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Severe Thunderstorm Watch 350
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WW0350 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Low
Severe Hail 2"+ Hail
Moderate Low

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL0
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 350
   NWS STORM PREDICTION CENTER NORMAN OK
   125 PM CDT MON JUN 8 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          NORTHEAST ILLINOIS
          SOUTHEAST WISCONSIN
          LAKE MICHIGAN
   
   EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 125 PM UNTIL 700
   PM CDT.
   
   HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
   MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55
   STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES NORTH OF
   MILWAUKEE WISCONSIN TO 10 MILES SOUTH OF MARSEILLES ILLINOIS. 
   FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU0).
   
   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.
   
   DISCUSSION...SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP IN
   ADVANCE OF A MID LEVEL TROUGH MOVING ENEWD FROM IA...ALONG AND S OF
   THE WARM FRONT FROM SRN WI INTO NRN IL...AND IN ADVANCE OF A
   PRE-FRONTAL TROUGH AND THE SURFACE LOW MOVING EWD FROM IA INTO SW
   WI/NW IL.  MODERATE INSTABILITY IS EXPECTED IN THE WARM SECTOR TO
   THE N OF THE DEBRIS CLOUDINESS OVER CENTRAL IL...AND PRIMARILY
   UNIDIRECTIONAL DEEP LAYER WIND PROFILES WILL FAVOR SHORT LINE
   SEGMENTS AND SUPERCELLS CAPABLE OF PRODUCING DAMAGING WINDS AND
   LARGE HAIL.  AN ISOLATED TORNADO CANNOT BE RULED OUT /ESPECIALLY
   WITH STORMS INTERACTING WITH THE WARM FRONT/...BUT GENERALLY VEERED
   LOW-LEVEL WINDS IN THE WARM SECTOR AND MINIMAL INSTABILITY N OF THE
   WARM FRONT WILL LIMIT THIS OVERALL THREAT.
   
   AVIATION...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 27040.
   
   
   ...THOMPSON
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