Bruce County, Grey County, and Northern Wellington County may see significant ice accretion from freezing rain through the weekend.
Environment Canada says there is increased confidence that parts of Ontario will experience a widespread, prolonged freezing rain event starting late Friday and lasting through Monday.
Environment Canada has issued a special weather statement predicting general amounts of freezing rain between 5 to 15 mm. However, accretion amounts over 20 mm are possible over some areas. People should prepare for possible utility outages, slippery surfaces and broken tree branches from ice build-up.
There's also the possibility of local snowfall and ice pellet accumulations of 5 to 15 cm, but that's mainly for central and northeastern Ontario.
The swath of maximum ice accretion is still uncertain at this point, but confidence is highest for areas of central and eastern Ontario between Parry Sound and Kingston. Warnings will be issued as the event draws nearer.
