STORM PREDICTION CENTER...NWS/NCEP...NORMAN OK
DAY 3 CONVECTIVE OUTLOOK...REF AWIPS GRAPHIC PGWK48 KWNS.
VALID 091200-101200
THERE IS A SLIGHT RISK OF SEVERE TSTMS FOR THE LOWER MO/MID MS
VALLEY REGION.
...SYNOPSIS...
A GENERAL CONSENSUS OF 00Z MODEL FORECASTS SUGGESTS THAT MID LEVEL
HEIGHTS WILL RISE OVER THE FOUR CORNERS...ALLOWING A SHORTWAVE
TROUGH TO DIG SEWD FROM THE NEB/SD AREA EARLY IN THE PERIOD TO THE
MID MS VALLEY LATE. AT THE SURFACE...A REMNANT OF A LEE CYCLONE
ACROSS THE WRN KS AREA SHOULD DEVELOP EWD TOWARD MO AS THE MID
LEVEL TROUGH AMPLIFIES TOWARD THE MS VALLEY. A PERSISTENT INFLUX
OF BOUNDARY LAYER DEW POINTS IN THE 70S AND STRONG DAYTIME HEATING
WILL SUPPORT STRONG INSTABILITY IN THE WARM SECTOR IN ADVANCE OF
THE MID LEVEL TROUGH/SURFACE LOW. THE APPROACHING MID LEVEL TROUGH
WILL ALSO CONTRIBUTE TO SUFFICIENT DEEP LAYER FLOW/SHEAR FOR
ORGANIZED SEVERE STORMS. THE PATTERN APPEARS FAVORABLE FOR ONE OR
MORE MCS/S TO FORM AND MOVE E/SEWD ACROSS THE SLIGHT RISK AREA WITH
AN ATTENDANT SEVERE THUNDERSTORM THREAT.
ELSEWHERE...ANOTHER NRN STREAM SYSTEM WILL MOVE ACROSS THE DAKOTAS
WITH THE THREAT FOR THUNDERSTORMS. THE DEGREE OF INSTABILITY AND
SIZE OF ANY UNSTABLE WARM SECTOR ARE IN QUESTION GIVEN THE
LIKELIHOOD OF CONVECTIVE CLUSTERS S OF THIS AREA...THUS A SLIGHT
RISK WILL NOT BE INCLUDED FOR THIS AREA AT THIS TIME.
..THOMPSON.. 07/07/03
NOTE: THE NEXT DAY 3 OUTLOOK IS SCHEDULED FOR 1200Z
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