textproduct: Indianapolis

KEY MESSAGES

- Hot and humid today. Heat indices between 100 and 105 degrees.

- Thunderstorms likely again late tonight. Strong to severe storms possible, especially across northwestern portions of central Indiana.

- Slightly cooler weather for the weekend with near average temperatures.

- Showers and thunderstorms possible on Sunday.

DISCUSSION (This evening through Thursday)

Issued at 330 PM EDT Thu Jun 11 2026

Heat and humidity continue today with heat indices near 100 degrees this afternoon. Behind a cold front, which will bring a line of showers and thunderstorms tonight, some relief to the hot conditions will arrive.

Tonight's round of convection will also be spurred on by a wave ejecting from the broader trough aloft. Recent CAM runs continue to slow the line down despite lagging slightly from where storms are actively ongoing to our northwest. Still can't rule out the line slowing some between now and tonight, but will keep with the arrival timing between 8pm and 10pm rather than later. Guidance continues to show a bit more energy in the atmosphere which could lead to severe thunderstorms at times, especially northwestern portions of central Indiana. Like last night, storms will likely become outflow dominant as they head southeast away from the best forcing and shear, but damaging wind gusts will again be the main threat as storms decay over our forecast area. Localized flooding may also be a concern in heavier storms. Storms are expected to weaken by around 2am followed by rain and the associated cold front exiting to the SE by tomorrow morning.

Behind the front, central Indiana will see some relief for the weekend. Another system will likely bring additional showers and storms Saturday night to Sunday morning followed by further heat and humidity relief going into the start of next week.

AVIATION (18Z TAF Issuance)

Issued at 222 PM EDT Thu Jun 11 2026

Impacts:

- Gusty SW winds from 20-25 kts during the afternoon.

- Thunderstorms arrive this evening, approaching KIND during freighter inbounds.

Discussion:

Increasing SW wind gusts of 20-25 kts by afternoon are expected.

Another convective line will move across central Indiana tonight possibly affecting KIND during the middle part of the freighter inbounds. As storms move through, temporary lowered ceilings and visibilities to MVFR or worse will be possible. Rain is expected to exit all TAF sites by 09z.

After the storms end tonight, a cold front will cross the area causing winds to become west-northwesterly.

IND WATCHES/WARNINGS/ADVISORIES

None.