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March 20, 2017 03:45 PM

Storm Center Update - Monday PM, March 20

Temperatures have been 15-20 degrees cooler today than yesterday, but still above-normal for the first day of Spring. Most of KELOLAND has been in the 50s, with high clouds streaming in from the west, thickest north of I-90.

Tonight upper level energy comes in from the west, creating some rain or snow showers mainly in western and south central South Dakota. Snowfall is most likely in the west, though amounts should be light (around an inch in Rapid City). Sioux Falls might see a few flakes, but with little or no accumulation. Overnight lows will be in the upper 20s to low 30s.

Tomorrow we’ll see clouds continue to stream in, with flurries possible in Sioux Falls and the SE. The better chance of snowfall will be in western South Dakota to the east along the Nebraska border in south central South Dakota. Highs will be even cooler than today, in the upper 30s to low 40s, with a northeast breeze.
 Tuesday South Dakota weather forecast

Wednesday will be mostly cloudy and even colder East River, with highs in the upper 30s East River. Central and Western South Dakota will have a brisk SE wind, so they will warm to the mid 40s, with Rapid City much warmer at 63. There is a good chance of rain or snow showers, but again the air will be relatively dry so amounts will be light. The best chance of precipitation will be along the Nebraska border.
 Wednesday South Dakota weather forecast

Thursday and Friday will be a different story, with a strong system moving through the central US. We expect strong winds as this low pressure system tightens, and rainfall will become heavy in south central and SE KELOLAND. There may even be some lightning with those rains. Currently, one model puts down 1-2” of rainfall in south central and SE South Dakota and SW Minnesota. With the warm moist air being drawn into the system we are looking at rain rather than snowfall with this potent system.
 Rainfall forecast South Dakota

Skies should be partly cloudy this weekend, but temperatures will not be nearly as warm as last weekend. We’re expecting highs a few degrees either side of 50 East River.

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