Station Name: WEST SUPERIOR - 30NM NE of Outer Island, WI
Station Type: Other
Data Source: National Data Buoy Center

Elevation Above Sea Level: 587 feet

Nearest Address:
Offshore
Lake Superior, MI

GPS Coordinates: 47.335, -89.793

Nearby Water Temperatures

Frost Advisory issued May 20 at 1:57PM EDT until May 21 at 9:00AM EDT by NWS Marquette MI

Effective: Wed May 20, 2026, 1:57 PM
Expires: Thu May 21, 2026, 9:00 AM

* WHAT...Temperatures as low as 28 will result in frost formation. * WHERE...Portions of central Upper and western Upper Michigan. * WHEN...From 11 PM EDT /10 PM CDT/ this evening to 9 AM EDT /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.

Frost Advisory issued May 21 at 2:21AM EDT until May 21 at 9:00AM EDT by NWS Marquette MI

Effective: Thu May 21, 2026, 2:21 AM
Expires: Thu May 21, 2026, 9:00 AM

* WHAT...Temperatures as low as 28 will result in frost formation. * WHERE...Menominee, Gogebic, Keweenaw, Northern Houghton, and Ontonagon Counties. * WHEN...Until 9 AM EDT /8 AM CDT/ this morning. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. * ADDITIONAL DETAILS...Some locations further interior of the Great Lakes such as Menominee County north of US-2 and the US-45 corridor between Watersmeet and Bruce Crossing may locally experience hard freeze conditions.

Take steps now to protect tender plants from the cold.

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, 10:35 PM
Expires: Thu May 21, 2026, 9:00 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, 3:14 AM
Expires: Thu May 21, 2026, 9:00 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.