Residents of Columbus, Cincinnati, and the surrounding areas are advised to brace for a wintry mix today as a low-pressure system runs across the middle Ohio Valley. According to the National Weather Service, precipitation is expected to fall as rain initially. Still, it could swiftly transition into snow due to strong vertical motion and temperatures nearing the freezing point. "Dynamic lift with an upper level short wave will combine with low level convergence associated with the attendent cold front to produce a shield of precipitation," states the Service's forecast discussion.
The weather shift poses a particular concern for the morning commute, especially within east central Indiana and western/southwestern Ohio, including the Cincinnati and Dayton metro areas. The forecast suggests snow accumulations ranging from half an inch to two inches, primarily on elevated and grassy surfaces. However, temperatures and pavement hovering around freezing could result in treacherous road conditions and slick spots, particularly on bridges and overpasses. A Special Weather Statement has been issued to highlight the potential risks during this morning's commutes.
As the day progresses, the low is expected to move southeast toward West Virginia, but the weather will not clear up immediately. "Some wrap around precipitation is expected, but this will be lighter in nature than this morning's activity," the NWS forecast discussion elaborates. Although slightly warmer air will wrap around the low before the colder air settles in tonight, the remainder of the afternoon is anticipated to see a mix of rain and snow, with temperatures peaking in the lower to mid-30s west to the upper 30s east.
Cold air will continue to influence the region's weather into the weekend. Tonight, as cold air advection (CAA) persists, temperatures are forecasted to drop, with lows ranging from near 20 in the north to upper 20s along and south of the Ohio River. Saturday promises no respite from the chill, with partly cloudy skies and highs only reaching the upper 20s north to lower 30s south. "Surface high pressure centered over the upper Mississippi River Valley/western Great Lakes, will build southeast toward our region," notes the NWS forecast, indicating a sustained period of lower-than-average temperatures.
Looking ahead, Sunday may bring the coldest air of the forecast period, with morning lows anticipated to be between 15 and 20 degrees under the influence of high pressure. A gradual warming trend is expected next week, with rain chances returning by Monday night and temperatures in the low to mid-40s by Monday. However, models begin to diverge after Tuesday, suggesting uncertainty in the forecast beyond this point. For air travelers, the National Weather Service's Aviation Outlook warns of potential IFR/LIFR conditions today and lingering MVFR ceilings into Saturday.
