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

Lala Impacting Hawaii; Flash Flooding Risks; Excessive Heat

Lala will continue to impact Hawaii through the weekend. Heavy rainfall, strong winds, dangerous surf and localized flooding are expected. Thunderstorms, heavy rainfall and flash flooding concerns from the mid-Mississippi Valley, Ohio Valley into the central Appalachians and the mid-Atlantic through today. Record heat continues for areas of the Mississippi Valley into the Southeast. Read More >

Current conditions at

Philadelphia, Philadelphia International Airport (KPHL)

Lat: 39.87°NLon: 75.23°WElev: 7ft.

Overcast

80°F

27°C

Humidity 62%
Wind Speed S 10 mph
Barometer 30.06 in (1018.0 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 16 Aug 1:54 pm EDT
Extended Forecast for

Marcus Hook PA

  • This Afternoon

    This Afternoon: Showers and possibly a thunderstorm. High near 80. South wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 80 °F

    Showers

  • Tonight

    Tonight: Showers and possibly a thunderstorm, mainly before 4am, then a chance of showers and thunderstorms after 4am. Patchy fog after 1am. Low around 70. Southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 70 °F

    Showers and
    Patchy Fog

  • Monday

    Monday: A slight chance of showers, then a chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 88. Northwest wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 88 °F

    Partly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 71. North wind around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 71 °F

    Chance
    T-storms then
    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 87. North wind around 5 mph.

    High: 87 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers after 2am. Partly cloudy, with a low around 71. Chance of precipitation is 40%.

    Low: 71 °F

    Partly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: A chance of showers. Partly sunny, with a high near 86. Chance of precipitation is 40%.

    High: 86 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm. High near 80. South wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and possibly a thunderstorm, mainly before 4am, then a chance of showers and thunderstorms after 4am. Patchy fog after 1am. Low around 70. Southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Monday
A slight chance of showers, then a chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 88. Northwest wind around 5 mph. Chance of precipitation is 30%. 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, mainly before 7pm. Partly cloudy, with a low around 71. North wind around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
Sunny, with a high near 87. North wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 68.
Wednesday
Sunny, with a high near 88.
Wednesday Night
A chance of showers after 2am. Partly cloudy, with a low around 71. Chance of precipitation is 40%.
Thursday
A chance of showers. Partly sunny, with a high near 86. Chance of precipitation is 40%.
Thursday Night
Partly cloudy, with a low around 67.
Friday
A chance of showers. Mostly sunny, with a high near 84. Chance of precipitation is 30%.
Friday Night
A chance of showers. Mostly cloudy, with a low around 67. Chance of precipitation is 40%.
Saturday
A chance of showers. Partly sunny, with a high near 83. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marcus Hook PA
 39.81°N 75.42°W (Elev. 0 ft)
Last Update:
4:09 am EDT Aug 16, 2026
Forecast Valid:
2pm EDT Aug 16, 2026-6pm EDT Aug 22, 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