Issued 354 PM EDT Tue Sep 18 2018 Valid Wed Sep 19 2018 - Fri Sep 21 2018 ...Heavy rain is forecast for parts of the Northern Plains to Midwest... ...Flash flooding is possible in the Southwest U.S. as much above normal moisture streams in... ...Warmer than average temperatures are in place for the Central Plains to Ohio Valley... ...Conditions favorable for wildfires are forecast for parts of the Intermountain West... Over the next few days, the jet stream is expected to st...