Squall Watch

ECCC Toronto ON · CA

New

This event was updated at 2026-09-16 05:43:03 UTC.

English

Squall Watch In Effect

Event: Squall
Issued: 2026-09-16 02:00:56 UTC
Onset: 2026-09-16 03:00:00 UTC
Message expires: 2026-09-16 10:00:56 UTC
Expected end: 2026-09-16 08:00:00 UTC
Category: Meteorological
Urgency: Expected
Severity: Severe
Certainty: Possible
Response: Monitor

Description

Details

Conditions are favourable for the development of squalls with wind gusts up to 35 knots and frequent lightning. Thunderstorms over Michigan are expected to track over the area late this evening and overnight.

Impacts and guidance

Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.

Instructions

Mariners are advised to prepare for potential squalls. Vulnerable vessels are most at risk and should seek safe harbour if underway.

Affected areas

Western Lake Erie
Lake St. Clair

Public contact

Issuer: Environment Canada
Audience: General Public
Website: https://weather.gc.ca/

French

Veille De Grains En Vigueur En Vigueur

Event: Grains
Onset: 2026-09-16 03:00:00 UTC
Message expires: 2026-09-16 10:00:56 UTC
Expected end: 2026-09-16 08:00:00 UTC
Category: Meteorological
Urgency: Expected
Severity: Severe
Certainty: Possible
Response: Monitor

Description

Détails

Les conditions sont favorables à la formation de grains accompagnés de rafales soufflant jusqu’à 35 noeuds et de nombreux éclairs. Des orages sur le Michigan devraient se déplacer sur la région en fin de soirée et au cours de la nuit.

Impacts et conseils

Veuillez continuer à surveiller les alertes et les prévisions émises par Environnement Canada. Pour plus d’information, écoutez la station radio de la Garde côtière canadienne ou Radiométéo.

Instructions

Les navigateurs doivent être prêts à composer avec de possibles grains. Les bateaux vulnérables devraient se mettre à l’abri s’ils naviguent.

Affected areas

lac Érié Ouest
lac Sainte-Claire

Public contact

Issuer: Environnement Canada
Audience: Grand Public
Website: https://meteo.gc.ca/

Message record

Received: 2026-09-16 02:02:14 UTC
Issue to receipt: ~1m19s
CAP status: Actual
CAP message type: Alert
Lifecycle: New
Source: NAADS
Feed: NAADS Montréal
Recovered: No

CAP routing and identity

ULID: 01M2KZ6JTKM8ZW8Y8KGNMPC8A2
Identifier: urn:oid:2.49.0.1.124.1851552360.2026
Sender: cap-pac@canada.ca
Scope: Public
CAP source: Env. Can. - Can. Met. Ctr. – Montréal
Handling codes: profile:CAP-CP:0.4
layer:SOREM:1.0
layer:EC-MSC-SMC:1.0
layer:EC-MSC-SMC:1.1
layer:SOREM:2.0
Note: Service Notice – July 2026: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For Spring 2026, changes are expected to include... 1) ECCC's deployment to introduce free-form polygons to represent the true threat area of a weather hazard, which was originally scheduled for June 2026, is delayed. We will communicate the new date when it is available. Monitor https://dd.weather.gc.ca/doc/genots/ for notifications on the new launch date. Information about free-form polygons representing the true threat area of a weather hazard remains under media embargo until launch, 2) marine alerts will now be issued for smaller zone splits in certain areas of Atlantic and Pacific waters and 3) other minor improvements and corrections. For more information on these changes: https://comm.collab.science.gc.ca/mailman3/hyperkitty/list/dd_info@comm.collab.science.gc.ca/ | Notification de service – juillet 2026: Le service du PAC d’Environnement et Changement climatique Canada (ECCC) subit périodiquement des changements à mesure que le système d’alerte évolue. Pour le printemps 2026, il y aura des changements incluant... 1) Le déploiement par ECCC visant à introduire des polygones de forme libre pour représenter la zone réelle de menace d’un aléa météorologique, qui était initialement prévu pour juin 2026, est retardé. Nous communiquerons la nouvelle date lorsqu’elle sera disponible. Surveiller https://dd.weather.gc.ca/doc/genots/ pour les notifications concernant la nouvelle date de lancement. Les informations concernant les polygones de forme libre représentant la zone réelle de menace d’un aléa météorologique demeurent sous embargo médiatique jusqu’au lancement, 2) les alertes marines seront désormais émises pour des subdivisions de zones plus petites dans certaines régions des eaux de l’Atlantique et du Pacifique et 3) d’autres améliorations et corrections mineures. Pour plus d’informations sur ces changements: https://comm.collab.science.gc.ca/mailman3/hyperkitty/list/dd_info@comm.collab.science.gc.ca/
Issuing office: Ontario Storm Prediction Centre (CWTO)

