urn:oid:2.49.0.1.124.1093364441.2026cap-pac@canada.ca2026-04-17T22:05:52-00:00ActualUpdateEnv. Can. - Can. Met. Ctr. – MontréalPublicprofile:CAP-CP:0.4layer:SOREM:1.0layer:EC-MSC-SMC:1.0layer:EC-MSC-SMC:1.1layer:SOREM:2.0Service Notice – February 2026: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 2026, changes are expected to include... 1) ECCC's initiative to introduce free-form polygons to represent the true threat area of a weather hazard is tentatively set for Spring 2026 deployment. Data changes will appear in CAP following this deployment and 2) 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 – février 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 2026, il y aura des changements incluant... 1) l’initiative d’ECCC visant à introduire des polygones libres pour représenter la véritable zone de menace d’un danger météorologique devrait être déployée provisoirement au printemps 2026. Des changements de données apparaîtront dans le PAC à la suite de ce déploiement et 2) 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/cap-pac@canada.ca,urn:oid:2.49.0.1.124.3662888850.2026,2026-04-17T22:04:27-00:00en-CAMetsquallMonitorImmediateSevereLikelygeneral publicprofile:CAP-CP:Event:0.4squallSAMESVR2026-04-17T22:04:27-00:002026-04-17T22:03:00-00:002026-04-18T02:04:27-00:00Environment Canadasquall warning in effect
Squalls with wind gusts up to 45 knots and frequent lightning are expected or occurring in the area.
A line of thunderstorms located over Minnesota is moving northeast at 45 knots and is expected to move into Canadian waters by 6:30 PM EDT.
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Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.
Vessels without lightning protection should make their way to shore immediately. Mariners are advised to prepare for squalls. If underway, seek safe harbour immediately. Consider delaying or postponing travel in areas under the squall warning.
https://weather.gc.ca/layer:EC-MSC-SMC:1.0:Alert_Typewarninglayer:EC-MSC-SMC:1.0:Broadcast_Intrusivenolayer:SOREM:1.0:Broadcast_ImmediatelyNolayer:EC-MSC-SMC:1.1:Parent_URImsc/alert/environment/hazard/alert-3.0-ascii/consolidated-xml-2.0/20260417220427008/WH_13_73_CWTO/SQW/2201296241288689924202604170503_WH_13_73_CWTO/actual/en_proper_complete_u-fr_proper_complete_c/NinJolayer:EC-MSC-SMC:1.1:CAP_countA:17491 M:90559 C:102017profile:CAP-CP:0.4:MinorChangetextlayer:EC-MSC-SMC:1.0:Alert_Location_Statusactivelayer:EC-MSC-SMC:1.0:Alert_Namesquall warninglayer:EC-MSC-SMC:1.0:Alert_CoverageCanadian portion of the Great Lakes and the Ontario portion of the St. Lawrence Riverlayer:EC-MSC-SMC:1.1:Designation_CodeWH_13_73_CWTOlayer:SOREM:2.0:WirelessImmediateNolayer:EC-MSC-SMC:1.1:Alert_Location_Statusactivelayer:EC-MSC-SMC:1.1:Newly_Active_Areas002812layer:EC-MSC-SMC:1.1:Event_End_Time2026-04-18T02:00:00.000ZWestern Lake Superior48.0669,-89.5945 48.1835,-89.403 48.5683,-89.2676 48.6908,-88.7733 48.9251,-88.5584 49.1099,-88.2532 48.8971,-87.3117 48.8838,-86.7557 48.7501,-86.8376 47.9579,-87.4568 48.2999,-88.3529 48.2372,-88.6958 47.9684,-89.3076 48.0163,-89.4704 47.9759,-89.5495 48.0194,-89.6829 48.0669,-89.5945layer:EC-MSC-SMC:1.0:CLC002812profile:CAP-CP:Location:0.33558001profile:CAP-CP:Location:0.33558004profile:CAP-CP:Location:0.33558041profile:CAP-CP:Location:0.33558044profile:CAP-CP:Location:0.33558054profile:CAP-CP:Location:0.33558090fr-CAMetgrainsMonitorImmediateSevereLikelygrand publicprofile:CAP-CP:Event:0.4squallSAMESVR2026-04-17T22:04:27-00:002026-04-17T22:03:00-00:002026-04-18T02:04:27-00:00Environnement Canadaavertissement de grains en vigueur
Des grains accompagnés de rafales jusqu’à 45 noeuds et de nombreux éclairs sont attendus ou se produisent dans le secteur.
Une ligne d'orages située sur le Minnesota se déplace vers le nord-est à 45 noeuds et devrait gagner les eaux canadiennes d'ici 18h30 HAE.
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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.
Les bateaux sans dispositif de protection contre la foudre devraient rejoindre la rive immédiatement. Les navigateurs devraient se préparer à affronter des grains. Si vous naviguez déjà, cherchez un havre immédiatement. Envisagez la possibilité de retarder ou de reporter les déplacements dans les secteurs visés par l’avertissement de grains.
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