Yellow Warning - Storm Surge

ECCC Vancouver BC · CA

Updated

English

Yellow Warning - Storm Surge - In Effect

Event: Storm Surge
Issued: 2026-09-21 02:49:03 UTC
Onset: 2026-09-21 02:45:00 UTC
Message expires: 2026-09-21 18:49:03 UTC
Expected end: 2026-09-22 06:00:00 UTC
Category: Environmental, Meteorological
Urgency: Immediate
Severity: Moderate
Certainty: Likely
Response: Monitor

Description

Details

A multi-day storm surge event continues for Herschel Island. Moderate flooding is expected during high tide through Monday morning, with maximum water levels reaching up to 25 cm above highest astronomical tide. Water levels are expected to recede Monday night. These conditions can cause damage to infrastructure near the coast, including boats beached or anchored along the shoreline.

Impacts and guidance

This warning is issued when high water levels pose a threat to coastal regions due to tides, storm surge and/or waves. Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to YTstorm@ec.gc.ca or post reports on social media using #YTStorm.

Affected areas

Coastline of Yukon incl. Herschel Island

Public contact

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

French

Avertissement Jaune - Submersion Côtière - En Vigueur

Event: Onde de tempête
Onset: 2026-09-21 02:45:00 UTC
Message expires: 2026-09-21 18:49:03 UTC
Expected end: 2026-09-22 06:00:00 UTC
Category: Environmental, Meteorological
Urgency: Immediate
Severity: Moderate
Certainty: Likely
Response: Monitor

Description

Détails

Une onde de tempête de plusieurs jours persiste sur l'île Herschel. On prévoit des inondations modérées pendant la marée haute jusqu'à lundi matin, les niveaux d'eau maximums atteignant jusqu'à 25 cm au-dessus de la marée astronomique la plus haute. Les niveaux d'eau devraient baisser lundi soir et dans la nuit de lundi à mardi. Ces conditions pourraient endommager les infrastructures près de la côte, notamment les bateaux échoués ou ancrés le long du littoral.

Impacts et conseils

Cet avertissement est émis lorsque des niveaux d’eau élevés constituent une menace pour les régions côtières en raison des marées, des ondes de tempête ou des vagues. Veuillez continuer à surveiller les alertes et les prévisions émises par Environnement Canada. Pour signaler du temps violent, envoyez un courriel à meteoYT@ec.gc.ca ou publiez un message sur les réseaux sociaux en utilisant #YTMeteo.

Affected areas

littoral du Yukon incl. l'île Herschel

Public contact

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

Message record

Received: 2026-09-21 02:50:33 UTC
Issue to receipt: ~1m30s
CAP status: Actual
CAP message type: Update
Lifecycle: Updated
Source: NAADS
Feed: NAADS Oakville
Recovered: No

CAP routing and identity

ULID: 01M30XYMG3C7BB05VN5SF542MD
Identifier: urn:oid:2.49.0.1.124.3354042797.2026
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: Pacific and Yukon Storm Prediction Centre (CWVR)

References

Identifier: urn:oid:2.49.0.1.124.4039360464.2026
Sender: cap-pac@canada.ca
Sent: 2026-09-18 12:33:39 UTC

Identifier: urn:oid:2.49.0.1.124.1799775999.2026
Sender: cap-pac@canada.ca
Sent: 2026-09-19 03:04:11 UTC

Identifier: urn:oid:2.49.0.1.124.4241966146.2026
Sender: cap-pac@canada.ca
Sent: 2026-09-19 03:07:41 UTC

Identifier: urn:oid:2.49.0.1.124.0663892254.2026
Sender: cap-pac@canada.ca
Sent: 2026-09-19 11:42:16 UTC

Identifier: urn:oid:2.49.0.1.124.2972234047.2026
Sender: cap-pac@canada.ca
Sent: 2026-09-19 20:55:31 UTC

Identifier: urn:oid:2.49.0.1.124.3084966124.2026
Sender: cap-pac@canada.ca
Sent: 2026-09-20 01:07:35 UTC

Identifier: urn:oid:2.49.0.1.124.1252371875.2026
Sender: cap-pac@canada.ca
Sent: 2026-09-20 14:50:54 UTC

