Hazardous Coastal Conditions for the Mid-Atlantic; Storm System Approaching Southern Alaska

A Nor'easter will create hazardous marine and coastal conditions along the Mid-Atlantic coast through mid-week, with significant coastal flooding and beach erosion possible. Meanwhile, another strong storm system is forecast to bring high winds and heavy precipitation to portions of southern Alaska. Elsewhere, relatively benign weather is expected through the first half of the work week. Read More >

Hazardous Weather Conditions

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

77°F

25°C

Humidity 85%
Wind Speed N 12 G 22 mph
Barometer 29.97 in (1014.7 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 20 Oct 2:53 am EDT
Extended Forecast for

5 Miles ENE Valhalla FL

  • Overnight

    Overnight: Mostly clear, with a low around 78. Northeast wind around 15 mph.

    Low: 78 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 86. Northeast wind around 15 mph.

    High: 86 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 76. Breezy, with a northeast wind 15 to 20 mph.

    Low: 76 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 84. North wind 10 to 15 mph.

    High: 84 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 75. Northeast wind around 10 mph.

    Low: 75 °F

    Mostly Clear

  • Thursday

    Thursday: A slight chance of showers.  Sunny, with a high near 83. Chance of precipitation is 10%.

    High: 83 °F

    Slight Chance
    Showers

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms.  Partly cloudy, with a low around 74. Chance of precipitation is 20%.

    Low: 74 °F

    Slight Chance
    T-storms

  • Friday

    Friday: A chance of showers and thunderstorms.  Mostly sunny, with a high near 83. Chance of precipitation is 30%.

    High: 83 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms.  Partly cloudy, with a low around 75. Windy.  Chance of precipitation is 50%.

    Low: 75 °F

    Chance
    T-storms and
    Windy

Detailed Forecast

Overnight
Mostly clear, with a low around 78. Northeast wind around 15 mph.
Tuesday
Sunny, with a high near 86. Northeast wind around 15 mph.
Tuesday Night
Mostly clear, with a low around 76. Breezy, with a northeast wind 15 to 20 mph.
Wednesday
Sunny, with a high near 84. North wind 10 to 15 mph.
Wednesday Night
Mostly clear, with a low around 75. Northeast wind around 10 mph.
Thursday
A slight chance of showers. Sunny, with a high near 83. Chance of precipitation is 10%.
Thursday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 74. Chance of precipitation is 20%.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 83. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 75. Windy. Chance of precipitation is 50%.
Saturday
Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 82. Windy. Chance of precipitation is 70%.
Saturday Night
Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 76. Very windy. Chance of precipitation is 70%.
Sunday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 82. Very windy. Chance of precipitation is 60%.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 76. Very windy. Chance of precipitation is 50%.
Monday
A chance of showers. Mostly sunny, with a high near 82. Very windy. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles ENE Valhalla FL
 24.77°N 80.91°W (Elev. 3 ft)
2:25 am EDT Oct 20, 2026
3am EDT Oct 20, 2026-6pm EDT Oct 26, 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