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WWUS20 KWNS 210115

SEL1

SPC WW 210115

IAZ000-KSZ000-MOZ000-NEZ000-210800-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 361

NWS STORM PREDICTION CENTER NORMAN OK

810 PM CDT SUN JUN 20 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHWESTERN IOWA

       NORTHEASTERN KANSAS

       NORTHWESTERN MISSOURI

       EASTERN NEBRASKA



EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 810 PM UNTIL

300 AM CDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80

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

NORTHWEST OF TEKAMAH NEBRASKA TO 35 MILES WEST SOUTHWEST OF

OLATHE KANSAS.  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 357...WW 358...WW

359...WW 360...



DISCUSSION...BOW ECHO LOCATED NEAR THE KS/NEB...WEST OF CNK...IS

EXPECTED TO MOVE EWD AT 35-40 KT. STRONG INSTABILITY AND 40 KT DEEP

LAYER SHEAR WILL SUPPORT DAMAGING WINDS FROM 60-80 MPH. A BRIEF

TORNADO IS POSSIBLE NEAR THE BOW HEAD FOR THE NEXT HOUR OR

SO...THOUGH THE STRONG OUTFLOW FROM STORMS INDICATES THE THREAT

SHOULD BE LOW. ALSO...AS THE LOW LEVEL JET STRENGTHENS...ELEVATED

STORMS ARE LIKELY TO BECOME MORE WIDESPREAD ACROSS PORTIONS OF ERN

NE AND SWRN IA. LARGE HAIL WILL BE THE MAIN THREAT WITH THESE

STORMS.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70

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

MOTION VECTOR 26035.





...IMY

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