Periods of rain will confine to areas south of a Frankfort to Alpena line tonight. Some of this rain may be heavy at times, especially during any thunderstorms. Shower and thunderstorm activity should taper late tonight into Monday. More showers and storms return later Monday night, lasting through Tuesday night, with heavy rainfall once again possible. * WHAT...Flooding caused by rain and snowmelt continues to be possible. * WHERE...Portions of Eastern Upper and Northern Lower Michigan, including the following areas, in Eastern Upper Michigan, Central Chippewa, Eastern Mackinac, Southeast Chippewa, Western Chippewa and Western Mackinac. In Northern Lower Michigan, Alcona, Alpena, Antrim, Arenac, Benzie, Charlevoix, Cheboygan, Crawford, Emmet, Gladwin, Grand Traverse, Iosco, Kalkaska, Leelanau, Manistee, Missaukee, Montmorency, Ogemaw, Oscoda, Otsego, Presque Isle, Roscommon and Wexford. * WHEN...Through Wednesday morning. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. * ADDITIONAL DETAILS... - http://www.weather.gov/safety/flood