A very strong cold front is expected to move across the area late Tonigh.
The National Weather Service says that gusty south winds will transport warm and humid air northward. The clash of the two air masses will result in thunderstorms moving into Southwest Indiana Tonight.
The best chance for severe storms will be between 4 p.m. and 4 a.m. EST across the coverage area. The storms will develop late in the afternoon across Southeast Missouri and Southwest Illinois and move northeast into the coverage area
The Storms Prediction Center has placed the entire area under a slight risk of severe weather for later today and tonight. The main threat for severe weather will be strong damaging straight line winds and isolated tornadoes. Also there is the possibility for heavy rainfall, which could lead to flooding issues across the area. A Flood Watch has been issued for Tuesday afternoon through late Tuesday night for Lawrence County, IL; Richland Co, IL; Knox, Co, IN; Daviess, CO, IN; and Martin Co, IN. Current weather models indicate 1 to 3 inches of rain is possible. Wind Advisories have been issued for Gibson, Pike and Dubois Counties. Stay tuned to HTN News and Weather for further weather updates.