Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

Lake Elmo Airport (K21D)

Lat: 45°NLon: 92.85°WElev: 925ft.

Fair

77°F

25°C

Humidity 30%
Wind Speed W 6 mph
Barometer 30.00 in
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 19 Aug 3:55 pm CDT
Extended Forecast for

4 Miles WSW Marine On Saint Croix MN

  • Tonight

    Tonight: Mostly clear, with a low around 59. Northwest wind around 5 mph becoming calm.

    Low: 59 °F

    Mostly Clear

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms, mainly after 5pm.  Mostly sunny, with a high near 81. South southwest wind 5 to 15 mph.

    High: 81 °F

    Mostly Sunny
    then Chance
    Showers

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and midnight.  Partly cloudy, with a low around 61. Southwest wind 5 to 10 mph.  Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 61 °F

    Showers
    Likely then
    Partly Cloudy

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 80. North northwest wind 5 to 10 mph.

    High: 80 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Mostly clear, with a low around 59. North northwest wind around 5 mph becoming calm  in the evening.

    Low: 59 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 79. North northwest wind 5 to 10 mph.

    High: 79 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 53. North wind 5 to 10 mph becoming light  in the evening.

    Low: 53 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 78. Calm wind becoming northeast around 5 mph.

    High: 78 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 57. Calm wind becoming east southeast around 5 mph.

    Low: 57 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 59. Northwest wind around 5 mph becoming calm.
Thursday
A 30 percent chance of showers and thunderstorms, mainly after 5pm. Mostly sunny, with a high near 81. South southwest wind 5 to 15 mph.
Thursday Night
Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and midnight. Partly cloudy, with a low around 61. Southwest wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 80. North northwest wind 5 to 10 mph.
Friday Night
Mostly clear, with a low around 59. North northwest wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 79. North northwest wind 5 to 10 mph.
Saturday Night
Mostly clear, with a low around 53. North wind 5 to 10 mph becoming light in the evening.
Sunday
Mostly sunny, with a high near 78. Calm wind becoming northeast around 5 mph.
Sunday Night
Partly cloudy, with a low around 57. Calm wind becoming east southeast around 5 mph.
Monday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 81. South wind 5 to 10 mph.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 62. South southwest wind around 5 mph.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 84. West wind 5 to 10 mph.
Tuesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 62. North northwest wind 5 to 10 mph.
Wednesday
Mostly sunny, with a high near 83. North northwest wind 5 to 10 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Marine On Saint Croix MN
 45.16°N 92.85°W (Elev. 948 ft)
1:26 pm CDT Aug 19, 2026
4pm CDT Aug 19, 2026-6pm CDT Aug 26, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database