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Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Hazardous Weather Conditions

Current conditions at

Grand Marais, The Bay of Grand Marais (KGNA)

Lat: 47.75°NLon: 90.34°WElev: 610ft.

58°F

14°C

Humidity 81%
Wind Speed E 10 mph
Barometer 30.13 in (1020.0 mb)
Dewpoint 52°F (11°C)
Visibility NA
Last update 18 Aug 3:56 am CDT
Extended Forecast for

2 Miles E Grand Marais MN

  • Overnight

    Overnight: A 20 percent chance of showers. Cloudy, with a steady temperature around 59. East wind around 10 mph, with gusts as high as 20 mph.

    Low: 59 °F

    Slight Chance
    Showers

  • Monday

    Monday: A chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 5pm, then a chance of showers and thunderstorms after 5pm. Cloudy, with a high near 68. East wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 68 °F

    Chance
    T-storms then
    Showers
    Likely

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 9pm. Patchy fog before 4am, then patchy fog after 5am. Otherwise, mostly cloudy, with a low around 61. Northeast wind around 5 mph becoming north after midnight. Chance of precipitation is 30%.

    Low: 61 °F

    Chance
    Showers then
    Patchy Fog

  • Tuesday

    Tuesday: Patchy fog before 7am. Otherwise, mostly sunny, with a high near 75. North wind around 5 mph.

    High: 75 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 60. Calm wind.

    Low: 60 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 75. Calm wind.

    High: 75 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 62. Calm wind.

    Low: 62 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 76. Calm wind becoming south around 5 mph in the afternoon.

    High: 76 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 65. Southwest wind around 5 mph.

    Low: 65 °F

    Chance
    Showers

Detailed Forecast

Overnight
A 20 percent chance of showers. Cloudy, with a steady temperature around 59. East wind around 10 mph, with gusts as high as 20 mph.
Monday
A chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 5pm, then a chance of showers and thunderstorms after 5pm. Cloudy, with a high near 68. East wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday Night
A chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 9pm. Patchy fog before 4am, then patchy fog after 5am. Otherwise, mostly cloudy, with a low around 61. Northeast wind around 5 mph becoming north after midnight. Chance of precipitation is 30%.
Tuesday
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 75. North wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 60. Calm wind.
Wednesday
Sunny, with a high near 75. Calm wind.
Wednesday Night
Partly cloudy, with a low around 62. Calm wind.
Thursday
Mostly sunny, with a high near 76. Calm wind becoming south around 5 mph in the afternoon.
Thursday Night
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 65. Southwest wind around 5 mph.
Friday
A slight chance of showers before 1pm. Mostly sunny, with a high near 77. West wind 5 to 10 mph, with gusts as high as 15 mph.
Friday Night
Mostly clear, with a low around 60. West wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 68. West wind around 10 mph, with gusts as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 55. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday
Mostly sunny, with a high near 68. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles E Grand Marais MN
 47.76°N 90.3°W
Last Update:
4:10 am CDT Aug 18, 2025
Forecast Valid:
4am CDT Aug 18, 2025-6pm CDT Aug 24, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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