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

Flooding Risks from Tropical Moisture Across the Southeast and Southwest

Tropical moisture from Isaias and Rachel will impact portions of the Southeast and Southwest this weekend. Flash flooding, strong winds and even a threat for severe thunderstorms and tornadoes are possible. Meanwhile, strong winds and dry fuels are raising fire weather concerns across the central Great Basin and western High Plains. Across the northern Rockies, first winter storm of the season. Read More >

Current conditions at

Hagerstown, Washington County Regional Airport (KHGR)

Lat: 39.71°NLon: 77.73°WElev: 702ft.

Fair

69°F

21°C

Humidity 42%
Wind Speed E 7 mph
Barometer 30.37 in (1029.3 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 10 Oct 2:53 pm EDT
Extended Forecast for

Chambersburg PA

  • Tonight

    Tonight: Rain likely, mainly after 4am. Cloudy, with a low around 57. East wind 3 to 6 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 57 °F

    Slight Chance
    Rain then
    Rain Likely

  • Sunday

    Sunday: Rain, with thunderstorms also possible after 2pm. High near 65. East wind around 9 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    High: 65 °F

    Rain

  • Sunday Night

    Sunday Night: Rain likely and possibly a thunderstorm before 11pm, then a chance of rain and thunderstorms between 11pm and 2am, then a chance of rain after 2am. Cloudy, with a low around 60. Northeast wind around 6 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 60 °F

    Rain Likely

  • Columbus Day

    Columbus Day: A slight chance of rain before 11am. Partly sunny, with a high near 73. Northwest wind 6 to 9 mph. Chance of precipitation is 20%.

    High: 73 °F

    Slight Chance
    Rain then
    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 56. Calm wind.

    Low: 56 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

Detailed Forecast

Tonight
Rain likely, mainly after 4am. Cloudy, with a low around 57. East wind 3 to 6 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
Rain, with thunderstorms also possible after 2pm. High near 65. East wind around 9 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Sunday Night
Rain likely and possibly a thunderstorm before 11pm, then a chance of rain and thunderstorms between 11pm and 2am, then a chance of rain after 2am. Cloudy, with a low around 60. Northeast wind around 6 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Columbus Day
A slight chance of rain before 11am. Partly sunny, with a high near 73. Northwest wind 6 to 9 mph. Chance of precipitation is 20%.
Monday Night
Partly cloudy, with a low around 56. Calm wind.
Tuesday
Sunny, with a high near 79.
Tuesday Night
Mostly clear, with a low around 63.
Wednesday
Mostly sunny, with a high near 77.
Wednesday Night
Partly cloudy, with a low around 55.
Thursday
Mostly sunny, with a high near 69.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 53. Chance of precipitation is 40%.
Friday
A chance of showers. Mostly cloudy, with a high near 68. Chance of precipitation is 40%.
Friday Night
A chance of showers. Mostly cloudy, with a low around 49. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 60.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Chambersburg PA
 39.93°N 77.66°W (Elev. 617 ft)
Last Update:
2:21 pm EDT Oct 10, 2026
Forecast Valid:
3pm EDT Oct 10, 2026-6pm EDT Oct 17, 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