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.

Fair

0°F

-18°C

Humidity 62%
Wind Speed N 5 mph
Barometer 30.55 in (1037.8 mb)
Dewpoint -10°F (-23°C)
Visibility 10.00 mi
Wind Chill-11°F (-24°C)
Last update 24 Jan 1:53 am EST
Extended Forecast for

Castle Shannon PA

Cold Weather Advisory January 24, 02:49am until January 24, 07:00am
Winter Storm Warning January 24, 07:00pm until January 26, 12:00pm
Click here for hazard details and duration
Cold Weather Advisory
Winter Storm Warning
  •  
    Cold Weather Advisory January 24, 02:49am until January 24, 07:00am

    NOW until 7:00am Sat

    Cold Weather Advisory

  • Overnight

    Low: 0 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 16. Wind chill values as low as -9. Northeast wind 3 to 7 mph.

    High: 16 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Snow, mainly after 2am. Low around 12. East wind 7 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    Low: 12 °F

    Chance Snow
    then Snow

  • Sunday

    Sunday: Snow. The snow could be heavy at times. High near 26. East wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New snow accumulation of 5 to 9 inches possible.

    High: 26 °F

    Heavy Snow

  • Sunday Night

    Sunday Night: Snow. Low around 14. East wind 7 to 10 mph becoming west after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

    Low: 14 °F

    Snow

  • Monday

    Monday: A chance of snow showers. Mostly cloudy, with a high near 19. Chance of precipitation is 50%.

    High: 19 °F

    Chance Snow
    Showers

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 0.

    Low: 0 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 17.

    High: 17 °F

    Partly Sunny

Detailed Forecast

Overnight
Partly cloudy, with a low around 0. Wind chill values as low as -11. North wind around 7 mph.
Saturday
Mostly cloudy, with a high near 16. Wind chill values as low as -9. Northeast wind 3 to 7 mph.
Saturday Night
Snow, mainly after 2am. Low around 12. East wind 7 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Sunday
Snow. The snow could be heavy at times. High near 26. East wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New snow accumulation of 5 to 9 inches possible.
Sunday Night
Snow. Low around 14. East wind 7 to 10 mph becoming west after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.
Monday
A chance of snow showers. Mostly cloudy, with a high near 19. Chance of precipitation is 50%.
Monday Night
Mostly cloudy, with a low around 0.
Tuesday
Partly sunny, with a high near 17.
Tuesday Night
Mostly cloudy, with a low around 7.
Wednesday
A chance of snow showers after 1pm. Mostly cloudy, with a high near 18. Chance of precipitation is 30%.
Wednesday Night
A chance of snow showers. Mostly cloudy, with a low around 4. Chance of precipitation is 50%.
Thursday
A chance of snow showers. Mostly cloudy, with a high near 16. Chance of precipitation is 40%.
Thursday Night
Mostly cloudy, with a low around 3.
Friday
Mostly cloudy, with a high near 17.
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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:
2:08 am EST Jan 24, 2026
Forecast Valid:
2am EST Jan 24, 2026-6pm EST Jan 30, 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