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.