National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Isolated Severe Thunderstorms and Critical Fire Weather Tuesday

Isolated severe thunderstorms with strong wind gusts and hail will be possible Tuesday from parts of central Plains northeastward into the Midwest. Additional storms capable of damaging winds will be possible across the eastern Florida peninsula. Elevated to critical fire weather including gusty winds and low relative humidity is forecast again Tuesday over much of the northern Great Plains. Read More >

Current conditions at

Baltimore / Martin (KMTN)

Lat: 39.33°NLon: 76.42°WElev: 23ft.

Fair

50°F

10°C

Humidity 75%
Wind Speed W 3 mph
Barometer 30.18 in
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 12 May 1:37 am EDT
Extended Forecast for

Glen Arm MD

  • Overnight

    Overnight: Mostly clear, with a low around 42. North wind around 6 mph.

    Low: 42 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 68. North wind around 6 mph becoming light and variable in the morning.

    High: 68 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 52. South wind 5 to 8 mph.

    Low: 52 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm, mainly after 5pm. Partly sunny, with a high near 72. South wind 11 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 72 °F

    Partly Sunny
    then Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Low around 51. South wind 5 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 90%.

    Low: 51 °F

    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 66.

    High: 66 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 49.

    Low: 49 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 70.

    High: 70 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 42. North wind around 6 mph.
Tuesday
Sunny, with a high near 68. North wind around 6 mph becoming light and variable in the morning.
Tuesday Night
Increasing clouds, with a low around 52. South wind 5 to 8 mph.
Wednesday
Showers likely and possibly a thunderstorm, mainly after 5pm. Partly sunny, with a high near 72. South wind 11 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers and possibly a thunderstorm. Low around 51. South wind 5 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 90%.
Thursday
Mostly sunny, with a high near 66.
Thursday Night
Partly cloudy, with a low around 49.
Friday
Mostly sunny, with a high near 70.
Friday Night
Partly cloudy, with a low around 51.
Saturday
Mostly sunny, with a high near 80.
Saturday Night
Partly cloudy, with a low around 60.
Sunday
Sunny, with a high near 84.
Sunday Night
Partly cloudy, with a low around 61.
Monday
Sunny, with a high near 85.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Glen Arm MD
 39.44°N 76.53°W (Elev. 312 ft)
Last Update:
10:55 pm EDT May 11, 2026
Forecast Valid:
1am EDT May 12, 2026-6pm EDT May 18, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation