Severe Thunderstorms for the Center of the Nation; Fire Weather Concerns; Flooding Issues for the Great Lakes Region

A round of severe thunderstorms are forecast across areas of the Southern Plains, Mississippi Valley and Great Lakes this afternoon and tonight; The threat for flash flooding will also accompany these storms. The rainfall for the Great Lakes region could prolong the ongoing flooding. Where the rain is needed, the Southern High Plains, critical fire weather concerns through today. Read More >

Current conditions at

Harrisburg, Capital City Airport (KCXY)

Lat: 40.22°NLon: 76.86°WElev: 335ft.

Fair

59°F

15°C

Humidity 83%
Wind Speed Calm
Barometer 29.98 in (1015.0 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 18 Apr 4:56 am EDT
Extended Forecast for

Lower Allen PA

  • Today

    Today: Sunny through mid morning, then becoming mostly cloudy, with a high near 77. Southeast wind 5 to 13 mph, with gusts as high as 22 mph.

    High: 77 °F

    Mostly Cloudy

  • Tonight

    Tonight: Showers, mainly after 2am.  Low around 47. Southeast wind 6 to 14 mph, with gusts as high as 24 mph.  Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 47 °F

    Chance
    Showers then
    Showers

  • Sunday

    Sunday: Showers, mainly before 2pm.  High near 55. Northwest wind around 14 mph, with gusts as high as 26 mph.  Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 55 °F

    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 38. West wind 3 to 8 mph.

    Low: 38 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 50. Northwest wind 8 to 11 mph, with gusts as high as 22 mph.

    High: 50 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 30.

    Low: 30 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 69.

    High: 69 °F

    Partly Sunny

Detailed Forecast

Today
Sunny through mid morning, then becoming mostly cloudy, with a high near 77. Southeast wind 5 to 13 mph, with gusts as high as 22 mph.
Tonight
Showers, mainly after 2am. Low around 47. Southeast wind 6 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
Showers, mainly before 2pm. High near 55. Northwest wind around 14 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Partly cloudy, with a low around 38. West wind 3 to 8 mph.
Monday
Mostly sunny, with a high near 50. Northwest wind 8 to 11 mph, with gusts as high as 22 mph.
Monday Night
Mostly clear, with a low around 30.
Tuesday
Sunny, with a high near 57.
Tuesday Night
Partly cloudy, with a low around 45.
Wednesday
Partly sunny, with a high near 69.
Wednesday Night
Mostly clear, with a low around 44.
Thursday
Sunny, with a high near 72.
Thursday Night
Mostly clear, with a low around 49.
Friday
Mostly sunny, with a high near 77.
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ABOUT THIS FORECAST

 
Point Forecast:
Lower Allen PA
 40.23°N 76.91°W (Elev. 400 ft)
3:24 am EDT Apr 18, 2026
5am EDT Apr 18, 2026-6pm EDT Apr 24, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database