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

Strong to Severe Thunderstorms Continue Tonight in the East; Early Heat Wave in the West

Scattered strong to severe storms with damaging winds and potentially a tornado or two are expected tonight from the coastal Carolinas into the Mid-Atlantic states. An anomalously early heat wave will continue to intensify and expand across the West and Southwest as the week progresses. Numerous daily and potentially monthly record highs are expected to be broken. Read More >

Hazardous Weather Conditions

Current conditions at

Baltimore / Martin (KMTN)

Lat: 39.33°NLon: 76.42°WElev: 23ft.

Fair and Breezy

35°F

2°C

Humidity 45%
Wind Speed NW 24 G 30 mph
Barometer 29.78 in
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Wind Chill23°F (-5°C)
Last update 17 Mar 4:35 am EDT
Extended Forecast for

Glen Arm MD

  • Today

    Today: Mostly sunny, with a high near 40. West wind around 16 mph, with gusts as high as 30 mph.

    High: 40 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 24. West wind 5 to 10 mph becoming light northwest after midnight. Winds could gust as high as 18 mph.

    Low: 24 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 39. Calm wind becoming south around 6 mph in the afternoon.

    High: 39 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 29. Light south wind.

    Low: 29 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 50. South wind 3 to 7 mph.

    High: 50 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 56.

    High: 56 °F

    Partly Sunny

  • Friday Night

    Friday Night: A chance of rain. Mostly cloudy, with a low around 42. Chance of precipitation is 30%.

    Low: 42 °F

    Chance Rain

  • Saturday

    Saturday: Partly sunny, with a high near 57.

    High: 57 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 40. West wind around 16 mph, with gusts as high as 30 mph.
Tonight
Mostly clear, with a low around 24. West wind 5 to 10 mph becoming light northwest after midnight. Winds could gust as high as 18 mph.
Wednesday
Mostly sunny, with a high near 39. Calm wind becoming south around 6 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 29. Light south wind.
Thursday
Partly sunny, with a high near 50. South wind 3 to 7 mph.
Thursday Night
Partly cloudy, with a low around 35.
Friday
Partly sunny, with a high near 56.
Friday Night
A chance of rain. Mostly cloudy, with a low around 42. Chance of precipitation is 30%.
Saturday
Partly sunny, with a high near 57.
Saturday Night
Mostly cloudy, with a low around 41.
Sunday
Mostly cloudy, with a high near 63.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 37. Chance of precipitation is 30%.
Monday
A chance of rain. Mostly sunny, with a high near 51. Chance of precipitation is 30%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Glen Arm MD
 39.46°N 76.49°W (Elev. 328 ft)
Last Update:
2:42 am EDT Mar 17, 2026
Forecast Valid:
4am EDT Mar 17, 2026-6pm EDT Mar 23, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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