Northeast Kansas saw hail, high winds and flash flooding — but no tornadoes — during the late afternoon and early evening of April 28.

The National Weather Service (NWS) has issued severe thunderstorm warnings and tornado watches for a few counties in northeast Kansas on Monday. Update 9:40 p.m.: The severe thunderstorm warning for Jefferson County has expired.

Millions in the Upper Midwest face the possibility of a severe thunderstorm outbreak Monday—the start of several days of extreme weather threats across the country this week.