Heat Wave Persists Over the Central U.S.; Significant Flooding Expected in the Northern Mid-Atlantic Tuesday

Dangerous and extreme heat will remain across portions of the Central U.S. this week, persisting across the Mid to Lower Mississippi Valleys, Gulf Coast, Southern Plains and portions of Texas. A heat wave over the Southwest will intensify late this week. Severe thunderstorms and flash flooding will spread from the Great Lakes/Ohio Valley to the Mid-Atlantic and Northeast the next few days. Read More >

Current conditions at

Grand Marais, The Bay of Grand Marais (KGNA)

Lat: 47.75°NLon: 90.34°WElev: 610ft.

48°F

9°C

Humidity 100%
Wind Speed W 3 mph
Barometer 29.87 in (1011.7 mb)
Dewpoint 48°F (9°C)
Visibility NA
Last update 27 Jul 11:56 pm CDT
Extended Forecast for

Grand Marais MN

  • Overnight

    Overnight: Partly cloudy, with a low around 44. Northwest wind around 5 mph becoming calm.

    Low: 44 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers after noon.  Mostly sunny, with a high near 62. Calm wind becoming south around 5 mph.

    High: 62 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 44. Calm wind.

    Low: 44 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 63. Calm wind becoming south around 5 mph.

    High: 63 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers after 1am.  Mostly cloudy, with a low around 45. Calm wind.

    Low: 45 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Thursday

    Thursday: A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm.  Mostly cloudy, with a high near 64. Calm wind becoming south around 5 mph.  Chance of precipitation is 20%.

    High: 64 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms.  Cloudy, with a low around 48. Calm wind.

    Low: 48 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: A slight chance of showers, with thunderstorms also possible after 1pm.  Mostly cloudy, with a high near 66. Northwest wind around 5 mph becoming calm.

    High: 66 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 47. Calm wind becoming northwest around 5 mph.

    Low: 47 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 44. Northwest wind around 5 mph becoming calm.
Tuesday
A 20 percent chance of showers after noon. Mostly sunny, with a high near 62. Calm wind becoming south around 5 mph.
Tuesday Night
Partly cloudy, with a low around 44. Calm wind.
Wednesday
Mostly sunny, with a high near 63. Calm wind becoming south around 5 mph.
Wednesday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 45. Calm wind.
Thursday
A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 64. Calm wind becoming south around 5 mph. Chance of precipitation is 20%.
Thursday Night
A chance of showers and thunderstorms. Cloudy, with a low around 48. Calm wind.
Friday
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 66. Northwest wind around 5 mph becoming calm.
Friday Night
Mostly cloudy, with a low around 47. Calm wind becoming northwest around 5 mph.
Saturday
Partly sunny, with a high near 63. Calm wind becoming east around 5 mph.
Saturday Night
Partly cloudy, with a low around 44. Calm wind.
Sunday
Mostly sunny, with a high near 58. Calm wind becoming east around 5 mph in the afternoon.
Sunday Night
Mostly cloudy, with a low around 43. East wind around 5 mph becoming calm.
Monday
Partly sunny, with a high near 61. Calm wind becoming southeast around 5 mph in the morning.
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ABOUT THIS FORECAST

 
Point Forecast:
Grand Marais MN
 47.74°N 90.33°W
11:06 pm CDT Jul 27, 2026
12am CDT Jul 28, 2026-6pm CDT Aug 3, 2026
 
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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