The forecast for the Columbus, Cincinnati, and Wilmington areas promises a continuation of dry and mild conditions heading into midweek, with an uptick in temperatures expected as the week progresses. According to the National Weather Service, "Abundant sunshine and seasonably mild temperatures will prevail through the first half of the workweek." The tranquility in the weather is attributed to an "anomalously dry air" that has settled into the Ohio Valley, prompting daytime temperatures to reach around 80 degrees, a couple of ticks above the normal, due to extensive dry air in place and the preceding dry ground conditions.
Today's temperatures started in the upper 40s through the central parts of Ohio, sliding towards the mid-50s in areas closer to the Ohio River, and are anticipated to warm up swiftly. Notably, the humidity levels might dip near or just below 25% in the afternoon, particularly around and north of the Ohio River into central Ohio. The National Weather Service also noted that winds are expected to "remain around 10kts or less this afternoon, lessening the concerns about more pronounced fire weather conditions evolving locally."
As the surface high pressure shifts east into the interior northeast of the country tonight, temperatures are poised to cool down rapidly post-sunset, with "fairly good radiational cooling conditions," according to National Weather Service discussion. Lows are estimated to reach the upper 40s in central Ohio to the upper 50s in Northern Kentucky come Wednesday morning before bouncing back to the mid-80s by the late afternoon. The area will also experience southeasterly flow as the high pressure moves further east, maintaining the dry air conditions despite richer lower-level moisture surges to the north across neighboring Illinois and Indiana going into Thursday.
Looking ahead, warmer temperatures will make a comeback, with highs potentially reaching the middle 80s to around 90 come Thursday under the influence of a subtle H5 ridging and return flow. Nonetheless, the forecast for Columbus and neighboring regions indicates that the next wave of cooler air isn’t far behind, with a sinking H5 trough expected to usher in "anomalously low temperatures" by next weekend, with highs just peaking in the upper 60s and lower 70s. The forecast update from the National Weather Service summarized, "By Monday, a subtle warmup will begin, but still expecting highs to remain in the 70s."
In aviation news, VFR conditions will continue area-wide, with some potential for river valley BR/FG near daybreak on Wednesday. "Sfc high pressure will remain in control with a very dry airmass in place into Wednesday," according to current aviation forecasts. Some SCT/BKN cirrus will pass over the region during the day, moving to the south by the end of the period. Calmer conditions tonight could lead to some river valley fog and MVFR visibility, particularly at the KLUK airport during pre-dawn hours.
