9:30PM - 5/23/20) A compact and strong disturbance will be moving through the region on Saturday, which will bring a severe t’storm threat to a large portion of the state.
While a few isolated to scattered showers and t’storms are possible across the state Saturday morning, the main focus will be Saturday afternoon into evening. As a strong and compact disturbance moves in through the area, and arc of showers and t’storm are expected to develop Saturday afternoon, across Eastern Iowa into Northwest Illinois. This activity will then spread eastward across Northern Illinois and portions of Central Illinois, during the afternoon and evening. An environment expected to be in place that will feature low to moderate instability, good moisture, good shear and good forcing. This will all aide in upwards of a limited severe t’storm threat across Northern Illinois. All modes of severe weather will be possible. Things are being monitored for a potential upgrade in severe t'storm probabilities in future updates.
Additionally, scattered showers and t’storms will be possible across portions of Central and Southern Illinois, Saturday afternoon into early Saturday night. Less favorable conditions will exists across these areas...However, upwards of a minimal severe t'storm threat will exist for these areas. Things are being monitored for a potential upgrade in severe t'storm probabilities in future updates.
Below is the severe t’storm forecast for this event.
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