Overview
- Environment Canada warnings, in effect Monday, call for freezing rain starting overnight into Tuesday and lingering into Wednesday in Ottawa and Greater Sudbury.
- Forecasters say the Colorado Low will likely deliver two waves of precipitation with a several-hour lull Tuesday that may shift freezing rain to freezing drizzle.
- Areas that rise above 0 C could receive 20 to 40 millimetres of rain, raising the risk of localized flooding where drainage is poor.
- Untreated roads and sidewalks may ice over and the weight of glaze could strain trees and power lines, so drivers should slow down and households should charge devices and check on vulnerable neighbours.
- Freezing rain forms when rain melts aloft in warmer air then refreezes on near-freezing surfaces, a setup that small track shifts can flip between ice and plain rain.