Identifier: urn:oid:2.49.0.1.124.4122619831.2026
Sender: cap-pac@canada.ca
Sent: 2026-09-21 00:25:19 UTC

English

Event codes

Name	Value
profile:CAP-CP:Event:0.4	stormSurge
SAME	SSW

Parameters

Name	Value
layer:EC-MSC-SMC:1.0:Alert_Type	warning
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-2.0/20260921024609351/WC_19_79_CWVR/CFW/123156145655712029202609180517_WC_19_79_CWVR/actual/en_proper_complete_c-fr_proper_complete_c/NinJo
layer:EC-MSC-SMC:1.1:CAP_count	A:23846 M:122755 C:141956
layer:EC-MSC-SMC:1.0:Alert_Location_Status	active
layer:EC-MSC-SMC:1.0:Alert_Name	yellow warning - storm surge
layer:EC-MSC-SMC:1.0:Alert_Coverage	Yukon
layer:EC-MSC-SMC:1.1:Designation_Code	WC_19_79_CWVR
layer:SOREM:2.0:WirelessImmediate	No
layer:EC-MSC-SMC:1.1:Alert_Location_Status	active
layer:EC-MSC-SMC:1.1:Event_End_Time	2026-09-22T06:00:00.000Z
layer:EC-MSC-SMC:1.1:MSC_Risk_Tiered_Ranking	8
layer:EC-MSC-SMC:1.1:MSC_Impact	moderate
layer:EC-MSC-SMC:1.1:MSC_Confidence	high
layer:EC-MSC-SMC:1.1:Colour	yellow

French

Event codes

Name	Value
profile:CAP-CP:Event:0.4	stormSurge
SAME	SSW

Parameters

Name	Value
layer:EC-MSC-SMC:1.0:Alert_Type	warning
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-2.0/20260921024609351/WC_19_79_CWVR/CFW/123156145655712029202609180517_WC_19_79_CWVR/actual/en_proper_complete_c-fr_proper_complete_c/NinJo
layer:EC-MSC-SMC:1.1:CAP_count	A:23846 M:122755 C:141956
layer:EC-MSC-SMC:1.0:Alert_Location_Status	active
layer:EC-MSC-SMC:1.0:Alert_Name	avertissement jaune - submersion côtière
layer:EC-MSC-SMC:1.0:Alert_Coverage	Yukon
layer:EC-MSC-SMC:1.1:Designation_Code	WC_19_79_CWVR
layer:SOREM:2.0:WirelessImmediate	No
layer:EC-MSC-SMC:1.1:Alert_Location_Status	active
layer:EC-MSC-SMC:1.1:Event_End_Time	2026-09-22T06:00:00.000Z
layer:EC-MSC-SMC:1.1:MSC_Risk_Tiered_Ranking	8
layer:EC-MSC-SMC:1.1:MSC_Impact	modéré
layer:EC-MSC-SMC:1.1:MSC_Confidence	élevée
layer:EC-MSC-SMC:1.1:Colour	jaune

Locations

English

Location data

Coastline of Yukon incl. Herschel Island

Name	Value
layer:EC-MSC-SMC:1.0:CLC	090156
profile:CAP-CP:Location:0.3	6001045

Polygons: 69.5218,-138.8567 69.5218,-138.8567 69.5058,-138.961 69.4699,-138.9095 69.4763,-139.1945 69.5687,-139.5022 69.6137,-139.5098 69.6015,-139.417 69.6936,-139.1779 69.6634,-138.9064 69.6144,-138.7424 69.5436,-138.7137 69.5218,-138.8567

French

Location data

littoral du Yukon incl. l'île Herschel

Name	Value
layer:EC-MSC-SMC:1.0:CLC	090156
profile:CAP-CP:Location:0.3	6001045

Polygons: 69.5218,-138.8567 69.5218,-138.8567 69.5058,-138.961 69.4699,-138.9095 69.4763,-139.1945 69.5687,-139.5022 69.6137,-139.5098 69.6015,-139.417 69.6936,-139.1779 69.6634,-138.9064 69.6144,-138.7424 69.5436,-138.7137 69.5218,-138.8567