Station Name: GRAND PORTAGE RIVER AT GRAND PORTAGE MN
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 623 feet

Nearest Address:
1 Upper Rd
Grand Portage, MN 55605
Cook County

GPS Coordinates: 47.9634982, -89.6834233

Nearby Water Temperatures

yellow advisory - frost - in effect

Service Notice – April 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 initiative to introduce free-form polygons to represent the true threat area of a weather hazard is tentatively set for June 2026 deployment. Data changes will appear in CAP following this deployment, 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 – avril 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) 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 en juin 2026. Des changements de données apparaîtront dans le PAC à la suite de ce déploiement, 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/

Effective: Thu May 21, 2026, 3:01 AM
Expires: Thu May 21, 2026, 7:01 PM

Frost is expected. Temperatures will be near or below the freezing mark this morning. Temperatures are expected to be near or below the freezing mark again tonight into Friday morning for some regions. ### Damage to plants, trees, and crops 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.

Take preventative measures to protect cold-sensitive plants, trees, and crops.

yellow advisory - frost - in effect

Service Notice – April 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 initiative to introduce free-form polygons to represent the true threat area of a weather hazard is tentatively set for June 2026 deployment. Data changes will appear in CAP following this deployment, 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 – avril 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) 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 en juin 2026. Des changements de données apparaîtront dans le PAC à la suite de ce déploiement, 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/

Effective: Thu May 21, 2026, 3:01 AM
Expires: Thu May 21, 2026, 7:01 PM

### Damage to plants, trees, and crops 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.

Take preventative measures to protect cold-sensitive plants, trees, and crops.

Frost Advisory issued May 20 at 9:35PM CDT until May 21 at 8:00AM CDT by NWS Duluth MN

Effective: Wed May 20, 2026, 9:35 PM
Expires: Thu May 21, 2026, 8:00 AM

* WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...In Minnesota, Carlton, South and Central St. Louis, Cook and Lake Counties. In Wisconsin, Price, Ashland, Bayfield, Douglas, Iron, and Sawyer Counties. This includes the Tribal Lands of the northwestern area of the Lac du Flambeau Band, the Fond du Lac Band, the Bad River Reservation, the Bois Forte Band, Lake Vermilion area, the Red Cliff Band, the Lac Courte Oreilles Reservation and the Grand Portage Reservation. Other locations including Madeline Island and the Apostle Islands National Lakeshore. This also includes the Boundary Waters eastern and central area. * WHEN...From 1 AM to 8 AM CDT Thursday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Take steps now to protect tender plants from the cold.

Freeze Warning issued May 21 at 2:14AM CDT until May 21 at 8:00AM CDT by NWS Duluth MN

Effective: Thu May 21, 2026, 2:14 AM
Expires: Thu May 21, 2026, 8:00 AM

* WHAT...Sub-freezing temperatures as low as 27. * WHERE...In Minnesota, Cook and Lake Counties. In Wisconsin, Ashland and Iron Counties. This includes the Tribal Lands of the northwestern area of the Lac du Flambeau Band, the Grand Portage Reservation and the Bad River Reservation. Other locations including Madeline Island. This also includes the Boundary Waters eastern and central area. * WHEN...Until 8 AM CDT this morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Take steps now to protect tender plants from the cold.