National Weather Service United States Department of Commerce

Extreme Heat and Severe Thunderstorms Today

Extreme heat continues today from the central Plains to the lower Mississippi River Valley, over southeast Montana, and from southern California into the Southwest Deserts. Extreme Heat Warnings remain in effect. Severe thunderstorms capable of strong to severe wind gusts and large hail are possible across the Great Lakes into the Ohio Valley today into tonight. Read More >

Line of severe storms will continue moving south across east central/southeastern WI through the mid-afternoon hours. Damaging winds in excess of 60mph, hail to the size of half dollars and an isolated, brief tornado are expected
Overnight severe storms have been heavily delayed by dry air and capping. Storms are now projected to move through between 6AM and Noon this morning, with more potential for scattered storms later today.
Thunderstorms are expected to cluster over northern WI and move southward with time, capable of all hazards. Afternoon redevelopment will be conditional and will depend upon if we can destabilize after the morning storms.
An Extreme Heat Warning and a Heat Advisory is in effect until 9PM tonight for heat indices between 100 and 110 degrees.