Widespread Summer Heat; Enhanced Severe Weather

A large ridge of high pressure continues to deliver summer heat w/ humidity in several sections of the country. Excessive heat warnings and heat advisories are in effect across the Desert Southwest, south-central Plains, Mid to Lower Mississippi Valley and a small part of the Mid-Atlantic. Meanwhile, an enhanced risk of organized severe thunderstorms is possible from Iowa to Illinois and Indiana. Read More >

Hazardous Weather Conditions

Current conditions at

Pittsburgh - Allegheny County Airport (KAGC)

Lat: 40.36°NLon: 79.92°WElev: 1237ft.

Overcast

79°F

26°C

Humidity 74%
Wind Speed SW 7 mph
Barometer 30.13 in (1019.9 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 20 Aug 11:53 am EDT
Extended Forecast for

Castle Shannon PA

  • This
    Afternoon

    This Afternoon: Scattered showers and thunderstorms, mainly after 1pm.  Partly sunny, with a high near 87. South wind 3 to 5 mph.  Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Scattered
    T-storms

    High: 87 °F

  • Tonight

    Tonight: Scattered showers and thunderstorms, mainly after 10pm.  Mostly cloudy, with a low around 70. South wind 3 to 5 mph.  Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Scattered
    T-storms

    Low: 70 °F

  • Wednesday

    Wednesday: Showers and thunderstorms, mainly before 3pm.  High near 84. Southwest wind 6 to 8 mph.  Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    T-storms

    High: 84 °F

  • Wednesday
    Night

    Wednesday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 68. West wind around 6 mph.  Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Chance
    T-storms

    Low: 68 °F

  • Thursday

    Thursday: A chance of showers and thunderstorms, mainly after noon.  Partly sunny, with a high near 77. Northwest wind around 6 mph.  Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Chance
    Showers then
    Chance
    T-storms

    High: 77 °F

  • Thursday
    Night

    Thursday Night: A chance of showers and thunderstorms before 2am, then a slight chance of showers.  Mostly cloudy, with a low around 60. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Chance
    T-storms then
    Chance
    Showers

    Low: 60 °F

  • Friday

    Friday: Mostly sunny, with a high near 76.

    Mostly Sunny

    High: 76 °F

  • Friday
    Night

    Friday Night: Partly cloudy, with a low around 56.

    Partly Cloudy

    Low: 56 °F

  • Saturday

    Saturday: Sunny, with a high near 77.

    Sunny

    High: 77 °F

Detailed Forecast

This Afternoon
Scattered showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 87. South wind 3 to 5 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Scattered showers and thunderstorms, mainly after 10pm. Mostly cloudy, with a low around 70. South wind 3 to 5 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
Showers and thunderstorms, mainly before 3pm. High near 84. Southwest wind 6 to 8 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. West wind around 6 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
A chance of showers and thunderstorms, mainly after noon. Partly sunny, with a high near 77. Northwest wind around 6 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A chance of showers and thunderstorms before 2am, then a slight chance of showers. Mostly cloudy, with a low around 60. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
Mostly sunny, with a high near 76.
Friday Night
Partly cloudy, with a low around 56.
Saturday
Sunny, with a high near 77.
Saturday Night
Mostly clear, with a low around 58.
Sunday
Mostly sunny, with a high near 80.
Sunday Night
Partly cloudy, with a low around 61.
Monday
Mostly sunny, with a high near 81.
Click Map For Forecast
Point Forecast:
Castle Shannon PA
 40.35°N 80.03°W (Elev. 1198 ft)
10:28 am EDT Aug 20, 2019
12pm EDT Aug 20, 2019-6pm EDT Aug 26, 2019
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database