As April wanes, residents in the Columbus and Cincinnati areas can breathe a brief sigh of relief from the tumultuous spring weather. According to the National Weather Service Wilmington, OH, a surface high pressure is bolstering a fortress of dry conditions across the region, which are expected to hold firm through Wednesday night. The forecast for today, indeed, promises fair weather and warm temperatures, with anticipated highs in the "middle to upper 70s areawide under a mix of sun and clouds," as reported by the National Weather Service.
However, this tranquility persists only briefly. The high pressure is slated to slowly drift east of the Ohio Valley on Wednesday night through Thursday. The calm winds on Wednesday evening are expected to give way to a southerly flow by Thursday, potentially pushing highs up near 80 degrees. "Instability looks likely to develop by the afternoon, which may allow isolated showers and storms to form, especially south of I-70," the National Weather Service warns. Should stronger storms form during peak heating, gusty winds and small hail are possible threats on the horizon.
The transition from calm to chaos continues into the weekend, as the area approaches the crux of atmospheric volatility. By Thursday night, a southwest flow is expected to intensify ahead of an approaching mid-level shortwave, which is predicted to bring a cold front, accompanied by showers and thunderstorms in its wake. With the front slicing through the mid Ohio Valley Friday night into Saturday morning, high temperatures for Friday are foreseen to hover in the mid 70s, subsequently cooling down to the mid to upper 60s on Saturday. "Pcpn will taper off from the west later Friday night into Saturday morning as the front moves through," per the long-term forecast by the National Weather Service.
Sunday into Monday signals a brief interlude from the stormy spectacle, as surface high pressure is forecasted to build east across the Great Lakes. It's poised to be mainly dry conditions for Sunday and Monday, but as always, the weather is a capricious beast. Another weak mid-level shortwave might swiftly bring a chance for showers and thunderstorms by Tuesday. "As we get into return flow on the back side of the high, we will see a warming trend through the first part of next week," with temperatures climbing—the high on Sunday inching between upper 60s and lower 70s, before ascending to the low to mid 80s by Tuesday, per NWS.
Aviators can expect unimpeded skies for a spell, as the high pressure ensures VFR conditions persist across the Ohio Valley for the current TAF period. This period of stillness is set, however, to be punctuated by potential thunderstorms drawing close Thursday and Friday. For now, light and variable wings will glide across the sky, with Ohio Valley dwellers likely soaking up the benignity before the weather gears shift once again. The certainty of change lingers in the air, masked by today's unworried sun.
