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WWUS20 KWNS 241932

SEL6

SPC WW 241932

MNZ000-NEZ000-SDZ000-250200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 216

NWS STORM PREDICTION CENTER NORMAN OK

235 PM CDT MON MAY 24 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       EXTREME WEST CENTRAL MINNESOTA

       NORTH CENTRAL NEBRASKA

       EASTERN SOUTH DAKOTA



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 235 PM UNTIL 900

PM CDT.



TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE

MILES EAST AND WEST OF A LINE FROM 45 MILES NORTHEAST OF ABERDEEN

SOUTH DAKOTA TO 15 MILES WEST OF BURWELL NEBRASKA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU6).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



OTHER WATCH INFORMATION...CONTINUE...WW 212...WW 213...WW

214...WW 215...



DISCUSSION...ISOLATED STORMS CONTINUE TO DEVELOP IN THE OPEN WARM

SECTOR...WITH CONVECTION LIKELY AIDED BY THE APPROACH OF A WEAK LEAD

SHORTWAVE TROUGH IN ADVANCE OF THE PRIMARY SYSTEM OVER THE CENTRAL

HIGH PLAINS.  GIVEN THE PRESENCE OF MODERATE INSTABILITY AND

EFFECTIVE BULK SHEAR NEAR 40 KT...THE ENVIRONMENT WILL REMAIN

FAVORABLE FOR SUPERCELLS THROUGH THE AFTERNOON.  THE STRONGEST

STORMS COULD PRODUCE A COUPLE OF TORNADOES...ALONG WITH LARGE HAIL

AND DAMAGING WINDS.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 21040.





...THOMPSON

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