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Chicago, surrounding areas at risk for severe storms tonight and Sunday

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Aided by a strong upper level jet, a surface cyclone is expected to undergo significant deepening or intensification between today and Sunday afternoon as it moves from the Rockies to the Ohio Valley and Great Lakes region.

During this time period, temperature and moisture values are expected to increase (plenty of potential energy available). As a result, there exist the potential for a widespread severe weather event to take place tonight through Sunday evening across the Ohio Valley, Great Lakes, and Lower Mississippi Valley regions.

According to several weather observations and models, conditions are expected to be conducive or help promote the development of supercells (discrete rotating storms) which would be capable for producing large hail and a few tornadoes. Additionally, the threat for a widespread damaging wind event is expected to take place during this previously mentioned timeframe.

There still remain some uncertainties such as the magnitude of atmospheric destabilization within the warm sector boundary layer. With that said, everyone should keep an eye out and stay weather aware should any severe weather take place.

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