SWODY2
SPC AC 041726
DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1226 PM CDT SAT SEP 04 2010
VALID 051200Z - 061200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
A RELATIVELY STRONG UPPER TROUGH /WITH -22 C AT 500 MB/ WILL
CONTINUE TO MOVE SEWD ACROSS THE PACIFIC NW AND NRN
ROCKIES...EMERGING INTO THE CNTRL/NRN HIGH PLAINS BY 12Z MON. AT THE
SURFACE...A COLD FRONT WILL EXTEND FROM SERN MT/ERN WY SWWD INTO THE
GREAT BASIN AT 00Z. MEANWHILE...A BROAD AREA OF LOW PRESSURE WILL
DEEPEN ACROSS THE PLAINS...WITH A LOW CENTER ACROSS WRN NEB SUN
AFTERNOON. GIVEN LOW LEVEL TRAJECTORIES OUT OF THE SERN U.S.
HIGH...MOISTURE AND INSTABILITY WILL BE QUITE LIMITED ACROSS THE NRN
HIGH PLAINS. ELSEWHERE...INSTABILITY WILL REMAIN OVER THE FL
PENINSULA WITH A FEW AFTERNOON STORMS AS WELL AS ALONG THE WRN AND
CNTRL GULF COAST WITH ISOLATED SEA-BREEZE CONVECTION POSSIBLE.
...SERN MT...NRN WY...WRN SD...
SCATTERED STORMS WILL LIKELY BE ONGOING SUN MORNING ACROSS SRN MT
NEAR A DEVELOPING COLD FRONT. SURFACE CONVERGENCE WILL INCREASE
DURING THE DAY OVER SRN MT AND NRN WY...WHILE LOW LEVEL LAPSE RATES
STEEPEN AND MARGINAL INSTABILITY DEVELOPS AHEAD OF THE FRONT.
FORECAST SOUNDINGS SHOW RELATIVELY COOL PROFILES ALOFT AND DEEP
LAYER SHEAR FAVORABLE FOR SUPERCELLS...AND THIS WILL FAVOR AT LEAST
MARGINALLY SEVERE HAIL. A FEW SEVERE WIND GUSTS WILL BE INCREASINGLY
LIKELY BY LATE IN THE DAY OVER NERN WY...SERN MT AND THE WRN DAKOTAS
AS PEAK HEATING IS REACHED AND CONVECTIVE OUTFLOWS MERGE.
..JEWELL.. 09/04/2010
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