06/11/2026
Stay alert as this line of storms moves in tonight.
A significant severe weather episode is possible this evening in Indiana. A line of intense storms is expected to develop in Iowa, Wisconsin and Illinois around the mid to late afternoon timeframe. These storms are expected to arrive in northwest Indiana around or just after 7-8pm ET this evening and move southeast through the state as the night goes on.
The atmospheric parameter spaces expected to be in place are supportive of intense damaging winds over 75mph, several embedded tornadoes, and perhaps some large hail.
There is some uncertainty with how current storms over Iowa will impact this forecast. Models show this line weakening as it approaches Chicago. In the event this does not happen and the line continues, it throws a wrench into the forecast with how the evening event evolves. This line may bring severe weather potential in the form of damaging winds to northern Indiana as early as early afternoon. This is something to watch this morning.
This is a "nowcast" situation more than a forecast situation. Real time data and radar trends will matter more than models on a day like today.
Assuming Iowa's current storms do weaken and do not impact this evening's forecast, the following hazards are expected.
Zone 4/Red:
Significant severe weather is expected this evening with intense damaging winds up to 85mph alongside a risk for strong tornadoes embedded within the line. Large hail is possible if any storms remain more isolated in nature. Timing will be between 7pm to 11pm ET
Zone 3/Orange:
Higher concern for significant severe weather with intense winds up to 75mph being the main hazard. Embedded tornadoes may spin up within the line of storms, and some of those may be strong in nature. Large hail is possible if any storms can remain more isolated in nature. Timing is 9pm ET to 1am ET.
Zone 2/Yellow:
Storms will move into this zone after 12am ET and pose a risk for damaging winds to 65mph and perhaps a tornado. Large hail risk seems low to us in this zone.
Zone 1/Mustard Yellow:
Storms should be weakened overall with only isolated instances of damaging winds to 60mph possible. Hail and tornadoes are not expected. Storms arrive after 1am ET.
Stay with us here at IWN for continued updates.