The National Weather Service reported that a brisk change has swept into Columbus and Cincinnati, bringing much cooler weather and near-record low temperatures. According to the Area Forecast Discussion, this change is due to the high pressure of Canadian origin building into the region from the west. The forecast for the weekend suggests subnormal temperatures for this time of year, with expected highs ranging from the mid-60s to near 70 degrees along and south of the Ohio River.

The National Weather Service's forecast, indicating that the high will decisively settle into the Ohio Valley tonight into Sunday, suggests near-record lows are in store for the night of September 8. The Ohio Valley is predicted to see lows dipping between the upper 30s to lower 40s. "Under mainly clear skies, northerly winds will diminish overnight. This will set the stage for some chilly overnight lows," the National Weather Service explained. Specifically for the big three climate sites, Columbus (CMH) is forecasted to hit a chilling 43°F, possibly approaching the record of 39°F set in 1951.

As the weekend progresses, the surface pressure will remain high over Ohio. While Sunday is anticipated to bring abundant sunshine and a modest temperature rise, highs are still predicted to linger below the September norm, around the lower 70s. The high-pressure system is also forecasted to bring drought conditions without significant precipitation.

The National Weather Service elaborates that next week, the weather pattern over Ohio is set to remain stable, with surface high pressure projected to gradually shift eastward. The mid-level ridge is to build into the Ohio Valley from the southwest, contributing to a dry forecast for the duration of the week. A gradual warming trend is expected as the ridge fortifies, inviting warmer days ahead after this brief cool spell.