF OF MEXICO WILL RETREAT SLOWLY NWD THROUGH THE PERIOD.
...SRN GA/NRN FL...
DIURNAL STORMS ARE EXPECTED TO INCREASE IN COVERAGE ALONG AND S OF
SURFACE BOUNDARY WITHIN A MOIST...UNSTABLE AIR MASS WITH MLCAPE OF
1000-1500 J/KG. GENERALLY WEAK VERTICAL SHEAR AND LAPSE RATES
SHOULD LIMIT THE POTENTIAL FOR ANY SEVERE WEATHER.
...SRN PLAINS INTO CNTRL GULF COAST STATES...
MASS RESPONSE TO SHORT WAVE TROUGH MOVING THROUGH NRN MEXICO/SRN
ROCKIES WILL SERVE TO ENHANCE SWLY LOW-LEVEL FLOW ABOVE SHALLOW
FRONTAL INVERSION LATE SUNDAY AFTERNOON INTO SUNDAY NIGHT.
ASSOCIATED INCREASE IN MOIST AND THERMAL ADVECTIONS ALONG THIS
INTENSIFYING AIR STREAM WILL CONTRIBUTE TO DECREASING STABILITY AND
THE DEVELOPMENT OF SCATTERED...ELEVATED TSTMS DURING THE LATTER HALF
OF THE FORECAST PERIOD. NO SEVERE WEATHER IS EXPECTED.
..MEAD.. 10/10/2009
CLICK TO GET WUUS02 PTSDY2 PRODUCT
NOTE: THE NEXT DAY 2 OUTLOOK IS SCHEDULED BY 0600Z
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