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

Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Hazardous Weather Conditions

Current conditions at

Annapolis, United States Naval Academy (KNAK)

Lat: 38.99°NLon: 76.49°WElev: 3ft.

Fair

84°F

29°C

Humidity 77%
Wind Speed SE 12 mph
Barometer 29.94 in (1013.9 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 17 Aug 12:54 pm EDT
Extended Forecast for

Crownsville MD

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 92. South wind around 6 mph.

    High: 92 °F

    Mostly 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 calm in the evening. Chance of precipitation is 40%.

    Low: 70 °F

    Scattered
    T-storms then
    Isolated
    Showers

  • Monday

    Monday: A slight chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 79. Northeast wind 6 to 9 mph. Chance of precipitation is 50%.

    High: 79 °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
    T-storms then
    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. Partly 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 83. Chance of precipitation is 30%.

    High: 83 °F

    Mostly Sunny
    then Chance
    Showers

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 92. South wind around 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 calm 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. Mostly cloudy, with a high near 79. Northeast 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. Partly cloudy, with a low around 68. Chance of precipitation is 30%.
Thursday
A chance of showers after 2pm. Mostly sunny, with a high near 83. Chance of precipitation is 30%.
Thursday Night
A chance of showers before 8pm. Partly cloudy, with a low around 66. 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 83.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Crownsville MD
 39.04°N 76.6°W (Elev. 98 ft)
Last Update:
10:29 am EDT Aug 17, 2025
Forecast Valid:
1pm 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