Major Winter Storm Ongoing in the Upper Midwest; Severe Weather Tonight from the Mid-South to the Ohio Valley

A major winter storm will continue to bring blizzard conditions, heavy snowfall, icing, and strong winds through Monday across the Upper Midwest and Upper Great Lakes. A line of storms will be capable of producing widespread damaging winds, tornadoes, and some large hail from the Mid-South to the Ohio Valley and the Southeast through tonight, moving into the Mid-Atlantic Monday. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Partly Cloudy

79°F

26°C

Humidity 79%
Wind Speed SE 10 mph
Barometer 30.00 in (1015.6 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 15 Mar 11:53 pm EDT
Extended Forecast for

Key Colony Beach FL

  • Overnight

    Overnight: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 75. Southeast wind around 15 mph.  Chance of precipitation is 50%.

    Low: 75 °F

    Chance
    T-storms

  • Monday

    Monday: A chance of showers and thunderstorms.  Mostly sunny, with a high near 81. South wind 10 to 15 mph.  Chance of precipitation is 50%.

    High: 81 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm.  Mostly cloudy, with a low around 68. Southwest wind 5 to 10 mph.  Chance of precipitation is 70%.

    Low: 68 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A chance of showers and thunderstorms.  Cloudy, with a high near 74. North wind 10 to 15 mph.  Chance of precipitation is 50%.

    High: 74 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms.  Cloudy, with a low around 65. Northeast wind around 15 mph.  Chance of precipitation is 50%.

    Low: 65 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm.  Cloudy, with a high near 73. Breezy.  Chance of precipitation is 60%.

    High: 73 °F

    Showers
    Likely and
    Breezy

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms.  Cloudy, with a low around 67. Breezy.  Chance of precipitation is 50%.

    Low: 67 °F

    Chance
    Showers and
    Breezy

  • Thursday

    Thursday: A chance of showers and thunderstorms.  Partly sunny, with a high near 74. Breezy.  Chance of precipitation is 30%.

    High: 74 °F

    Chance
    Showers and
    Breezy

  • Thursday Night

    Thursday Night: A slight chance of showers.  Partly cloudy, with a low around 67. Breezy.  Chance of precipitation is 20%.

    Low: 67 °F

    Slight Chance
    Showers and
    Breezy

Detailed Forecast

Overnight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 75. Southeast wind around 15 mph. Chance of precipitation is 50%.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 81. South wind 10 to 15 mph. Chance of precipitation is 50%.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. Southwest wind 5 to 10 mph. Chance of precipitation is 70%.
Tuesday
A chance of showers and thunderstorms. Cloudy, with a high near 74. North wind 10 to 15 mph. Chance of precipitation is 50%.
Tuesday Night
A chance of showers and thunderstorms. Cloudy, with a low around 65. Northeast wind around 15 mph. Chance of precipitation is 50%.
Wednesday
Showers likely and possibly a thunderstorm. Cloudy, with a high near 73. Breezy. Chance of precipitation is 60%.
Wednesday Night
A chance of showers and thunderstorms. Cloudy, with a low around 67. Breezy. Chance of precipitation is 50%.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 74. Breezy. Chance of precipitation is 30%.
Thursday Night
A slight chance of showers. Partly cloudy, with a low around 67. Breezy. Chance of precipitation is 20%.
Friday
A slight chance of showers. Sunny, with a high near 75. Chance of precipitation is 10%.
Friday Night
Mostly clear, with a low around 67.
Saturday
Sunny, with a high near 75.
Saturday Night
Mostly clear, with a low around 69.
Sunday
Sunny, with a high near 76.
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ABOUT THIS FORECAST

 
Point Forecast:
Key Colony Beach FL
 24.74°N 81.02°W (Elev. 0 ft)
12:15 am EDT Mar 16, 2026
12am EDT Mar 16, 2026-6pm EDT Mar 22, 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