(11:45AM - 10/24/21) A storm system moving through the region will bring severe t'storm potential to portions of the state, through late tonight.
Summary... A storm system will move from the Plains this morning, into the Mid-Mississippi Valley and Midwest by tonight, and into the Great Lakes and Ohio Valley on Monday. This storm system will bring severe t'storm potential to portions of the state, through late tonight.
Forecast...
Sunday Morning - Sunday Night, Oct 24th... Widespread areas of rain and t'storms have been move much of Northern and Central Illinois, from late last night through this morning. This activity will continue to spread across Northern and Central Illinois through this afternoon. With a warm front expected to be meandering across Central Illinois and an associated marginal severe t'storm environment, an isolated severe t'storm will be possible across Central Illinois through this afternoon. The main focus will come a bit later, as scattered showers and t'storms that develop along and ahead of a cold front across Southern Iowa and Missouri this afternoon will sweep eastward, making it to the Missouri/Illinois border by late this afternoon and early this evening, and then spreading across Central and Southern Illinois late this afternoon through late tonight. Ahead of this activity, the environment across the state will be supportive of some severe t'storm threat. This environment will feature low instability of 500-2,000J/KG, dew points in the low to mid 60's, good forcing, and lapse rates of 5.5-7.0C. This environment will be supportive of upwards of a level 1/isolated to level 3/scattered severe t'storm risk across Central and Southern Illinois. All modes of severe weather will be possible...Including; Damaging winds, hail and tornadoes. Below is the severe t'storm forecast for this event.
JP
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