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

Heavy Rainfall And Severe Weather Potential Continues From The Plains To The Mississippi Valley; Dry Out West

A low pressure system over the Mississippi Valley may yield heavy rainfall and flash flooding concerns through Friday. In addition, the threat for severe thunderstorms capable of damaging winds and large hail will continue. Fire threats remain high across parts of the West with hot and dry conditions expected. Read More >

Current conditions at

Harrisburg, Capital City Airport (KCXY)

Lat: 40.22°NLon: 76.86°WElev: 335ft.

Fair

80°F

27°C

Humidity 67%
Wind Speed SW 3 mph
Barometer 30.11 in (1019.5 mb)
Dewpoint 68°F (20°C)
Visibility 9.00 mi
Heat Index83°F (28°C)
Last update 16 Aug 9:56 am EDT
Extended Forecast for

Duncannon PA

  • Today

    Today: Partly sunny, with a high near 90. Calm wind becoming southwest around 5 mph in the afternoon.

    Partly Sunny

    High: 90 °F

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly after 3am. Mostly cloudy, with a low around 70. Light south wind. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Chance
    T-storms

    Low: 70 °F

  • Friday

    Friday: Showers and thunderstorms likely, mainly after 9am. Some of the storms could produce gusty winds and heavy rain. Mostly cloudy, with a high near 89. Southwest wind 3 to 8 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Heavy Rain

    High: 89 °F

  • Friday
    Night

    Friday Night: Showers and thunderstorms likely before 3am, then a slight chance of showers. Some of the storms could produce gusty winds and heavy rain. Mostly cloudy, with a low around 70. Southwest wind around 6 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Heavy Rain

    Low: 70 °F

  • Saturday

    Saturday: A slight chance of showers, then scattered showers and thunderstorms after 9am. Mostly cloudy, with a high near 83. Northwest wind 6 to 8 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Scattered
    Showers

    High: 83 °F

  • Saturday
    Night

    Saturday Night: Scattered showers and thunderstorms, mainly before 9pm. Mostly cloudy, with a low around 65. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Scattered
    Showers then
    Slight Chance
    T-storms

    Low: 65 °F

  • Sunday

    Sunday: Partly sunny, with a high near 81.

    Partly Sunny

    High: 81 °F

  • Sunday
    Night

    Sunday Night: Mostly cloudy, with a low around 62.

    Mostly Cloudy

    Low: 62 °F

  • Monday

    Monday: Partly sunny, with a high near 81.

    Partly Sunny

    High: 81 °F

Detailed Forecast

Today
Partly sunny, with a high near 90. Calm wind becoming southwest around 5 mph in the afternoon.
Tonight
A chance of showers and thunderstorms, mainly after 3am. Mostly cloudy, with a low around 70. Light south wind. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Showers and thunderstorms likely, mainly after 9am. Some of the storms could produce gusty winds and heavy rain. Mostly cloudy, with a high near 89. Southwest wind 3 to 8 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and thunderstorms likely before 3am, then a slight chance of showers. Some of the storms could produce gusty winds and heavy rain. Mostly cloudy, with a low around 70. Southwest wind around 6 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
A slight chance of showers, then scattered showers and thunderstorms after 9am. Mostly cloudy, with a high near 83. Northwest wind 6 to 8 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Scattered showers and thunderstorms, mainly before 9pm. Mostly cloudy, with a low around 65. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
Partly sunny, with a high near 81.
Sunday Night
Mostly cloudy, with a low around 62.
Monday
Partly sunny, with a high near 81.
Monday Night
Mostly cloudy, with a low around 64.
Tuesday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 82. Chance of precipitation is 50%.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 50%.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 82. Chance of precipitation is 50%.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
Duncannon PA
 40.4°N 77.02°W (Elev. 413 ft)
Last Update:
9:41 am EDT Aug 16, 2018
Forecast Valid:
10am EDT Aug 16, 2018-6pm EDT Aug 22, 2018
 
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Additional Resources

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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