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

Heat Wave and Severe Thunderstorms this Independence Day

A prolonged, dangerous heat wave will persist through the Independence Day weekend across the Ohio Valley, Midwest, and Mid-Atlantic. Numerous temperature records are expected. Clusters of severe thunderstorms will move across parts of the Allegheny Plateau into Mid Atlantic this Independence Day, with potential for widespread damaging winds. Additional severe thunderstorms in the Great Plains. Read More >

Hazardous Weather Conditions

Current conditions at

Harford County Airport (K0W3)

Lat: 39.57°NLon: 76.2°WElev: 412ft.

Fair

86°F

30°C

Humidity 55%
Wind Speed Calm
Barometer 29.97 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index89°F (32°C)
Last update 4 Jul 8:35 am EDT
Extended Forecast for

5 Miles N Perry Point MD

Extreme Heat Warning July 4, 10:00am until July 4, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning

  • Independence Day

    Independence Day: Scattered showers and thunderstorms, mainly after 5pm. Some of the storms could be severe. Increasing clouds, with a high near 96. Heat index values as high as 106. Calm wind becoming southwest 5 to 9 mph in the afternoon. Chance of precipitation is 30%.

    High: 96 °F

    Sunny then
    Severe
    Thunderstorms

  • Tonight

    Tonight: Showers and thunderstorms likely before 2am, then isolated showers. Some of the storms could be severe. Mostly cloudy, with a low around 71. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 71 °F

    Severe
    Thunderstorms

  • Sunday

    Sunday: A chance of showers and thunderstorms, mainly after 4pm. Partly sunny, with a high near 87. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 30%.

    High: 87 °F

    Mostly Sunny
    then Chance
    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm. Low around 67. East wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

    Low: 67 °F

    Showers

  • Monday

    Monday: Showers and possibly a thunderstorm. High near 81. East wind around 7 mph. Chance of precipitation is 80%.

    High: 81 °F

    Showers

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 5am, then showers likely. Low around 65. Chance of precipitation is 80%.

    Low: 65 °F

    Showers

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 8am. Mostly cloudy, with a high near 80. Chance of precipitation is 50%.

    High: 80 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 2am, then a slight chance of showers. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.

    Low: 65 °F

    Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers. Partly sunny, with a high near 83. Chance of precipitation is 20%.

    High: 83 °F

    Slight Chance
    Showers

Detailed Forecast

Independence Day
Scattered showers and thunderstorms, mainly after 5pm. Some of the storms could be severe. Increasing clouds, with a high near 96. Heat index values as high as 106. Calm wind becoming southwest 5 to 9 mph in the afternoon. Chance of precipitation is 30%.
Tonight
Showers and thunderstorms likely before 2am, then isolated showers. Some of the storms could be severe. Mostly cloudy, with a low around 71. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
A chance of showers and thunderstorms, mainly after 4pm. Partly sunny, with a high near 87. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 30%.
Sunday Night
Showers and possibly a thunderstorm. Low around 67. East wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Monday
Showers and possibly a thunderstorm. High near 81. East wind around 7 mph. Chance of precipitation is 80%.
Monday Night
Showers and possibly a thunderstorm before 5am, then showers likely. Low around 65. Chance of precipitation is 80%.
Tuesday
A chance of showers, with thunderstorms also possible after 8am. Mostly cloudy, with a high near 80. Chance of precipitation is 50%.
Tuesday Night
A chance of showers and thunderstorms before 2am, then a slight chance of showers. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.
Wednesday
A slight chance of showers. Partly sunny, with a high near 83. Chance of precipitation is 20%.
Wednesday Night
A slight chance of showers before 2am. Partly cloudy, with a low around 67. Chance of precipitation is 20%.
Thursday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 20%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 89. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles N Perry Point MD
 39.67°N 75.96°W (Elev. 358 ft)
Last Update:
8:49 am EDT Jul 4, 2026
Forecast Valid:
8am EDT Jul 4, 2026-6pm EDT Jul 10, 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