20 for 20: Major Canadian cities set or eyeing new September records
Alerts in Effect
Special Weather StatementIssued at 02:02 Tuesday 21 September 2021
Significant rainfall expected to begin Tuesday evening. Rain will last into Wednesday and may continue in some areas through Wednesday night as well.
Hazard: Rainfall amounts of 30 to 50 mm possible by Wednesday morning. Areas with prolonged rainfall could see 70 to 100 mm by Thursday morning.
Timing: Beginning Tuesday evening, lasting into Wednesday and possibly continuing until Thursday.
Discussion: There is still considerable uncertainty and variability in the forecast model guidance with both the location of the heaviest rain and the duration of the rainfall event.
Rainfall Warnings will likely be issued for some areas as the event draws nearer.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@canada.ca or tweet reports using #ONStorm.