STORM PREDICTION CENTER...NWS/NCEP...NORMAN OK
DAY 1 CONVECTIVE OUTLOOK...REF AWIPS GRAPHIC PGWE46 KWNS.
VALID 131200Z - 141200Z
NO SVR TSTM AREAS FCST.
GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 70 S MRF 25 WSW FST
45 E HOB 20 SE PVW 20 WNW CDS 25 SW LTS 55 NNE ABI 50 E SJT
25 SSE DRT.
GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 70 NE ISN 30 WNW GDV
45 E BIL 30 S COD 45 NE EVW 40 W PUC 15 S SGU 55 ENE DAG 10 SW LGB.
...CA...
UPPER LOW OFF THE ORE/CA COAST WILL DRIFT SEWD TOWARD NRN CA DURING
THE PERIOD AS HIGH LEVEL SPEED MAX DROPS SWD THROUGH THE SACRAMENTO
VALLEY INTO NRN SAN JOAQUIN VALLEY. ONGOING CONVECTION AND
WIDESPREAD PRECIPITATION WILL SERVE TO MAINTAIN MOIST BOUNDARY
LAYER...ALTHOUGH SFC DEW POINTS WILL LIKELY HOLD IN THE UPPER
40S...TO PERHAPS 50F. IT APPEARS PARTIAL SUNSHINE WILL DEVELOP BY
MID DAY ACROSS MUCH OF INTERIOR VALLEYS ALLOWING BOUNDARY LAYER
DESTABILIZATION AND SBCAPES TO APPROACH OR EXCEED 500 J/KG. THIS
SHOULD RESULT IN LOW TOPPED THUNDERSTORM DEVELOPMENT BY 20Z.
VERTICAL SHEAR PROFILES FAVOR STORM ROTATION...AND ISOLATED
SUPERCELLS MAY DEVELOP IF SUFFICIENT SUNSHINE CAN MATERIALIZE. A
FEW STORMS MAY PRODUCE MARGINALLY SEVERE HAIL...AND THERE APPEARS
TO BE AT LEAST A LOW PROBABILITY FOR TORNADOES GIVEN SUPERCELL
DEVELOPMENT. ACTIVITY SHOULD SUBSIDE WITH LOSS OF DAYTIME HEATING.
...SWRN TX...
BOUNDARY LAYER MOISTURE WILL SLOWLY INCREASE ACROSS THE EDWARDS
PLATEAU REGION OF SWRN TX AND RIO GRANDE VALLEY. WITH STRONG
SUNSHINE EXPECTED...DRY LINE MAY BECOME A FOCUS FOR ISOLATED
THUNDERSTORMS DURING THE LATE AFTERNOON/EARLY EVENING HOURS.
..DARROW.. 04/13/03
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED FOR 1300Z
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