KTTC Region Faces Level 3 Severe Storm Risk Wednesday as Supercells Could Spawn Tornadoes, 75 mph Winds
Updated
Updated · KTTC · Jun 9
KTTC Region Faces Level 3 Severe Storm Risk Wednesday as Supercells Could Spawn Tornadoes, 75 mph Winds
3 articles · Updated · KTTC · Jun 9
Summary
Wednesday’s threat comes in two waves: storms may pass through from 3 to 7 a.m., then a more dangerous round is expected from 2 to 9 p.m. as a cold front crosses the region.
Level 3 of 5 risk remains in place because upper-60s to low-70s dew points, 3,500+ J/kg of instability and strengthening wind shear favor rotating supercells before storms organize into a line.
Late-afternoon supercells could produce large to very large hail, strong tornadoes and damaging gusts, with the highest local tornadic risk highlighted near Charles City, Decorah and areas south of I-90.
Evening storms may shift into a line moving south of I-90 toward eastern Iowa, Wisconsin and Illinois, where winds could exceed 75 mph while hail and some tornado risk continue.
Upper-80s to low-90s temperatures and heat indices near 100°F will add to the volatile setup, prompting residents to monitor warnings and prepare a safe shelter.