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
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 08, 2025 15:59
air quality
Smoke is causing or expected to cause poor air quality and reduced visibility.
High levels of air pollution due to smoke from forest fires are expected to persist into Sunday.
###
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 08, 2025 05:59
Until: Jun 08, 2025 15:59
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.
Wildfire smoke is expected over the area this morning into early afternoon.
###
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 06, 2025 08:30
Until: Jun 06, 2025 19:59
air quality
Smoke is causing or expected to cause poor air quality and reduced visibility.
Wildfire smoke is expected over the area tonight into Friday morning.
###
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 06, 2025 11:36
fog
Near zero visibility in fog is expected or occurring over some areas.
Fog is expected to lift later this morning.
###
Visibility may be significantly and suddenly reduced to near zero. Travel is expected to be hazardous due to reduced visibility in some locations.
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: May 29, 2025 12:43
Until: May 29, 2025 19:23
fog
Near zero visibility in fog is expected or occurring over some areas.
###
Visibility may be significantly and suddenly reduced to near zero. Travel is expected to be hazardous due to reduced visibility in some locations.
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: May 29, 2025 14:35
Until: May 29, 2025 19:23
fog
Visibilities have improved and are no longer expected to meet fog advisory criteria.
###
From: May 06, 2025 11:51
Until: May 29, 2025 16:00
weather
Rain, at times heavy.
What:
Rain. Additional rainfall amounts of 20 to 40 mm.
Timing:
Continuing through Friday.
Additional information:
Rain associated with a slow moving low pressure system will continue to the affect the region into Friday. Rainfall amounts of 15 to 40 mm have been reported over some areas.
Localized flooding in low-lying areas is possible.
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.
From: May 23, 2025 03:04
Until: May 23, 2025 19:04
weather
What:
Rain, at times heavy.
Hazard:
Additional rainfall amounts of 20 to 40 mm.
Timing:
This evening through Friday.
Additional information:
Rain associated with a slow moving low pressure system will continue into Friday. 15 to 30 mm of rainfall with locally higher amounts have been reported since last night. Additional rainfall amounts of 20 to 40 mm are expected by Friday evening.
Localized flooding in low-lying areas is possible.
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.
From: May 22, 2025 22:15
Until: May 23, 2025 14:15
rainfall
What:
Rain, at times heavy.
Hazard:
Total rainfall amounts of 50 to 60 mm.
Timing:
Through this afternoon.
Additional information:
Near 35 mm of rain has been reported as of this morning in this area. An additional 20 mm of rain is expected for areas east of the Don Valley Parkway before rain tapers to showers this evening.
Rain is expected to continue into Friday with some additional amounts.
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.
###
Localized flooding in low-lying areas 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: May 22, 2025 18:53
Until: May 23, 2025 06:52
rainfall
###
Localized flooding in low-lying areas 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: May 22, 2025 18:08
Until: May 23, 2025 06:07
rainfall
What:
Rain, at times heavy.
Hazard:
Total rainfall amounts of 50 to 60 mm.
Timing:
Through this afternoon.
Additional information:
Near 35 mm of rain has been reported as of this morning in this area. An additional 20 mm of rain is expected for areas east of the Don Valley Parkway before rain tapers to showers this evening.
###
Localized flooding in low-lying areas 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: May 22, 2025 18:08
Until: May 23, 2025 06:07
Beach Hazards Statement
* WHAT...Strong currents and dangerous swimming conditions.
* WHERE...Beaches of Niagara, Orleans, and Monroe counties.
* WHEN...Until 6 AM EDT Thursday.
* IMPACTS...Strong currents and dangerous swimming conditions.
From: May 22, 2025 02:16
Until: May 22, 2025 10:00
frost
Temperatures are expected to drop to near the freezing mark early this morning.
###
Frost advisories are issued when temperatures are expected to reach the freezing mark during the growing season, leading to potential damage and destruction to plants and crops.
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: May 20, 2025 08:47
Until: May 20, 2025 14:06
frost
Temperatures are expected to drop to near the freezing mark overnight into Tuesday morning.
