winter storm
Winter storm continues through Friday morning.
What:
Total snowfall amounts are expected to range from near 10 cm toward the shore of Lake Superior, including Wawa, to 15 to 20 cm for areas inland and over the higher terrain.
Reduced visibility in heavy snow and blowing snow.
When:
Continuing through Friday morning.
Additional information:
Rain has changed over to snow this evening as temperatures rapidly fell below the freezing mark. In addition, northerly winds gusting 50 to 60 km/h will result in blowing snow. The combination of heavy snow and blowing snow may result in near zero visibility at times.
Conditions will improve from west to east through Friday morning.
###
Travel will likely be challenging. Road closures are possible.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.
For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.
From: Dec 19, 2025 04:24
Until: Dec 19, 2025 19:03
winter storm
Winter storm continues through Friday morning.
What:
Total snowfall amounts are expected to range from near 10 cm toward the shore of Lake Superior, including Wawa, to 15 to 20 cm for areas inland and over the higher terrain.
Reduced visibility in heavy snow and blowing snow.
Flash freeze.
When:
Continuing through Friday morning.
Additional information:
Rain is expected to change over to snow this evening as temperatures rapidly fall below the freezing mark. In addition, northerly winds gusting 50 to 60 km/h will result in blowing snow. The combination of heavy snow and blowing snow may result in near zero visibility at times.
Conditions will improve from west to east through Friday morning.
###
Travel will likely be challenging. Road closures are possible.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.
For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.
From: Dec 18, 2025 23:09
Until: Dec 19, 2025 15:09
flash freeze
Flash freeze tonight into Friday morning.
What:
Temperatures are forecast to fall rapidly. Ponding water, slush, and any falling precipitation will freeze as the temperature drops.
When:
Tonight through Friday morning.
Additional information:
Rain will change over to snow tonight through Friday morning as temperatures rapidly fall below the freezing mark. Local snowfall amounts of 5 to 10 cm are expected.
Northerly winds gusting 50 to 60 km/h may result in blowing snow. The combination of snow and blowing snow may result in poor visibility at times.
###
Roads and walkways may quickly become icy and slippery. Icy surfaces will likely form quickly and could be difficult to detect.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.
For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.
From: Dec 18, 2025 20:00
Until: Dec 19, 2025 12:19
weather
Rain today, followed by a possible flash freeze tonight into Friday.
What:
Total rainfall amounts of 10 to 20 mm.
Flash freeze.
Local snowfall amounts of 5 to 10 cm from Montreal River to Earlton and north.
Reduced visibility in snow and blowing snow for some areas.
When:
This morning through Friday afternoon.
Additional information:
Rain will affect the area today before changing over to snow tonight through Friday morning as temperatures rapidly fall below the freezing mark.
Northerly winds gusting 50 to 60 km/h may result in blowing snow tonight into Friday.
Roads and walkways may become icy and slippery.
Travel may become difficult at times.
For information concerning flooding, please consult your local Conservation Authority or Ontario Ministry of Natural Resources office. Visit Ontario.ca/floods for the latest details.
###
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.
For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.
From: Dec 18, 2025 15:02
Until: Dec 19, 2025 07:02
winter storm
Winter storm expected through Friday morning.
What:
Total snowfall amounts are expected to range from 10 cm near the shore of Lake Superior, including Wawa, to 15 to 20 cm for areas inland and over the higher terrain.
Reduced visibility in heavy snow and blowing snow.
Flash freeze.
When:
Continuing through Friday morning.
Additional information:
Snow has changed over to periods of drizzle. A period of rain is expected beginning later this morning before changing back to snow late this afternoon into this evening as temperatures rapidly fall below the freezing mark. In addition, northerly winds gusting 50 to 60 km/h will result in blowing snow beginning this evening.
Conditions will improve from west to east through Friday morning.
###
Travel will likely be challenging. Road closures are possible.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.
For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.
From: Dec 18, 2025 13:40
Until: Dec 19, 2025 05:40
weather
Rain today, followed by a possible flash freeze tonight into Friday.
What:
Total rainfall amounts of 10 to 25 mm.
Flash freeze.
Local snowfall amounts of 5 to 10 cm.
Reduced visibility in snow and blowing snow.
When:
This morning through Friday afternoon.
Additional information:
Rain will affect the area this morning before changing over to snow overnight as temperatures rapidly fall below the freezing mark.
The higher rainfall amounts are expected from Elliot Lake to Greater Sudbury to North Bay. Snowfall amounts are expected to be variable across the area, with the highest accumulations from Montreal River to Earlton and north.
Northerly winds gusting 50 to 60 km/h will result in blowing snow tonight into Friday.
