Tue-Wed, Aug 20-21st Severe T’Storm Threat Update #1

(8:00AM - 8/20/2019) Several disturbances and a front moving through the region will aide in a severe t'storm threat across portions of Central and Southern Illinois, for today through Wednesday.

8/20/19 - This Morning-Tonight Forecast...
A complex of rain and t'storms that originated in Iowa overnight, has now pushed into Northwest and Western Illinois this morning. This complex has been borderline severe, with a few isolated severe reports. This complex has been elevated, thus preventing a more significant severe threat. A gradual weakening trend has been noted as well, and this trend is expected to continue as this complex pushes across much of the state the rest of this morning and afternoon. Some re-strengthening of this complex may try to occur across portions of Eastern and Southern Illinois during the afternoon...However, this potential is uncertain at this time, thus will not introduce higher severe t'storm probabilities for this area at this time. An environment will be in place featuring high instability, high moisture and low shear. This will help support an isolated severe t'storm threat across much of the state, with damaging winds and large hail being the main threats.

Wednesday's potential severe t'storm threat will be discussed in future updates.

Below is the TAM severe t'storm forecast for this morning-tonight.

JP

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