INDIANAPOLIS — Dangerous heat continues to build as central Indiana faces an Extreme Heat Warning through Thursday evening. This upgrade from a Heat Advisory reflects the intense and prolonged conditions caused by a high-pressure system anchored over the Ohio Valley. Expect several consecutive days of temperatures climbing into the 90s with oppressive humidity making it feel like 105 to 110 degrees during peak afternoon hours.
Today and Wednesday: Peak Heat with Little Relief
At the heart of the high-pressure ridge, Indiana will experience minimal cloud cover, offering limited relief from the heat.
- Temperatures: Afternoon highs will reach the low to mid-90s today and Wednesday.
- Heat Index: The combination of heat and humidity will produce feels-like temperatures between 105 and 110 degrees.
Tonight, muggy conditions persist with lows hovering in the mid-70s to around 80 degrees.
Thursday: Sustained Intense Heat and Storm Chances
The Extreme Heat Warning remains active until Thursday evening. While clouds may increase slightly as moisture circulates around the weakening high-pressure system, temperatures will still reach the mid-90s with heat indices above 100.
Late Thursday may bring isolated showers or thunderstorms as the weather pattern starts to shift and the heat dome flattens.
Independence Day Weekend: Storm Threat Grows
Heading into the holiday weekend, the jet stream will dip south, triggering multiple waves of storm activity across Indiana.
- Friday: Thunderstorm chances rise sharply with a risk of slow-moving, heavy precipitation storms.
- Saturday and Sunday: Expect the potential for organized storm complexes that could bring damaging winds and heavy rainfall, especially in the afternoons and evenings.
- Temperatures: While the extreme heat will ease, it remains extremely warm and muggy with highs in the upper 80s to near 90 degrees.
