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WWUS20 KWNS 220028

SEL1

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ILZ000-INZ000-220700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 171

NWS STORM PREDICTION CENTER NORMAN OK

730 PM CDT WED MAY 21 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  CENTRAL AND EAST-CENTRAL ILLINOIS

  WEST-CENTRAL AND SOUTHWEST INDIANA



* EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 730 PM

  UNTIL 200 AM CDT.



* PRIMARY THREATS INCLUDE...

  ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60

STATUTE MILES EAST AND WEST OF A LINE FROM 5 MILES EAST NORTHEAST

OF BLOOMINGTON ILLINOIS TO 50 MILES SOUTHWEST OF BLOOMINGTON

INDIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



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 164...WW 165...WW

166...WW 167...WW 168...WW 169...WW 170...



DISCUSSION...WEAK WARM ADVECTION ALONG THE ERN EDGE OF THE CAP WILL

LIKELY SUSTAIN CLUSTERS OF TSTMS WHICH WILL EXHIBIT A COMBINATION OF

BOTH BACK-BUILDING AND FORWARD-PROPAGATING CHARACTERISTICS. LARGE

HAIL AND LOCALLY DAMAGING WINDS WILL BE THE PRIMARY HAZARDS WITH

THESE STORMS.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 32025.





...MEAD

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