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.

Fair

58°F

14°C

Humidity 100%
Wind Speed S 5 mph
Barometer 29.98 in (1014.8 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 19 Aug 2:56 am EDT
Extended Forecast for

3 Miles ENE Dewittville NY

  • Overnight

    Overnight: Partly cloudy, with a low around 59. Southwest wind around 7 mph.

    Low: 59 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms, mainly between 1pm and 4pm.  Partly sunny, with a high near 76. Southwest wind 7 to 13 mph.  Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 76 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Patchy fog after 5am.  Otherwise, partly cloudy, with a low around 55. West wind around 6 mph becoming light and variable  in the evening.

    Low: 55 °F

    Partly Cloudy
    then Patchy
    Fog

  • Thursday

    Thursday: A chance of showers before 2pm.  Mostly cloudy, then gradual clearing during the afternoon, with a high near 74. Light and variable wind becoming north around 6 mph in the afternoon.  Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 74 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Patchy fog after 2am.  Otherwise, mostly clear, with a low around 53. Calm wind.

    Low: 53 °F

    Clear then
    Patchy Fog

  • Friday

    Friday: Patchy fog before 9am.  Otherwise, sunny, with a high near 77. East wind 3 to 5 mph.

    High: 77 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 57. Northeast wind around 6 mph becoming south after midnight.

    Low: 57 °F

    Partly Cloudy

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm after 2pm.  Partly sunny, with a high near 79. Southwest wind 7 to 9 mph.  Chance of precipitation is 70%.

    High: 79 °F

    Mostly Sunny
    then Showers
    Likely

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm, mainly before 2am, then a chance of showers and thunderstorms after 2am.  Low around 57. Chance of precipitation is 80%.

    Low: 57 °F

    Showers

Detailed Forecast

Overnight
Partly cloudy, with a low around 59. Southwest wind around 7 mph.
Wednesday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms, mainly between 1pm and 4pm. Partly sunny, with a high near 76. Southwest wind 7 to 13 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Patchy fog after 5am. Otherwise, partly cloudy, with a low around 55. West wind around 6 mph becoming light and variable in the evening.
Thursday
A chance of showers before 2pm. Mostly cloudy, then gradual clearing during the afternoon, with a high near 74. Light and variable wind becoming north around 6 mph in the afternoon. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Patchy fog after 2am. Otherwise, mostly clear, with a low around 53. Calm wind.
Friday
Patchy fog before 9am. Otherwise, sunny, with a high near 77. East wind 3 to 5 mph.
Friday Night
Partly cloudy, with a low around 57. Northeast wind around 6 mph becoming south after midnight.
Saturday
Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 79. Southwest wind 7 to 9 mph. Chance of precipitation is 70%.
Saturday Night
Showers and possibly a thunderstorm, mainly before 2am, then a chance of showers and thunderstorms after 2am. Low around 57. Chance of precipitation is 80%.
Sunday
Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 73. Chance of precipitation is 60%.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 54. Chance of precipitation is 40%.
Monday
Mostly sunny, with a high near 72.
Monday Night
Partly cloudy, with a low around 54.
Tuesday
Mostly sunny, with a high near 75.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ENE Dewittville NY
 42.25°N 79.36°W (Elev. 1411 ft)
2:33 am EDT Aug 19, 2026
3am EDT Aug 19, 2026-6pm EDT Aug 25, 2026
 
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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