Showers and Thunderstorms for the Eastern Third of the Country; Fire Weather Concerns; Flooding Issues for the Great Lakes Region

Showers and thunderstorms will continue along and ahead of a cold front for the eastern third of the country. The rainfall for the Great Lakes region could prolong the ongoing flooding. Much cooler weather will filter in behind this cold front along and east of the Rockies. Where the rain is needed, the Southern High Plains, critical fire weather concerns through this weekend. Read More >

Current conditions at

Harrisburg, Capital City Airport (KCXY)

Lat: 40.22°NLon: 76.86°WElev: 335ft.

Overcast

48°F

9°C

Humidity 61%
Wind Speed NW 18 G 26 mph
Barometer 29.97 in (1014.8 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 19 Apr 11:56 am EDT
Extended Forecast for

Duncannon PA

Freeze Watch April 21, 12:00am until April 21, 09:00am
Click here for hazard details and duration
Freeze Watch
  • This Afternoon

    This Afternoon: Partly sunny, with a high near 54. Northwest wind around 14 mph, with gusts as high as 28 mph.

    High: 54 °F

    Partly Sunny

  • Tonight

    Tonight: A slight chance of rain showers after 2am, mixing with snow after 3am.  Partly cloudy, with a low around 38. West wind 3 to 7 mph.  Chance of precipitation is 20%.

    Low: 38 °F

    Mostly Clear
    then Slight
    Chance
    Rain/Snow

  • Monday

    Monday: Mostly sunny, with a high near 49. Northwest wind 9 to 11 mph, with gusts as high as 23 mph.

    High: 49 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Widespread frost after 5am.  Otherwise, mostly clear, with a low around 29. Northwest wind around 6 mph becoming calm  in the evening.

    Low: 29 °F

    Partly Cloudy
    then Frost

  • Tuesday

    Tuesday: Sunny, with a high near 57. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 57 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers, mainly after 2am.  Mostly cloudy, with a low around 44. Chance of precipitation is 30%.

    Low: 44 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers before 8am.  Partly sunny, with a high near 68. Chance of precipitation is 30%.

    High: 68 °F

    Chance
    Showers then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 54. Northwest wind around 14 mph, with gusts as high as 28 mph.
Tonight
A slight chance of rain showers after 2am, mixing with snow after 3am. Partly cloudy, with a low around 38. West wind 3 to 7 mph. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 49. Northwest wind 9 to 11 mph, with gusts as high as 23 mph.
Monday Night
Widespread frost after 5am. Otherwise, mostly clear, with a low around 29. Northwest wind around 6 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 57. Calm wind becoming south 5 to 7 mph in the afternoon.
Tuesday Night
A chance of showers, mainly after 2am. Mostly cloudy, with a low around 44. Chance of precipitation is 30%.
Wednesday
A chance of showers before 8am. Partly sunny, with a high near 68. Chance of precipitation is 30%.
Wednesday Night
Mostly clear, with a low around 46.
Thursday
Sunny, with a high near 74.
Thursday Night
Partly cloudy, with a low around 49.
Friday
Mostly sunny, with a high near 77.
Friday Night
A chance of showers. Partly cloudy, with a low around 53. Chance of precipitation is 30%.
Saturday
A chance of showers. Partly sunny, with a high near 72. Chance of precipitation is 50%.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Duncannon PA
 40.4°N 77.02°W (Elev. 413 ft)
8:06 am EDT Apr 19, 2026
12pm EDT Apr 19, 2026-6pm EDT Apr 25, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database