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

Briefing for Flash Flood and Severe Storm Risks through Tonight

Potentially significant flash flooding is possible this afternoon into tonight. Some isolated severe thunderstorms are also possible. See this briefing for details on these hazards. Read More >

Hazardous Weather Conditions

Current conditions at

Philadelphia, Northeast Philadelphia Airport (KPNE)

Lat: 40.08°NLon: 75.01°WElev: 118ft.

A Few Clouds

90°F

32°C

Humidity 58%
Wind Speed Vrbl 5 mph
Barometer 29.94 in (1013.7 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index99°F (37°C)
Last update 31 Jul 11:54 am EDT
Extended Forecast for

Cornwells PA

Flood Watch July 31, 02:00pm until August 1, 06:00am
Click here for hazard details and duration
Flood Watch

  • This Afternoon

    This Afternoon: Showers and thunderstorms likely, mainly after 2pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 90. East wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 90 °F

    Heavy Rain

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 2am, then a chance of showers after 2am. Some of the storms could produce heavy rainfall. Low around 65. Northeast wind 5 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

    Low: 65 °F

    Heavy Rain

  • Friday

    Friday: Showers likely, mainly before 7am. Mostly cloudy, with a high near 74. Northeast wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 74 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A slight chance of showers before 2am. Partly cloudy, with a low around 62. North wind 5 to 10 mph. Chance of precipitation is 20%.

    Low: 62 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 81. Northeast wind 5 to 10 mph.

    High: 81 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

Detailed Forecast

This Afternoon
Showers and thunderstorms likely, mainly after 2pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 90. East wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.
Tonight
Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 2am, then a chance of showers after 2am. Some of the storms could produce heavy rainfall. Low around 65. Northeast wind 5 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Friday
Showers likely, mainly before 7am. Mostly cloudy, with a high near 74. Northeast wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
A slight chance of showers before 2am. Partly cloudy, with a low around 62. North wind 5 to 10 mph. Chance of precipitation is 20%.
Saturday
Sunny, with a high near 81. Northeast wind 5 to 10 mph.
Saturday Night
Mostly clear, with a low around 61.
Sunday
Sunny, with a high near 84.
Sunday Night
Partly cloudy, with a low around 62.
Monday
Sunny, with a high near 87.
Monday Night
Partly cloudy, with a low around 65.
Tuesday
Mostly sunny, with a high near 87.
Tuesday Night
Mostly cloudy, with a low around 66.
Wednesday
Partly sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Cornwells PA
 40.07°N 74.96°W (Elev. 39 ft)
Last Update:
4:11 am EDT Jul 31, 2025
Forecast Valid:
12pm EDT Jul 31, 2025-6pm EDT Aug 6, 2025
 
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