A powerful storm system is threatening the Midwest with tornadoes, hail, and damaging winds on Tuesday, with Chicago under an unusual early March severe weather risk. The National Weather Service warns that more than 70 million people across Texas, Oklahoma, Illinois, and surrounding states face potential impacts from this rare atmospheric setup.

Meteorologists describe the instability as uncommon for early March, with conditions more typical of late summer. The storm system follows a deadly wave of tornadoes last week that killed at least six people across Michigan and Oklahoma. Forecasters expect thunderstorms to develop by mid-afternoon, with the highest tornado risk concentrated in north-central Illinois, including Peoria and Joliet.

The severe weather threat extends through Wednesday, shifting eastward across the Mississippi Valley. While the immediate danger appears to be on a downward trend by Thursday, flash flooding remains a concern across multiple states. The unusual timing and intensity of this system has caught meteorologists' attention, as early March tornadoes in major metropolitan areas like Chicago are exceptionally rare.