Roads and walkways may become icy and slippery.
Travel may become difficult at times.
For information concerning flooding, please consult your local Conservation Authority or Ontario Ministry of Natural Resources office. Visit Ontario.ca/floods for the latest details.
###
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.
For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.
From: Dec 18, 2025 11:17
Until: Dec 19, 2025 03:17
winter storm
Winter storm continues into Friday.
What:
Total snowfall amounts of 15 to 25 cm for higher terrain.
Reduced visibility in heavy snow and blowing snow.
Flash freeze.
When:
Continuing through Friday afternoon.
Additional information:
Snow, at times heavy, will transition to periods of rain or drizzle later this morning. The precipitation will change back to snow late this afternoon into this evening as temperatures rapidly fall below the freezing mark. In addition, northerly winds gusting 50 to 60 km/h will result in blowing snow beginning this evening.
Conditions will improve from west to east through Friday.
###
Travel will likely be challenging. Road closures are possible.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.
For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.
From: Dec 18, 2025 07:05
Until: Dec 19, 2025 02:59
winter storm
Winter storm conditions possible today into Friday.
What:
Total snowfall amounts of 15 to 25 cm for higher terrain north of Wawa, and north of Chapleau to Cochrane.
Reduced visibility in heavy snow and blowing snow.
Flash freeze.
When:
This afternoon through Friday afternoon.
Additional information:
Periods of light snow with a risk of freezing drizzle this morning will transition to periods of rain or drizzle later this morning. Precipitation will change back to snow late this afternoon into this evening as temperatures rapidly fall below the freezing mark. In addition, northerly winds gusting 50 to 60 km/h will result in blowing snow beginning tonight.
For areas from Wawa to Cochrane and south, snowfall amounts are expected to range from 5 to 15 cm.
Conditions will improve from west to east through Friday.
###
Roads and walkways may be difficult to navigate. Visibility may be suddenly reduced to near zero at times.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.
For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.
From: Dec 18, 2025 05:31
Until: Dec 18, 2025 21:31
flash freeze
Temperatures are forecast to fall rapidly. Ponding water, slush, and any falling precipitation will freeze as the temperature drops.
What:
Temperatures rapidly falling below freezing leading to icy conditions.
When:
Early Wednesday morning.
Additional information:
A sharp cold front will push through the area Wednesday morning leading to a rapid drop in temperatures to below the freezing mark.
###
Roads and walkways may quickly become icy and slippery. Icy surfaces will likely form quickly and could be difficult to detect.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.
For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.
From: Dec 17, 2025 02:26
Until: Dec 17, 2025 11:26
flash freeze
Temperatures are forecast to fall rapidly. Ponding water, slush, and any falling precipitation will freeze as the temperature drops.
What:
Temperatures rapidly falling below freezing leading to icy conditions.
When:
This evening into tonight.
Additional information:
Temperatures are expected to reach the low to mid single digits this afternoon into this evening. A sharp cold front will push through the area this evening leading to a rapid drop in temperatures to below the freezing mark. Overnight lows are expected to be anywhere from -10 to -18 degrees Celsius.
###
Roads and walkways may quickly become icy and slippery. Icy surfaces will likely form quickly and could be difficult to detect.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.
For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.
From: Dec 16, 2025 20:05
Until: Dec 17, 2025 05:15
snow squall
Lake effect snow squalls continuing into this afternoon.
What:
Total snowfall amounts of 15 to 30 cm.
Significantly reduced visibility in heavy snow.
When:
Continuing into this afternoon.
Additional information:
Lake effect snow squalls will likely move south of Agawa Bay later this afternoon.
Highway 17 closures are in effect from Wawa to Batchawana Bay.
###
Travel will likely be hazardous. Roads and walkways will likely be difficult to navigate due to accumulating snow.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.
For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.
From: Dec 13, 2025 10:32
Until: Dec 13, 2025 22:02
snow squall
Lake effect snow squalls continuing into this afternoon.
What:
Total snowfall amounts of 15 to 30 cm.
Significantly reduced visibility in heavy snow.
When:
Continuing into this afternoon.
Additional information:
Lake effect snow squalls will likely move south of Agawa Bay this afternoon.
Highway 17 closures are in effect from Wawa to Batchawana Bay.
###
Travel will likely be hazardous. Visibility will likely be suddenly reduced to near zero at times. Roads and walkways will likely be difficult to navigate due to accumulating snow.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.
For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.
From: Dec 13, 2025 13:19
Until: Dec 13, 2025 22:01
snow squall
Lake effect snow squall continuing into tonight.
What:
Snowfall amounts of 15 to 20 cm.
Low visibility in areas of heavy snow.
When:
Continuing into tonight.
