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

Allentown, Lehigh Valley International Airport (KABE)

Lat: 40.65°NLon: 75.45°WElev: 384ft.

Fair

64°F

18°C

Humidity 96%
Wind Speed Calm
Barometer 29.73 in (1006.5 mb)
Dewpoint 63°F (17°C)
Visibility 8.00 mi
Last update 28 Jul 5:51 am EDT
Extended Forecast for

Stewartsville NJ

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

  • Today

    Today: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after noon. Some of the storms could produce heavy rainfall. High near 77. Light south wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.

    High: 77 °F

    Chance
    T-storms then
    Heavy Rain

  • Tonight

    Tonight: Showers and possibly a thunderstorm before midnight, then a chance of showers. Some of the storms could produce heavy rainfall. Low around 63. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%. New precipitation amounts between three quarters and one inch possible.

    Low: 63 °F

    Heavy Rain
    then Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers before noon, then a slight chance of showers and thunderstorms between noon and 2pm, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 78. West wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Mostly Sunny
    then Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 7pm, then a chance of showers and thunderstorms between 7pm and 11pm, then a chance of showers after 11pm. Mostly cloudy, with a low around 62. West wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 62 °F

    Showers
    Likely

  • Thursday

    Thursday: A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 77. North wind 5 to 10 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 77 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 61. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 61 °F

    Chance
    Showers then
    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

Detailed Forecast

Today
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after noon. Some of the storms could produce heavy rainfall. High near 77. Light south wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
Tonight
Showers and possibly a thunderstorm before midnight, then a chance of showers. Some of the storms could produce heavy rainfall. Low around 63. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%. New precipitation amounts between three quarters and one inch possible.
Wednesday
A slight chance of showers before noon, then a slight chance of showers and thunderstorms between noon and 2pm, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 78. West wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers likely and possibly a thunderstorm before 7pm, then a chance of showers and thunderstorms between 7pm and 11pm, then a chance of showers after 11pm. Mostly cloudy, with a low around 62. West wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 77. North wind 5 to 10 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 61. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Mostly sunny, with a high near 81.
Friday Night
Partly cloudy, with a low around 62.
Saturday
Mostly sunny, with a high near 83.
Saturday Night
Mostly cloudy, with a low around 65.
Sunday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 83. Chance of precipitation is 50%.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 50%.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Stewartsville NJ
 40.71°N 75.13°W (Elev. 528 ft)
Last Update:
4:08 am EDT Jul 28, 2026
Forecast Valid:
6am 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