frost
Frost may damage some crops in frost-prone areas.
Temperatures near the freezing mark will continue early this morning.
###
Damage to plants, trees, and crops is 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.
From: Oct 29, 2025 08:53
Until: Oct 29, 2025 14:59
frost
Frost may damage some crops in frost-prone areas.
###
Damage to plants, trees, and crops is 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.
From: Oct 29, 2025 08:53
Until: Oct 29, 2025 14:59
frost
Frost may damage some crops in frost-prone areas.
Temperatures are expected to fall to near the freezing mark again tonight.
###
Damage to plants, trees, and crops is 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.
From: Oct 28, 2025 16:19
Until: Oct 29, 2025 12:51
frost
Frost may damage some crops in frost-prone areas.
Temperatures are expected to fall to near the freezing mark again tonight.
###
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.
From: Oct 28, 2025 13:11
Until: Oct 29, 2025 05:11
frost
Frost may damage some crops in frost-prone areas.
Temperatures are expected to fall to near the freezing mark again tonight into early Tuesday morning.
###
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.
From: Oct 27, 2025 16:14
Until: Oct 28, 2025 13:14
frost
Frost may damage some crops in frost-prone areas.
###
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.
From: Oct 27, 2025 21:14
Until: Oct 28, 2025 13:14
frost
Frost may damage some crops in frost-prone areas.
Temperatures are expected to fall to the freezing mark overnight into early Monday morning.
###
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.
From: Oct 26, 2025 14:34
Until: Oct 27, 2025 16:00
frost
Frost may damage some crops in frost-prone areas.
Temperatures are expected to remain near the freezing mark early this morning.
###
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.
From: Oct 27, 2025 10:40
Until: Oct 27, 2025 16:00
Beach Hazards Statement
* WHAT...Strong currents and dangerous swimming conditions.
* WHERE...Beaches of Niagara county.
* WHEN...Until 8 PM EDT this evening.
* IMPACTS...Strong currents and dangerous swimming conditions.
From: Sep 20, 2025 14:02
Until: Sep 20, 2025 22:15
Beach Hazards Statement
* WHAT...Strong currents and dangerous swimming conditions
expected.
* WHERE...Beaches of Niagara county.
* WHEN...Through this evening.
* IMPACTS...Strong currents and dangerous swimming conditions.
From: Sep 20, 2025 07:44
Until: Sep 20, 2025 18:00
fog
Near zero visibility in fog is expected or occurring over some areas.
###
Visibility may be significantly and suddenly reduced to near zero.
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.
From: Sep 18, 2025 12:28
Until: Sep 18, 2025 15:59
fog
Near zero visibility in fog is expected or occurring over some areas.
Areas of dense fog will dissipate later this morning.
###
Visibility may be significantly and suddenly reduced to near zero.
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.
From: Sep 18, 2025 10:23
Until: Sep 18, 2025 15:59
fog
Visibilities have improved and are no longer expected to meet fog advisory criteria.
###
From: Sep 18, 2025 13:36
Until: Sep 18, 2025 14:36
fog
Near zero visibility in fog is expected or occurring over some areas.
Fog is expected to dissipate later this morning.
###
Visibility may be significantly and suddenly reduced to near zero. Travel is expected to be hazardous due to reduced visibility.
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.
From: Sep 13, 2025 10:44
Until: Sep 13, 2025 16:59
fog
Near zero visibility in fog is expected or occurring.
Fog is expected to dissipate this morning.
###
Visibility may be significantly and suddenly reduced to near zero.
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.
From: Sep 10, 2025 08:46
Until: Sep 10, 2025 15:01
weather
Strong winds expected on Friday.
What:
Strong winds with gusts of 70 to 90 km/h possible.
When:
Late Friday morning into Friday evening.
Additional Information:
Strong southwesterly winds will develop late Friday morning as a low pressure system pushes over northeastern Ontario.
Wind warnings may be needed for some areas as the event draws closer.
###
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.
From: Sep 04, 2025 21:04
Until: Sep 05, 2025 13:04
thunderstorm
At 3:19 p.m. EDT, Environment Canada meteorologists are tracking a severe thunderstorm capable of producing strong wind gusts and heavy rain.
###
Heavy rain may cause flash flooding and significant reductions to visibility.
