A Rainfall Warning is in effect in the Dryden, Sioux Lookout and Ignace area.
Heavy rain and possible thunderstorms are expected throughout the day.
Total rainfall could hit 50-millimetres or more.
The heaviest rain will occur tonight into Tuesday.
Localized flooding in low-lying areas is possible and you are asked to watch for possible road washouts and closures.
No warning has been issued for the Red Lake area yet, but the district is also expected to receive significant rainfall.
