

000 

WWUS20 KWNS 312220

SEL5

SPC WW 312220

KSZ000-NEZ000-010400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 315

NWS STORM PREDICTION CENTER NORMAN OK

520 PM CDT THU MAY 31 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHEAST KANSAS

       SOUTHEAST NEBRASKA



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 520 PM UNTIL

1100 PM 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 65

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

NORTHWEST OF BEATRICE NEBRASKA TO 25 MILES SOUTH SOUTHEAST OF

CONCORDIA KANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



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.



OTHER WATCH INFORMATION...CONTINUE...WW 312...WW 313...WW 314...



DISCUSSION...SUPERCELL THUNDERSTORM IS MOVING EASTWARD ALONG THE

NEB/KS BORDER...WHILE ISOLATED STORMS FORM OUT AHEAD IN

MOIST/UNSTABLE AIR MASS.  STRONGEST CELLS WILL POSE A THREAT OF

LOCALLY DAMAGING WINDS AND LARGE HAIL UNTIL MID EVENING AS DIURNAL

COOLING WEAKENS STORMS.



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 500. MEAN STORM

MOTION VECTOR 27030.





...HART

