Following a particularly damp start to our Wednesday, the remainder of our midweek will remain dry and more pleasant overall; After seeing the mercury reach 77° in Evansville earlier this evening, temperatures will gradually head for 69° by 10PM before dipping to 63° early Thursday morning. The dry conditions will linger though the overnight hours and into the first half of our Thursday - this will allow for more sunshine and warmer weather to return to the Tri-State Thursday afternoon. Peak temperatures will push back into the mid to upper 80s across the Ohio Valley tomorrow, tipping the scales at 87° in the River City. The added heat and sunshine early on will set the stage for the more active pattern settling in across the region Thursday evening.
The latest model data indicates that a line of showers and thunderstorms will begin developing over Central Missouri late tomorrow morning. This line will gain strength while marching eastward through the afternoon, passing over the Mississippi and eventually reaching the Tri-State early tomorrow evening. It looks as though the first of the storms may reach our westernmost communities just before 6PM Thursday. From there, the line will reach Evansville around 7:30 PM and Owensboro an hour later - the last of this line of storms will exit east of the Tri-State by 10PM. Some of the cells embedded within this line may produce strong winds and large hail. Unfortunately, this only represents the first round of our potentially Severe storms.
A secondary cluster of storms will begin to develop over the Kansas/Missouri boarder around dinnertime Thursday evening, but won't reach the Tri-State until the predawn hours Friday. Current model data suggests that the first of these storms will reach portions of our Illinois Counties between 12AM and 1 AM Friday morning. It's expected that this cluster will jell into a well-developed line of storms capable of producing damaging straight-line winds, large hail and even brief tornadic rotation during the ensuing hours. The last of the significant or potentially Severe storms should exit southeast of the region between 6AM and 7 AM Friday morning. Obviously, the early morning timeline of this secondary system poses an even greater threat to the Tri-State, so it's important you have either a weather radio programed for Thursday night, or the Storm Team 44 App downloaded and ready to go in case any warning is issued for your location.