

031 

WWUS20 KWNS 141948

SEL8

SPC WW 141948

IAZ000-150200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 168

NWS STORM PREDICTION CENTER NORMAN OK

250 PM CDT SAT APR 14 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHWEST IOWA



EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 250 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 55 STATUTE

MILES EAST AND WEST OF A LINE FROM 40 MILES EAST SOUTHEAST OF

SHENANDOAH IOWA TO 60 MILES NORTHEAST OF OMAHA NEBRASKA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU8).



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 165...WW 166...WW 167...



DISCUSSION...A LARGE SUPERCELL STORM HAS FORMED OVER SOUTHWEST IA

AND IS EXPECTED TO TRACK EASTWARD ROUGHLY ALONG WARM FRONT FOR NEXT

FEW HOURS.  OTHER LESS-INTENSE STORMS MAY ALSO SPREAD OUT OF EASTERN

NEB INTO WESTERN IA DURING THE NEXT FEW HOURS.  TORNADOES...LARGE

HAIL...AND DAMAGING WINDS WILL BE POSSIBLE WITH THIS ACTIVITY.



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 25030.





...HART

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