Lala Impacting Hawaii; Severe Thunderstorm and Flash Flooding Risks; Excessive Heat

Areas of gusty winds, heavy rain leading to flash flooding, and high surf continue across portions of Hawaii as Tropical Storm Lala continues to move away from the islands. Severe thunderstorm, heavy rainfall, and flash flooding threats continue from the Midwest to the Mid-Atlantic and across the central High Plains. Record heat continues for areas of the central/southern Plain into the Southeast Read More >

Current conditions at

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Light Rain

68°F

20°C

Humidity 93%
Wind Speed S 7 mph
Barometer 29.88 in (1011.0 mb)
Dewpoint 66°F (19°C)
Visibility 8.00 mi
Last update 17 Aug 1:53 am EDT
Extended Forecast for

Yardley PA

  • Overnight

    Overnight: Showers and possibly a thunderstorm, mainly before 5am, then a chance of showers and thunderstorms after 5am.  Patchy fog after 3am. Low around 67. South wind around 5 mph.  Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 67 °F

    Showers and
    Patchy Fog

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 5pm.  Patchy fog before 11am.  Otherwise, partly sunny, with a high near 87. Northwest 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.

    High: 87 °F

    Chance
    Showers and
    Patchy Fog
    then Partly
    Sunny

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 9pm.  Patchy fog before 2am, then patchy fog after 4am.  Otherwise, mostly cloudy, with a low around 70. North wind around 5 mph.  Chance of precipitation is 20%.

    Low: 70 °F

    Slight Chance
    T-storms then
    Patchy Fog

  • Tuesday

    Tuesday: Mostly sunny, with a high near 86. North wind around 5 mph.

    High: 86 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 66. Northwest wind around 5 mph becoming calm.

    Low: 66 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 69.

    Low: 69 °F

    Partly Cloudy

  • Thursday

    Thursday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm.  Partly sunny, with a high near 85. Chance of precipitation is 60%.

    High: 85 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers.  Mostly cloudy, with a low around 64. Chance of precipitation is 60%.

    Low: 64 °F

    Showers
    Likely

Detailed Forecast

Overnight
Showers and possibly a thunderstorm, mainly before 5am, then a chance of showers and thunderstorms after 5am. Patchy fog after 3am. Low around 67. South wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
A chance of showers, with thunderstorms also possible after 5pm. Patchy fog before 11am. Otherwise, partly sunny, with a high near 87. Northwest 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.
Monday Night
A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 9pm. Patchy fog before 2am, then patchy fog after 4am. Otherwise, mostly cloudy, with a low around 70. North wind around 5 mph. Chance of precipitation is 20%.
Tuesday
Mostly sunny, with a high near 86. North wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 66. Northwest wind around 5 mph becoming calm.
Wednesday
Sunny, with a high near 88.
Wednesday Night
Partly cloudy, with a low around 69.
Thursday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 85. Chance of precipitation is 60%.
Thursday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers. Mostly cloudy, with a low around 64. Chance of precipitation is 60%.
Friday
A chance of showers after 2pm. Mostly sunny, with a high near 84. Chance of precipitation is 30%.
Friday Night
A chance of showers. Mostly cloudy, with a low around 65. Chance of precipitation is 50%.
Saturday
A chance of showers. Mostly cloudy, with a high near 81. Chance of precipitation is 50%.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 64. Chance of precipitation is 50%.
Sunday
A chance of showers. Partly sunny, with a high near 82. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Yardley PA
 40.25°N 74.84°W (Elev. 69 ft)
2:18 am EDT Aug 17, 2026
2am EDT Aug 17, 2026-6pm EDT Aug 23, 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