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September 22, 2017 01:47 PM

Storm Center Update - Friday PM September 22

There’s a lot going on for the first day of fall. 

HEAT

First off, there’s a Heat Advisory in southeast KELOLAND until 6pm this evening.  Air temperatures near 90 will combine with dew point temperatures near 70 to create heat index values around 100.  If some temperatures do hit the low to middle 90s this afternoon, we’ll have to watch the record books for record highs. 

It’s not nearly as warm in western South Dakota where strong northerly winds are blowing in cool air with afternoon temperatures in the 50s.  Sandwiched in between are the 70s and 80s. 

FSCAN1

With the big contrast in air masses we’ll watch for developing storms in south central South Dakota this evening.  Some of the storms will become severe with strong winds being the main threat. 

SVR1

There is a marginal risk for severe weather for the eastern half of South Dakota and into western Minnesota.

FSCAN2

Widespread rain is likely in central and northeast KELOLAND for tonight and tomorrow morning.  The orientation of the rain will be from southwest to northeast. 

RAIN

This is a slow moving systems, so when it starts in your area, it may not end for a couple of days.  We expect rain amounts of 2-4” or more by early next week.

SVR2

Because of the slow movement, there’s also a marginal risk for severe weather in eastern KELOLAND tomorrow.

FSCAN3

Southeast KELOLAND has the best chance for rain late in the day on Saturday, with the rain most likely lasting into Monday.

Next week will be much cooler with highs in the 60s.

  • Forecast
  • SD
  • Sioux Falls
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