Severe Thunderstorms and Flash Flooding Risks - Saturday, July 18th

Scattered to numerous severe thunderstorms are likely across the region on Saturday, July 18th, including a risk of flash flooding for portions of the area. View this briefing for the details regarding these hazards. Read More >

Current conditions at

Philadelphia, Philadelphia International Airport (KPHL)

Lat: 39.87°NLon: 75.23°WElev: 7ft.

Smoke

90°F

32°C

Humidity 66%
Wind Speed SW 16 mph
Barometer 29.80 in (1009.0 mb)
Dewpoint 77°F (25°C)
Visibility 4.00 mi
Heat Index103°F (39°C)
Last update 18 Jul 2:54 pm EDT
Extended Forecast for

Philadelphia PA

Flood Watch until July 19, 02:00am
Tornado Watch until July 18, 09:00pm
Click here for hazard details and duration
Flood Watch
Tornado Watch
  •  
    Flood Watch until July 19, 02:00am
    Tornado Watch until July 18, 09:00pm

    NOW: Multiple hazards in effect

    Click HERE for Details

  • This Afternoon

    High: 87 °F

    Severe
    Thunderstorms

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 9pm, then a chance of showers and thunderstorms between 9pm and 2am, then a slight chance of showers after 2am. Some of the storms could be severe.  Patchy smoke before 7pm. Low around 73. Southwest wind 5 to 10 mph.  Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

    Low: 73 °F

    Severe
    Thunderstorms
    then Chance
    T-storms

  • Sunday

    Sunday: Sunny, with a high near 85. Northwest wind around 10 mph.

    High: 85 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 67. North wind around 5 mph.

    Low: 67 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 86. Northeast wind around 5 mph becoming calm.

    High: 86 °F

    Sunny

  • Monday Night

    Monday Night: A chance of showers and thunderstorms after 2am.  Mostly cloudy, with a low around 71. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 71 °F

    Partly Cloudy
    then Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm.  Cloudy, with a high near 84. Chance of precipitation is 60%.

    High: 84 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 2am, then showers likely.  Low around 72. Chance of precipitation is 90%.

    Low: 72 °F

    Showers

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4pm. Some of the storms could be severe. Areas of smoke. Mostly cloudy, with a high near 87. Southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Showers and possibly a thunderstorm before 9pm, then a chance of showers and thunderstorms between 9pm and 2am, then a slight chance of showers after 2am. Some of the storms could be severe. Patchy smoke before 7pm. Low around 73. Southwest wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Sunday
Sunny, with a high near 85. Northwest wind around 10 mph.
Sunday Night
Mostly clear, with a low around 67. North wind around 5 mph.
Monday
Sunny, with a high near 86. Northeast wind around 5 mph becoming calm.
Monday Night
A chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 71. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Cloudy, with a high near 84. Chance of precipitation is 60%.
Tuesday Night
Showers and possibly a thunderstorm before 2am, then showers likely. Low around 72. Chance of precipitation is 90%.
Wednesday
Showers likely, with thunderstorms also possible after 2pm. Partly sunny, with a high near 85. Chance of precipitation is 60%.
Wednesday Night
Showers likely and possibly a thunderstorm before 8pm. Partly cloudy, with a low around 66. Chance of precipitation is 60%.
Thursday
Mostly sunny, with a high near 82.
Thursday Night
Mostly clear, with a low around 65.
Friday
Sunny, with a high near 85.
Friday Night
Partly cloudy, with a low around 68.
Saturday
A chance of showers. Mostly sunny, with a high near 87.
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ABOUT THIS FORECAST

 
Point Forecast:
Philadelphia PA
 39.96°N 75.16°W (Elev. 26 ft)
2:02 pm EDT Jul 18, 2026
3pm EDT Jul 18, 2026-6pm EDT Jul 25, 2026
 
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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