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Heavy Rain in the Southern Appalachians; Fire Weather and Heat in the West; Monitoring Tropical Storm Erin

Heavy to excessive rainfall over the southern Appalachians may bring areas of flooding today. Gusty winds and low relative humidity will bring critical fire weather conditions to parts of the Great Basin and northern Rockies today and Thursday. Hot to extremely hot temperatures are in place through today across parts of the western U.S. Read More >

Hazardous Weather Conditions

Current conditions at

Somerville, Somerset Airport (KSMQ)

Lat: 40.62°NLon: 74.67°WElev: 105ft.

Partly Cloudy

88°F

31°C

Humidity 63%
Wind Speed Vrbl 6 G 20 mph
Barometer 29.86 in (1011.0 mb)
Dewpoint 74°F (23°C)
Visibility 7.00 mi
Heat Index97°F (36°C)
Last update 13 Aug 12:53 pm EDT
Extended Forecast for

Manville NJ

Flood Watch August 13, 02:00pm until August 14, 01:00am
Click here for hazard details and duration
Flood Watch

  • This Afternoon

    This Afternoon: A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 92. South wind around 5 mph. Chance of precipitation is 40%. New rainfall amounts between a quarter and half of an inch possible.

    High: 92 °F

    Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely before 2am, then a chance of showers. Some of the storms could produce heavy rainfall. Patchy fog after 9pm. Otherwise, mostly cloudy, with a low around 69. Calm wind. Chance of precipitation is 60%. New rainfall amounts between three quarters and one inch possible.

    Low: 69 °F

    Heavy Rain
    and Patchy
    Fog

  • Thursday

    Thursday: A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 91. Calm wind becoming northwest around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 91 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 68. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 68 °F

    Showers
    Likely then
    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 88. North wind around 5 mph becoming east in the afternoon.

    High: 88 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 67.

    Low: 67 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 92.

    High: 92 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 92. South wind around 5 mph. Chance of precipitation is 40%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Showers and thunderstorms likely before 2am, then a chance of showers. Some of the storms could produce heavy rainfall. Patchy fog after 9pm. Otherwise, mostly cloudy, with a low around 69. Calm wind. Chance of precipitation is 60%. New rainfall amounts between three quarters and one inch possible.
Thursday
A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 91. Calm wind becoming northwest around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers likely and possibly a thunderstorm before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 68. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Sunny, with a high near 88. North wind around 5 mph becoming east in the afternoon.
Friday Night
Partly cloudy, with a low around 67.
Saturday
Mostly sunny, with a high near 88.
Saturday Night
Mostly clear, with a low around 66.
Sunday
Mostly sunny, with a high near 92.
Sunday Night
Partly cloudy, with a low around 67.
Monday
Mostly sunny, with a high near 88.
Monday Night
Partly cloudy, with a low around 63.
Tuesday
Mostly sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Manville NJ
 40.52°N 74.61°W (Elev. 82 ft)
Last Update:
4:13 am EDT Aug 13, 2025
Forecast Valid:
1pm EDT Aug 13, 2025-6pm EDT Aug 19, 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