Sunny, Warm Days Ahead… Storms Thur/Fri

It is going to be sunny, warm and somewhat humid for the next couple of days. Highs will reach the mid 80s in Sioux Falls today while parts of central South Dakota warm into the low to mid 90s. Tomorrow will be warmer and a little breezier with high temps ranging from the low 90s in Sioux Falls to the mid 90s across central South Dakota. It’s not going to be quite as humid as it was the last time we had a string of 90 degree days, but you will definitely notice the humidity.

A powerful cold front will blast across the Dakotas Thursday and Friday, moving into Iowa and Minnesota late Friday into Saturday. That front will bring a good chance of thunderstorms, and some of them will probably be severe. Severe storms are possible across central and northern South Dakota Thursday afternoon and Thursday night, the severe weather threat will shift to southeastern South Dakota, southern Minnesota, eastern Nebraska and western Iowa on Friday. Storms should end by late Friday night in most places, however, they could linger into Saturday morning across the extreme southeastern part of our KSFY coverage area.

After the front passes, cool and dry Canadian air will slip in from the north. Saturday and Sunday will be mostly sunny with highs only reaching the low 70s Saturday, we will warm back to the mid to upper 70s by Sunday.

Scattered Storms Today, A Nice Weekend Ahead

Today will be partly to mostly cloudy, warm and humid. High temperatures will only reach the mid 80s but the dew point will be back in the upper 60s to low 70s which will make it feel sticky. Thunderstorms will develop along east of the James River by early to mid afternoon and move east into Iowa and Minnesota by early evening. Some storms could be severe with large hail and damaging straight-line wind being the main threat.

After the storms roll out, drier air from the northwest will roll in. Tomorrow will be sunny with temperatures similar to today, but it will be a lot less humid. The weekend will be partly cloudy with highs in the mid 80s. An isolated late afternoon or nighttime thunderstorm is possible, especially across northern South Dakota.


Severe Storms Likely Tonight

The storm prediction Center has issued a moderate risk for severe storms across much of South Dakota and portions of Iowa, Minnesota and Nebraska. Storms will develop across western and central South Dakota by late this afternoon and move east through the night tonight.

As storms initially develop across central and western South Dakota, there will be the potential for large hail and possibly even a tornado or two. As storms progress eastward, they will evolve into a line of severe storms and the primary severe threat will transition to damaging straight-line wind gusts in excess of 70 or 80 mph.

As of right now, I think that storms are move into to central South Dakota by early evening, the James Valley after 9 or 10 PM, and into the Sioux Falls area and places along I-29 after 10 PM, possibly as late as midnight. Storms will then progress into Iowa and Minnesota during the early morning hours. Timing could change a bit depending on where and when storms develop. Be sure to stay tuned throughout the day for the latest developments.