Heavy thunderstorm for Sioux Falls overnight

The National Weather Service published a heavy thunderstorm for parts of South Dakota, Nebraska, Iowa and Minnesota until 3:00 a.m. on Saturday morning. The watch area includes Sioux Falls

A severe thunderstorm guard means that the conditions for serious thunderstorms are favorable.

“Widespread intensive thunderstorms, including super cells, will develop in the overnight stay in the overnight stay. – NWS

Read more: Debunking 5 Common Tornado Myths in South Dakota

  URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 524
   NWS Storm Prediction Center Norman OK
   810 PM CDT Fri Jul 18 2025

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     Northwest Iowa
     Southwest Minnesota
     Central and Northeast Nebraska
     Southeast South Dakota

   * Effective this Friday night and Saturday morning from 810 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
     A tornado or two possible

   SUMMARY...Widely scattered intense thunderstorms including
   supercells will develop and track across the watch area into the
   overnight period.  Large hail and damaging wind gusts are the
   primary concerns.

   The severe thunderstorm watch area is approximately along and 60
   statute miles north and south of a line from 40 miles west northwest
   of North Platte NE to 45 miles north northeast of Fairmont MN. 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.