English

Event codes

Name	Value
profile:CAP-CP:Event:0.4	squall
SAME	SVA

Parameters

Name	Value
layer:EC-MSC-SMC:1.0:Alert_Type	watch
layer:EC-MSC-SMC:1.0:Broadcast_Intrusive	no
layer:SOREM:1.0:Broadcast_Immediately	No
layer:EC-MSC-SMC:1.1:Parent_URI	msc/alert/environment/hazard/alert-3.0-ascii/consolidated-xml-2.0/20260916015905054/WH_13_73_CWTO/SQV/158063502047238003202609160503_WH_13_73_CWTO/actual/en_proper_complete_c-fr_proper_complete_c/NinJo
layer:EC-MSC-SMC:1.1:CAP_count	A:23773 M:122418 C:141594
layer:EC-MSC-SMC:1.0:Alert_Location_Status	active
layer:EC-MSC-SMC:1.0:Alert_Name	squall watch
layer:EC-MSC-SMC:1.0:Alert_Coverage	Canadian portion of the Great Lakes and the Ontario portion of the St. Lawrence River
layer:EC-MSC-SMC:1.1:Designation_Code	WH_13_73_CWTO
layer:SOREM:2.0:WirelessImmediate	No
layer:EC-MSC-SMC:1.1:Alert_Location_Status	active
layer:EC-MSC-SMC:1.1:Newly_Active_Areas	002212,002310
layer:EC-MSC-SMC:1.1:Event_End_Time	2026-09-16T08:00:00.000Z

French

Event codes

Name	Value
profile:CAP-CP:Event:0.4	squall
SAME	SVA

Parameters

Name	Value
layer:EC-MSC-SMC:1.0:Alert_Type	watch
layer:EC-MSC-SMC:1.0:Broadcast_Intrusive	no
layer:SOREM:1.0:Broadcast_Immediately	No
layer:EC-MSC-SMC:1.1:Parent_URI	msc/alert/environment/hazard/alert-3.0-ascii/consolidated-xml-2.0/20260916015905054/WH_13_73_CWTO/SQV/158063502047238003202609160503_WH_13_73_CWTO/actual/en_proper_complete_c-fr_proper_complete_c/NinJo
layer:EC-MSC-SMC:1.1:CAP_count	A:23773 M:122418 C:141594
layer:EC-MSC-SMC:1.0:Alert_Location_Status	active
layer:EC-MSC-SMC:1.0:Alert_Name	veille de grains
layer:EC-MSC-SMC:1.0:Alert_Coverage	secteur canadien des Grands Lacs et le secteur ontarien du fleuve Saint-Laurent
layer:EC-MSC-SMC:1.1:Designation_Code	WH_13_73_CWTO
layer:SOREM:2.0:WirelessImmediate	No
layer:EC-MSC-SMC:1.1:Alert_Location_Status	active
layer:EC-MSC-SMC:1.1:Newly_Active_Areas	002212,002310
layer:EC-MSC-SMC:1.1:Event_End_Time	2026-09-16T08:00:00.000Z

Locations

English

Location data

Western Lake Erie

Name	Value
layer:EC-MSC-SMC:1.0:CLC	002212
profile:CAP-CP:Location:0.3	3534020
profile:CAP-CP:Location:0.3	3534024
profile:CAP-CP:Location:0.3	3534030
profile:CAP-CP:Location:0.3	3534042
profile:CAP-CP:Location:0.3	3536020
profile:CAP-CP:Location:0.3	3537001
profile:CAP-CP:Location:0.3	3537003
profile:CAP-CP:Location:0.3	3537013
profile:CAP-CP:Location:0.3	3537016
profile:CAP-CP:Location:0.3	3537028

