Indianapolis is waking up to clear skies and a cool 61°F at Indianapolis International Airport this Sunday morning, but the quiet start will not stick around for long. Scattered showers and storms are expected to fire up after 4 p.m., with heavier, more persistent rain likely overnight. A Flood Watch is in effect from 2 p.m. Sunday, June 21, 2026, through Monday morning, raising the risk of ponding and creek flooding in low-lying neighborhoods.
Afternoon Into Tonight
This afternoon stays partly sunny with a high near 79°F and light southeast winds around 0 to 9 mph. Scattered showers and thunderstorms are possible after 4 p.m., with rain chances around 40 percent late in the day, then ramping up quickly after sunset. Showers and thunderstorms are likely overnight, with south winds increasing to 9 to 13 mph and gusts up to 23 mph. New rainfall totals of 1 to 2 inches are possible, according to NWS Indianapolis.
Flood Risk And Impacts
Flooding could develop quickly wherever storms drop heavy rain or repeatedly track over the same spots, and the already saturated ground will only speed up runoff. Expect standing water on side streets and at low underpasses, along with the potential for localized road closures in neighborhoods that regularly see creek or storm-drain backup. A few storms may turn strong, with damaging wind or heavy downpours that cut visibility and boost the risk of flash flooding.
Plan For Your Commute
If you need to be out this evening or for the Monday morning drive, build in extra travel time, since flash flooding and wet roads are likely to slow traffic. Never drive through standing water; turn around, do not drown, and move to higher ground if you run into impassable streets. Check real-time road conditions and any closures before heading out at 511IN.
Monday Outlook
Monday turns cooler behind the overnight rain, with a high near 75°F as showers gradually taper off and northwest winds increase to 7 to 10 mph with gusts near 20 mph. By Tuesday, conditions are expected to dry out, with more sunshine and highs in the upper 70s into midweek.
Keep phones charged and have a plan if you live in a flood-prone area, including moving valuables to upper floors and being ready to act if warnings are issued. The situation could change quickly, so monitor local alerts and forecasts through the evening, and we will pass along updates if watches are upgraded to warnings.
