The Storm Prediction Center of America has placed much of the western half of the Tri-State under a "1" and a "2" on the Threat Index for this evening. We're currently tracking a well defined line of thunderstorms spanning Central and Southern Illinois. This line will continue to track eastward toward the Tri-State in the coming hours; the first of the storms will reach our northwesternmost counties (Wayne and Richland Counties) by 8PM. From there the line will gradually expand east southeastward, affecting the areas west of Evansville.
It's expected that the line will weaken as it pushes further into the Tri-State; by the time it reaches Evansville (between 11PM and 12AM) the threat for Severe Weather will likely be concluding, though prior to that point storms embedded within the cluster may produce damaging winds in excess of 60 mph, large hail and even isolated tornadic rotation. Fortunately, the line of storms will eventually dissipate during the predawn hours Thursday, giving way to a quiet, yet warm start to the day.
Morning lows near 74° will make for a muggy and mild start to our Thursday. The heat and humidity aren't expected to go anywhere tomorrow; afternoon highs topping out near 90° will feel more like 97° or 98° at times. All that heat and humidity will interact with a stalled frontal boundary directly above the Tri-State, producing additional pop-up showers and storms south of the Ohio tomorrow afternoon.
Stay Safe and Wear Your Mask.