Strong to Severe Thunderstorms in the East; Heat in the Central and Western U.S.

Strong to potentially severe thunderstorms with damaging wind gusts are forecast Thursday from parts of New England into the Mid Atlantic and Carolinas. Significant heat will expand across the West and Central Plains through Friday, potentially breaking daily high temperature records. Dangerous heat will then build into the Eastern U.S. this weekend through much of next week. Read More >

Hazardous Weather Conditions

Current conditions at

Grand Marais/Cook County Airport (KCKC)

Lat: 47.84°NLon: 90.39°WElev: 1784ft.

Fair

54°F

12°C

Humidity 100%
Wind Speed N 7 mph
Barometer 29.85 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Wind Chill52°F (11°C)
Last update 19 Jun 3:55 am CDT
Extended Forecast for

Grand Portage MN

  • Juneteenth

    Juneteenth: A 50 percent chance of showers, mainly after noon.  Partly sunny, with a high near 60. North wind around 5 mph becoming southeast in the afternoon.

    High: 60 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Tonight

    Tonight: A 30 percent chance of showers, mainly before 8pm.  Patchy fog after 11pm.  Otherwise, mostly cloudy, with a low around 46. Southeast wind around 5 mph becoming calm.

    Low: 46 °F

    Chance
    Showers and
    Patchy Fog
    then Patchy
    Fog

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 4pm. Some of the storms could be severe.  Patchy fog before 8am.  Otherwise, partly sunny, with a high near 63. Calm wind becoming east around 5 mph in the morning.  Chance of precipitation is 40%.

    High: 63 °F

    Chance
    Showers and
    Patchy Fog
    then Severe
    Thunderstorms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 1am, then showers between 1am and 4am, then showers and possibly a thunderstorm after 4am. Some of the storms could be severe and produce heavy rainfall.  Low around 47. Northeast wind around 5 mph, with gusts as high as 15 mph.  Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.

    Low: 47 °F

    Severe
    Thunderstorms

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 1pm, then a slight chance of showers and thunderstorms after 1pm. Some of the storms could be severe.  Partly sunny, with a high near 72. Northeast wind 5 to 10 mph, with gusts as high as 15 mph.  Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 72 °F

    Severe
    Thunderstorms
    then Showers
    Likely

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 53. Northeast wind around 5 mph.

    Low: 53 °F

    Chance
    Showers then
    Chance
    T-storms

  • Sunday

    Sunday: A chance of showers and thunderstorms.  Partly sunny, with a high near 74. Northeast wind 5 to 10 mph becoming southeast in the afternoon. Winds could gust as high as 20 mph.

    High: 74 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 56. East wind 5 to 10 mph becoming west after midnight. Winds could gust as high as 20 mph.

    Low: 56 °F

    Chance
    T-storms

  • Monday

    Monday: A slight chance of showers and thunderstorms, then a chance of showers after 1pm.  Partly sunny, with a high near 72. West wind around 10 mph, with gusts as high as 20 mph.

    High: 72 °F

    Slight Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Juneteenth
A 50 percent chance of showers, mainly after noon. Partly sunny, with a high near 60. North wind around 5 mph becoming southeast in the afternoon.
Tonight
A 30 percent chance of showers, mainly before 8pm. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 46. Southeast wind around 5 mph becoming calm.
Friday
A chance of showers, with thunderstorms also possible after 4pm. Some of the storms could be severe. Patchy fog before 8am. Otherwise, partly sunny, with a high near 63. Calm wind becoming east around 5 mph in the morning. Chance of precipitation is 40%.
Friday Night
A chance of showers and thunderstorms before 1am, then showers between 1am and 4am, then showers and possibly a thunderstorm after 4am. Some of the storms could be severe and produce heavy rainfall. Low around 47. Northeast wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
Saturday
Showers likely and possibly a thunderstorm before 1pm, then a slight chance of showers and thunderstorms after 1pm. Some of the storms could be severe. Partly sunny, with a high near 72. Northeast wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 53. Northeast wind around 5 mph.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 74. Northeast wind 5 to 10 mph becoming southeast in the afternoon. Winds could gust as high as 20 mph.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 56. East wind 5 to 10 mph becoming west after midnight. Winds could gust as high as 20 mph.
Monday
A slight chance of showers and thunderstorms, then a chance of showers after 1pm. Partly sunny, with a high near 72. West wind around 10 mph, with gusts as high as 20 mph.
Monday Night
A slight chance of showers before 1am. Partly cloudy, with a low around 51. North wind around 5 mph, with gusts as high as 15 mph.
Tuesday
Mostly sunny, with a high near 64. North wind around 5 mph becoming east in the afternoon.
Tuesday Night
A slight chance of showers. Mostly cloudy, with a low around 47. East wind around 5 mph becoming calm in the evening.
Wednesday
A chance of showers. Partly sunny, with a high near 61. Northeast wind around 5 mph becoming southeast in the afternoon.
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ABOUT THIS FORECAST

 
Point Forecast:
Grand Portage MN
 47.96°N 89.69°W
2:40 am CDT Jun 19, 2025
4am CDT Jun 19, 2025-6pm CDT Jun 25, 2025
 
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