

382 

WWUS20 KWNS 240359

SEL7

SPC WW 240359

IAZ000-KSZ000-MOZ000-NEZ000-240900-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 87

NWS STORM PREDICTION CENTER NORMAN OK

1100 PM CDT FRI APR 23 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHWEST IOWA

       FAR NORTHEAST KANSAS

       NORTHEAST MISSOURI

       EASTERN NEBRASKA



EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 1100 PM

UNTIL 400 AM CDT.



TORNADOES...HAIL TO 1.5 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 60 STATUTE

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

NEBRASKA TO 40 MILES EAST SOUTHEAST OF KANSAS CITY MISSOURI.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU7).



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 82...WW 83...WW 84...WW

85...WW 86...



DISCUSSION...SUSTAINED STORMS/POSSIBLE SUPERCELLS EXPECTED TO

CONTINUE FORMING IN CONFLUENCE ZONE S OF NW/SE WARM FRONT ACROSS SW

IA/N CNTRL MO... WITH ACTIVITY POSSIBLY ENHANCED BY SHORTWAVE

IMPULSE NOW MOVING NNE ACROSS ERN KS.  ENHANCED LOW LVL DIRECTIONAL

SHEAR AND MOISTURE AXIS NEAR WARM FRONT...IN ADDITION TO 50 KT SLY

LLJ...SUGGEST POTENTIAL FOR TORNADOES...SVR HAIL AND WIND AS STORMS

CROSS THE BOUNDARY.



AVIATION...TORNADOES AND 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

500. MEAN STORM MOTION VECTOR 19035.





...CORFIDI

