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The Strom Prediction Center of America has placed the entirety of Greater Lafayette under a Slight Risk for Severe Weather for late Wednesday afternoon and evening. The SPC made the designation in anticipation of a defined line of storms capable of generating both damaging winds and large hail during that period.
After an initial line of showers and a few thunderstorms late tomorrow morning and early afternoon, an inbound cold front interacting with our 80° temperatures at the surface will begin to generate a broken line of storms across parts of Central Illinois.
Current model data suggests that those cells will begin firing up west of I-55 in Illinois after 5:00 P.M. ET before reaching our westernmost counties between 7:00 P.M. ET and 8:00 P.M. ET tomorrow evening. The bowing line of storms is expected to continue to intensify as it swings eastward through Tippecanoe County at 9:00 P.M. ET.
The last of the rainfall is expected to pass east of the region between 10:00 P.M. ET and 11:00 P.M. ET late tomorrow evening. Again some of the cells embedded within tomorrow night’s line of storms may produce wind gusts in excess of 60 mph and hail larger than an inch in diameter. Due to the presence of a moderately strong upper-level jet stream, isolated tornadic rotation cannot be ruled out at this time.
Weather Team 18 will continue to have more information on Wednesday’s storms as it becomes available.