SPC AC 250724
DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0124 AM CST WED NOV 25 2009
VALID 271200Z - 281200Z
...SYNOPSIS/FCST...
DEEP UPR TROUGH EXPECTED ALONG THE ERN SEABOARD EARLY ON FRIDAY WILL
CONTINUE ENE OFF THE NEW ENGLAND CST THROUGH FRIDAY NIGHT. NEXT IN
A SERIES OF ADVERTISED UPR SYSTEMS WILL EVOLVE OVER THE WRN CONUS
DURING THE DAY 3 PD. THE UPR TROUGH IS FCST TO SPLIT WITH NRN
STREAM ENERGY MOVING TOWARD THE NRN ROCKIES AND A SRN STREAM IMPULSE
LIKELY CLOSING INTO A LOW OVER SRN CA BY EARLY SATURDAY.
DOWNSTREAM...A SUB-TROPICAL WAVE WILL EJECT ACROSS NRN MEXICO AND
INTO THE SRN PLAINS.
STRONG SFC ANTICYCLONE BUILDING SEWD IN WAKE OF THE ERN STATES
SYSTEM WILL FORCE A CP AIR MASS WELL INTO THE SRN GULF OF MEXICO BY
FRIDAY AFTN. AS THE SUB-TROPICAL IMPULSE TRANSLATES TOWARD THE SRN
PLNS...WEAK RETURN FLOW IS EXPECTED INTO PARTS OF CNTRL/SRN
TX...WITH ONLY A PARTIALLY-MODIFIED GULF BOUNDARY LAYER ADVECTING
INLAND. THUS...ONLY ISOLD AND SUB-SVR TSTMS CAN BE EXPECTED OVER
PORTIONS OF CNTRL/SRN TX FRIDAY AFTN/NIGHT IN ASSOCIATION WITH THE
UPR WAVE.
OTHER ISOLD TSTMS MAY ACCOMPANY THE UPR TROUGH ACROSS THE
INTERMOUNTAIN W AMIDST STEEP LAPSE RATES AND FAVORABLE
OROGRAPHIC/DYNAMIC UVV.
..RACY.. 11/25/2009
NOTE: THE NEXT DAY 3 OUTLOOK IS SCHEDULED BY 0830Z
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