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Severe Thunderstorm Watch 345
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WW0345 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.
   SEL5

   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 345
   NWS STORM PREDICTION CENTER NORMAN OK
   1155 AM CDT SUN JUN 22 2014

   THE NWS STORM PREDICTION CENTER HAS ISSUED A

   * SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
     EASTERN IOWA
     NORTHWEST ILLINOIS
     EXTREME SOUTHEAST MINNESOTA
     EXTREME NORTHEAST MISSOURI
     SOUTHWEST AND WEST CENTRAL WISCONSIN

   * EFFECTIVE THIS SUNDAY MORNING AND EVENING FROM 1155 AM UNTIL
     700 PM CDT.

   * PRIMARY THREATS INCLUDE...
     SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
     SCATTERED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE

   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60
   STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES NORTHWEST OF
   CAMP DOUGLAS WISCONSIN TO 30 MILES SOUTH SOUTHWEST OF BURLINGTON
   IOWA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
   WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).

   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.

   &&

   DISCUSSION...STORMS ALONG THE LEADING EDGE OF A MCS HAVE ORGANIZED
   INTO A LINEAR STRUCTURE WITH NEW CELLS DEVELOPING IN ADVANCE OF THE
   SYSTEM WHERE VISIBLE IMAGERY SHOWS AN INCREASING CU FIELD.  THE AIR
   MASS CONTINUES TO DESTABILIZE WITH STRONG HEATING TAKING PLACE
   CONTRIBUTING TO CAPE NEAR 1500-2000 J/KG.  STRONGER CONVECTIVELY
   ENHANCED WSWLY WINDS ALOFT WILL AID IN SYSTEM MAINTENANCE THIS
   AFTERNOON WITH POTENTIAL FOR STORMS TO PRODUCE LARGE HAIL AND
   DAMAGING WIND GUSTS AS STORMS BECOME SURFACE-BASED.

   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 550. MEAN STORM
   MOTION VECTOR 26025.


   ...WEISS
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Page last modified: June 23, 2014
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