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 11 at 2:54PM CDT until May 15 at 3:45PM CDT by NWS Duluth MN

Effective: Mon May 11, 2026, 2:54 PM
Expires: Fri May 15, 2026, 3:45 PM

* WHAT...Flooding caused by rain and snowmelt continues. * WHERE...In Minnesota, northwest Cook, northern Lake and northeast St. Louis Counties. * WHEN...Until 345 PM CDT Friday. * IMPACTS...Minor flooding in low-lying and poor drainage areas, rivers and around area lakes. Some low-water crossings may become impassable. * ADDITIONAL DETAILS... - At 254 PM CDT Monday, elevated river and lake levels continue. - This includes the following streams and drainages... Moose River, Jeanette Creek, Horse River, Basswood River, Kawishiwi River, and Hustler River. Additional rainfall amounts up to two tenths to three tenths of an inch are expected over the area through mid-week. 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. Areas near the end of the Gunflint Trail and near Ely will continue to see slow decreases in elevated water levels this week. For areas near and on Basswood Lake, flows are peaking as of Sunday afternoon, May 10, and at Lac La Croix peak flows are expected this week. 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, 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.

Red Flag Warning issued May 15 at 1:28AM CDT until May 15 at 9:00PM CDT by NWS Duluth MN

Effective: Fri May 15, 2026, 1:28 AM
Expires: Fri May 15, 2026, 4:00 PM

* AFFECTED AREA...In Minnesota, Koochiching, St. Louis, Cook, Lake, Itasca, Cass, Crow Wing, Aitkin, Carlton and Pine. * WINDS...West 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 15 percent. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended.

A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.