Hawaii and Guam Concerns; Record Warmth Spreads Eastward; Heavy Snow for Sierra-Nevada; Severe Weather for the Plains

A very active spring pattern with tropical concerns across the Pacific. Heavy rainfall will continue to impact Hawaii this weekend. Meanwhile we continue to monitor a developing typhoon that may affect Guam into early next week. For the Lower 48, heavy snow for mountains of California this weekend, increase threat for severe thunderstorms next week for the Plains and record warmth spreads east. Read More >

Hazardous Weather Conditions

Current conditions at

Hagerstown, Washington County Regional Airport (KHGR)

Lat: 39.71°NLon: 77.73°WElev: 702ft.

Fair

76°F

24°C

Humidity 33%
Wind Speed S 17 mph
Barometer 30.10 in (1020.0 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 10 Apr 4:53 pm EDT
Extended Forecast for

3 Miles N Mercersburg PA

  • Tonight

    Tonight: A slight chance of showers between 10pm and midnight.  Mostly clear during the early evening, then becoming mostly cloudy, with a low around 48. Southwest wind around 6 mph becoming calm  in the evening.  Chance of precipitation is 20%.

    Low: 48 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 65. North wind around 6 mph.

    High: 65 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 41. Calm wind.

    Low: 41 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 69. Calm wind becoming south 5 to 9 mph in the morning. Winds could gust as high as 20 mph.

    High: 69 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 56. South wind around 6 mph.

    Low: 56 °F

    Mostly Cloudy

  • Monday

    Monday: A chance of showers, mainly after 2pm.  Mostly cloudy, with a high near 79. Chance of precipitation is 30%.

    High: 79 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers before 8pm.  Partly cloudy, with a low around 59. Chance of precipitation is 30%.

    Low: 59 °F

    Chance
    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 84.

    High: 84 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

Detailed Forecast

Tonight
A slight chance of showers between 10pm and midnight. Mostly clear during the early evening, then becoming mostly cloudy, with a low around 48. Southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 20%.
Saturday
Sunny, with a high near 65. North wind around 6 mph.
Saturday Night
Mostly clear, with a low around 41. Calm wind.
Sunday
Mostly sunny, with a high near 69. Calm wind becoming south 5 to 9 mph in the morning. Winds could gust as high as 20 mph.
Sunday Night
Mostly cloudy, with a low around 56. South wind around 6 mph.
Monday
A chance of showers, mainly after 2pm. Mostly cloudy, with a high near 79. Chance of precipitation is 30%.
Monday Night
A chance of showers before 8pm. Partly cloudy, with a low around 59. Chance of precipitation is 30%.
Tuesday
Mostly sunny, with a high near 84.
Tuesday Night
Partly cloudy, with a low around 62.
Wednesday
Partly sunny, with a high near 90.
Wednesday Night
Mostly cloudy, with a low around 64.
Thursday
Partly sunny, with a high near 85.
Thursday Night
Mostly cloudy, with a low around 60.
Friday
A chance of showers. Mostly sunny, with a high near 81. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles N Mercersburg PA
 39.87°N 77.9°W (Elev. 564 ft)
2:21 pm EDT Apr 10, 2026
5pm EDT Apr 10, 2026-6pm EDT Apr 17, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database