Overview
- Isolated to scattered thunderstorms tied to a cold front flared Monday evening from Missouri into Illinois and across the I-35/I-70 corridor, with large hail and damaging wind the main risks, according to the Storm Prediction Center and local forecasts.
- In the Chicago area, storms prompted several Severe Thunderstorm Warnings, an O’Hare ground stop and a Wrigley Field delay before a sharp cool-down moves in Tuesday.
- Colorado is under winter alerts for Tuesday into Wednesday, with mountain warnings calling for up to about 2 feet of heavy, wet snow and a watch for the Denver metro where 3 to 9 inches are possible.
- State officials warned that the worst travel impacts are likely during the Wednesday morning commute as roads turn slushy and that heavy snow could topple limbs and cause scattered power outages, with a hard freeze likely Wednesday night.
- Forecasters highlighted rapid temperature swings this week, with drops of about 20 degrees in Chicago and near 30 in Denver as colder air undercuts warm, humid air ahead of the front.