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Sinlaku Continues to Impact the Marianas; Severe Weather from the Central US to the Northeast; Late-Season Snow in the Northwest

Sinlaku continues to bring destructive winds, widespread heavy rain/flooding, and storm surge to the Marianas. Showers and severe thunderstorms are expected from the Northeast to the Mid-Mississippi Valley and to the Central/Southern Plains through Thursday. A front will produce late-season snowfall over the Cascades and Northern Rockies and coastal rain over the Northwest Coast through Thursday. Read More >

Hazardous Weather Conditions

Current conditions at

Hagerstown, Washington County Regional Airport (KHGR)

Lat: 39.71°NLon: 77.73°WElev: 702ft.

Partly Cloudy

62°F

17°C

Humidity 93%
Wind Speed Calm
Barometer 29.96 in (1014.9 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 15 Apr 4:53 am EDT
Extended Forecast for

4 Miles N Williamsport MD

  • Overnight

    Overnight: Isolated showers. Partly cloudy, with a low around 62. Calm wind. Chance of precipitation is 20%.

    Low: 62 °F

    Isolated
    Showers

  • Wednesday

    Wednesday: Sunny, with a high near 90. Southwest wind 5 to 13 mph, with gusts as high as 20 mph.

    High: 90 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 64. Southwest wind around 6 mph.

    Low: 64 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 89. Southwest wind 5 to 13 mph, with gusts as high as 20 mph.

    High: 89 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of showers. Mostly cloudy, with a low around 64. West wind 7 to 9 mph. Chance of precipitation is 30%.

    Low: 64 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers. Partly sunny, with a high near 80. Chance of precipitation is 30%.

    High: 80 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of showers after 8pm. Mostly cloudy, with a low around 53. Chance of precipitation is 50%.

    Low: 53 °F

    Chance
    Showers

Detailed Forecast

Overnight
Isolated showers. Partly cloudy, with a low around 62. Calm wind. Chance of precipitation is 20%.
Wednesday
Sunny, with a high near 90. Southwest wind 5 to 13 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 64. Southwest wind around 6 mph.
Thursday
Mostly sunny, with a high near 89. Southwest wind 5 to 13 mph, with gusts as high as 20 mph.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 64. West wind 7 to 9 mph. Chance of precipitation is 30%.
Friday
A chance of showers. Partly sunny, with a high near 80. Chance of precipitation is 30%.
Friday Night
Partly cloudy, with a low around 60.
Saturday
Mostly sunny, with a high near 85.
Saturday Night
A chance of showers after 8pm. Mostly cloudy, with a low around 53. Chance of precipitation is 50%.
Sunday
A chance of showers. Mostly cloudy, with a high near 66. Chance of precipitation is 50%.
Sunday Night
A chance of showers. Partly cloudy, with a low around 38. Chance of precipitation is 30%.
Monday
Sunny, with a high near 55.
Monday Night
Mostly clear, with a low around 34.
Tuesday
Sunny, with a high near 68.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles N Williamsport MD
 39.66°N 77.82°W (Elev. 472 ft)
Last Update:
4:53 am EDT Apr 15, 2026
Forecast Valid:
5am EDT Apr 15, 2026-6pm EDT Apr 21, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation