Storm Center Update- Friday PM, September 15th

Weather
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It has been another warm day in Sioux Falls and SE KELOLAND – in part due to a brisk southerly wind, and in part due to the fact we’ve had a “clear slot” of sunshine in what is otherwise a mostly cloudy KELOLAND. With those thicker clouds, temperatures have only been in the 60s and 70s. In fact, with light rain and a NE breeze, Aberdeen has been in the 50s much of the day. There have been some more thundershowers in north central South Dakota, which should help clear some of that wildfire smoke out of the air. As expected, the heaviest rain has occurred in the drought stricken NW part of South Dakota, where over an inch has fallen.

We expect thunderstorms in SE KELOLAND this evening, and there is the possibility (a marginal risk) they will be severe with hail and strong winds. They may have an impact on Friday evening football games.  

General showers and thunderstorms will continue across the rest of KELOLAND tonight, though the lightning risk will be less in western South Dakota. Overnight lows will be in the 50s to low 60s. Western South Dakota, with a brisk northerly wind, will be significantly cooler with lows in the low 40s.

Tomorrow we’ll continue to see light to moderate rain showers. Thunderstorms will be possible from Sioux Falls and I-29 to the east as the main energy pulls away. Clouds will be in abundance, and with a northwest breeze temperatures will be sharply cooler. We’re still looking for most places to be in the 60s for daytime highs. Rapid City might have a difficulty getting out of the 50s. 

Saturday night will be chilly as clouds break up and cool high pressure settles in. We’re looking for Saturday night’s low temperatures to be in the low to mid 40s. Rapid City and the Black Hills area might drop down into the 30s.

Sunday afternoon looks nicer, though it will still be cooler than normal. Highs will be in the upper 60s East River and the low 70s in the west.

We’ve had to add a chance of thunderstorms in Sioux Falls and SE KELOLAND on Monday, though skies will still be mostly sunny across the KELOLAND region. Temperatures will rebound into the 70s East River and low 80s in the west.

Tuesday looks like another sunny and warm day, with highs in the low 80s under mostly sunny skies.

Temperatures will remain at- or above-normal for the rest of next week. We’ll see some disturbances coming in from the SW United States the second half of next week, so we’ll have at least a chance of thunderstorms each day Wednesday through Friday.

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