It is going to be another warm and humid day. Afternoon temperatures will range from the upper 80s to low 90s, but the heat index will soar back into the mid to upper 90s for many.

Another system will bring a chance of thunderstorms late today and this evening across central and western South Dakota. Thunderstorms will move east overnight tonight into tomorrow morning and then redevelop across parts of eastern South Dakota, Minnesota and Iowa tomorrow afternoon and evening. Once again, some storms could be severe with the potential for heavy rainfall amounts of one-quarter to one-half inch or more.

The weekend ahead will be sunny, cooler and not as humid. Highs will still reach the upper 80s to low 90s on Saturday, but afternoon temps will drop into the low 80s by Sunday. The cooler 80s will stick around into next week with a chance of showers and thunderstorms by late Tuesday night into Wednesday.

TODAY
Partly cloudy, warm and humid. High: 88°. Wind: Northeast becoming east 5-15 mph.

TONIGHT
Partly cloudy with scattered thunderstorms possible. Low: 71°. Wind: Southeast 5-15 mph.

TOMORROW
Scattered thunderstorms possible in the morning and again late in the afternoon and evening, otherwise partly cloudy, warm and humid. High: 92°. Wind: Southeast 5-15 mph.

It is going to be a brutally hot and humid day. A Heat Advisory is in effect for today across much of central and southern South Dakota. In Sioux Falls, high temps will reach the mid 90s with the heat index approaching 105 degrees through much of the afternoon. Across Central South Dakota, it will not be as humid but actual temperatures will soar to between 105 and 110 degrees.

Our other concern with today’s weather is the potential for strong to severe thunderstorms late today and tonight. Thunderstorms will develop across central and northern South Dakota late this afternoon and move southeastward through the evening and overnight. Storms could be severe with the main threats being large hail and damaging straight-line wind, however, a tornado is also possible. In addition to severe weather, there could also be areas of heavy rain. One-quarter to one-half inch or more of rain will be possible with any storms that develop.  

As of right now, I think storms will develop across central and northern South Dakota late this afternoon into early evening and move southeast into Sioux Falls by mid to late evening. The timing could change a bit, stay with us for updates throughout the day.

TODAY
Mostly sunny, hot and humid. High: 94° with the heat index approaching 105°. Wind: Southeast 10-20 mph.

TONIGHT
Thunderstorms likely. Some could be severe with heavy rain. Low: 70°. Wind: Southeast 5-10 mph.

TOMORROW
Partly cloudy, warm and humid with scattered storms. High: 90°. Wind: East 5-15 mph.