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Severe Thunderstorm Watch 422
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WW0422 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.
   SEL2

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 422
   NWS Storm Prediction Center Norman OK
   450 PM CDT Wed Jul 19 2017

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     Northwest Iowa
     Northern Nebraska
     Southeast South Dakota

   * Effective this Wednesday afternoon from 450 PM until Midnight
     CDT.

   * Primary threats include...
     Scattered large hail and isolated very large hail events to 2.5
       inches in diameter possible
     Scattered damaging wind gusts to 70 mph possible

   SUMMARY...A cluster of storms along the South Dakota and Nebraska
   border vicinity will likely continue to spread generally eastward
   along an effective boundary, aided by a very hot/moist air mass near
   and south of this boundary. Sporadic large hail will be possible
   aside from damaging winds.

   The severe thunderstorm watch area is approximately along and 50
   statute miles north and south of a line from 30 miles west northwest
   of Ainsworth NE to 40 miles northeast of Sioux City IA. For a
   complete depiction of the watch see the associated watch outline
   update (WOUS64 KWNS WOU2).

   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 420...WW 421...

   AVIATION...A few severe thunderstorms with hail surface and aloft to
   2.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
   few cumulonimbi with maximum tops to 600. Mean storm motion vector
   28025.

   ...Guyer
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Page last modified: July 20, 2017
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