

968 

WWUS20 KWNS 020227

SEL1

SPC WW 020227

KSZ000-NEZ000-OKZ000-TXZ000-020900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 41

NWS STORM PREDICTION CENTER NORMAN OK

925 PM CDT THU APR 1 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       MUCH OF CENTRAL KANSAS

       PARTS OF SOUTH CENTRAL NEBRASKA

       PARTS OF NORTHWEST OKLAHOMA

       PARTS OF EASTERN TEXAS PANHANDLE



EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 925 PM

UNTIL 400 AM CDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60

STATUTE MILES EAST AND WEST OF A LINE FROM 5 MILES NORTH

NORTHWEST OF GRAND ISLAND NEBRASKA TO 55 MILES SOUTH OF GAGE

OKLAHOMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH

AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR

THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS

AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



DISCUSSION...AS THE STRONG COLD FRONT HAS INTERSECTED THE DRY

LINE...THUNDERSTORMS ARE RAPIDLY DEVELOPING. WITH A VERY STRONG

UPPER TROUGH AND ASSOCIATED WIND FIELD MOVING EWD INTO HIGH

PLAINS...THE MARGINAL MOISTURE/INSTABILITY EXPECTED TO BE SUFFICIENT

FOR A FEW THUNDERSTORMS TO BECOME SEVERE.  PRIMARY THREAT WILL BE

LARGE HAIL AND LOCALLY DAMAGING WINDS. GIVEN THE STRENGTH OF THE

SYSTEM THERE IS THE POSSIBILITY OF A FEW ROTATING STORMS ENHANCING

THE SEVERE THREAT PRIOR BECOMING A MORE LINEAR MODE OVERNIGHT AS THE

STORMS MOVE EWD.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM

MOTION VECTOR 22035.





...HALES

