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

Baltimore / Martin (KMTN)

Lat: 39.33°NLon: 76.42°WElev: 23ft.

Fog/Mist

75°F

24°C

Humidity 94%
Wind Speed Calm
Barometer 29.98 in
Dewpoint 73°F (23°C)
Visibility 5.00 mi
Last update 5 Jul 6:45 am EDT
Extended Forecast for

Gunpowder MD

Heat Advisory July 5, 10:00am until July 5, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: A chance of showers and thunderstorms, mainly after 5pm. Mostly sunny, with a high near 93. Heat index values as high as 103. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 30%.

    High: 93 °F

    Partly Sunny
    then Chance
    Showers

  • Tonight

    Tonight: Showers and thunderstorms before 11pm, then showers likely and possibly a thunderstorm between 11pm and 1am, then a chance of showers and thunderstorms after 1am. Patchy fog between 11pm and 2am. Low around 71. East wind around 6 mph becoming north in the evening. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 71 °F

    Showers and
    Patchy Fog
    then Showers
    Likely and
    Patchy Fog

  • Monday

    Monday: A chance of showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 5pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 85. East wind 5 to 7 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 85 °F

    Chance
    T-storms then
    Showers
    Likely

  • Monday Night

    Monday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8pm. Low around 69. Northeast wind around 6 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 69 °F

    Showers

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 83. Northeast wind 5 to 8 mph. Chance of precipitation is 70%.

    High: 83 °F

    Chance
    Showers then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms, mainly between 8pm and 2am. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.

    Low: 68 °F

    Showers
    Likely then
    Chance
    T-storms

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 2pm, then a slight chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 85. Chance of precipitation is 30%.

    High: 85 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers after 2am. Partly cloudy, with a low around 70. Chance of precipitation is 20%.

    Low: 70 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 2pm. Mostly sunny, with a high near 89. Chance of precipitation is 30%.

    High: 89 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
A chance of showers and thunderstorms, mainly after 5pm. Mostly sunny, with a high near 93. Heat index values as high as 103. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 30%.
Tonight
Showers and thunderstorms before 11pm, then showers likely and possibly a thunderstorm between 11pm and 1am, then a chance of showers and thunderstorms after 1am. Patchy fog between 11pm and 2am. Low around 71. East wind around 6 mph becoming north in the evening. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Monday
A chance of showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 5pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 85. East wind 5 to 7 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8pm. Low around 69. Northeast wind around 6 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 83. Northeast wind 5 to 8 mph. Chance of precipitation is 70%.
Tuesday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms, mainly between 8pm and 2am. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.
Wednesday
A slight chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 2pm, then a slight chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 85. Chance of precipitation is 30%.
Wednesday Night
A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers after 2am. Partly cloudy, with a low around 70. Chance of precipitation is 20%.
Thursday
A chance of showers, with thunderstorms also possible after 2pm. Mostly sunny, with a high near 89. Chance of precipitation is 30%.
Thursday Night
A chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 73. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 92. Chance of precipitation is 50%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Chance of precipitation is 40%.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 88. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Gunpowder MD
 39.4°N 76.42°W (Elev. 138 ft)
Last Update:
4:53 am EDT Jul 5, 2026
Forecast Valid:
7am EDT Jul 5, 2026-6pm EDT Jul 11, 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