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

Heavy Great Lakes Snow through Friday; Watching Potential for Major Winter Storm Late Week into this Weekend

Heavy lake effect snow will continue in the Great Lakes into Wednesday before another storm brings a widespread general snow followed by another round of heavy lake effect snow. A wide-ranging winter storm will produce great swaths of heavy snow, sleet, and treacherous freezing rain from the southern Rockies/Plains and Mid-South starting Friday and shifting toward the East Coast through Sunday. Read More >

Current conditions at

Hagerstown, Washington County Regional Airport (KHGR)

Lat: 39.71°NLon: 77.73°WElev: 702ft.

Fair

23°F

-5°C

Humidity 30%
Wind Speed W 13 mph
Barometer 30.39 in (1031.3 mb)
Dewpoint -4°F (-20°C)
Visibility 10.00 mi
Wind Chill11°F (-12°C)
Last update 20 Jan 4:53 pm EST
Extended Forecast for

4 Miles N Williamsport MD

  • Tonight

    Tonight: Clear, with a low around 10. West wind around 6 mph becoming calm in the evening.

    Low: 10 °F

    Clear

  • Wednesday

    Wednesday: Increasing clouds, with a high near 39. Light south wind increasing to 9 to 14 mph in the morning. Winds could gust as high as 24 mph.

    High: 39 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 30. South wind 6 to 8 mph, with gusts as high as 18 mph.

    Low: 30 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 46. West wind 6 to 14 mph, with gusts as high as 24 mph.

    High: 46 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 22. Northwest wind 3 to 5 mph.

    Low: 22 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 33.

    High: 33 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 7.

    Low: 7 °F

    Mostly Cloudy

  • Saturday

    Saturday: A chance of snow after 1pm. Mostly cloudy, with a high near 17. Chance of precipitation is 30%.

    High: 17 °F

    Partly Sunny
    then Chance
    Snow

  • Saturday Night

    Saturday Night: Snow likely, mainly after 1am. Cloudy, with a low around 11. Chance of precipitation is 70%.

    Low: 11 °F

    Snow Likely

Detailed Forecast

Tonight
Clear, with a low around 10. West wind around 6 mph becoming calm in the evening.
Wednesday
Increasing clouds, with a high near 39. Light south wind increasing to 9 to 14 mph in the morning. Winds could gust as high as 24 mph.
Wednesday Night
Mostly cloudy, with a low around 30. South wind 6 to 8 mph, with gusts as high as 18 mph.
Thursday
Mostly sunny, with a high near 46. West wind 6 to 14 mph, with gusts as high as 24 mph.
Thursday Night
Partly cloudy, with a low around 22. Northwest wind 3 to 5 mph.
Friday
Partly sunny, with a high near 33.
Friday Night
Mostly cloudy, with a low around 7.
Saturday
A chance of snow after 1pm. Mostly cloudy, with a high near 17. Chance of precipitation is 30%.
Saturday Night
Snow likely, mainly after 1am. Cloudy, with a low around 11. Chance of precipitation is 70%.
Sunday
Snow likely, mainly before 1pm. Cloudy, with a high near 20. Chance of precipitation is 70%.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 7. Chance of precipitation is 30%.
Monday
Partly sunny, with a high near 24.
Monday Night
Partly cloudy, with a low around 6.
Tuesday
Mostly sunny, with a high near 26.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles N Williamsport MD
 39.66°N 77.82°W (Elev. 472 ft)
Last Update:
3:53 pm EST Jan 20, 2026
Forecast Valid:
5pm EST Jan 20, 2026-6pm EST Jan 27, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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