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

St Marys County Airport (K2W6)

Lat: 38.32°NLon: 76.55°WElev: 144ft.

Fair

98°F

37°C

Humidity 42%
Wind Speed SE 8 mph
Barometer 29.89 in
Dewpoint 71°F (22°C)
Visibility NA
Heat Index106°F (41°C)
Last update 4 Jul 5:15 pm EDT
Extended Forecast for

Broomes Island MD

Severe T-storm Watch until July 4, 10:00pm
Extreme Heat Warning July 4, 05:37pm until July 4, 09:00pm
Click here for hazard details and duration
Severe T-storm Watch
Extreme Heat Warning
  •  
    Severe T-storm Watch until July 4, 10:00pm
    Extreme Heat Warning July 4, 05:37pm until July 4, 09:00pm

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Independence Day

    High: 101 °F

    Severe
    Thunderstorms

  • Tonight

    Tonight: Showers and thunderstorms before midnight, then a slight chance of showers between midnight and 3am. Some of the storms could be severe. Low around 75. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 75 °F

    Severe
    Thunderstorms
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: Sunny, with a high near 94. Heat index values as high as 102. Calm wind becoming southeast 5 to 7 mph in the afternoon.

    High: 94 °F

    Sunny

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 2am, then a slight chance of showers between 2am and 3am. Increasing clouds, with a low around 74. South wind 5 to 8 mph becoming northeast after midnight. Chance of precipitation is 50%.

    Low: 74 °F

    Chance
    T-storms then
    Slight Chance
    T-storms

  • Monday

    Monday: Showers likely, then showers and possibly a thunderstorm after 11am. High near 88. East wind 3 to 6 mph. Chance of precipitation is 90%.

    High: 88 °F

    Showers
    Likely then
    Showers

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 2am, then a chance of showers and thunderstorms after 2am. Low around 71. Chance of precipitation is 80%.

    Low: 71 °F

    Showers

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 40%.

    High: 84 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 70. Chance of precipitation is 30%.

    Low: 70 °F

    Chance
    T-storms

Detailed Forecast

Independence Day
Showers and thunderstorms likely. Some of the storms could be severe. Mostly cloudy and hot, with a high near 101. Heat index values as high as 106. Southeast wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms before midnight, then a slight chance of showers between midnight and 3am. Some of the storms could be severe. Low around 75. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
Sunny, with a high near 94. Heat index values as high as 102. Calm wind becoming southeast 5 to 7 mph in the afternoon.
Sunday Night
A chance of showers and thunderstorms before 2am, then a slight chance of showers between 2am and 3am. Increasing clouds, with a low around 74. South wind 5 to 8 mph becoming northeast after midnight. Chance of precipitation is 50%.
Monday
Showers likely, then showers and possibly a thunderstorm after 11am. High near 88. East wind 3 to 6 mph. Chance of precipitation is 90%.
Monday Night
Showers and possibly a thunderstorm before 2am, then a chance of showers and thunderstorms after 2am. Low around 71. Chance of precipitation is 80%.
Tuesday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 40%.
Tuesday Night
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 70. Chance of precipitation is 30%.
Wednesday
Mostly sunny, with a high near 85.
Wednesday Night
Partly cloudy, with a low around 71.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 90. Chance of precipitation is 20%.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 74. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 93. Chance of precipitation is 40%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 74. Chance of precipitation is 40%.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 90.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Broomes Island MD
 38.41°N 76.56°W (Elev. 3 ft)
Last Update:
4:53 pm EDT Jul 4, 2026
Forecast Valid:
5pm EDT Jul 4, 2026-6pm EDT Jul 11, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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