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

Erin Strengthens to a Hurricane; Heavy Rainfall Possible in Puerto Rico and the Virgin Islands, the Upper Midwest, South Texas

Hurricane Erin may bring isolated flash and urban flooding, landslides or mudslides, and possible tropical storm conditions to Puerto Rico and the U.S. Virgin Islands this weekend. Scattered thunderstorms and heavy rainfall may bring areas of flooding this weekend over the Upper Midwest. A tropical disturbance will bring locally heavy rain and mainly urban flash flooding to far southern Texas. Read More >

Hazardous Weather Conditions

Current conditions at

Annapolis, United States Naval Academy (KNAK)

Lat: 38.99°NLon: 76.49°WElev: 3ft.

Fair

74°F

23°C

Humidity 91%
Wind Speed S 5 mph
Barometer 29.99 in (1015.7 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Last update 17 Aug 5:54 am EDT
Extended Forecast for

Arnold MD

  • Today

    Today: Sunny, with a high near 91. Southwest wind 3 to 6 mph.

    High: 91 °F

    Sunny

  • Tonight

    Tonight: Scattered showers and thunderstorms before 2am, then isolated showers between 2am and 3am. Mostly cloudy, with a low around 70. South wind around 6 mph becoming light and variable in the evening. Chance of precipitation is 40%.

    Low: 70 °F

    Scattered
    T-storms

  • Monday

    Monday: A slight chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 78. North wind 6 to 9 mph. Chance of precipitation is 50%.

    High: 78 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. East wind 6 to 9 mph. Chance of precipitation is 40%.

    Low: 67 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 77. East wind around 8 mph. Chance of precipitation is 30%.

    High: 77 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 20%.

    Low: 68 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers after 2pm. Partly sunny, with a high near 82. Chance of precipitation is 30%.

    High: 82 °F

    Partly Sunny
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers before 2am. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.

    Low: 68 °F

    Chance
    Showers

  • Thursday

    Thursday: A chance of showers after 2pm. Mostly sunny, with a high near 82. Chance of precipitation is 30%.

    High: 82 °F

    Mostly Sunny
    then Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 91. Southwest wind 3 to 6 mph.
Tonight
Scattered showers and thunderstorms before 2am, then isolated showers between 2am and 3am. Mostly cloudy, with a low around 70. South wind around 6 mph becoming light and variable in the evening. Chance of precipitation is 40%.
Monday
A slight chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 78. North wind 6 to 9 mph. Chance of precipitation is 50%.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. East wind 6 to 9 mph. Chance of precipitation is 40%.
Tuesday
A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 77. East wind around 8 mph. Chance of precipitation is 30%.
Tuesday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 20%.
Wednesday
A chance of showers after 2pm. Partly sunny, with a high near 82. Chance of precipitation is 30%.
Wednesday Night
A chance of showers before 2am. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.
Thursday
A chance of showers after 2pm. Mostly sunny, with a high near 82. Chance of precipitation is 30%.
Thursday Night
A chance of showers before 8pm. Partly cloudy, with a low around 67. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 83.
Friday Night
Partly cloudy, with a low around 67.
Saturday
Mostly sunny, with a high near 82.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Arnold MD
 39.04°N 76.51°W (Elev. 98 ft)
Last Update:
4:29 am EDT Aug 17, 2025
Forecast Valid:
6am EDT Aug 17, 2025-6pm EDT Aug 23, 2025
 
Forecast Discussion
 
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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation