Tuesday is expected to be a much warmer and very windy spring day, with winds gusting over 40 miles per hour at times. Temperatures have already warmed up into the lower 70s as highs will make a run for the upper 70s by the afternoon.
The threat of severe weather has prompted a 4WARN Weather Alert to be issued for Tuesday. Even outside of thunderstorms we could get winds gusts up to 40 miles per hour. A line of storms should develop and sweep from west to east across the area. The cluster of storms will move closer to our area by later this afternoon, but some models show this cluster weakening. The balmy and muggy conditions before a severe weather event come from the dew points and moisture that lies ahead of the actual front. A south wind pick up after 11AM with gust winds of 24 miles per hour in the afternoon. All modes are on the table, but damaging winds look to be the main threat. A line of storms will likely accompany the front. We will continue to tweak the forecast, and will have updates around the clock for you.
Following the nighttime storms, cold air will move into the Valley, and rain will turn to snow by late Wednesday morning. The greatest risk for severe weather will be east of I-57 in IL. The overnight low in the area was expected to bottom out at a frigid 28 degrees, well below normal and more than 35 degrees below the day's predicted high.
Rain should exit by mid Wednesday afternoon, followed by more windy conditions and falling temperatures through the remainder of the day.