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906 

WWUS20 KWNS 032324

SEL1

SPC WW 032324

NEZ000-SDZ000-040600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 441

NWS STORM PREDICTION CENTER NORMAN OK

620 PM CDT SAT JUL 3 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTH CENTRAL NEBRASKA

       EASTERN AND SOUTHERN SOUTH DAKOTA



EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 620 PM

UNTIL 100 AM CDT.



HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 75

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 35 MILES NORTH OF

ABERDEEN SOUTH DAKOTA TO 25 MILES EAST OF BURWELL NEBRASKA.  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.



OTHER WATCH INFORMATION...CONTINUE...WW 439...WW 440...



DISCUSSION...INTENSE COMPLEX OF STORMS NEAR THE SD/NEB BORDER...EAST

OF CDR... ARE EXPECTED TO MOVE/SPREAD ENEWD ACROSS PORTIONS OF

CENTRAL AND EVENTUALLY ERN SD LATER THIS EVENING. THIS COMPLEX OF

STORMS IS EXPECTED TO EVOLVE INTO A LINEAR SYSTEM...WITH WIND DAMAGE

THE MAIN THREAT. ALSO...WITH THE COLD FRONT IN THE AREA AND UPPER

IMPULSE APPROACHING FROM THE WEST...OTHER STORMS ARE EXPECTED TO

DEVELOP. THE WARM AND VERY UNSTABLE ENVIRONMENT WILL BE FAVORABLE

FOR THESE STORMS TO PRODUCE WIND DAMAGE AND HAIL.



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

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 25025.





...IMY

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