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

53°F

12°C

Humidity 47%
Wind Speed E 6 mph
Barometer 30.43 in (1031.5 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Wind Chill51°F (11°C)
Last update 12 Apr 8:53 am EDT
Extended Forecast for

3 Miles SSW Mercersburg PA

  • Today

    Today: Mostly sunny, with a high near 71. Light southeast wind becoming south 6 to 11 mph in the morning. Winds could gust as high as 24 mph.

    High: 71 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 57. South wind around 7 mph, with gusts as high as 20 mph.

    Low: 57 °F

    Mostly Cloudy

  • Monday

    Monday: A chance of showers.  Mostly cloudy, with a high near 79. South wind 6 to 10 mph, with gusts as high as 22 mph.  Chance of precipitation is 40%.

    High: 79 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 59. West wind around 5 mph becoming calm  in the evening.

    Low: 59 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of showers.  Mostly sunny, with a high near 85. Calm wind becoming southwest 5 to 8 mph in the morning.  Chance of precipitation is 20%.

    High: 85 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of showers before 2am.  Partly cloudy, with a low around 64. Chance of precipitation is 20%.

    Low: 64 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 90.

    High: 90 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 65.

    Low: 65 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 88.

    High: 88 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 71. Light southeast wind becoming south 6 to 11 mph in the morning. Winds could gust as high as 24 mph.
Tonight
Mostly cloudy, with a low around 57. South wind around 7 mph, with gusts as high as 20 mph.
Monday
A chance of showers. Mostly cloudy, with a high near 79. South wind 6 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Monday Night
Partly cloudy, with a low around 59. West wind around 5 mph becoming calm in the evening.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 85. Calm wind becoming southwest 5 to 8 mph in the morning. Chance of precipitation is 20%.
Tuesday Night
A slight chance of showers before 2am. Partly cloudy, with a low around 64. Chance of precipitation is 20%.
Wednesday
Mostly sunny, with a high near 90.
Wednesday Night
Mostly cloudy, with a low around 65.
Thursday
Partly sunny, with a high near 88.
Thursday Night
A chance of showers after 8pm. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 84.
Friday Night
Partly cloudy, with a low around 60.
Saturday
A chance of showers. Mostly sunny, with a high near 86. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Mercersburg PA
 39.78°N 77.94°W (Elev. 551 ft)
8:21 am EDT Apr 12, 2026
9am EDT Apr 12, 2026-6pm EDT Apr 18, 2026
 
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Additional Resources

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Hourly Weather Forecast

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