Overview
- Forecasters warn Monday could bring all hazards across the Chicago area, including tornadoes, damaging winds, large hail and heavy rain.
- Storms in the Chicago area are expected to start around 1 p.m. Monday, with threats lasting into the evening as the National Weather Service advises rescheduling outdoor plans.
- Most of the region is under an enhanced risk, which is level 3 of 5, placing Chicago on the northern edge with the highest tornado potential farther south in central and southern Illinois and southeastern Iowa.
- The forecast depends on morning storms, which could limit daytime heating and shift the strongest storms south and east if they linger or allow stronger local storms if they clear early.
- Heavy rain could drive new rises on the Rock, Fox and Des Plaines rivers, so people near those waterways should watch levels and review safe places, communication plans and supplies.