###
Frost advisories are issued when temperatures are expected to reach the freezing mark during the growing season, leading to potential damage and destruction to plants and crops.
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: May 19, 2025 20:35
Until: May 20, 2025 12:35
Frost Advisory
* WHAT...Temperatures in the mid and upper 30s will result in frost
formation.
* WHERE...Niagara, Orleans, and Monroe Counties. The greatest threat
for frost will be well inland away from the cities and Lake
Ontario.
* WHEN...From 2 AM to 8 AM EDT Tuesday.
* IMPACTS...Frost could kill sensitive outdoor vegetation if left
unprotected.
From: May 19, 2025 16:42
Until: May 20, 2025 12:00
squall
Conditions are favourable for the development of squalls with wind gusts up to 40 knots, frequent lightning, hail and poor to very poor visibility in thunderstorms heavy at times.
Thunderstorms are expected today until late this afternoon.
###
Proceed with caution as visibility may suddenly be reduced to near zero.
Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.
From: May 17, 2025 14:41
Until: May 18, 2025 01:00
thunderstorm
At 1:16 p.m. EDT, Environment Canada meteorologists are tracking a severe thunderstorm capable of producing strong wind gusts, up to toonie size hail and heavy rain.
###
Heavy rain may cause flash flooding and significant reductions to visibility. Large hail may cause significant damage and injury.
Severe thunderstorm warnings are issued when imminent or occurring thunderstorms are expected to produce damaging hail, wind or rain.
From: May 17, 2025 17:16
Until: May 17, 2025 19:25
thunderstorm
At 1:16 p.m. EDT, Environment Canada meteorologists are tracking a severe thunderstorm capable of producing strong wind gusts, up to toonie size hail and heavy rain.
This cluster of severe thunderstorms is located near Argyle, moving northeast at 45 km/h.
Hazard: Toonie size hail.
Locations impacted include:
Fenelon Falls, Balsam Lake Provincial Park, Indian Point Provincial Park, Argyle, Eldon, Woodville, Kirkfield, Mitchell Lake, Grasshill, Glenarm, West Bay, South Bay, Balsam Lake, Rosedale and Cameron Lake.
###
Heavy rain may cause flash flooding and significant reductions to visibility. Large hail may cause significant damage and injury.
Severe thunderstorm warnings are issued when imminent or occurring thunderstorms are expected to produce damaging hail, wind or rain.
From: May 17, 2025 17:16
Until: May 17, 2025 19:25
thunderstorm
At 1:09 p.m. EDT, Environment Canada meteorologists are tracking a severe thunderstorm capable of producing strong wind gusts, up to toonie size hail and heavy rain.
###
Heavy rain may cause flash flooding and significant reductions to visibility. Large hail may cause significant damage and injury.
Severe thunderstorm warnings are issued when imminent or occurring thunderstorms are expected to produce damaging hail, wind or rain.
From: May 17, 2025 17:09
Until: May 17, 2025 19:18
thunderstorm
At 1:09 p.m. EDT, Environment Canada meteorologists are tracking a severe thunderstorm capable of producing strong wind gusts, up to toonie size hail and heavy rain.
This cluster of severe thunderstorms is located near Brock, moving northeast at 40 km/h.
Hazard: Toonie size hail.
Locations impacted include:
Cannington, Brock, Argyle, Eldon, Woodville, Grasshill and Glenarm.
###
Heavy rain may cause flash flooding and significant reductions to visibility. Large hail may cause significant damage and injury.
Severe thunderstorm warnings are issued when imminent or occurring thunderstorms are expected to produce damaging hail, wind or rain.
From: May 17, 2025 17:09
Until: May 17, 2025 19:18
thunderstorm
At 12:56 p.m. EDT, Environment Canada meteorologists are tracking a severe thunderstorm capable of producing strong wind gusts, up to toonie size hail and heavy rain.
This cluster of severe thunderstorms is located near Pefferlaw, moving northeast at 40 km/h.
Hazard: Toonie size hail.
