McHenry County is a county located in the U.S. state of Illinois. According to the 2020 Census, it had a population of 310,229, making it the sixth-most populous county in Illinois. Its county seat is Woodstock. From Wikipedia
Over 23 million people are under a Level 3 severe weather risk as storms intensify, bringing potential EF-2 tornadoes, large hail, and damaging winds.
