NWS Wilmington OH

An Air Quality Alert has been issued for today and tomorrow, July 20, 2026, for the Miami Valley Region. Smoke from the Canadian wildfires is expected to returned to the Region. The Air Quality Index forecast for today is 101 and 105 for July 20. MiamiValleyAir.org

MORPC has issued an Air Quality Alert for tomorrow, Monday July 20, 2026. Central Ohio is likely to experience ground-level ozone pollution levels that are Unhealthy for Sensitive Groups. Tomorrow’s Air Quality Index is forecast to be 101. Learn more: morpc.org/news/air-quali…

[8:36 AM] Thunderstorms will develop ahead of an approaching cold front on Tuesday. Some severe storms will be possible Tuesday afternoon into the evening, with damaging wind being the main threat.

Correction - Thunderstorms will develop ahead of an approaching cold front Tuesday.

Thunderstorms will develop ahead of an approaching cold front this afternoon into this evening. A few severe storms will be possible, with damaging wind being the main threat.

Severe Thunderstorm Warning including Johnstown OH, Sunbury OH and Utica OH until 7:00 PM EDT

Flash Flood Warning including Portsmouth OH, Wheelersburg OH and West Portsmouth OH until 8:15 PM EDT

[4:18 PM] Several small clusters of storms continue across the local area, w/gusty winds & torrential downpours. More storms organizing to our N will move S through the local area through this evening. Greatest severe threat is near/N of I-70, with less threat near/S of OH Rvr.

[1:38 PM] Line of strong storms capable of producing wind gusts up to 40 MPH moving through.

The main threat for severe weather will occur later this afternoon and particularly in the evening as a cold front moves in from the north. A Severe Thunderstorm Watch has been issued northeast of our forecast area.

[1:15 PM] Scattered storms have developed across the area, but the storms out there right now are not expected to be severe. Brief heavy rain and gusty winds are likely.

[10:50AM] While isolated to scattered storms will develop this afternoon, here is the timing for the more focused severe threat with a line of storms pushing from N to S across the area this evening.

Thunderstorms will develop ahead of an approaching cold front this afternoon into this evening. A few severe storms will be possible, with damaging wind being the main threat.

Flash Flood Warning continues for Blue Ash OH, Madeira OH and Milford OH until 3:45 AM EDT

Flash Flood Warning continues for Cincinnati OH, Norwood OH and Reading OH until 3:30 AM EDT

Some locations have experienced very heavy rain this afternoon leading to flooded roadways. Please take extra caution to avoid driving through flooded roads at night.

We are seeing high end flash flooding in parts of Hamilton County especially near Norwood. This is an OHGO webcam of I-71 at Robertson Ave. When encountering flooded roads, turn around, don't drown.

Flash Flood Warning including Blue Ash OH, Madeira OH and Milford OH until 9:00 PM EDT

Flash Flood Warning including Cincinnati OH, Norwood OH and Reading OH until 8:30 PM EDT

Flash Flood Warning including Mason OH, Sharonville OH and Loveland OH until 7:45 PM EDT