Locations impacted include:
Sunderland, Cannington, Pefferlaw, Brock, Argyle, Eldon, Woodville, Kirkfield, Grasshill and Glenarm.
###
Heavy rain may cause flash flooding and significant reductions to visibility. Large hail may cause significant damage and injury.
Severe thunderstorm warnings are issued when imminent or occurring thunderstorms are expected to produce damaging hail, wind or rain.
From: May 17, 2025 16:56
Until: May 17, 2025 19:05
squall
Squalls with wind gusts up to 40 knots, frequent lightning, hail of 1 to 2 centimetres and poor to very poor visibility in thunderstorms heavy at times are expected or occurring in the area.
Thunderstorms are expected early this afternoon as they move eastward across <lake Simcoe.
###
Proceed with caution as visibility may suddenly be reduced to near zero.
Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.
From: May 17, 2025 15:55
Until: May 17, 2025 18:24
squall
###
From: May 17, 2025 15:55
Until: May 17, 2025 15:55
squall
Conditions are favourable for the development of squalls with wind gusts up to 40 knots, frequent lightning and poor to very poor visibility in thunderstorms heavy at times.
Thunderstorms are expected to develop over Michigan and track over the area later this evening. The squall threat should end by Saturday morning.
###
Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.
From: May 16, 2025 21:53
Until: May 17, 2025 13:53
squall
Conditions are favourable for the development of squalls with wind gusts up to 40 knots, frequent lightning and poor to very poor visibility in showers heavy at times.
Thunderstorms are expected to track northeast across the area over the next few hours. The squall threat should end this morning.
###
Proceed with caution as visibility may suddenly be reduced to near zero.
Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.
From: May 17, 2025 04:47
Until: May 17, 2025 13:02
squall
Squalls are no longer expected over the area.
###
From: May 17, 2025 08:07
Until: May 17, 2025 09:07
squall
Squalls with wind gusts up to 40 knots and frequent lightning 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: May 16, 2025 08:24
Until: May 16, 2025 11:22
squall
Squalls with wind gusts up to 40 knots and frequent lightning are expected or occurring in the area.
At 4:24 a.m. EDT, a line of thunderstorms is located from Selkirk to the international border, moving east at 40 knots.
###
Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.
From: May 16, 2025 08:24
Until: May 16, 2025 11:22
squall
Squalls have weakened or moved out of the area.
###
From: May 16, 2025 09:44
Until: May 16, 2025 10:44
squall
Squalls with wind gusts up to 45 knots, frequent lightning and hail of 1 to 2 centimetres are expected or occurring in the area.
At 2:36 a.m. EDT, a line of thunderstorms is located from 16 nautical miles west of Port Stanley to Erieau, moving east at 45 knots.
###
Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.
From: May 16, 2025 06:36
Until: May 16, 2025 09:34
squall
Squalls with wind gusts up to 45 knots, frequent lightning and hail of 1 to 2 centimetres 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: May 16, 2025 06:36
Until: May 16, 2025 09:34
frost
###
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: May 10, 2025 03:49
Until: May 11, 2025 13:59
frost
Temperatures are expected to drop to 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: May 10, 2025 07:35
Until: May 11, 2025 13:59
frost
Temperatures are expected to drop to near the freezing mark tonight into early Sunday 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: May 10, 2025 19:25
Until: May 11, 2025 13:59
frost
Temperatures are expected to drop to near the freezing mark overnight into early Saturday 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: May 09, 2025 12:55
Until: May 10, 2025 13:59
frost
Patchy frost overnight into early Friday morning.
Temperatures are expected to drop to near the freezing mark overnight into early Friday 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: May 08, 2025 19:54
Until: May 09, 2025 11:54
fog
Dense fog has developed and as a result near zero visibility is expected through early this morning.
###
Travel is expected to be hazardous due to reduced visibility in some locations.
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: May 06, 2025 08:10
Until: May 06, 2025 14:08
fog
###
Travel is expected to be hazardous due to reduced visibility in some locations.
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: May 06, 2025 04:23
Until: May 06, 2025 10:21
