SPC AC 250645
DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0145 AM CDT THU AUG 25 2011
VALID 271200Z - 281200Z
...SYNOPSIS...
AN UPPER HIGH WILL REMAIN CENTERED OVER THE FOUR CORNERS
REGION...WITH NWLY FLOW AROUND THE NRN PERIPHERY FROM THE NRN
ROCKIES INTO THE NRN PLAINS AND INTO THE UPPER AND MIDDLE MS VALLEY.
A SURFACE HIGH WILL BE LOCATED OVER THE UPPER MS VALLEY...WITH
RELATIVELY DRY AIR OVER MUCH OF THE CNTRL U.S. DESPITE
THIS...THUNDERSTORMS ARE STILL ANTICIPATED FOR PORTIONS OF THE NRN
HIGH PLAINS WHERE STEEP LAPSE RATES WILL EXIST AS WELL AS MODERATE
FLOW. ELSEWHERE...IRENE WILL CONTINUE NWD OFF THE MID ATLANTIC
COAST...POSSIBLY AFFECTING ERN NC.
...NRN PLAINS...
A WEAK LEE TROUGH WILL FORM BY AFTERNOON...WHICH WILL LIKELY BE THE
FOCUS FOR ISOLATED STRONG TO SEVERE THUNDERSTORMS CAPABLE OF LARGE
HAIL AND GUSTY WINDS. A RELATIVELY NARROW PLUME OF THETA-E WILL BE
MAINTAINED BY A SELY LOW LEVEL JET WHICH WILL STRENGTHEN DURING THE
EVENING. THIS SHOULD MAINTAIN A THREAT OF ISOLATED SEVERE INTO THE
DAKOTAS AND NRN NEB OVERNIGHT...BUT SRN EXTENT WILL BE LIMITED BY
CAPPING.
..JEWELL.. 08/25/2011
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NOTE: THE NEXT DAY 3 OUTLOOK IS SCHEDULED BY 0730Z
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