Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

Philadelphia, Philadelphia International Airport (KPHL)

Lat: 39.87°NLon: 75.23°WElev: 7ft.

Partly Cloudy

88°F

31°C

Humidity 38%
Wind Speed W 12 mph
Barometer 29.90 in (1012.3 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 19 Aug 4:54 pm EDT
Extended Forecast for

2 Miles NW Williamstown NJ

Flood Watch August 20, 12:00pm until August 21, 02:00am
Click here for hazard details and duration
Flood Watch
  • Tonight

    Tonight: Mostly clear, with a low around 68. West wind around 5 mph becoming calm.

    Low: 68 °F

    Mostly Clear

  • Thursday

    Thursday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm.  Increasing clouds, with a high near 82. Calm wind becoming south around 5 mph.  Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 82 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers and thunderstorms before 4am, then a slight chance of showers between 4am and 5am.  Low around 65. Calm wind.  Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 65 °F

    Showers then
    Slight Chance
    Showers

  • Friday

    Friday: A chance of showers after 2pm.  Partly sunny, with a high near 80. Northeast wind around 5 mph.  Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    High: 80 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers.  Mostly cloudy, with a low around 66. Calm wind.  Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 66 °F

    Chance
    Showers

  • Saturday

    Saturday: Showers and possibly a thunderstorm.  High near 80. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 80 °F

    Showers

  • Saturday Night

    Saturday Night: Showers, mainly before 8pm.  Low around 67. Chance of precipitation is 80%.

    Low: 67 °F

    Showers then
    Chance
    Showers

  • Sunday

    Sunday: A chance of showers and thunderstorms after 2pm.  Partly sunny, with a high near 83. Chance of precipitation is 40%.

    High: 83 °F

    Partly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 8pm.  Partly cloudy, with a low around 64. Chance of precipitation is 30%.

    Low: 64 °F

    Chance
    T-storms then
    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 68. West wind around 5 mph becoming calm.
Thursday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Increasing clouds, with a high near 82. Calm wind becoming south around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
Showers and thunderstorms before 4am, then a slight chance of showers between 4am and 5am. Low around 65. Calm wind. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Friday
A chance of showers after 2pm. Partly sunny, with a high near 80. Northeast wind around 5 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
A chance of showers. Mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Showers and possibly a thunderstorm. High near 80. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
Showers, mainly before 8pm. Low around 67. Chance of precipitation is 80%.
Sunday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 83. Chance of precipitation is 40%.
Sunday Night
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 64. Chance of precipitation is 30%.
Monday
Sunny, with a high near 81.
Monday Night
Mostly clear, with a low around 62.
Tuesday
Sunny, with a high near 81.
Tuesday Night
Partly cloudy, with a low around 63.
Wednesday
A chance of showers. Mostly sunny, with a high near 82. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NW Williamstown NJ
 39.7°N 75.03°W (Elev. 112 ft)
5:02 pm EDT Aug 19, 2026
5pm EDT Aug 19, 2026-6pm EDT Aug 26, 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