Thunderstorms and Heavy Rainfall in the Mid-Atlantic; Fire Weather Concerns in the West

Thunderstorms are expected to bring heavy rain and potential significant flash and urban flooding to the Mid-Atlantic on Thursday, especially along the I-95 urban corridor. Dry conditions, gusty winds, and isolated dry thunderstorms will continue to bring a critical fire weather threat to the northwestern Great Basin into the interior Northwest through Thursday. Read More >

Current conditions at

Baltimore, Inner Harbor (KDMH)

Lat: 39.28°NLon: 76.62°WElev: 20ft.

91°F

33°C

Humidity 56%
Wind Speed NA
Barometer 29.96 in (1014.5 mb)
Dewpoint 73°F (23°C)
Visibility NA
Heat Index100°F (38°C)
Last update 30 Jul 8:53 pm EDT
Extended Forecast for

Marriottsville MD

Flood Watch July 31, 02:00pm until August 1, 02:00am
Click here for hazard details and duration
Flood Watch
  • Tonight

    Tonight: Partly cloudy, with a low around 75. Calm wind.

    Low: 75 °F

    Partly Cloudy

  • Thursday

    Thursday: Showers and thunderstorms likely, mainly after 2pm.  Partly sunny, with a high near 91. Heat index values as high as 102. Calm wind becoming south around 5 mph in the afternoon.  Chance of precipitation is 60%. New rainfall amounts between 1 and 2 inches possible.

    High: 91 °F

    Slight Chance
    T-storms then
    T-storms
    Likely

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 2am, then a chance of showers and thunderstorms after 2am.  Low around 67. Northeast wind 3 to 5 mph.  Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

    Low: 67 °F

    T-storms then
    Showers

  • Friday

    Friday: A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm.  Mostly cloudy, with a high near 74. North wind 6 to 8 mph.  Chance of precipitation is 50%.

    High: 74 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 2am.  Partly cloudy, with a low around 61. North wind around 7 mph.  Chance of precipitation is 20%.

    Low: 61 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 75. Calm wind.
Thursday
Showers and thunderstorms likely, mainly after 2pm. Partly sunny, with a high near 91. Heat index values as high as 102. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between 1 and 2 inches possible.
Thursday Night
Showers and possibly a thunderstorm before 2am, then a chance of showers and thunderstorms after 2am. Low around 67. Northeast wind 3 to 5 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Friday
A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 74. North wind 6 to 8 mph. Chance of precipitation is 50%.
Friday Night
A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 2am. Partly cloudy, with a low around 61. North wind around 7 mph. Chance of precipitation is 20%.
Saturday
Sunny, with a high near 79.
Saturday Night
Mostly clear, with a low around 60.
Sunday
Mostly sunny, with a high near 81.
Sunday Night
Partly cloudy, with a low around 61.
Monday
Mostly sunny, with a high near 83.
Monday Night
Partly cloudy, with a low around 64.
Tuesday
Partly sunny, with a high near 83.
Tuesday Night
Mostly cloudy, with a low around 66.
Wednesday
A chance of showers. Partly sunny, with a high near 81. Chance of precipitation is 30%.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Marriottsville MD
 39.35°N 76.92°W (Elev. 423 ft)
7:30 pm EDT Jul 30, 2025
9pm EDT Jul 30, 2025-6pm EDT Aug 6, 2025
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database