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

Excessive Rainfall and Potential Tropical Cyclone in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce locally considerable flash flooding over parts of the northwestern Gulf Coast, lower Mississippi River Valley, and Deep South through Thursday. Potential Tropical Cyclone One is forecast to become a tropical storm (Arthur) as it moves along or just off the northwestern Gulf coast through Wednesday. An outbreak of severe weather is forecast in the Midwest Wednesday. Read More >

Current conditions at

Hagerstown, Washington County Regional Airport (KHGR)

Lat: 39.71°NLon: 77.73°WElev: 702ft.

Fair

66°F

19°C

Humidity 56%
Wind Speed E 6 mph
Barometer 29.80 in (1009.8 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 16 Jun 11:53 pm EDT
Extended Forecast for

Williamsport MD

  • Overnight

    Overnight: Mostly cloudy, with a low around 59. Light southeast wind.

    Low: 59 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 86. Light and variable wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 18 mph.

    High: 86 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 65. Calm wind becoming south 5 to 8 mph after midnight. Winds could gust as high as 18 mph.

    Low: 65 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm, mainly before 2pm, then a slight chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 91. West wind 13 to 18 mph, with gusts as high as 32 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 91 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A slight chance of showers before 8pm, then a chance of showers after 2am. Mostly cloudy, with a low around 65. West wind 5 to 11 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.

    Low: 65 °F

    Mostly Cloudy
    then Chance
    Showers

  • Juneteenth

    Juneteenth: A chance of showers before 2pm. Partly sunny, with a high near 82. Chance of precipitation is 30%.

    High: 82 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 59. Light southeast wind.
Wednesday
Mostly sunny, with a high near 86. Light and variable wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 18 mph.
Wednesday Night
Increasing clouds, with a low around 65. Calm wind becoming south 5 to 8 mph after midnight. Winds could gust as high as 18 mph.
Thursday
Showers likely and possibly a thunderstorm, mainly before 2pm, then a slight chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 91. West wind 13 to 18 mph, with gusts as high as 32 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A slight chance of showers before 8pm, then a chance of showers after 2am. Mostly cloudy, with a low around 65. West wind 5 to 11 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.
Juneteenth
A chance of showers before 2pm. Partly sunny, with a high near 82. Chance of precipitation is 30%.
Friday Night
Mostly clear, with a low around 60.
Saturday
Sunny, with a high near 82.
Saturday Night
Mostly clear, with a low around 59.
Sunday
Sunny, with a high near 84.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 61. Chance of precipitation is 40%.
Monday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 81. Chance of precipitation is 60%.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 62. Chance of precipitation is 60%.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 83. Chance of precipitation is 20%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Williamsport MD
 39.59°N 77.83°W (Elev. 348 ft)
Last Update:
10:53 pm EDT Jun 16, 2026
Forecast Valid:
12am EDT Jun 17, 2026-6pm EDT Jun 23, 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