Polygons: 42.0512,-83.1462 42.0537,-83.1109 42.0629,-83.0565 42.0167,-82.9069 42.0946,-82.6165 42.2319,-82.3391 42.5988,-81.7125 42.784,-81.2109 42.66,-81.1553 42.2591,-80.9327 42.2075,-81.2457 41.6765,-82.3974 41.6765,-82.6797 41.8635,-83.0691 42.0409,-83.1496 42.0512,-83.1462

Location data

Lake St. Clair

Name	Value
layer:EC-MSC-SMC:1.0:CLC	002310
profile:CAP-CP:Location:0.3	3536020
profile:CAP-CP:Location:0.3	3537048
profile:CAP-CP:Location:0.3	3537064
profile:CAP-CP:Location:0.3	3538004

Polygons: 42.5527,-82.5993 42.5558,-82.5959 42.574,-82.5753 42.5798,-82.5688 42.5947,-82.5519 42.6139,-82.5225 42.6123,-82.5199 42.6113,-82.5182 42.6108,-82.5175 42.6095,-82.5154 42.5628,-82.5505 42.5505,-82.5386 42.5262,-82.515 42.5358,-82.4634 42.5188,-82.3954 42.3937,-82.3695 42.2795,-82.4137 42.2849,-82.5491 42.2679,-82.7164 42.3254,-82.9097 42.3377,-82.9189 42.3422,-82.9211 42.3485,-82.9249 42.3512,-82.9263 42.3586,-82.9303 42.3828,-82.8374 42.5447,-82.6736 42.5632,-82.6314 42.5592,-82.6191 42.5555,-82.6079 42.5527,-82.5993

French

Location data

lac Érié Ouest

Name	Value
layer:EC-MSC-SMC:1.0:CLC	002212
profile:CAP-CP:Location:0.3	3534020
profile:CAP-CP:Location:0.3	3534024
profile:CAP-CP:Location:0.3	3534030
profile:CAP-CP:Location:0.3	3534042
profile:CAP-CP:Location:0.3	3536020
profile:CAP-CP:Location:0.3	3537001
profile:CAP-CP:Location:0.3	3537003
profile:CAP-CP:Location:0.3	3537013
profile:CAP-CP:Location:0.3	3537016
profile:CAP-CP:Location:0.3	3537028

Polygons: 42.0512,-83.1462 42.0537,-83.1109 42.0629,-83.0565 42.0167,-82.9069 42.0946,-82.6165 42.2319,-82.3391 42.5988,-81.7125 42.784,-81.2109 42.66,-81.1553 42.2591,-80.9327 42.2075,-81.2457 41.6765,-82.3974 41.6765,-82.6797 41.8635,-83.0691 42.0409,-83.1496 42.0512,-83.1462

Location data

lac Sainte-Claire

Name	Value
layer:EC-MSC-SMC:1.0:CLC	002310
profile:CAP-CP:Location:0.3	3536020
profile:CAP-CP:Location:0.3	3537048
profile:CAP-CP:Location:0.3	3537064
profile:CAP-CP:Location:0.3	3538004

Polygons: 42.5527,-82.5993 42.5558,-82.5959 42.574,-82.5753 42.5798,-82.5688 42.5947,-82.5519 42.6139,-82.5225 42.6123,-82.5199 42.6113,-82.5182 42.6108,-82.5175 42.6095,-82.5154 42.5628,-82.5505 42.5505,-82.5386 42.5262,-82.515 42.5358,-82.4634 42.5188,-82.3954 42.3937,-82.3695 42.2795,-82.4137 42.2849,-82.5491 42.2679,-82.7164 42.3254,-82.9097 42.3377,-82.9189 42.3422,-82.9211 42.3485,-82.9249 42.3512,-82.9263 42.3586,-82.9303 42.3828,-82.8374 42.5447,-82.6736 42.5632,-82.6314 42.5592,-82.6191 42.5555,-82.6079 42.5527,-82.5993