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

Briefing for Heat, Severe Storm, and Flash Flood Risks through Thursday

Dangerously hot and humid conditions are expected through Wednesday. There is also a threat of isolated severe thunderstorms on Wednesday. Flash flooding from locally heavy rainfall is possible on Thursday. See this briefing for details on 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

79°F

26°C

Humidity 85%
Wind Speed Calm
Barometer 29.99 in (1015.1 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 30 Jul 10:51 pm EDT
Extended Forecast for

Nazareth PA

Flood Watch July 31, 02:00pm until August 1, 06:00am
Click here for hazard details and duration
Flood Watch

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 3am, then a slight chance of showers after 4am. Partly cloudy, with a low around 71. Calm wind. Chance of precipitation is 20%.

    Low: 71 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 5pm. Some of the storms could produce heavy rainfall. High near 80. Northeast wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 80 °F

    Heavy Rain

  • Thursday Night

    Thursday Night: Showers and thunderstorms before 8pm, then showers and possibly a thunderstorm, mainly after 8pm. Some of the storms could produce heavy rainfall. Low around 62. Northeast wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 62 °F

    Heavy Rain

  • Friday

    Friday: Showers likely and possibly a thunderstorm before 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 71. Northeast wind around 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 71 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 2am. Partly cloudy, with a low around 58. 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: 58 °F

    Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms before 3am, then a slight chance of showers after 4am. Partly cloudy, with a low around 71. Calm wind. Chance of precipitation is 20%.
Thursday
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 5pm. Some of the storms could produce heavy rainfall. High near 80. Northeast wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
Showers and thunderstorms before 8pm, then showers and possibly a thunderstorm, mainly after 8pm. Some of the storms could produce heavy rainfall. Low around 62. Northeast wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Friday
Showers likely and possibly a thunderstorm before 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 71. Northeast wind around 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
A chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 2am. Partly cloudy, with a low around 58. 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.
Saturday
Sunny, with a high near 79.
Saturday Night
Mostly clear, with a low around 56.
Sunday
Sunny, with a high near 82.
Sunday Night
Partly cloudy, with a low around 59.
Monday
Mostly sunny, with a high near 84.
Monday Night
Partly cloudy, with a low around 61.
Tuesday
Partly sunny, with a high near 83.
Tuesday Night
Mostly cloudy, with a low around 63.
Wednesday
A chance of showers. Partly sunny, with a high near 81. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Nazareth PA
 40.73°N 75.3°W (Elev. 400 ft)
Last Update:
4:12 pm EDT Jul 30, 2025
Forecast Valid:
11pm EDT Jul 30, 2025-6pm EDT Aug 6, 2025
 
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