Runoff from a combination of heavy rain and some mid elevation snow melt may cause minor flooding of streams and low lying areas near the foothills. * WHAT. Flooding caused by rain and snowmelt is possible. * WHERE. Portions of south central Montana, including the following areas, Bighorn Canyon, Pryor/Northern Bighorn Mountains and Southern Big Horn and north central Wyoming, including the following areas, Northeast Bighorn Mountains and Sheridan Foothills. * WHEN. From Sunday evening through Monday evening. * IMPACTS. Excessive runoff may result in minor flooding of streams and other low-lying and flood-prone locations close to the foothills. Some roads may become impassable. Now is the time to move equipment and livestock to higher ground away from waterways. Recent burn scars may be more susceptible to produce flooding, including the Elk west of Dayton and Sheridan. * ADDITIONAL DETAILS. - Rain and high elevation snow is expected to develop Sunday night and continue into Monday afternoon. Rainfall amounts are expected to range from 1 to 2 inches, while elevations above 6000 feet see heavy snow. There remains uncertainty regarding exact snow levels and how much snowmelt occurs with this system. Snow levels may fall enough to produce some wet snow at Story and Aberdeen Hill. - http://www.weather.gov/safety/flood