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

Flash Flooding and Severe Thunderstorms Tuesday, July 28th - Wednesday, July 29th

Scattered to numerous thunderstorms are likely across the region Tuesday, July 28th through Wednesday, July 29th which will bring a risk of flash flooding and severe thunderstorms across the entire region. View this briefing for the details regarding these hazards. Read More >

Hazardous Weather Conditions

Current conditions at

Philadelphia, Philadelphia International Airport (KPHL)

Lat: 39.87°NLon: 75.23°WElev: 7ft.

Mostly Cloudy

74°F

23°C

Humidity 91%
Wind Speed S 6 mph
Barometer 29.72 in (1006.3 mb)
Dewpoint 71°F (22°C)
Visibility 7.00 mi
Last update 28 Jul 6:54 am EDT
Extended Forecast for

Folsom PA

Flood Watch July 28, 08:00am until July 29, 02:00pm
Click here for hazard details and duration
Flood Watch

  • Today

    Today: Showers and thunderstorms likely before 2pm, then showers and possibly a thunderstorm between 2pm and 4pm, then showers and thunderstorms likely after 4pm. Some of the storms could produce heavy rainfall. High near 82. Southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

    High: 82 °F

    Chance
    T-storms then
    Heavy Rain

  • Tonight

    Tonight: Showers and thunderstorms before 1am, then a slight chance of showers between 1am and 2am. Some of the storms could produce heavy rainfall. Low around 67. South wind around 5 mph becoming northwest after midnight. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 67 °F

    Heavy Rain
    then Chance
    Showers

  • Wednesday

    Wednesday: A chance of thunderstorms after 5pm. Mostly sunny, with a high near 82. West wind 5 to 10 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 82 °F

    Sunny then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. West wind 5 to 10 mph. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 67 °F

    Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: A chance of showers, mainly after 2pm. Partly sunny, with a high near 81. Northwest wind around 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 81 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers before 8pm. Partly cloudy, with a low around 66. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 66 °F

    Chance
    Showers then
    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 84.

    High: 84 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

Detailed Forecast

Today
Showers and thunderstorms likely before 2pm, then showers and possibly a thunderstorm between 2pm and 4pm, then showers and thunderstorms likely after 4pm. Some of the storms could produce heavy rainfall. High near 82. Southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Tonight
Showers and thunderstorms before 1am, then a slight chance of showers between 1am and 2am. Some of the storms could produce heavy rainfall. Low around 67. South wind around 5 mph becoming northwest after midnight. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.
Wednesday
A chance of thunderstorms after 5pm. Mostly sunny, with a high near 82. West wind 5 to 10 mph. Chance of precipitation is 30%. 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 67. West wind 5 to 10 mph. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
A chance of showers, mainly after 2pm. Partly sunny, with a high near 81. Northwest wind around 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
A chance of showers before 8pm. Partly cloudy, with a low around 66. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Mostly sunny, with a high near 84.
Friday Night
Partly cloudy, with a low around 68.
Saturday
Mostly sunny, with a high near 87.
Saturday Night
Mostly cloudy, with a low around 70.
Sunday
A chance of showers. Partly sunny, with a high near 87. Chance of precipitation is 30%.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 71. Chance of precipitation is 50%.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 87. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Folsom PA
 39.89°N 75.34°W (Elev. 98 ft)
Last Update:
4:08 am EDT Jul 28, 2026
Forecast Valid:
7am EDT Jul 28, 2026-6pm EDT Aug 3, 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