A very large and complex storm system will spin across the Midwest and Great Lakes over the next few days bringing several rounds of heavy rain and strong storms to Ohio. Later in the week, this system will bring cooler and showery weather.
Strong wind shear and plentiful moisture are combining to bring a major severe weather outbreak across the Deep South today. The worst of the severe weather will remain south of central Ohio, however rain and thunderstorms will become likely overnight.
A warm front sits just south of Columbus as of 5 p.m. this afternoon with northeast winds and middle 50s here and southwest winds and lower 70s in Cincinnati. This front will slowly move north overnight causing temperatures to warm up. Expect scattered showers this evening with heavier rain likely overnight.
A disturbance riding the frontal boundary will bring rounds of heavy rain and thunder to Columbus overnight. An isolated strong storm with gusty winds cannot be ruled out as well. The heavy rain will depart to the east by mid-morning on Tuesday. In its wake, sunshine will move in allowing a quick spike in temperatures. It will be a breezy and warm day with highs reaching the upper 70s.
That sunshine will build up some instability in the atmosphere through the day which the next disturbance in the atmosphere will be able to work with late Tuesday evening. Isolated storms are possible through the afternoon but the highest threat will be after 8 p.m. Once again, isolated severe storms are possible with damaging winds and large hail being the main threats.
A cold front will slowly move through the region late Tuesday night and Wednesday. Isolated showers and storms will once again be possible through Wednesday because of this. Highs will still make it well into the 70s with some sunshine making it through the clouds.
The large upper level low pressure system will slide east and provide cooler and showery weather for the remainder of the week and first half of the weekend. Expect highs to fall back into the 50s and 60s with scattered showers each day.