Risks of Severe Thunderstorms and Excessive Rainfall in the Central U.S.; Fire Weather Concerns in Alaska and Southwest

An expansive storm system will bring widespread storms with a threat for flash flooding and severe weather to much of the central to eastern U.S. into early this week. Critical fire weather conditions are expected across interior Alaska this weekend. Elevated fire conditions also expected in the Southwest U.S.. Conditions will remain uncomfortably hot across the southern Plains and the Southeast. Read More >

Current conditions at

Chester County Airport (KMQS)

Lat: 39.98°NLon: 75.87°WElev: 659ft.

Fair

67°F

19°C

Humidity 58%
Wind Speed W 3 mph
Barometer 29.88 in
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 20 Jun 10:35 pm EDT
Extended Forecast for

Atglen PA

  • Tonight

    Tonight: A chance of sprinkles before midnight.  Mostly clear, with a low around 58. West wind around 5 mph becoming calm.

    Low: 58 °F

    Chance
    Sprinkles

  • Sunday

    Sunday: Mostly sunny, with a high near 81. West wind 5 to 15 mph.

    High: 81 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 60. Northwest wind around 5 mph becoming calm  in the evening.

    Low: 60 °F

    Mostly Cloudy

  • Monday

    Monday: A chance of showers, then showers and possibly a thunderstorm after 2pm. Some of the storms could produce heavy rainfall.  High near 82. East wind 5 to 15 mph becoming south in the afternoon. Winds could gust as high as 25 mph.  Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 82 °F

    Chance
    Showers then
    Heavy Rain

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 2am, then a chance of showers. Some of the storms could produce heavy rainfall.  Low around 63. South wind around 5 mph.  Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 63 °F

    Heavy Rain

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 8am.  Partly sunny, with a high near 79. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 79 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

Detailed Forecast

Tonight
A chance of sprinkles before midnight. Mostly clear, with a low around 58. West wind around 5 mph becoming calm.
Sunday
Mostly sunny, with a high near 81. West wind 5 to 15 mph.
Sunday Night
Mostly cloudy, with a low around 60. Northwest wind around 5 mph becoming calm in the evening.
Monday
A chance of showers, then showers and possibly a thunderstorm after 2pm. Some of the storms could produce heavy rainfall. High near 82. East wind 5 to 15 mph becoming south in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Monday Night
Showers and possibly a thunderstorm before 2am, then a chance of showers. Some of the storms could produce heavy rainfall. Low around 63. South wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday
A chance of showers, with thunderstorms also possible after 8am. Partly sunny, with a high near 79. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Partly cloudy, with a low around 58.
Wednesday
Sunny, with a high near 81.
Wednesday Night
Mostly clear, with a low around 60.
Thursday
A chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 81. Chance of precipitation is 50%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 61. Chance of precipitation is 50%.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 81. Chance of precipitation is 40%.
Friday Night
A chance of thunderstorms. Partly cloudy, with a low around 61. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 82.
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ABOUT THIS FORECAST

 
Point Forecast:
Atglen PA
 39.96°N 75.97°W (Elev. 499 ft)
9:47 pm EDT Jun 20, 2026
10pm EDT Jun 20, 2026-6pm EDT Jun 27, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database