Severe thunderstorm warnings are issued when imminent or occurring thunderstorms are expected to produce damaging hail, wind or rain.
From: Aug 12, 2025 19:19
Until: Aug 12, 2025 22:18
thunderstorm
At 3:19 p.m. EDT, Environment Canada meteorologists are tracking a severe thunderstorm capable of producing strong wind gusts and heavy rain.
This severe thunderstorm is located near Brooklin, moving east at 15 km/h.
Hazard: Heavy downpours with local rainfall amounts in excess of 50 mm and 90 km/h wind gusts.
Locations impacted include:
Brooklin, Coronation Gardens, Columbus, Mitchell's Corners, Solina, Enniskillen and Hampton.
###
Heavy rain may cause flash flooding and significant reductions to visibility.
Severe thunderstorm warnings are issued when imminent or occurring thunderstorms are expected to produce damaging hail, wind or rain.
From: Aug 12, 2025 19:19
Until: Aug 12, 2025 22:18
thunderstorm
At 2:31 p.m. EDT, Environment Canada meteorologists are tracking a severe thunderstorm capable of producing strong wind gusts and heavy rain.
This severe thunderstorm is located near Ashburn, moving east at 10 km/h.
Hazard: Heavy downpours with local rainfall amounts in excess of 50 mm and 90 km/h wind gusts.
Locations impacted include:
Ashburn, Prospect and Mount Carmel.
###
Heavy rain may cause flash flooding and significant reductions to visibility.
Severe thunderstorm warnings are issued when imminent or occurring thunderstorms are expected to produce damaging hail, wind or rain.
From: Aug 12, 2025 18:32
Until: Aug 12, 2025 21:30
thunderstorm
At 2:31 p.m. EDT, Environment Canada meteorologists are tracking a severe thunderstorm capable of producing strong wind gusts and heavy rain.
###
Heavy rain may cause flash flooding and significant reductions to visibility.
Severe thunderstorm warnings are issued when imminent or occurring thunderstorms are expected to produce damaging hail, wind or rain.
From: Aug 12, 2025 18:32
Until: Aug 12, 2025 21:30
thunderstorm
Severe thunderstorms have weakened or moved out of the region.
###
From: Aug 12, 2025 19:48
Until: Aug 12, 2025 20:48
Special Weather Statement
Webcams and satellite products show areas of fog across the
Niagara Frontier, including locations near the Niagara River and
along Interstate 90. Some of this fog is locally dense in spots
with visibilities down to a quarter mile or less.
If you will be travelling through this area overnight... be sure
to slow down and be prepared for rapid changes in visibility. The
fog is expected to dissipate after sunrise.
From: Jul 26, 2025 05:36
Until: Jul 26, 2025 12:00
heat
A prolonged period of extreme heat and humidity continues.
What:
Daytime highs of 31 to 35 degrees Celsius and a humidex of 37 to 42.
Overnight lows of 19 to 23 degrees Celsius, providing little relief from the heat.
When:
Continuing through to Thursday night.
Additional information:
Southern Ontario will experience hot and humid conditions now through much of this week. A shift in the weather pattern late this week will likely end this multi-day period of heat and humidity Thursday night.
###
For more information: https://www.canada.ca/en/health-canada/services/climate-change-health/extreme-heat/how-protect-yourself.html https://www.canada.ca/en/health-canada/services/climate-change-health/extreme-heat/who-is-at-risk.html
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.
From: Jul 14, 2025 19:09
Until: Jul 15, 2025 11:13
heat
A prolonged period of near heat warning levels continues.
What:
Daytime highs of 29 to 32 degrees Celsius and a humidex of 35 to 40.
Overnight lows of 19 to 23 degrees Celsius, providing little relief from the heat.
When:
Continuing possibly till Thursday.
Additional information:
This week southern Ontario will experience hot and humid conditions. The temperatures and humidex will meet or be extremely close to heat warning criteria, with the hottest day being Saturday. A shift in the weather pattern on Thursday will likely end this multi-day period of heat and humidity.
###
For more information: https://www.canada.ca/en/health-canada/services/climate-change-health/extreme-heat/how-protect-yourself.html https://www.canada.ca/en/health-canada/services/climate-change-health/extreme-heat/who-is-at-risk.html
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.
