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(8:30PM - 5/5/19) A frontal boundary lingering across the state with disturbances moving through, will aide in promoting a very low end severe threat across portions of the state Monday and Tuesday.
Monday afternoon-night... A few scattered showers and isolated t'storms will be possible across Monday morning across portions of Northern Illinois. Additional scattered showers and t'storms will develop during the afternoon along a cold front moving southward across portions of Northern and Central Illinois. This activity will be in an environment featuring low instability, modest moisture and decent shear. This environment will help support a very low end strong to severe t'storm threat. Wind and hail will be the main threats with any strong to severe t'storm. This activity will persist across portions of Northern Illinois into the late afternoon, and across Central Illinois into Monday night. Tuesday afternoon-night... In the wake of early day showers and isolated t'storms, new development of scattered showers and t'storms will occur along a cold front across Southern Illinois. This activity will be in an environment featuring modest instability, modest moisture and decent shear. This environment will help support a very low end strong to severe t'storm threat. Wind and hail will be the main threats with any strong to severe t'storm. Activity will persist across Southern Illinois into Tuesday night. Below is our updated TAM severe weather forecasts for each day.
JP
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