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

Heavy Rainfall Continues from the Southwest to the Plains; Severe Thunderstorms in the Southern Plains

Pacific tropical moisture wrapping into a storm will continue a multi-day heavy rainfall event this week that will impact the Southwest into the Plains. Scattered severe thunderstorms capable of mainly severe wind gusts appear possible across portions of the southern Plains this afternoon into tonight. There is also a risk of isolated severe winds gusts and tornadoes in Kansas into Nebraska. Read More >

Current conditions at

Pittsburgh - Allegheny County Airport (KAGC)

Lat: 40.36°NLon: 79.92°WElev: 1237ft.

Fog/Mist

60°F

16°C

Humidity 96%
Wind Speed S 6 mph
Barometer 30.12 in (1020.0 mb)
Dewpoint 59°F (15°C)
Visibility 4.00 mi
Last update 30 Sep 9:53 am EDT
Extended Forecast for

Castle Shannon PA

  • Today

    Today: Partly sunny, with a high near 76. Southwest wind 3 to 7 mph.

    High: 76 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 62. South wind around 5 mph.

    Low: 62 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 81. South wind 7 to 11 mph.

    High: 81 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 66. South wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 66 °F

    Increasing
    Clouds

  • Friday

    Friday: Showers. High near 74. Southwest wind 10 to 13 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 74 °F

    Showers

  • Friday Night

    Friday Night: A slight chance of showers before 2am. Mostly cloudy, with a low around 50. Chance of precipitation is 20%.

    Low: 50 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 50.

    Low: 50 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 69.

    High: 69 °F

    Partly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 76. Southwest wind 3 to 7 mph.
Tonight
Mostly cloudy, with a low around 62. South wind around 5 mph.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 81. South wind 7 to 11 mph.
Thursday Night
Increasing clouds, with a low around 66. South wind 8 to 10 mph, with gusts as high as 20 mph.
Friday
Showers. High near 74. Southwest wind 10 to 13 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
A slight chance of showers before 2am. Mostly cloudy, with a low around 50. Chance of precipitation is 20%.
Saturday
Mostly sunny, with a high near 67.
Saturday Night
Mostly cloudy, with a low around 50.
Sunday
Partly sunny, with a high near 69.
Sunday Night
Partly cloudy, with a low around 48.
Monday
Mostly sunny, with a high near 61.
Monday Night
Mostly clear, with a low around 39.
Tuesday
Sunny, with a high near 59.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Castle Shannon PA
 40.37°N 80.02°W (Elev. 1109 ft)
Last Update:
10:12 am EDT Sep 30, 2026
Forecast Valid:
10am EDT Sep 30, 2026-6pm EDT Oct 6, 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