Indianapolis/ Weather & Environment

Indy Braces for Morning Downpours, Flood Watch Before Cooldown Kicks In

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Published on August 16, 2026
Indy Braces for Morning Downpours, Flood Watch Before Cooldown Kicks InSource: Unsplash/ Erik Witsoe

Indianapolis is waking to a clear but muggy Sunday, with stormy weather quickly moving into the forecast. Scattered showers and thunderstorms are expected from this morning through the afternoon, with a high near 85 degrees and a 70% chance of rain. A Flood Watch remains in effect through noon for Marion County and much of central Indiana.

Storms Arrive This Morning

Rain chances rise quickly after 7 a.m., with showers and thunderstorms most likely through late morning before becoming more scattered this afternoon. West-southwest winds will run 5 to 12 mph, with gusts up to 21 mph. The strongest storms could bring locally damaging wind gusts, brief heavy rain and rapidly rising water in flood-prone areas.

The National Weather Service says additional rainfall could produce flash flooding in rivers, creeks, streams and low-lying locations. Some intense storms may drop 1 to 2 inches or more, though rainfall totals will vary sharply across the city and surrounding counties.

Storm Chances Linger Tonight

Scattered showers and thunderstorms remain possible Sunday night, with mostly cloudy skies and a low around 71. Rain chances drop to about 30%, but wet roads and isolated downpours could still complicate evening travel and outdoor plans. Anyone heading out should check for updated warnings and avoid driving through standing water.

Dryer Weather Takes Over Monday And Tuesday

A welcome break arrives Monday, when skies turn mostly sunny and temperatures reach about 82 degrees. Monday night will be partly cloudy with a low near 64, followed by a sunny Tuesday with another high near 82. A slight chance of showers returns after 2 a.m. Tuesday night.

Another Storm Chance Midweek

Wednesday brings a renewed chance for rain and thunderstorms, with partly sunny skies and a high near 79. The storm chance continues Wednesday night before conditions trend milder and drier Thursday through Saturday. Highs should stay in the mid-70s to upper 70s late in the week, with mostly sunny skies returning by Saturday.