Dayton Faces 1-2 Inches of Rain as Heat Index Tops 90 This Weekend

Q: With more storms looming next week, is Dayton's brief Sunday sunshine just a calm illusion before another strike?

No. Sunday looks like a genuine, if short-lived, break rather than a false calm, but it is unlikely to last deep into next week. The forecast points to the steadiest rain arriving late Friday night into early Saturday, with showers tapering Saturday and rain chances falling to nearly zero by Sunday. That supports a mostly dry Sunday in Dayton, with some sunshine returning after 1 to 2 inches of rain for the weekend in most places, generally less outside of heavier downpours. Friday’s storms are not expected to be broadly severe, though gusty winds, frequent lightning and heavy rain remain possible. What changes the picture is the pattern beyond Sunday. Additional weather guidance and local updates indicate warm, humid air will linger into early next week, and that setup can help trigger another round of showers and thunderstorms later on. Some Dayton-area forecasts suggest the workweek may start relatively quiet before a front increases storm chances again by the middle or latter part of the week. So Sunday is best viewed as a brief window of calmer weather, not the start of a prolonged dry stretch. The bigger concern after the rain exits is heat and humidity: highs in the upper 80s, dew points in the mid-70s and heat index readings of 90 or above could make Sunday feel oppressive even with sunshine. Residents should use Sunday as a dry break, but keep an eye on updated forecasts for renewed storm chances next week.

2 articles · Updated · WHIO · Aug 7

Late Friday night into early Saturday brings Dayton’s best chance for showers and thunderstorms after a mostly cloudy Friday with only isolated daytime storms.
A few stronger cells cannot be ruled out even without a severe-weather forecast, with gusty winds, frequent lightning and heavy downpours the main threats.
Rain chances fade quickly after Saturday morning, with only a stray evening pop-up storm possible and little to no rain expected Sunday.
Highs in the upper 80s and dew points in the mid-70s will push the heat index to 90 or higher as sunshine and humidity build.
Rainfall through Sunday is projected at 1 to 2 inches overall, though most areas should stay on the lower end outside heavier downpours.