The National Weather Service has issued a Severe Thunderstorm Watch for parts of South Dakota, including Sioux Falls, until 11:00 PM Tuesday.

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

  Severe Thunderstorm Watch Number 409
   NWS Storm Prediction Center Norman OK
   655 PM CDT Tue Jul 11 2017

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     Southwestern Minnesota
     Eastern South Dakota

   * Effective this Tuesday evening from 655 PM until 1100 PM CDT.

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

   SUMMARY...Scattered thunderstorms will persist through late evening,
   some of which could be supercells.  The strongest storms will have
   the potential to produce large hail and isolated damaging winds.

   The severe thunderstorm watch area is approximately along and 50
   statute miles east and west of a line from 40 miles north of
   Ortonville MN to 35 miles east southeast of Mitchell SD. For a
   complete depiction of the watch see the associated watch outline
   update (WOUS64 KWNS WOU9).

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