

000 

WWUS20 KWNS 022227

SEL4

SPC WW 022227

NEZ000-030500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 104

NWS STORM PREDICTION CENTER NORMAN OK

525 PM CDT MON APR 2 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHERN AND CENTRAL NEBRASKA



EFFECTIVE THIS MONDAY AFTERNOON FROM 525 PM UNTIL MIDNIGHT CDT.



HAIL TO 1.5 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 75

STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH

NORTHEAST OF AINSWORTH NEBRASKA TO 20 MILES WEST SOUTHWEST OF

NORTH PLATTE NEBRASKA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).



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...TSTMS ARE INCREASING IN WRN NEB...IN EXIT REGION OF JET

STREAK NOW CROSSING THE CNTRL RCKYS.  STORMS EXPECTED TO CONTINUE TO

DEVELOP AND SPREAD EWD AHEAD OF UPR SYSTEM.  STEEP LOW TO MID LEVEL

LAPSE RATES...NE/SW AXIS OF ASCENT...AND STRENGTHENING MID LEVEL

WIND FIELD SUGGEST THAT ACTIVITY MAY BECOME BETTER ORGANIZED AND

POSE A THREAT FOR DAMAGING WIND AND...WITH TIME...PERHAPS SEVERE

HAIL.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 400. MEAN STORM

MOTION VECTOR 27045.





...CORFIDI

