National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Dangerous Heat Wave Continues; Areas of Severe Thunderstorms Today

Dangerous, record-breaking heat will continue across most of the central and eastern U.S through Friday then focusing on the eastern U.S. through the Independence Day weekend. Peak heat indices of up to 115 degrees are possible. Strong to severe thunderstorms will be possible from the northern Plains into the Midwest and Great Lakes regions, as well as across the southern Appalachians today. Read More >

Hazardous Weather Conditions

Current conditions at

Harford County Airport (K0W3)

Lat: 39.57°NLon: 76.2°WElev: 412ft.

Fair

99°F

37°C

Humidity 47%
Wind Speed SW 6 mph
Barometer 30.03 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index113°F (45°C)
Last update 2 Jul 2:35 pm EDT
Extended Forecast for

3 Miles WNW Charlestown MD

Extreme Heat Warning July 3, 10:00am until July 3, 08:00pm
Extreme Heat Warning July 4, 10:00am until July 4, 08:00pm
Extreme Heat Warning July 2, 02:46pm until July 2, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
Extreme Heat Warning
Extreme Heat Warning
  •  
    Extreme Heat Warning July 2, 02:46pm until July 2, 08:00pm

    NOW until 8:00pm Thu

    Extreme Heat Warning

  • This Afternoon

    High: 100 °F

    Hot

  • Tonight

    Tonight: Clear, with a low around 79. Southwest wind around 6 mph becoming light and variable after midnight.

    Low: 79 °F

    Clear

  • Friday

    Friday: Sunny and hot, with a high near 100. Heat index values as high as 109. Light and variable wind becoming northwest around 6 mph in the morning.

    High: 100 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 78. Light and variable wind.

    Low: 78 °F

    Mostly Clear

  • Independence Day

    Independence Day: A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 99. West wind 3 to 8 mph. Chance of precipitation is 30%.

    High: 99 °F

    Sunny then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 74. Chance of precipitation is 50%.

    Low: 74 °F

    Chance
    T-storms

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 92. Chance of precipitation is 60%.

    High: 92 °F

    Partly Sunny
    then Showers
    Likely

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 70. Chance of precipitation is 70%.

    Low: 70 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 100. Heat index values as high as 111. Southwest wind 5 to 7 mph.
Tonight
Clear, with a low around 79. Southwest wind around 6 mph becoming light and variable after midnight.
Friday
Sunny and hot, with a high near 100. Heat index values as high as 109. Light and variable wind becoming northwest around 6 mph in the morning.
Friday Night
Mostly clear, with a low around 78. Light and variable wind.
Independence Day
A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 99. West wind 3 to 8 mph. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 74. Chance of precipitation is 50%.
Sunday
Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 92. Chance of precipitation is 60%.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 70. Chance of precipitation is 70%.
Monday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 82. Chance of precipitation is 70%.
Monday Night
Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 82. Chance of precipitation is 30%.
Tuesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 67. Chance of precipitation is 20%.
Wednesday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 20%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Charlestown MD
 39.61°N 76.03°W (Elev. 217 ft)
Last Update:
2:23 pm EDT Jul 2, 2026
Forecast Valid:
2pm EDT Jul 2, 2026-6pm EDT Jul 8, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation