Thunderstorms and Heavy Rains in the Appalachians

Multiple rounds of moderate to locally heavy rain will impact portions of the Appalachians and Mid-Atlantic, which may lead to flash flooding concerns. Thunderstorms with isolated severe wind gusts will be possible this afternoon from parts of the Southeast into the southern and central Appalachians. A multi-day heavy rain will pose a flash flood threat in New Mexico beginning Tuesday. Read More >

Current conditions at

Somerville, Somerset Airport (KSMQ)

Lat: 40.62°NLon: 74.67°WElev: 105ft.

Fair

68°F

20°C

Humidity 59%
Wind Speed NE 8 G 21 mph
Barometer 30.09 in (1018.8 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 21 Sep 11:53 am EDT
Extended Forecast for

Long Valley NJ

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 68. Northeast wind around 5 mph.

    High: 68 °F

    Partly Sunny

  • Tonight

    Tonight: Showers likely, mainly after 3am.  Mostly cloudy, with a low around 50. Northeast wind 5 to 10 mph.  Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 50 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Tuesday

    Tuesday: A chance of showers between 2pm and 3pm.  Mostly cloudy, with a high near 61. Northeast wind around 10 mph, with gusts as high as 20 mph.  Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    High: 61 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 48. Northeast wind around 10 mph, with gusts as high as 20 mph.

    Low: 48 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 63. East wind around 10 mph, with gusts as high as 25 mph.

    High: 63 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 47.

    Low: 47 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 62.

    High: 62 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 47.

    Low: 47 °F

    Mostly Cloudy

  • Friday

    Friday: A chance of showers.  Partly sunny, with a high near 63. Chance of precipitation is 40%.

    High: 63 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Partly sunny, with a high near 68. Northeast wind around 5 mph.
Tonight
Showers likely, mainly after 3am. Mostly cloudy, with a low around 50. Northeast wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
A chance of showers between 2pm and 3pm. Mostly cloudy, with a high near 61. Northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Mostly cloudy, with a low around 48. Northeast wind around 10 mph, with gusts as high as 20 mph.
Wednesday
Mostly cloudy, with a high near 63. East wind around 10 mph, with gusts as high as 25 mph.
Wednesday Night
Mostly cloudy, with a low around 47.
Thursday
Partly sunny, with a high near 62.
Thursday Night
Mostly cloudy, with a low around 47.
Friday
A chance of showers. Partly sunny, with a high near 63. Chance of precipitation is 40%.
Friday Night
A chance of showers. Mostly cloudy, with a low around 49. Chance of precipitation is 40%.
Saturday
A chance of showers. Partly sunny, with a high near 63. Chance of precipitation is 30%.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 50. Chance of precipitation is 30%.
Sunday
Mostly sunny, with a high near 66.
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ABOUT THIS FORECAST

 
Point Forecast:
Long Valley NJ
 40.78°N 74.76°W (Elev. 725 ft)
4:09 am EDT Sep 21, 2026
12pm EDT Sep 21, 2026-6pm EDT Sep 27, 2026
 
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Additional Resources

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