Indianapolis rolled into Saturday, June 20, under a blanket of partial cloud cover, with morning temperatures in the mid‑60s and an afternoon high near 80°F on tap. A few isolated showers could sneak through by midday, but the main show is set for Sunday, when a stronger system moves in with widespread rain and the threat of heavier downpours. Light west‑to‑northwest breezes this afternoon are expected to swing around from the southeast ahead of that Sunday system.
What To Expect
A Flood Watch is in effect from Sunday afternoon, June 21, through Monday morning, June 22, for much of central Indiana as a slow‑moving low pressure system spins in rounds of showers and thunderstorms. The National Weather Service is calling for 1–3 inches of rain, with higher local amounts where storms repeatedly track over the same spots, which could trigger flash and urban flooding.
Plan on a soggy Sunday. Showers are likely on and off for much of the day, with heavier, steadier rain possible Sunday night, especially across south and central Marion County and neighboring counties, according to forecasters. If your weekend plans depend on dry skies, you might want to have a backup ready.
Timing And Impacts
Through Saturday afternoon, any showers should stay scattered and mainly light. The higher risk for more organized showers and thunderstorms arrives Sunday afternoon and continues into Sunday night. Some of those storms could pack heavy rain and gusty winds.
By Sunday night, wind gusts could reach 20–25 mph, and the setup includes the chance for training storms, where cells repeatedly pass over the same neighborhoods. That pattern would quickly boost the risk of localized flooding and ponding on roads, especially in low‑lying areas and spots with poor drainage.
If you have outdoor events lined up for Sunday, treat them as weather dependent, allow extra time on the roads, and skip shortcuts that dip through low spots or underpasses that are prone to taking on water.
Prepare And Plan
Before the heavier rain arrives, secure loose outdoor items, and, where possible, move vehicles off low‑lying streets or driveways. Residents near creeks, drainage ditches, or in neighborhoods that have flooded before should keep a close eye on conditions and have a plan to head to higher ground if water levels start to rise. For some recent context on how similar patterns have affected local commutes, see our soaked sunrise commutes.
For the latest watches and warnings, monitor local updates and the National Weather Service Indianapolis office.
Beyond The Weekend
Rain is expected to taper off Monday, June 22, with highs in the mid‑70s as drier air moves in. Tuesday should bring more sunshine and highs near 78°F. Later in the week, scattered, mainly light showers return to the forecast, which means midweek plans are likely to be considerably more pleasant than anything scheduled for Sunday.
