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 warning - rainfall - in effect

Service 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/

Effective: Mon April 27, 2026, 2:46 PM
Expires: Tue April 28, 2026, 6:46 AM

Rain, at times heavy, expected. The frozen or nearly saturated ground has a reduced ability to absorb this rainfall. What: Rainfall amounts of 25 to 40 mm. When: Ending Tuesday morning. Additional information: Areas near Lake Nipigon may transition to snow overnight or Tuesday morning. ### Localized flooding is possible. Some roads may become impassable. For information concerning flooding, please consult your local Conservation Authority or Ontario Ministry of Natural Resources office. Visit https://www.ontario.ca/page/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.

Don't drive through flooded roadways. Stay away from rivers, creeks and culverts.

yellow warning - rainfall - in effect

Service 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/

Effective: Mon April 27, 2026, 9:39 AM
Expires: Tue April 28, 2026, 1:39 AM

Rain, at times, heavy, is expected. The frozen or nearly saturated ground has a reduced ability to absorb this rainfall. What: Rainfall amounts of 25 to 40 mm. When: Beginning this afternoon or early evening and diminishing Tuesday morning. Additional information: Significant rainfall will affect much of northwestern Ontario as well as regions around Lake Superior. Confidence in heavy rainfall amounts is highest for regions along the shores of Lake Superior. The rainfall warning has been expanded as the most recent analysis suggests the rainfall amounts could be higher than originally anticipated. Areas near Lake Nipigon may transition to snow overnight or Tuesday morning. ### Localized flooding is possible. Some roads may become impassable. For information concerning flooding, please consult your local Conservation Authority or Ontario Ministry of Natural Resources office. Visit https://www.ontario.ca/page/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.

Don't drive through flooded roadways. Stay away from rivers, creeks and culverts.

Flood Watch issued April 27 at 11:44AM CDT until April 28 at 3:00AM CDT by NWS Duluth MN

Effective: Mon April 27, 2026, 11:44 AM
Expires: Tue April 28, 2026, 3:00 AM

* WHAT...Flooding caused by rain and snowmelt continues to be possible. * WHERE...In Minnesota, Cook and Lake Counties. This includes the Tribal Lands of the Grand Portage Reservation.This also includes the Boundary Waters eastern and central area. * WHEN...Through late tonight. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. Be mindful of cold, fast-moving water near rivers and streams. * ADDITIONAL DETAILS... - An additional three quarters to one and one half inch of rain is expected to fall this afternoon into tonight. Eastern Cook County also has several inches of lingering snowpack. While rainfall rates are not expected to be heavy, prolonged moderate rainfall on top of saturated soils will lead to runoff. Area rivers and streams are already running at elevated levels and could rise to minor flooding levels with runoff due to the additional rainfall. - Flood safety information can be found at www.weather.gov/safety/flood.

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

Flood Advisory issued April 27 at 6:00PM CDT until April 28 at 6:00PM CDT by NWS Duluth MN

Effective: Mon April 27, 2026, 6:00 PM
Expires: Tue April 28, 2026, 6:00 PM

* WHAT...Flooding caused by rain and snowmelt is expected. * WHERE...In Minnesota, Cook, Lake and St. Louis Counties. * WHEN...Until 600 PM CDT Tuesday. * IMPACTS...Minor flooding in low-lying and poor drainage areas. River or stream flows are elevated. Flooding is occurring on area rivers that are popular for waterfall viewing. * ADDITIONAL DETAILS... - At 557 PM CDT Monday, rain and snowmelt is occurring, and will cause minor flooding. Rapid river rises will cause minor flooding in the advisory area. Between 1 and 1.5 inches of rain have fallen. - Additional rainfall amounts of 0.5 to 1 inch are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include... Grand Marais, Gunflint Lake, Two Harbors, Silver Bay, Grand Portage, Clear Lake, Lutsen, Tofte, Beaver Bay, Wolf Lake, Dumbbell Lake, George Manitou State Park, Forest Center, Sugar Loaf Cove, Temperance River State Park, Taconite Harbor, Isabella, Little Marais, Finland and Little Saganaga Lake. - Flood safety information can be found at www.weather.gov/safety/flood.

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Campers and hikers should avoid flooded trail crossings. If camping at a site along or near the banks of rivers or streams, move away from those locations and seek higher ground. Trails in hilly terrain can quickly become unstable during or shortly after heavy rainfall.