Seasonable temperatures Monday, wet and cooler pattern mid-week | May 19, 2025

INDIANAPOLIS (WISH) — Heavy rain, severe storms are possible Tuesday.

Monday:

We began the morning dry and relatively clear with very comfortable conditions. Expect clouds to slowly increase through the morning hours as a weakening system from the west approaches central Indiana.

We may see a few light showers develop across central and southern Indiana during the latter part of the morning and early afternoon.

Temperatures will be near normal, topping out in the low to mid-70s, with increased cloud cover this afternoon.

Monday night:

A surface low-pressure system will intensify just to our west, and an attached warm front will begin sliding north, crossing the Ohio River overnight. Both will increase our rain chances overnight.

Overnight lows will fall to the mid-50s.

Tuesday:

Widespread rainfall is expected across much of Tuesday as a storm complex moves through the state. Steady showers with a few rumbles of thunder are likely in the morning, with widespread rain and the potential for heavy downpours during the morning commute and beyond.

In the afternoon, instability will increase, potentially leading to strong or severe thunderstorms south of I-70. The Storm Prediction Center has placed this area under a slight risk for severe weather, with damaging winds, large hail, and the possibility of a tornado or two in the southern half of the state.

Flooding will also be a concern, especially in areas that experience multiple heavy downpours or thunderstorms. Rainfall totals of half an inch to one inch are expected across much of the state, with locally higher amounts possible.

High temperatures on Tuesday will reach the upper 60s to low 70s.

Wednesday:

The heaviest rain will clear by Wednesday morning. An upper-level trough will keep conditions cloudy with scattered light showers on and off through the day. Temperatures will be much cooler, with highs only in the low to mid-60s Wednesday afternoon.

7 day forecast:

On Thursday, lingering effects of the upper-level trough will bring a chance of light showers and seasonably chilly temperatures. The trough will begin to weaken on Friday, helping to break up the cloud cover. Temperatures will remain slightly cool, but conditions should be dry for Carb Day at the Indianapolis Motor Speedway Friday afternoon.

High pressure will build to start the race weekend. Saturday looks pleasant with sunshine and slightly below-average temperatures. Race Day on Sunday will be slightly warmer, with a slight chance of showers. Specifics on timing and amounts remain uncertain, but major impacts to Race Day are not a significant concern at this time. Continue monitoring forecasts as the weekend approaches.