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

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 >

Hazardous Weather Conditions

Current conditions at

Harrisburg, Capital City Airport (KCXY)

Lat: 40.22°NLon: 76.86°WElev: 335ft.

Mostly Cloudy

52°F

11°C

Humidity 53%
Wind Speed W 14 G 21 mph
Barometer 29.96 in (1014.7 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Wind Chill47°F (8°C)
Last update 19 Apr 1:56 pm EDT
Extended Forecast for

Lower Allen 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: Mostly sunny, with a high near 55. Northwest wind around 15 mph, with gusts as high as 26 mph.

    High: 55 °F

    Mostly Sunny

  • Tonight

    Tonight: A slight chance of showers after 2am. Increasing clouds, with a low around 39. West wind 3 to 8 mph. Chance of precipitation is 20%.

    Low: 39 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 49. Northwest wind 9 to 13 mph, with gusts as high as 23 mph.

    High: 49 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 30. Northwest wind around 6 mph becoming calm in the evening.

    Low: 30 °F

    Mostly Clear

  • Tuesday

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

    High: 57 °F

    Sunny

  • Tuesday Night

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

    Low: 44 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers before 2pm. Partly sunny, with a high near 68. Chance of precipitation is 30%.

    High: 68 °F

    Chance
    Showers

  • 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
Mostly sunny, with a high near 55. Northwest wind around 15 mph, with gusts as high as 26 mph.
Tonight
A slight chance of showers after 2am. Increasing clouds, with a low around 39. West wind 3 to 8 mph. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 49. Northwest wind 9 to 13 mph, with gusts as high as 23 mph.
Monday Night
Mostly clear, with a low around 30. Northwest wind around 6 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 57. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Tuesday Night
A chance of showers, mainly after 2am. Partly cloudy, with a low around 44. Chance of precipitation is 30%.
Wednesday
A chance of showers before 2pm. 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 50.
Friday
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 73. Chance of precipitation is 50%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lower Allen PA
 40.23°N 76.91°W (Elev. 400 ft)
Last Update:
2:06 pm EDT Apr 19, 2026
Forecast Valid:
2pm EDT Apr 19, 2026-6pm EDT Apr 25, 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