Extreme heat peaks before holiday weekend storms | July 1, 2026

INDIANAPOLIS — The most intense part of this week’s heat wave has arrived. An Extreme Heat Warning remains in effect across central Indiana through Thursday evening as heat index values climb between 105 and 110 degrees. Although the heat dominates the story now, a shift toward an active, stormy pattern is on the horizon just in time for the holiday weekend.

Today and Thursday: Peak Heat Danger

A massive high-pressure ridge is positioned over the Midwest. This will block storm development today and Thursday but trap intense heat and moisture near the surface.

Expect mostly sunny skies with highs in the low to mid-90s. Dew points in the upper 70s will push the heat index to as high as 110 degrees in spots this afternoon. Thursday’s conditions will be similar, with a few more clouds possible late as the ridge begins to break down.

Friday and Holiday Weekend: Return of Storms

As the heat ridge flattens Friday, multiple waves of energy will approach from the northwest, ushering in daily chances for scattered showers and thunderstorms through the Fourth of July.

The abundant moisture in the air means any storm could bring heavy rain and locally intense wind gusts known as microbursts. While a full washout is unlikely, have an indoor backup plan for outdoor activities and monitor the Storm Track 8 Weather app for lightning updates.

Looking Ahead: Relief Early Next Week

A weak cold front is forecast to push through Indiana Monday or Tuesday. This will drop temperatures to the mid-80s and deliver much-needed relief from the persistent heat and humidity endured this week.

7-Day Outlook: