Scattered severe storms will be possible Tuesday afternoon across portions of South Dakota, Minnesota, Wisconsin, and Iowa. An extremely unstable airmass will develop Tuesday afternoon as 60 and 70 degree dew points surge north. This will provide the instability for supercells to develop initially, before merging into a bowing segment, which will push into Iowa Tuesday evening.
Storms will develop along a cold front which will track off to the southeast during the late afternoon and evening hours Tuesday. Storms will fire after 4pm across southwest Minnesota/eastern South Dakota, and will initially be isolated. This is when storms will have the greatest tornado potential, which has been outlined by the Storm Prediction Center in the “enhanced risk” area. As storms merge and push to the southeast, the severe threat will transition to an intense wind gusts and large hail threat. This is why a slight risk has been issued for all of Iowa.
Our chase team will be leaving early tomorrow morning to get into position, and will be streaming live at ChaserNation.com. Continue to check back to the Iowa Storm Chasing Network for the very latest updates.