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

Hazardous Weather Conditions

Current conditions at

Pittsburgh - Allegheny County Airport (KAGC)

Lat: 40.36°NLon: 79.92°WElev: 1237ft.

Light Snow and Windy

21°F

-6°C

Humidity 74%
Wind Speed W 26 G 38 mph
Barometer 29.79 in (1010.3 mb)
Dewpoint 14°F (-10°C)
Visibility 5.00 mi
Wind Chill4°F (-16°C)
Last update 29 Dec 6:53 pm EST
Extended Forecast for

Castle Shannon PA

Wind Advisory December 29, 06:56pm until December 30, 01:00am
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory December 29, 06:56pm until December 30, 01:00am

    NOW until 1:00am Tue

    Wind Advisory

  • Tonight

    Low: 21 °F

    Snow Likely
    and Patchy
    Blowing Snow

  • Tuesday

    Tuesday: A slight chance of snow between 10am and 1pm. Patchy blowing snow before 4pm. Mostly cloudy, with a high near 28. Breezy, with a west wind 17 to 22 mph, with gusts as high as 33 mph. Chance of precipitation is 20%.

    High: 28 °F

    Slight Chance
    Snow and
    Patchy
    Blowing Snow

  • Tuesday Night

    Tuesday Night: Snow likely after 1am. Mostly cloudy, with a low around 21. West wind around 15 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 21 °F

    Mostly Cloudy
    then Snow
    Likely

  • Wednesday

    Wednesday: Snow, mainly after 1pm. Patchy blowing snow between noon and 3pm. High near 32. Southwest wind 14 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    High: 32 °F

    Chance Snow
    then Snow and
    Patchy
    Blowing Snow

  • Wednesday Night

    Wednesday Night: Snow. Low around 16. West wind 11 to 15 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    Low: 16 °F

    Snow

  • New Year's Day

    New Year's Day: A slight chance of snow before 1pm. Partly sunny, with a high near 23. Chance of precipitation is 20%.

    High: 23 °F

    Slight Chance
    Snow

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 16.

    Low: 16 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 33.

    High: 33 °F

    Partly Sunny

Detailed Forecast

Tonight
Snow likely, mainly before 2am. Patchy blowing snow before 10pm, then patchy blowing snow after 1am. Cloudy, with a low around 21. Breezy, with a west wind 22 to 24 mph, with gusts as high as 40 mph. Chance of precipitation is 70%. Total nighttime snow accumulation of less than one inch possible.
Tuesday
A slight chance of snow between 10am and 1pm. Patchy blowing snow before 4pm. Mostly cloudy, with a high near 28. Breezy, with a west wind 17 to 22 mph, with gusts as high as 33 mph. Chance of precipitation is 20%.
Tuesday Night
Snow likely after 1am. Mostly cloudy, with a low around 21. West wind around 15 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Wednesday
Snow, mainly after 1pm. Patchy blowing snow between noon and 3pm. High near 32. Southwest wind 14 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Wednesday Night
Snow. Low around 16. West wind 11 to 15 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
New Year's Day
A slight chance of snow before 1pm. Partly sunny, with a high near 23. Chance of precipitation is 20%.
Thursday Night
Mostly cloudy, with a low around 16.
Friday
Partly sunny, with a high near 33.
Friday Night
Partly cloudy, with a low around 20.
Saturday
Mostly cloudy, with a high near 33.
Saturday Night
Mostly cloudy, with a low around 18.
Sunday
Partly sunny, with a high near 34.
Sunday Night
Mostly cloudy, with a low around 23.
Monday
Mostly cloudy, with a high near 39.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Castle Shannon PA
 40.37°N 80.02°W (Elev. 1109 ft)
Last Update:
6:36 pm EST Dec 29, 2025
Forecast Valid:
6pm EST Dec 29, 2025-6pm EST Jan 5, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation