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.
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 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 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
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
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
###
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
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 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.
###
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.
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 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.
###
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.
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 9:14 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
heat
Dangerous heat and humidity beginning Sunday afternoon.
The first significant heat event of the season with dangerously hot and humid conditions will begin Sunday afternoon and is expected to continue into the week.
What:
Daytime highs of 31 to 36 degrees Celsius.
Humidex values of 40 to 45.
Overnight lows of 21 to 25 degrees Celsius, providing little relief from the heat.
When:
Sunday afternoon to 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 for 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 21, 2025 13:36
Until: Jun 22, 2025 18:51
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...From noon Sunday to 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 21, 2025 17:50
Until: Jun 22, 2025 10:00
thunderstorm
At 2:46 p.m. EDT, Environment Canada meteorologists are tracking a severe thunderstorm capable of producing very strong wind gusts and heavy rain.
###
Severe thunderstorm warnings are issued when imminent or occurring thunderstorms are expected to produce damaging hail, wind or rain.
From: Jun 21, 2025 18:46
Until: Jun 21, 2025 21:45
thunderstorm
At 2:46 p.m. EDT, Environment Canada meteorologists are tracking a severe thunderstorm capable of producing very strong wind gusts and heavy rain.
This line of severe thunderstorms is located near Owen Sound, moving southeast at 70 km/h.
Hazard: 90 km/h wind gusts.
Locations impacted include:
Owen Sound, Meaford, Morley, Walters Falls, Beaverdale, Fairmount, Kimberley, Duncan and Blue Mountains.
###
Severe thunderstorm warnings are issued when imminent or occurring thunderstorms are expected to produce damaging hail, wind or rain.
From: Jun 21, 2025 18:46
Until: Jun 21, 2025 21:45
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...From noon Sunday to 6 PM EDT Tuesday.
* IMPACTS...Hot temperatures and high humidity may cause heat
related illnesses to occur.
From: Jun 21, 2025 06:44
Until: Jun 21, 2025 20:00
Beach Hazards Statement
* WHAT...Strong currents and dangerous swimming conditions.
* WHERE...Beaches of Niagara and Orleans counties.
* WHEN...Until 5 AM EDT Friday.
* IMPACTS...Strong currents and dangerous swimming conditions.
From: Jun 20, 2025 03:03
Until: Jun 20, 2025 09:00
Wind Advisory
* WHAT...Southwest winds 15 to 30 mph with gusts up to 50 mph
expected.
* WHERE...Along the Lake Erie shoreline and inland across the
northern Niagara Frontier to Monroe County.
* WHEN...From 9 AM this morning to 8 PM EDT this evening.
* IMPACTS...Gusty winds will blow around unsecured objects. Fully
leafed tree limbs could be blown down and a few power outages may
result.
From: Jun 19, 2025 07:23
Until: Jun 19, 2025 20:00
Beach Hazards Statement
* WHAT...Strong currents and dangerous swimming conditions
expected.
* WHERE...Beaches of Niagara and Orleans counties.
* WHEN...From 11 AM EDT this morning through late tonight.
* IMPACTS...Strong currents and dangerous swimming conditions.
From: Jun 19, 2025 07:53
Until: Jun 19, 2025 20:00
squall
###
Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.
From: Jun 18, 2025 18:03
Until: Jun 18, 2025 22:03
squall
An area of thunderstorms has developed from Hamilton to St. Catharines. These thunderstorms are able to produce strong wind gusts up to 35 knots and are moving northeastwards at 15 knots.
###
Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.
From: Jun 18, 2025 18:03
Until: Jun 18, 2025 22:03
squall
Conditions are favourable for the development of squalls with wind gusts possibly exceeding 35 knots and hail.
Thunderstorms are expected to impact portions of eastern Lake Erie, eastern Lake Ontario as well as the St. Lawrence River later this afternoon and evening.
###
Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.
From: Jun 09, 2025 18:16
Until: Jun 10, 2025 06:01
Air Quality Alert
The New York State Department of Environmental Conservation at
Albany has issued an Air Quality Health Advisory for Fine
Particulates until midnight EDT Sunday night.
