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

Excessive Rainfall and Tropical Storm in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce considerable, potentially life-threatening, flooding across the lower Mississippi River Valley and central Great Lakes region through tonight. Tropical Storm Arthur will move northeastward along the Texas coast today and then move inland over southwestern Louisiana by tonight. An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana. Read More >

Current conditions at

Chester County Airport (KMQS)

Lat: 39.98°NLon: 75.87°WElev: 659ft.

Partly Cloudy

79°F

26°C

Humidity 56%
Wind Speed SW 8 mph
Barometer 29.78 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 17 Jun 3:55 pm EDT
Extended Forecast for

Thorndale PA

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 8pm. Increasing clouds, with a low around 67. South wind 5 to 10 mph. Chance of precipitation is 20%.

    Low: 67 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 2pm. Cloudy through mid morning, then gradual clearing, with a high near 89. Breezy, with a south wind 15 to 20 mph, with gusts as high as 40 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 89 °F

    Breezy.
    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 64. West wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 64 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: Mostly cloudy, then gradually becoming sunny, with a high near 81. West wind around 10 mph, with gusts as high as 20 mph.

    High: 81 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Clear, with a low around 59. West wind 5 to 10 mph.

    Low: 59 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A chance of showers. Mostly cloudy, with a low around 61. Chance of precipitation is 50%.

    Low: 61 °F

    Chance
    Showers

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms before 8pm. Increasing clouds, with a low around 67. South wind 5 to 10 mph. Chance of precipitation is 20%.
Thursday
A chance of showers, with thunderstorms also possible after 2pm. Cloudy through mid morning, then gradual clearing, with a high near 89. Breezy, with a south wind 15 to 20 mph, with gusts as high as 40 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Partly cloudy, with a low around 64. West wind 5 to 15 mph, with gusts as high as 25 mph.
Juneteenth
Mostly cloudy, then gradually becoming sunny, with a high near 81. West wind around 10 mph, with gusts as high as 20 mph.
Friday Night
Clear, with a low around 59. West wind 5 to 10 mph.
Saturday
Sunny, with a high near 80.
Saturday Night
Mostly clear, with a low around 59.
Sunday
Mostly sunny, with a high near 82.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 61. Chance of precipitation is 50%.
Monday
Showers, with thunderstorms also possible after 2pm. High near 80. Chance of precipitation is 80%.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. Chance of precipitation is 40%.
Tuesday
Mostly sunny, with a high near 80.
Tuesday Night
Mostly clear, with a low around 59.
Wednesday
Sunny, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Thorndale PA
 40°N 75.76°W (Elev. 390 ft)
Last Update:
4:08 pm EDT Jun 17, 2026
Forecast Valid:
4pm EDT Jun 17, 2026-6pm EDT Jun 24, 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