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Severe Thunderstorm Watch 506
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WW0506 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Very Low Very Low
Severe Wind 65 kt+ Wind
Moderate Low
Severe Hail 2"+ Hail
Low Very 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.
   SEL6

   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 506
   NWS STORM PREDICTION CENTER NORMAN OK
   545 PM CDT SAT SEP 20 2014

   THE NWS STORM PREDICTION CENTER HAS ISSUED A

   * SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
     NORTHERN IOWA
     SOUTHEAST MINNESOTA
     WESTERN WISCONSIN

   * EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 545 PM UNTIL
     1000 PM CDT.

   * PRIMARY THREATS INCLUDE...
     SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
     ISOLATED LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE

   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80
   STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES NORTH OF LA
   CROSSE WISCONSIN TO 25 MILES SOUTHEAST OF MASON CITY IOWA.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
   UPDATE (WOUS64 KWNS WOU6).

   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 503...WW 504...WW 505...

   DISCUSSION...LOOSELY ORGANIZED BAND OF STRONG TO SVR TSTMS AHEAD OF
   LEAD IMPULSE ASSOCIATED WITH AMPLIFYING N CNTRL U.S. UPR TROUGH
   EXPECTED TO MAINTAIN SUFFICIENT STRENGTH TO POSE AN ISOLD TO SCTD
   DMGG WIND THREAT THROUGH AT LEAST MID EVE AS THE LINE CONTINUES SEWD
   IN SE MN/SW WI AND NRN IA. LINE MAY BE AUGMENTED BY DEVELOPMENT OF
   ADDITIONAL DISCRETE STORMS AHEAD OF THE LINE. GIVEN 50+ KT WNW DEEP
   SHEAR AND RELATIVELY COOL MID-LVL TEMPS...SETUP ALSO MAY YIELD
   STORMS WITH MARGINALLY SVR HAIL DESPITE ONSET OF NIGHTFALL.

   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.
   A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 350. MEAN STORM MOTION
   VECTOR 30035.


   ...CORFIDI
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Page last modified: September 21, 2014
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