Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Central U.S. and Northeast; Critical Fire Weather in the Four Corners

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Severe thunderstorms are forecast from parts of the central High Plains into the Upper Midwest, and across parts of the Northeast. Critical fire weather conditions will continue across portions of the Four Corners and Great Basin. Read More >

Current conditions at

Du Bois - Jefferson County Airport (KDUJ)

Lat: 41.18°NLon: 78.89°WElev: 1804ft.

Partly Cloudy

83°F

28°C

Humidity 67%
Wind Speed SW 12 G 16 mph
Barometer 30.11 in (1018.1 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 30 Jun 12:53 pm EDT
Extended Forecast for

Saint Marys PA

Heat Advisory July 1, 12:00pm until July 3, 08:00pm
Click here for hazard details and duration
Heat Advisory
  • This Afternoon

    This Afternoon: Isolated showers before 3pm.  Partly sunny, with a high near 89. Southwest wind around 8 mph.  Chance of precipitation is 20%.

    High: 89 °F

    Isolated
    Showers

  • Tonight

    Tonight: Isolated showers and thunderstorms before 9pm, then isolated showers between 9pm and midnight.  Partly cloudy, with a low around 70. Light southwest wind.  Chance of precipitation is 20%.

    Low: 70 °F

    Isolated
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 93. Heat index values as high as 100. West wind 5 to 8 mph.

    High: 93 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 70. Light west wind.

    Low: 70 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 95. Calm wind becoming west 5 to 9 mph in the morning.

    High: 95 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 71.

    Low: 71 °F

    Mostly Clear

  • Friday

    Friday: A chance of showers and thunderstorms after 2pm.  Mostly sunny and hot, with a high near 93. Chance of precipitation is 30%.

    High: 93 °F

    Sunny then
    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 8pm.  Mostly cloudy, with a low around 68. Chance of precipitation is 30%.

    Low: 68 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Independence Day

    Independence Day: A chance of showers and thunderstorms after 2pm.  Partly sunny, with a high near 89. Chance of precipitation is 40%.

    High: 89 °F

    Partly Sunny
    then Chance
    T-storms

Detailed Forecast

This Afternoon
Isolated showers before 3pm. Partly sunny, with a high near 89. Southwest wind around 8 mph. Chance of precipitation is 20%.
Tonight
Isolated showers and thunderstorms before 9pm, then isolated showers between 9pm and midnight. Partly cloudy, with a low around 70. Light southwest wind. Chance of precipitation is 20%.
Wednesday
Mostly sunny and hot, with a high near 93. Heat index values as high as 100. West wind 5 to 8 mph.
Wednesday Night
Mostly clear, with a low around 70. Light west wind.
Thursday
Sunny and hot, with a high near 95. Calm wind becoming west 5 to 9 mph in the morning.
Thursday Night
Mostly clear, with a low around 71.
Friday
A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 93. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.
Independence Day
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 89. Chance of precipitation is 40%.
Saturday Night
A chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 64. Chance of precipitation is 30%.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 87. Chance of precipitation is 40%.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Chance of precipitation is 40%.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 85. Chance of precipitation is 50%.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Marys PA
 41.44°N 78.57°W (Elev. 1795 ft)
12:46 pm EDT Jun 30, 2026
1pm EDT Jun 30, 2026-6pm EDT Jul 6, 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