Dangerous Heat Builds and Expands; Critical Fire Weather for the Southwest; Severe Thunderstorms for Plains and Midwest

Dangerous to record breaking heat will build across the center of the nation and slowly build eastward this week. Wildfire conditions remain critical for the Southwest and portions of the Great Basin through Monday. For the northern Plains and upper Midwest, severe thunderstorms with the potential for large to very large hail and severe winds are the primary hazards. Read More >

Current conditions at

Jamestown, Chautauqua County/Jamestown Airport (KJHW)

Lat: 42.15°NLon: 79.27°WElev: 1722ft.

Fair with Haze

63°F

17°C

Humidity NA
Wind Speed Calm
Barometer 30.13 in (1019.9 mb)
Dewpoint N/A
Visibility 4.00 mi
Last update 29 Jun 6:56 am EDT
Extended Forecast for

7 Miles S Youngsville PA

  • Today

    Today: Patchy dense fog before 8am.  Otherwise, mostly sunny, with a high near 90. Light and variable wind.

    High: 90 °F

    Patchy Dense
    Fog then
    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 67. Calm wind.

    Low: 67 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, mainly before 11am.  Partly sunny and hot, with a high near 94. Heat index values as high as 102. Southwest wind 3 to 7 mph.  Chance of precipitation is 30%.

    High: 94 °F

    Chance
    T-storms then
    Partly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am.  Partly cloudy, with a low around 72. Light southwest wind.  Chance of precipitation is 20%.

    Low: 72 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Wednesday

    Wednesday: Sunny and hot, with a high near 95. West wind 3 to 7 mph.

    High: 95 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 72.

    Low: 72 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 72.

    Low: 72 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 93.

    High: 93 °F

    Hot

Detailed Forecast

Today
Patchy dense fog before 8am. Otherwise, mostly sunny, with a high near 90. Light and variable wind.
Tonight
Partly cloudy, with a low around 67. Calm wind.
Tuesday
A chance of showers and thunderstorms, mainly before 11am. Partly sunny and hot, with a high near 94. Heat index values as high as 102. Southwest wind 3 to 7 mph. Chance of precipitation is 30%.
Tuesday Night
A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Partly cloudy, with a low around 72. Light southwest wind. Chance of precipitation is 20%.
Wednesday
Sunny and hot, with a high near 95. West wind 3 to 7 mph.
Wednesday Night
Mostly clear, with a low around 72.
Thursday
Sunny and hot, with a high near 97.
Thursday Night
Mostly clear, with a low around 72.
Friday
Sunny and hot, with a high near 93.
Friday Night
A chance of showers and thunderstorms between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 69. Chance of precipitation is 40%.
Independence Day
A chance of showers and thunderstorms. Partly sunny, with a high near 89. Chance of precipitation is 50%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 30%.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 87. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
7 Miles S Youngsville PA
 41.77°N 79.32°W (Elev. 1440 ft)
6:16 am EDT Jun 29, 2026
7am EDT Jun 29, 2026-6pm EDT Jul 5, 2026
 
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Additional Resources

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