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

Isaias Expected To Be A Strong Hurricane Approaching The Northern Gulf Coast Friday

Isaias is expected to strengthen and be a strong hurricane when it approaches the northern Gulf Coast on Friday. Damaging hurricane-force winds and life-threatening storm surge impacts are expected Friday into Saturday. Isaias will bring heavy rainfall to the northern Gulf Coast and much of the Southeast U.S. Friday into the weekend. Read More >

Current conditions at

Pittsburgh - Allegheny County Airport (KAGC)

Lat: 40.36°NLon: 79.92°WElev: 1237ft.

Fair

60°F

16°C

Humidity 65%
Wind Speed SW 10 G 18 mph
Barometer 29.84 in (1010.3 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 8 Oct 12:53 am EDT
Extended Forecast for

Castle Shannon PA

  • Overnight

    Overnight: Mostly clear, with a low around 54. West wind 9 to 11 mph, with gusts as high as 23 mph.

    Low: 54 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 70. West wind 8 to 15 mph.

    High: 70 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 47. West wind around 6 mph becoming calm.

    Low: 47 °F

    Mostly Clear

  • Friday

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

    High: 70 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 50. Light and variable wind.

    Low: 50 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of showers after 2am. Mostly cloudy, with a low around 58. Chance of precipitation is 50%.

    Low: 58 °F

    Mostly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: Showers, mainly after 8am. High near 68. Chance of precipitation is 90%.

    High: 68 °F

    Showers

  • Sunday Night

    Sunday Night: Showers, mainly before 2am. Low around 59. Chance of precipitation is 80%.

    Low: 59 °F

    Showers

Detailed Forecast

Overnight
Mostly clear, with a low around 54. West wind 9 to 11 mph, with gusts as high as 23 mph.
Thursday
Sunny, with a high near 70. West wind 8 to 15 mph.
Thursday Night
Mostly clear, with a low around 47. West wind around 6 mph becoming calm.
Friday
Sunny, with a high near 70. Calm wind becoming west around 6 mph in the afternoon.
Friday Night
Mostly clear, with a low around 50. Light and variable wind.
Saturday
Mostly sunny, with a high near 76.
Saturday Night
A chance of showers after 2am. Mostly cloudy, with a low around 58. Chance of precipitation is 50%.
Sunday
Showers, mainly after 8am. High near 68. Chance of precipitation is 90%.
Sunday Night
Showers, mainly before 2am. Low around 59. Chance of precipitation is 80%.
Columbus Day
A chance of showers before 8am. Mostly cloudy, with a high near 71. Chance of precipitation is 30%.
Monday Night
Mostly cloudy, with a low around 58.
Tuesday
A chance of showers. Partly sunny, with a high near 69. Chance of precipitation is 50%.
Tuesday Night
Mostly cloudy, with a low around 49.
Wednesday
Mostly sunny, with a high near 60.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Castle Shannon PA
 40.35°N 80.03°W (Elev. 1198 ft)
Last Update:
12:57 am EDT Oct 8, 2026
Forecast Valid:
1am EDT Oct 8, 2026-6pm EDT Oct 14, 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