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

Snow Squalls May Impact the Northeast on Thursday; Dangerously Cold Arctic Air Impact the North-Central US

Snow showers and snow squalls are likely to develop across the Northeast on Thursday. Lake effect snow will persist downwind of the Great Lakes. An arctic blast will bring frigid temperatures, gusty winds and dangerous wind chills to the Northern Plains before expanding to the South and East. A major winter storm will begin impacting the Southern Plains and Lower Mississippi Valley Friday. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Overcast

40°F

4°C

Humidity 36%
Wind Speed S 12 mph
Barometer 30.10 in (1021.1 mb)
Dewpoint 15°F (-9°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 21 Jan 11:56 pm EST
Extended Forecast for

Olney MD

  • Overnight

    Overnight: Mostly clear, with a low around 32. Southwest wind around 10 mph, with gusts as high as 21 mph.

    Low: 32 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 48. Southwest wind 7 to 13 mph, with gusts as high as 23 mph.

    High: 48 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 27. Northwest wind 3 to 6 mph.

    Low: 27 °F

    Partly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 39. Light west wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 20 mph.

    High: 39 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 10. North wind 11 to 14 mph, with gusts as high as 23 mph.

    Low: 10 °F

    Mostly Cloudy

  • Saturday

    Saturday: A chance of snow after 1pm. Cloudy, with a high near 18. Chance of precipitation is 30%.

    High: 18 °F

    Mostly Cloudy
    then Chance
    Snow

  • Saturday Night

    Saturday Night: Snow. Low around 13. Chance of precipitation is 90%.

    Low: 13 °F

    Snow

  • Sunday

    Sunday: Snow. High near 20. Chance of precipitation is 90%.

    High: 20 °F

    Snow

  • Sunday Night

    Sunday Night: Snow likely, mainly before 1am. Mostly cloudy, with a low around 14. Chance of precipitation is 60%.

    Low: 14 °F

    Snow Likely

Detailed Forecast

Overnight
Mostly clear, with a low around 32. Southwest wind around 10 mph, with gusts as high as 21 mph.
Thursday
Mostly sunny, with a high near 48. Southwest wind 7 to 13 mph, with gusts as high as 23 mph.
Thursday Night
Partly cloudy, with a low around 27. Northwest wind 3 to 6 mph.
Friday
Mostly cloudy, with a high near 39. Light west wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 20 mph.
Friday Night
Mostly cloudy, with a low around 10. North wind 11 to 14 mph, with gusts as high as 23 mph.
Saturday
A chance of snow after 1pm. Cloudy, with a high near 18. Chance of precipitation is 30%.
Saturday Night
Snow. Low around 13. Chance of precipitation is 90%.
Sunday
Snow. High near 20. Chance of precipitation is 90%.
Sunday Night
Snow likely, mainly before 1am. Mostly cloudy, with a low around 14. Chance of precipitation is 60%.
Monday
Mostly sunny, with a high near 23.
Monday Night
Mostly clear, with a low around 5.
Tuesday
Sunny, with a high near 22.
Tuesday Night
Partly cloudy, with a low around 6.
Wednesday
Partly sunny, with a high near 27.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Olney MD
 39.16°N 77.06°W (Elev. 486 ft)
Last Update:
9:53 pm EST Jan 21, 2026
Forecast Valid:
12am EST Jan 22, 2026-6pm EST Jan 28, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation