There's a couple of different weather advisories in effect for Greater Sudbury and vicinity this morning.
Environment Canada has issued a fog advisory for this area.
Near zero visibility in fog is expected or occurring, the notice said.
Dense fog will persist into this morning before becoming more patchy this afternoon.
If travelling, be prepared for areas of near-zero visibility. If visibility is reduced while driving, turn on your lights and maintain a safe following distance.
A special weather statement is also in effect for Greater Sudbury and vicinity.
Periods of rain, heavy at times, are expected to begin this morning and continue tonight.
Rainfall amounts in the 15 to 25 mm range are expected by early Friday morning. A few isolated thunderstorms are also possible today and tonight.
The heavy rain will combine with mild temperatures near 7 C to produce potentially significant snowmelt and localized ponding on streets and other low lying areas.
The heavy rain and mild temperatures are associated with a strong Colorado low that will transition across Northern Ontario tonight.