Additional information:
A weather system will bring snow to a large portion of northern Ontario. Embedded lake effect snow in the southwest winds ahead of this weather system will lead to enhanced snowfall totals for areas near Lake Superior.
As the weather system passes to the east tonight, winds will become more northwesterly, shifting the lake effect snow to areas south of Wawa.
Travel along portions of Highway 17 could be hazardous at times. Prepare for quickly changing and deteriorating travel conditions.
###
Travel will likely be hazardous. Roads and walkways will likely be difficult to navigate due to accumulating snow. Road closures are possible.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.
For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.
From: Dec 12, 2025 21:17
Until: Dec 13, 2025 05:09
snow squall
Snow squalls continuing today.
What:
Total snowfall amounts of 15 to 25 cm with locally higher amounts possible.
Significantly reduced visibility in heavy snow and local blowing snow.
When:
Ending early this evening.
Additional information:
Lake effect snow will be accompanied by southwesterly winds gusting up to 50 km/h. As a result, blowing snow will further reduce visibility. Travel along portions of highway 17 and highway 101 may be hazardous.
###
Travel will likely be hazardous. Visibility will likely be suddenly reduced to near zero at times. Road closures are possible.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.
For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.
From: Dec 09, 2025 15:48
Until: Dec 10, 2025 02:03
snow squall
Snow squalls continuing today.
What:
Total snowfall amounts of 20 to 40 cm with locally higher amounts possible. Significantly reduced visibility in heavy snow and local blowing snow.
When:
Ending early this evening.
Additional information:
Lake effect snow will be accompanied by southwesterly winds gusting up to 50 km/h. As a result, blowing snow will further reduce visibility. Travel along portions of highway 17 and highway 101 may be hazardous.
###
Travel will likely be hazardous. Visibility will likely be suddenly reduced to near zero at times. Road closures are possible.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.
For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.
From: Dec 09, 2025 15:50
Until: Dec 10, 2025 02:03
snow squall
Snow squalls continuing today.
What:
Total snowfall amounts of 20 to 40 cm with locally higher amounts possible. Significantly reduced visibility in heavy snow and local blowing snow.
When:
Ending this afternoon.
Additional information:
Lake effect snow will be accompanied by southwesterly winds gusting up to 50 km/h. As a result, blowing snow will further reduce visibility. Travel along portions of highway 17 and highway 101 may be hazardous.
###
Travel will likely be hazardous. Visibility will likely be suddenly reduced to near zero at times. Road closures are possible.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.
For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.
From: Dec 09, 2025 10:27
Until: Dec 10, 2025 02:02
snow squall
Snow squalls continuing today.
What:
Total snowfall amounts of 10 to 20 cm with locally higher amounts possible.
Significantly reduced visibility in heavy snow and local blowing snow.
When:
Ending this afternoon.
Additional information:
Lake effect snow will be accompanied by southwesterly winds gusting up to 50 km/h. As a result, blowing snow will further reduce visibility. Travel along portions of highway 17 and highway 101 may be hazardous.
###
Travel will likely be hazardous. Visibility will likely be suddenly reduced to near zero at times. Road closures are possible.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.
For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.
From: Dec 09, 2025 10:26
Until: Dec 10, 2025 02:01
snow squall
Snow squalls expected.
What:
Total snowfall amounts of 10 to 20 cm with locally higher amounts possible.
Significantly reduced visibility in heavy snow and local blowing snow.
When:
Tonight through Tuesday afternoon.
Additional information:
Snow squalls are expected to develop ahead of an Alberta clipper tonight. Lake effect snow will be accompanied by southwesterly winds gusting up to 50 km/h. As a result, blowing snow will further reduce visibility. Travel along portions of highway 17 and highway 101 may be hazardous.
###
Travel will likely be hazardous. Visibility will likely be suddenly reduced to near zero at times. Road closures are possible.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.
For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.
From: Dec 09, 2025 02:17
Until: Dec 09, 2025 18:17
snow squall
Snow squalls expected.
What:
Total snowfall amounts of 20 to 40 cm with locally higher amounts possible. Significantly reduced visibility in heavy snow and local blowing snow.
When:
Tonight through Tuesday afternoon.
Additional information:
Snow squalls are expected to develop ahead of an Alberta clipper tonight. Lake effect snow will be accompanied by southwesterly winds gusting up to 50 km/h. As a result, blowing snow will further reduce visibility. Travel along portions of highway 17 and highway 101 may be hazardous.
###
Travel will likely be hazardous. Visibility will likely be suddenly reduced to near zero at times. Road closures are possible.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.
For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.
From: Dec 09, 2025 02:15
Until: Dec 09, 2025 18:15
