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 1 at 9:54AM CDT until May 2 at 7:00PM CDT by NWS Duluth MN

Effective: Fri May 1, 2026, 9:54 AM
Expires: Sat May 2, 2026, 7:00 PM

High water continues across portions of the far eastern Rainy River watershed due to the effects of runoff from heavy rains and snowmelt from earlier this week. Expect high, fast moving water on area rivers and elevated lake levels. Water levels are near or just surpassed those seen during flood events in Spring 2022 and June 2024. Further water level increases are possible through this weekend after which slow declines should begin. * WHAT...Flooding caused by runoff from rain and snowmelt continues. * WHERE...In Minnesota, Cook and Lake Counties. * WHEN...Until 700 PM CDT Saturday. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Some low-water crossings may become impassable. River or stream flows are elevated. * ADDITIONAL DETAILS... - At 948 AM CDT Friday, automated river gages and the public reported flooding in the advisory area. Minor flooding is occurring. - Expect high, fast moving water on area rivers and elevated lake levels. Water levels are near or just surpassed those seen during flood events in Spring 2022 and June 2024. Further water level increases are possible through this weekend after which slow declines should begin. - Some locations that will experience flooding include... Gunflint Lake, Forest Center, Little Saganaga Lake, Boundary Waters Canoe Area Wilderness, Snowbank Lake, Alpine Lake, Sea Gull Lake, Isabella, Saganaga Lake, Basswood Lake, Fall Lake, White Iron Lake, Birch Lake, Boundary Waters Canoe Area Wilderness North of the Gunflint Trail, Pine Lake, Alice Lake, Malberg Lake, Lake Polly and Thomas 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. 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.