Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

Jamestown, Chautauqua County/Jamestown Airport (KJHW)

Lat: 42.15°NLon: 79.27°WElev: 1722ft.

Mostly Cloudy

70°F

21°C

Humidity 97%
Wind Speed Vrbl 5 mph
Barometer 29.97 in (1014.8 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 19 Aug 12:56 pm EDT
Extended Forecast for

Celoron NY

  • This Afternoon

    This Afternoon: A chance of showers and thunderstorms.  Partly sunny, with a high near 77. West wind around 11 mph.  Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 77 °F

    Chance
    T-storms

  • Tonight

    Tonight: Patchy fog after midnight.  Otherwise, partly cloudy, with a low around 55. West wind around 5 mph becoming calm  in the evening.

    Low: 55 °F

    Partly Cloudy
    then Patchy
    Fog

  • Thursday

    Thursday: A chance of showers before 2pm.  Patchy fog before 10am.  Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 76. Calm wind becoming north around 5 mph in the afternoon.  Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    High: 76 °F

    Chance
    Showers and
    Patchy Fog

  • Thursday Night

    Thursday Night: Areas of fog after 2am.  Otherwise, mostly clear, with a low around 52. Light and variable wind.

    Low: 52 °F

    Clear then
    Areas Fog

  • Friday

    Friday: Areas of fog before 9am.  Otherwise, sunny, with a high near 77. Light east wind.

    High: 77 °F

    Areas Fog
    then Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 56. Northeast wind around 5 mph becoming light and variable  in the evening.

    Low: 56 °F

    Partly Cloudy

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm after 2pm.  Partly sunny, with a high near 80. South wind 6 to 9 mph.  Chance of precipitation is 70%.

    High: 80 °F

    Mostly Sunny
    then Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before 2am, then a chance of showers.  Mostly cloudy, with a low around 57. Southwest wind around 6 mph.  Chance of precipitation is 70%.

    Low: 57 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers likely, with thunderstorms also possible after 2pm.  Partly sunny, with a high near 74. Chance of precipitation is 60%.

    High: 74 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms. Partly sunny, with a high near 77. West wind around 11 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Patchy fog after midnight. Otherwise, partly cloudy, with a low around 55. West wind around 5 mph becoming calm in the evening.
Thursday
A chance of showers before 2pm. Patchy fog before 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 76. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Areas of fog after 2am. Otherwise, mostly clear, with a low around 52. Light and variable wind.
Friday
Areas of fog before 9am. Otherwise, sunny, with a high near 77. Light east wind.
Friday Night
Partly cloudy, with a low around 56. Northeast wind around 5 mph becoming light and variable in the evening.
Saturday
Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 80. South wind 6 to 9 mph. Chance of precipitation is 70%.
Saturday Night
Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Mostly cloudy, with a low around 57. Southwest wind around 6 mph. Chance of precipitation is 70%.
Sunday
Showers likely, with thunderstorms also possible after 2pm. Partly sunny, with a high near 74. Chance of precipitation is 60%.
Sunday Night
A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 53. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 73.
Monday Night
Partly cloudy, with a low around 53.
Tuesday
Mostly sunny, with a high near 77.
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ABOUT THIS FORECAST

 
Point Forecast:
Celoron NY
 42.11°N 79.29°W (Elev. 1309 ft)
9:58 am EDT Aug 19, 2026
1pm EDT Aug 19, 2026-6pm EDT Aug 25, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database