* WHAT. Minor flooding of small streams and low lying areas caused by excessive rainfall is expected. * WHERE. A portion of south central Montana, including the following counties, northwestern Carbon, southern Stillwater and central Sweet Grass. * WHEN. Until 1215 PM MDT Monday. * IMPACTS. Minor flooding in low-lying and poor drainage areas. Rises in small streams and normally dry coulees. Water may flow over roadways. * ADDITIONAL DETAILS. - At 533 AM MDT, 1 to 3 inches of rain has fallen since last evening in the advisory area. Light to occasional moderate rainfall continues early this morning, and is forecast to continue into mid day. This additional rainfall will likely produce minor flooding within the advisory area. - Additional rainfall amounts of half an inch to an inch are expected over the area. - Some locations that will experience flooding include. Red Lodge, Columbus, Joliet, Absarokee, Fishtail, Roscoe, Dean, Luther, Cooney Reservoir State Park, Nye, Roberts, Fox, Boyd and Mc Leod. - http://www.weather.gov/safety/flood