From: Jul 11, 2025 22:33
Until: Jul 12, 2025 18:41
heat
###
For more information: https://www.canada.ca/en/health-canada/services/climate-change-health/extreme-heat/how-protect-yourself.html https://www.canada.ca/en/health-canada/services/climate-change-health/extreme-heat/who-is-at-risk.html
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.
From: Jun 22, 2025 02:51
Until: Jul 12, 2025 18:41
Heat Advisory
* WHAT...Heat index values in the mid and upper 90s expected.
* WHERE...Niagara, Orleans, Monroe, Wayne, Northern Cayuga, Oswego,
Northern Erie, Genesee, Livingston, and Ontario Counties.
* WHEN...From noon today to 7 PM EDT this evening.
* IMPACTS...Hot temperatures and high humidity may cause heat
related illnesses to occur.
From: Jul 12, 2025 05:04
Until: Jul 12, 2025 17:15
squall
Squalls with wind gusts up to 35 knots, frequent lightning and poor to very poor visibility in thunderstorms heavy at times are expected or occurring in the area.
Thunderstorms near Long Point are moving slowly east towards Fort Erie.
###
Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.
From: Jul 12, 2025 05:59
Until: Jul 12, 2025 08:59
squall
Squalls with wind gusts up to 35 knots, frequent lightning and poor to very poor visibility in thunderstorms heavy at times are expected or occurring in the area.
###
Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.
From: Jul 12, 2025 05:59
Until: Jul 12, 2025 08:59
squall
Squalls have weakened or moved out of the area.
###
From: May 16, 2025 09:44
Until: Jul 12, 2025 08:15
heat
Humidex values reaching 40 are expected.
A heat event is expected Saturday to Sunday.
What:
Daytime highs of 31 to 33 degrees Celsius and a humidex of 40.
Overnight lows of 21 to 25 degrees Celsius, providing little relief from the heat.
When:
Saturday to Sunday, coming to an end Sunday night.
###
For more information: https://www.canada.ca/en/health-canada/services/climate-change-health/extreme-heat/how-protect-yourself.html https://www.canada.ca/en/health-canada/services/climate-change-health/extreme-heat/who-is-at-risk.html
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.
From: Jul 04, 2025 22:14
Until: Jul 05, 2025 16:58
heat
Humidex values reaching 40 are expected.
###
For more information: https://www.canada.ca/en/health-canada/services/climate-change-health/extreme-heat/how-protect-yourself.html https://www.canada.ca/en/health-canada/services/climate-change-health/extreme-heat/who-is-at-risk.html
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.
From: Jul 05, 2025 00:58
Until: Jul 05, 2025 16:58
thunderstorm
At 9:19 p.m. EDT, Environment Canada meteorologists are tracking a severe thunderstorm capable of producing very strong wind gusts and heavy rain.
This severe thunderstorm is located near Boyne Valley Provincial Park, moving east at 65 km/h.
Hazard: 100 km/h wind gusts and heavy rain. A tornado is also possible.
Locations impacted include:
Alliston, New Tecumseth, Boyne Valley Provincial Park, Mono Cliffs Provincial Park, Mono Centre, Mansfield, Earl Rowe Provincial Park, Beeton, Cookstown, Violet Hill, Woodside, Hockley, Everett, Borden, Loretto, Egbert, Thornton, Stroud and Deerhurst.
###
Local utility outages are likely. Heavy rain may cause flash flooding and significant reductions to visibility.
Severe thunderstorms can produce tornadoes.
From: Jun 28, 2025 01:20
Until: Jun 28, 2025 04:18
thunderstorm
At 9:19 p.m. EDT, Environment Canada meteorologists are tracking a severe thunderstorm capable of producing very strong wind gusts and heavy rain.
###
Local utility outages are likely. Heavy rain may cause flash flooding and significant reductions to visibility.
Severe thunderstorms can produce tornadoes.
From: Jun 28, 2025 01:20
Until: Jun 28, 2025 04:18
thunderstorm
At 9:14 p.m. EDT, Environment Canada meteorologists are tracking a line of severe thunderstorms capable of producing very strong wind gusts and heavy rain.
###
Local utility outages are likely. Heavy rain may cause flash flooding and significant reductions to visibility.
Severe thunderstorms can produce tornadoes.
From: Jun 28, 2025 01:14
Until: Jun 28, 2025 04:13
heat
The first significant heat event of the season ends tonight.
