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Severe Thunderstorm Watch 424
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WW0424 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Very Low Very Low
Severe Wind 65 kt+ Wind
Moderate Moderate
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.
   SEL4

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 424
   NWS Storm Prediction Center Norman OK
   605 AM CDT Mon Aug 10 2020

   The NWS Storm Prediction Center has issued a

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

   * Effective this Monday morning from 605 AM until 1100 AM CDT.

   * Primary threats include...
     Scattered damaging winds likely with isolated significant gusts
       to 75 mph possible
     Scattered large hail and isolated very large hail events to 2
       inches in diameter possible

   SUMMARY...A cluster of thunderstorms along the South Dakota/Nebraska
   border is expected to intensify this morning and track across the
   watch area.  Damaging winds are the primary threat, along with some
   hail potential.

   The severe thunderstorm watch area is approximately along and 40
   statute miles north and south of a line from 40 miles west of
   Yankton SD to 15 miles north northeast of Storm Lake IA. For a
   complete depiction of the watch see the associated watch outline
   update (WOUS64 KWNS WOU4).

   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.

   &&

   AVIATION...A few severe thunderstorms with hail surface and aloft to
   2 inches. Extreme turbulence and surface wind gusts to 65 knots. A
   few cumulonimbi with maximum tops to 500. Mean storm motion vector
   28035.

   ...Hart
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Page last modified: August 10, 2020
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