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Severe Thunderstorm Watch 406
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WW0406 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.
   SEL6

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 406
   NWS Storm Prediction Center Norman OK
   940 PM CDT Sun Jul 9 2017

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     Northern Iowa
     Parts of southwestern and southeastern Minnesota

   * Effective this Sunday night and Monday morning from 940 PM
     until 300 AM CDT.

   * Primary threats include...
     Scattered large hail and isolated very large hail events to 2
       inches in diameter possible
     Scattered damaging wind gusts to 70 mph possible

   SUMMARY...Clusters of supercells in Minnesota will continue to move
   toward the south-southeast overnight, with a continued threat for
   large hail and damaging winds.  Some upscale growth of the storms
   will be possible, which will tend to favor some increase in the
   potential for damaging winds.

   The severe thunderstorm watch area is approximately along and 45
   statute miles north and south of a line from 5 miles north of
   Spencer IA to 45 miles south of La Crosse WI. 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 405...

   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 550. Mean storm motion vector
   32030.

   ...Thompson
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Page last modified: July 10, 2017
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