Additional Information:
###
For more information: https://www.canada.ca/en/health-canada/services/climate-change-health/extreme-heat/how-protect-yourself.html https://www.canada.ca/en/health-canada/services/climate-change-health/extreme-heat/who-is-at-risk.html
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.
From: Jun 25, 2025 04:52
Until: Jun 25, 2025 12:00
heat
The first significant heat event of the season with dangerously hot and humid conditions continues.
What:
Daytime highs of 30 to 35 degrees Celsius.
Humidex values of 40 to 45.
When:
Ending tonight.
Additional Information:
###
For more information: https://www.canada.ca/en/health-canada/services/climate-change-health/extreme-heat/how-protect-yourself.html https://www.canada.ca/en/health-canada/services/climate-change-health/extreme-heat/who-is-at-risk.html
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.
From: Jun 24, 2025 19:22
Until: Jun 25, 2025 11:33
heat
The first significant heat event of the season with dangerously hot and humid conditions will continue through Tuesday.
What:
Daytime highs of 32 to 36 degrees Celsius.
Humidex values of 42 to 46.
Overnight lows of 22 to 25 degrees Celsius, providing little relief from the heat.
When:
Now until Tuesday night.
Additional Information:
###
For more information: https://www.canada.ca/en/health-canada/services/climate-change-health/extreme-heat/how-protect-yourself.html https://www.canada.ca/en/health-canada/services/climate-change-health/extreme-heat/who-is-at-risk.html
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.
From: Jun 23, 2025 20:51
Until: Jun 24, 2025 12:53
Heat Advisory
* WHAT...Heat index values in the upper 90s expected.
* WHERE...All of western New York.
* WHEN...Until 6 PM EDT Tuesday.
* IMPACTS...Hot temperatures and high humidity may cause heat
related illnesses to occur.
* ADDITIONAL DETAILS...Overnight relief from the heat will be
minimal due to the warm night time temperatures, especially in
urban areas.
From: Jun 23, 2025 18:26
Until: Jun 24, 2025 10:00
heat
Conditions are no longer expected to reach heat warning criteria.
###
From: Jun 24, 2025 06:43
Until: Jun 24, 2025 07:43
heat
Dangerous heat and humidity continues.
The first significant heat event of the season with dangerously hot and humid conditions is expected to continue into the week.
What:
Daytime highs of 33 to 36 degrees Celsius.
Humidex values of 42 to 46.
Overnight lows of 22 to 25 degrees Celsius, providing little relief from the heat.
When:
Now until Tuesday night.
Additional information:
###
For more information: https://www.canada.ca/en/health-canada/services/climate-change-health/extreme-heat/how-protect-yourself.html https://www.canada.ca/en/health-canada/services/climate-change-health/extreme-heat/who-is-at-risk.html
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.
From: Jun 23, 2025 09:22
Until: Jun 24, 2025 01:31
heat
Dangerous heat and humidity will continue through early to mid week.
The first significant heat event of the season with dangerously hot and humid conditions is expected to continue into the week.
What:
Daytime highs of 33 to 36 degrees Celsius.
Humidex values of 42 to 46.
Overnight lows of 22 to 25 degrees Celsius, providing little relief from the heat.
When:
Now until Tuesday night.
Additional information:
The extreme heat and humidity may continue into Wednesday. A cold front is expected to push through the region late Tuesday, but there is some uncertainty with how far south this front will get. Should it remain farther north, the heat event may continue Wednesday, primarily for southwestern Ontario and the GTA.
###
For more information: https://www.canada.ca/en/health-canada/services/climate-change-health/extreme-heat/how-protect-yourself.html https://www.canada.ca/en/health-canada/services/climate-change-health/extreme-heat/who-is-at-risk.html
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.
From: Jun 22, 2025 20:45
Until: Jun 23, 2025 13:11
Heat Advisory
* WHAT...Heat index values in the upper 90s expected, with the
highest heat index values expected Monday.
* WHERE...All of western New York.
* WHEN...Until 6 PM EDT Tuesday.
* IMPACTS...Hot temperatures and high humidity may cause heat
related illnesses to occur.
* ADDITIONAL DETAILS...Overnight relief from the heat will be
minimal due to the warm night time temperatures, especially in
urban areas.
From: Jun 22, 2025 18:23
Until: Jun 23, 2025 10:00
