Station Name: 9099090 - Grand Marais, MN
Station Type: Fixed
Data Source: National Data Buoy Center

Elevation Above Sea Level: 617 feet

Nearest Address:
391 MN-61
Grand Marais, MN 55604
Cook County

GPS Coordinates: 47.749, -90.341

Nearby Water Temperatures

yellow watch - severe thunderstorm - in effect

Effective: Mon July 6, 2026, 6:11 PM
Expires: Tue July 7, 2026, 1:02 AM

Conditions are favourable for the development of severe thunderstorms that may be capable of producing strong wind gusts, large hail and heavy rain. There is also a risk of a tornado. What: Wind gusts up to 110 km/h Loonie to ping pong ball sized hail Heavy rainfall up to 50 mm When: Continuing this evening. Additional information: Severe thunderstorms ahead of and along a cold front may continue this evening. There is also the risk of a tornado. ### Local utility outages are possible. There is a risk of injury. Strong wind gusts can damage trees, buildings and overturn vehicles. Severe thunderstorm watches are issued when conditions are favourable for the development of thunderstorms capable of producing damaging hail, wind or rain. 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. For more information: https://www.ontario.ca/page/be-prepared-emergency.

When thunder roars, go indoors! Lightning kills and injures Canadians every year. Secure loose objects. Emergency Management Ontario recommends that you take cover immediately if threatening weather approaches.

Marine Weather Statement issued July 7 at 3:02AM CDT by NWS Duluth MN

Effective: Tue July 7, 2026, 3:02 AM
Expires: Tue July 7, 2026, 5:00 AM

The areas affected include... Chequamegon Bay-Bayfield to Oak Point WI... Duluth MN to Port Wing WI... Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM... Oak Point to Saxon Harbor WI... Outer Apostle Islands Beyond 5 NM from Mainland... Port Wing to Sand Island WI... Sand Island to Bayfield WI... Silver Bay Harbor to Two Harbors MN... Taconite Harbor to Silver Bay Harbor MN... Two Harbors to Duluth MN... At 301 AM CDT, observation stations in the Twin Ports reported a gust front, producing winds to around 30 to 34 knots. This gust front was located along a line extending from 7 nm east of Silver Bay Marina and Ore Dock to 8 nm south of Superior Harbor, moving east at 30 knots.

Mariners can expect gusty winds to 30 knots and locally higher waves Boaters should seek safe harbor immediately until these storms pass.