Freezing rain to hit Chicago area Sunday night

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"Snow will taper off to flurries on Wednesday", said a Sunday morning Environment Canada news release. Highs in the mid 40s, lows in the upper 20s.

A wintry mix is likely to pass through the region before changing into rain along the coast Tuesday. Heavy, wet snow will continue to fall through the rest of Monday evening. The snow map above shows what we see before the transition. Snow will move in from the southwest late Monday night to northeast Pennsylvania and central NY. Then our next round of snow showers begins to move in!

There could be periods of heavy snow during this period, creating low visibility and slippery conditions for the afternoon/evening commute on Tuesday. The snow may then change to ice pellets and freezing rain for a few hours Tuesday before changing back to snow by Tuesday night as colder air arrives in the wake of the low pressure system. The possibility of rain before temperatures go below freezing means pre-treating roads would be ineffective, since salt would be washed away.

Freezing rain shut everything down. That means we could see almost 12 hours of freezing rain adding up to a quarter of an inch of ice accumulation. There is a low chance for snow, but some sleet and freezing rain may occur. This is the scenario we fear may be possible by Tuesday.

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