TULSA, Okla. — The severe weather system started in the southern Plains Monday night and moved to the northeast. Missouri and parts of Illinois and Arkansas are in the crosshairs Tuesday.    

By Wednesday the storm will move into Great Lakes region and weaken. But another storm system is gathering steam for later this week, potentially covering an area from Texas to Chicago.    

Patrick Marsh of the National Oceanic and Atmospheric Administration's Storm Prediction Center says eyewitnesses reported 26 tornadoes Monday and six more Tuesday. 

One, near Tulsa, was a mile wide and wind was reportedly in the range of 111 mph to 135 mph.