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Hazardous Weather Conditions

Current conditions at

Jamestown, Chautauqua County/Jamestown Airport (KJHW)

Lat: 42.15°NLon: 79.27°WElev: 1722ft.

Light Snow

27°F

-3°C

Humidity 85%
Wind Speed W 17 G 23 mph
Barometer 29.85 in (1013.4 mb)
Dewpoint 23°F (-5°C)
Visibility 8.00 mi
Wind Chill14°F (-10°C)
Last update 28 Nov 5:56 am EST
Extended Forecast for

4 Miles NNW Grand Valley PA

Lake Effect Snow Warning November 28, 06:17am until November 29, 01:00am
Click here for hazard details and duration
Lake Effect Snow Warning
  •  
    Lake Effect Snow Warning November 28, 06:17am until November 29, 01:00am

    NOW until 1:00am Sat

    Lake Effect Snow Warning

  • Today

    High: 31 °F

    Snow Showers
    then Snow
    Showers
    Likely

  • Tonight

    Tonight: A chance of snow showers, mainly before 1am. Mostly cloudy, with a low around 19. West wind 6 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 50%. New snow accumulation of less than one inch possible.

    Low: 19 °F

    Chance Snow
    Showers

  • Saturday

    Saturday: Mostly cloudy, with a high near 32. Southwest wind around 5 mph becoming south in the afternoon.

    High: 32 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Snow showers. Low around 24. Southeast wind 5 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.

    Low: 24 °F

    Snow Showers
    Likely then
    Snow Showers

  • Sunday

    Sunday: Snow showers before 10am, then rain and snow showers between 10am and 4pm, then snow showers likely after 4pm. High near 38. South wind around 14 mph becoming southwest in the afternoon. Winds could gust as high as 29 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

    High: 38 °F

    Rain/Snow

  • Sunday Night

    Sunday Night: Snow showers likely, mainly before 1am. Cloudy, with a low around 20. Chance of precipitation is 70%. New snow accumulation of around an inch possible.

    Low: 20 °F

    Snow Showers
    Likely

  • Monday

    Monday: Mostly cloudy, with a high near 29.

    High: 29 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A chance of snow after 1am. Mostly cloudy, with a low around 19. Chance of precipitation is 40%.

    Low: 19 °F

    Mostly Cloudy
    then Chance
    Snow

Detailed Forecast

Today
Snow showers, mainly before 1pm. High near 31. West wind around 14 mph, with gusts as high as 37 mph. Chance of precipitation is 90%. Total daytime snow accumulation of 1 to 3 inches possible.
Tonight
A chance of snow showers, mainly before 1am. Mostly cloudy, with a low around 19. West wind 6 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 50%. New snow accumulation of less than one inch possible.
Saturday
Mostly cloudy, with a high near 32. Southwest wind around 5 mph becoming south in the afternoon.
Saturday Night
Snow showers. Low around 24. Southeast wind 5 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.
Sunday
Snow showers before 10am, then rain and snow showers between 10am and 4pm, then snow showers likely after 4pm. High near 38. South wind around 14 mph becoming southwest in the afternoon. Winds could gust as high as 29 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.
Sunday Night
Snow showers likely, mainly before 1am. Cloudy, with a low around 20. Chance of precipitation is 70%. New snow accumulation of around an inch possible.
Monday
Mostly cloudy, with a high near 29.
Monday Night
A chance of snow after 1am. Mostly cloudy, with a low around 19. Chance of precipitation is 40%.
Tuesday
A chance of snow. Mostly cloudy, with a high near 31. Chance of precipitation is 50%.
Tuesday Night
A chance of snow before 1am. Mostly cloudy, with a low around 17. Chance of precipitation is 30%.
Wednesday
Mostly cloudy, with a high near 30.
Wednesday Night
A chance of snow showers. Mostly cloudy, with a low around 20. Chance of precipitation is 40%.
Thursday
A chance of snow showers. Mostly cloudy, with a high near 31. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNW Grand Valley PA
 41.77°N 79.58°W (Elev. 1696 ft)
Last Update:
1:28 am EST Nov 28, 2025
Forecast Valid:
6am EST Nov 28, 2025-6pm EST Dec 4, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation