Hot and Humid Today, Heavy Rain Possible Tonight

Hot, humid weather will continue today. A Heat Advisory is in effect for locations along and south of I-90 this afternoon into this evening. High temperatures will once again soar into the 90s with the heat index approaching 100 to 105 degrees.

A cold front will bring a chance of thunderstorms later today and tonight. A few storms could be severe with hail and strong straight-line wind gusts being the main threat. A bigger concern is the potential for heavy rain. There is a lot of moisture in the air today and storms that develop could produce heavy rainfall amounts of 1 to 2 inches or more. The National Weather Service has issued a Flash Flood Watch for parts of southeastern South Dakota, southwestern Minnesota and northwestern Iowa from this afternoon through Saturday morning.

Stay tuned for updates on the severe weather and heavy rain potential.

Warm and Humid With Scattered Storms

It is going to be a warm, humid and breezy day. High temps will range from the upper 80s in Sioux Falls to the low to mid 90s across central and northern South Dakota. The dew point will reach the 70s and that will crank the heat index into the upper 90s to near 100 degrees this afternoon. A Heat Advisory is in effect for places along and west of the James River this afternoon.

Thunderstorms will bring more heavy rain to portions of western, central and northeastern South Dakota later today and especially tonight. These storms will move a little faster than the storms that moved through last night, but heavy rainfall amounts of up to an inch or more will still be possible in some places. In addition to the rain threat, some storms could be severe. Large hail and damaging straight-line wind gusts will be the main threat.

The 4th of July will be another hot, humid day with scattered showers and thunderstorms possible tomorrow afternoon and tomorrow night. There will be scattered thunderstorms around fireworks time tomorrow night, especially in Sioux Falls and across the tri-state region. Storms will move in and out rather quickly, though. I’ll keep the fireworks forecast updates coming as we get closer to tomorrow evening.

The front responsible for storms today and tomorrow should push through by Thursday morning, leaving us with a slightly cooler, less humid, absolutely gorgeous weekend. Friday, Saturday and Sunday will bring plenty of sunshine with high temps ranging from the mid 80s to the low 90s.

Heavy Rain, Flash Flooding Possible

Thunderstorms will bring heavy rain to southern South Dakota, southern Minnesota, northern Iowa and northern Nebraska today and tonight. The heaviest rain will fall along and south of I-90 with some locations getting 2 to 3 or more inches of rain through tomorrow. the National Weather Service has issued a Flash Flood Watch for locations south of I-90 that is in effect this afternoon through Thursday morning. Sioux Falls, Yankton, Vermilion, Freeman, Sioux City, Sioux Center, Spirit Lake/Okoboji, Spencer, Le Mars and Cherokee are just some of the cities included in the watch.

The rain and clouds will hold temperatures in the upper 60s to low 70s today and tomorrow.

Unfortunately, the driest part of our region will not be getting much rain at all. Most of northern South Dakota will stay dry with high temps in the 80s through the rest of the week.

Our unsettled weather pattern will calm down a little by the weekend. Saturday and Sunday will be partly cloudy with highs in the upper 70s to low 80s, but there will still be a chance of late day and nighttime thunderstorms through the weekend.