Air quality levels in outdoor air are predicted to be greater than
an Air Quality Index value of 100 for Fine Particulates. The Air
Quality Index...or AQI...was created as an easy way to correlate
levels of different pollutants to one scale. The higher the AQI
value...the greater the health concern.
When pollution levels are elevated...the New York State Department
of Health recommends that individuals consider limiting strenuous
outdoor physical activity to reduce the risk of adverse health
effects. People who may be especially sensitive to the effects of
elevated levels of pollutants include the very young and those with
pre-existing respiratory problems such as asthma or heart disease.
Those with symptoms should consider consulting their personal
physician.
For additional information, please visit the New York State
Department of Environmental Conservation website at,
https://on.ny.gov/nyaqi, or call the Air Quality Hotline at
1 800 5 3 5, 1 3 4 5.
From: Jun 07, 2025 21:43
Until: Jun 09, 2025 04:00
Air Quality Alert
The New York State Department of Environmental Conservation at
Albany has issued an Air Quality Health Advisory for Fine
Particulates until midnight EDT tonight.
Air quality levels in outdoor air are predicted to be greater than
an Air Quality Index value of 100 for Fine Particulates. The Air
Quality Index...or AQI...was created as an easy way to correlate
levels of different pollutants to one scale. The higher the AQI
value...the greater the health concern.
When pollution levels are elevated...the New York State Department
of Health recommends that individuals consider limiting strenuous
outdoor physical activity to reduce the risk of adverse health
effects. People who may be especially sensitive to the effects of
elevated levels of pollutants include the very young and those with
pre-existing respiratory problems such as asthma or heart disease.
Those with symptoms should consider consulting their personal
physician.
For additional information, please visit the New York State
Department of Environmental Conservation website at,
https://on.ny.gov/nyaqi, or call the Air Quality Hotline at
1 800 5 3 5, 1 3 4 5.
From: Jun 06, 2025 14:21
Until: Jun 07, 2025 14:30
air quality
Smoke is causing or expected to cause poor air quality and reduced visibility.
High risk air quality due to wildfire smoke is expected over the area into this evening.
Northerly winds this evening should improve air quality.
###
As smoke levels increase, health risks increase. Limit time outdoors. Consider reducing or rescheduling outdoor sports, activities and events.
You may experience mild and common symptoms such as eye, nose and throat irritation, headaches or a mild cough. More serious but less common symptoms include wheezing, chest pains or severe cough. If you think you are having a medical emergency, seek immediate medical assistance.
People more likely to be impacted by outdoor air pollution, including people aged 65 and older, pregnant people, infants and young children, people with an existing illness or chronic health condition, and people who work outdoors, should reduce or reschedule strenuous activities outdoors and seek medical attention if experiencing symptoms.
Visit http://www.airhealth.ca for information on how to reduce your health risk and your personal contribution to pollution levels, as well as for current and forecast AQHI values.
Please continue to monitor alerts and forecasts issued by Environment Canada.
From: Jun 07, 2025 01:46
Until: Jun 07, 2025 06:29
air quality
Smoke is causing or expected to cause poor air quality and reduced visibility.
###
As smoke levels increase, health risks increase. Limit time outdoors. Consider reducing or rescheduling outdoor sports, activities and events.
You may experience mild and common symptoms such as eye, nose and throat irritation, headaches or a mild cough. More serious but less common symptoms include wheezing, chest pains or severe cough. If you think you are having a medical emergency, seek immediate medical assistance.
People more likely to be impacted by outdoor air pollution, including people aged 65 and older, pregnant people, infants and young children, people with an existing illness or chronic health condition, and people who work outdoors, should reduce or reschedule strenuous activities outdoors and seek medical attention if experiencing symptoms.
Visit http://www.airhealth.ca for information on how to reduce your health risk and your personal contribution to pollution levels, as well as for current and forecast AQHI values.
Please continue to monitor alerts and forecasts issued by Environment Canada.
From: Jun 05, 2025 19:36
Until: Jun 07, 2025 06:29
