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

Flood Advisory issued May 4 at 10:34AM CDT until May 6 at 3:45PM CDT by NWS Duluth MN

Effective: Mon May 4, 2026, 10:34 AM
Expires: Wed May 6, 2026, 3:45 PM

* WHAT...Flooding caused by rain and snowmelt continues. * WHERE...In Minnesota, Cook, Lake and St. Louis Counties. * WHEN...Until 345 PM CDT Wednesday. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Some low water crossings may become impassable. River or stream flows are very elevated. * ADDITIONAL DETAILS... - At 1028 AM CDT Monday, the public and automated river gauges reported flooding in the advisory area. Rapid river rises have already caused minor flooding in the advisory area. - This includes the following streams and drainages... Isabella River, Moose River, Jeanette Creek, Horse River, Kawishiwi River, and Hustler River. Additional rainfall amounts up to 0.2 inches are expected over the area in the next couple of days. - Expect high, fast moving water on area rivers and elevated lake levels. Water levels are near or above those seen during flood events in Spring 2022 and June 2024. - Far eastern and southern areas of the advisory near the end of the Gunflint Trail and Ely are likely reaching peak levels this weekend, with decreases expected through the coming week. For areas near and on Basswood Lake and Lac La Croix, expect rises to continue into and through much of the week of May 4. The advisory may need to be extended. - Those venturing into the Boundary Waters should prepare for high water and possible inundation of portages and campsites, as well as dangerous rapids and very cold water. - Some locations that will experience flooding include... Gunflint Lake, Snowbank Lake, Basswood Lake, Boundary Waters Canoe Area Wilderness, Fall Lake, White Iron Lake, Sea Gull Lake, Saganaga Lake, Ensign Lake, Disappointment Lake and Lac La Croix. - Flood safety information can be found at www.weather.gov/safety/flood.

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. Portage and hiking trails may be impassable and low-lying campsites may be inundated with excessive runoff in this section of the Boundary Waters as flooding is occurring or imminent. Report observed flooding to local emergency services or law enforcement and to the National Weather Service in Duluth when you can do so safely. Flooding can be reported to the National Weather Service at 1-800-685-8612.