Large hail, high winds possible as Wednesday thunderstorms approach Sioux Falls

Update as of 9:20 p.m.: The NWS stated on X that "a boundary from northern thunderstorms will be approaching from the north and northeast over the next 20-30 minutes."

The NWS stated 40-50 mph winds could be possible, and "may lead to quick thunderstorm development."

Brandon is under a severe thunderstorm warning until 10 p.m.

"If you are traveling between Sioux Falls and Jackson on I-90 or any east-west road in this area an outflow with wind gusts around 50 mph is likely by 10 p.m.," the NWS stated on X.

Update as of 7:30 p.m.: Parts of southeastern South Dakota are now under a severe thunderstorm watch until midnight, according to the National Weather Service in Sioux Falls.

At 7 p.m,, the NWS' storm prediction center stated radar imagery was showing the development of "isolated strong storms about 50 to 60 statute miles to the southwest of Sioux Falls."

The storms are in a "pocket of extreme instability" and the storms could grow into a larger cluster, moving into southwestern Minnesota late in the evening.

"The instability, combined with moderate deep-layer shear and steep mid-level lapse rates, suggest that supercell formation will be possible," the prediction center update states. "Supercells will likely be associated with large hail and isolated severe wind gusts. Hailstones greater than 2 inches in diameter will be possible. A transition to a more linear structure will be possible as low-level flow increases, especially if a cold pool can organize."

A couple tornadoes may also be possible.

At least one tornado warning has already been issued to the southwest of Sioux Falls, in the Tripp area until 7:45 p.m.

Earlier story: Severe thunderstorms could hit Wednesday afternoon through the evening for the Sioux Falls area, bringing chances of large hail and high winds.

The chances of storms begin at about 2 p.m., with the highest risk of severe weather at about 6 p.m., with storms tapering off at about 10 p.m.

The primary hazards possible are hail up to 2 inches in size and wind gusts up to 70 miles per hour, with tornadoes and minor flooding listed as secondary threats.

Here's a look at the forecast for the next week as of 12:30 p.m. Wednesday:

This afternoon : A 50% chance of showers and thunderstorms, mainly after 3 p.m. Partly sunny, with a high near 89. Southeast wind around 10 mph.

Tonigh t: A 50% chance of showers and thunderstorms, mainly before 3 a.m. Mostly cloudy, with a low around 65. East wind 5 to 10 mph becoming northwest after midnight.

Thursday : Mostly sunny, with a high near 86. North northwest wind 5 to 15 mph, with gusts as high as 20 mph.

Thursday night : Mostly clear, with a low around 64. North northwest wind 5 to 10 mph.

Friday : Sunny, with a high near 90. North northeast wind around 5 mph.

Friday night : Clear, with a low around 66. Northeast wind around 5 mph becoming calm in the evening.

Saturday : Sunny, with a high near 91.

Saturday night : Partly cloudy, with a low around 69.

Sunday : Mostly sunny, with a high near 87.

Sunday night : Mostly cloudy, with a low around 69.

Monday : Partly sunny, with a high near 83.

Monday night : Partly cloudy, with a low around 68.

Tuesday : Mostly sunny, with a high near 83.

This article originally appeared on Sioux Falls Argus Leader: Large hail, high winds possible as Wednesday thunderstorms approach Sioux Falls