Dangerous heat and humidity from the central U.S. to East Coast this weekend

Hot and very humid conditions will push the heat index to well over 100 degrees across a large portion of the central and eastern U.S. Excessive Heat Warnings and Heat Advisories are in effect for much of the Plains, Miss. Valley, Midwest, Ohio Valley, Mid-Atlantic and southern states. Be very cautious if you must do outdoor activities in these areas during the afternoon and evening this weekend. Read More >

Current conditions at

Pottstown, Pottstown Limerick Airport (KPTW)

Lat: 40.24°NLon: 75.55°WElev: 288ft.

Fair

72°F

22°C

Humidity 82%
Wind Speed Calm
Barometer 30.03 in (1016.5 mb)
Dewpoint 66°F (19°C)
Visibility 8.00 mi
Last update 24 Jul 7:54 am EDT
Extended Forecast for

Downingtown PA

Excessive Heat Warning until July 25, 06:00pm
Click here for hazard details and duration
Excessive Heat Warning
  •  
    Excessive Heat Warning until July 25, 06:00pm

    NOW until
    6:00pm Mon

    Excessive Heat Warning

  • Today

    Today: Sunny, with a high near 94. Calm wind becoming southwest around 6 mph in the afternoon.

    Sunny

    High: 94 °F

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly after 3am.  Patchy fog after 4am.  Otherwise, partly cloudy, with a low around 74. Light south wind.  Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Partly Cloudy
    then Chance
    T-storms and
    Patchy Fog

    Low: 74 °F

  • Monday

    Monday: A chance of showers and thunderstorms, mainly after 2pm.  Patchy fog before 8am.  Otherwise, mostly cloudy, with a high near 96. Heat index values as high as 105. Southwest wind 3 to 8 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 and
    Patchy Fog

    High: 96 °F

  • Monday
    Night

    Monday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 75. West wind 3 to 5 mph.  Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Chance
    T-storms

    Low: 75 °F

  • Tuesday

    Tuesday: Mostly sunny, with a high near 93. Northwest wind 5 to 9 mph.

    Mostly Sunny

    High: 93 °F

  • Tuesday
    Night

    Tuesday Night: Partly cloudy, with a low around 73.

    Partly Cloudy

    Low: 73 °F

  • Wednesday

    Wednesday: Mostly sunny, with a high near 92.

    Mostly Sunny

    High: 92 °F

  • Wednesday
    Night

    Wednesday Night: Mostly cloudy, with a low around 72.

    Mostly Cloudy

    Low: 72 °F

Detailed Forecast

Today
Sunny, with a high near 94. Calm wind becoming southwest around 6 mph in the afternoon.
Tonight
A chance of showers and thunderstorms, mainly after 3am. Patchy fog after 4am. Otherwise, partly cloudy, with a low around 74. Light south wind. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
A chance of showers and thunderstorms, mainly after 2pm. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 96. Heat index values as high as 105. Southwest wind 3 to 8 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 75. West wind 3 to 5 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
Mostly sunny, with a high near 93. Northwest wind 5 to 9 mph.
Tuesday Night
Partly cloudy, with a low around 73.
Wednesday
Mostly sunny, with a high near 92.
Wednesday Night
Mostly cloudy, with a low around 72.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 91. Chance of precipitation is 30%.
Thursday Night
Mostly cloudy, with a low around 72.
Friday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 87. Chance of precipitation is 40%.
Friday Night
Mostly cloudy, with a low around 71.
Saturday
Partly sunny, with a high near 86.
Click Map For Forecast
Point Forecast:
Downingtown PA
 40.02°N 75.7°W (Elev. 338 ft)
6:35 am EDT Jul 24, 2016
8am EDT Jul 24, 2016-6pm EDT Jul 30, 2016
 
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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