Issued 404 PM EDT Mon Sep 24 2018 Valid Tue Sep 25 2018 - Thu Sep 27 2018 ...A wet pattern is expected to continue over the eastern half of the country while dry conditions will persist in the western U.S.... ...Strong to possibly severe thunderstorms expected from the Midwest to the Great Lakes Tuesday and Wednesday ahead of a strong cold front... ...Threat of excessive rain over the Ohio Valley should gradually diminish on Tuesday... The upper-level pattern across the U.S. ...