National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Erin Strengthens to a Hurricane; Heavy Rainfall Possible in Puerto Rico and the Virgin Islands, the Upper Midwest, South Texas

Hurricane Erin may bring isolated flash and urban flooding, landslides or mudslides, and possible tropical storm conditions to Puerto Rico and the U.S. Virgin Islands this weekend. Scattered thunderstorms and heavy rainfall may bring areas of flooding this weekend over the Upper Midwest. A tropical disturbance will bring locally heavy rain and mainly urban flash flooding to far southern Texas. Read More >

Hazardous Weather Conditions

Current conditions at

Grand Marais, The Bay of Grand Marais (KGNA)

Lat: 47.75°NLon: 90.34°WElev: 610ft.

64°F

18°C

Humidity 68%
Wind Speed NE 10 G 20 mph
Barometer 30.05 in (1017.1 mb)
Dewpoint 53°F (12°C)
Visibility NA
Last update 16 Aug 5:56 am CDT
Extended Forecast for

Grand Marais MN

  • Today

    Today: A 20 percent chance of showers before 2pm. Partly sunny, with a high near 71. North wind 5 to 10 mph becoming east in the afternoon.

    High: 71 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: Partly cloudy, with a low around 54. Northeast wind 5 to 10 mph, with gusts as high as 25 mph.

    Low: 54 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 63. Breezy, with an east wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 63 °F

    Mostly Sunny
    and Breezy

  • Sunday Night

    Sunday Night: Showers likely, with thunderstorms also possible after 4am. Mostly cloudy, with a low around 55. Breezy, with an east wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 55 °F

    Chance
    Showers and
    Breezy then
    Showers
    Likely

  • Monday

    Monday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Patchy fog between noon and 2pm. Otherwise, mostly cloudy, with a high near 68. East wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 68 °F

    Showers
    Likely and
    Patchy Fog

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 1am. Mostly cloudy, with a low around 57. Northeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 57 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Tuesday

    Tuesday: Mostly sunny, with a high near 70. Northeast wind around 5 mph becoming east in the afternoon. Winds could gust as high as 15 mph.

    High: 70 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 56. Calm wind.

    Low: 56 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 73. Calm wind becoming south around 5 mph.

    High: 73 °F

    Sunny

Detailed Forecast

Today
A 20 percent chance of showers before 2pm. Partly sunny, with a high near 71. North wind 5 to 10 mph becoming east in the afternoon.
Tonight
Partly cloudy, with a low around 54. Northeast wind 5 to 10 mph, with gusts as high as 25 mph.
Sunday
Mostly sunny, with a high near 63. Breezy, with an east wind 10 to 15 mph, with gusts as high as 30 mph.
Sunday Night
Showers likely, with thunderstorms also possible after 4am. Mostly cloudy, with a low around 55. Breezy, with an east wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Patchy fog between noon and 2pm. Otherwise, mostly cloudy, with a high near 68. East wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 1am. Mostly cloudy, with a low around 57. Northeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Tuesday
Mostly sunny, with a high near 70. Northeast wind around 5 mph becoming east in the afternoon. Winds could gust as high as 15 mph.
Tuesday Night
Mostly clear, with a low around 56. Calm wind.
Wednesday
Sunny, with a high near 73. Calm wind becoming south around 5 mph.
Wednesday Night
Mostly clear, with a low around 59. Calm wind.
Thursday
Sunny, with a high near 75. Calm wind becoming southwest around 5 mph in the afternoon.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 62. West wind around 5 mph.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 77. West wind around 5 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grand Marais MN
 47.76°N 90.33°W
Last Update:
5:56 am CDT Aug 16, 2025
Forecast Valid:
6am CDT Aug 16, 2025-6pm CDT Aug 22, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation