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Severe Thunderstorm Watch 171
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WW0171 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Low
Severe Hail 2"+ Hail
Moderate Moderate

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL1

   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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Page last modified: May 22, 2014
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