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

Hurricane and Storm Surge Watches Issued for the Northern Gulf Coast for Strengthening Tropical Storm Isaias

Tropical Storm Isaias is forecast to track toward the central Gulf Coast while strengthening into a hurricane on Thursday. There is an increasing risk of damaging hurricane-force winds and life-threatening storm surge impacts along portions of the northern Gulf Coast Friday into Saturday. Isaias will bring heavy rainfall to the central Gulf Coast and much of the Southeast Friday into the weekend. Read More >

Current conditions at

Harrisburg, Capital City Airport (KCXY)

Lat: 40.22°NLon: 76.86°WElev: 335ft.

Fair

64°F

18°C

Humidity 63%
Wind Speed SE 6 mph
Barometer 29.87 in (1011.5 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 7 Oct 7:56 pm EDT
Extended Forecast for

Duncannon PA

  • Tonight

    Tonight: Mostly clear, with a low around 54. South wind around 5 mph becoming calm in the evening.

    Low: 54 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 74. Light west wind increasing to 5 to 9 mph in the morning. Winds could gust as high as 22 mph.

    High: 74 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 49. West wind around 5 mph becoming calm in the evening.

    Low: 49 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 70. Calm wind becoming northwest around 6 mph in the afternoon.

    High: 70 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 50. Calm wind.

    Low: 50 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Showers after 2am. Low around 55. Chance of precipitation is 100%.

    Low: 55 °F

    Mostly Cloudy
    then Showers

  • Sunday

    Sunday: Showers. High near 65. Chance of precipitation is 100%.

    High: 65 °F

    Showers

  • Sunday Night

    Sunday Night: Showers likely before 2am. Cloudy, with a low around 60. Chance of precipitation is 60%.

    Low: 60 °F

    Showers
    Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 54. South wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 74. Light west wind increasing to 5 to 9 mph in the morning. Winds could gust as high as 22 mph.
Thursday Night
Mostly clear, with a low around 49. West wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 70. Calm wind becoming northwest around 6 mph in the afternoon.
Friday Night
Mostly clear, with a low around 50. Calm wind.
Saturday
Mostly sunny, with a high near 74.
Saturday Night
Showers after 2am. Low around 55. Chance of precipitation is 100%.
Sunday
Showers. High near 65. Chance of precipitation is 100%.
Sunday Night
Showers likely before 2am. Cloudy, with a low around 60. Chance of precipitation is 60%.
Columbus Day
Mostly cloudy, with a high near 72.
Monday Night
Mostly cloudy, with a low around 58.
Tuesday
A chance of showers. Partly sunny, with a high near 68. Chance of precipitation is 30%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 46. Chance of precipitation is 30%.
Wednesday
Mostly sunny, with a high near 60.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Duncannon PA
 40.4°N 77.02°W (Elev. 413 ft)
Last Update:
8:05 pm EDT Oct 7, 2026
Forecast Valid:
8pm EDT Oct 7, 2026-6pm EDT Oct 14, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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