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

Severe Thunderstorms and Flooding from the Southern Plains to the Great Lakes; Record Heat in the East

Widely scattered severe thunderstorms may produce damaging winds, hail, and flash flooding from the southern Plains into the lower Great Lakes. Elevated to locally critical fire weather conditions will persist across portions of the Southwest and Southern High Plains due to gusty winds and dry conditions. An early-season heatwave will challenge temperature records across the eastern U.S.. Read More >

Current conditions at

Annapolis, United States Naval Academy (KNAK)

Lat: 38.99°NLon: 76.49°WElev: 3ft.

Fair

78°F

26°C

Humidity 60%
Wind Speed Calm
Barometer 30.01 in (1016.4 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 20 May 3:54 am EDT
Extended Forecast for

Londontowne MD

  • Today

    Today: A chance of showers and thunderstorms between 3pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Increasing clouds, with a high near 92. Southwest wind 3 to 8 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 92 °F

    Sunny then
    Showers
    Likely

  • Tonight

    Tonight: Showers likely and possibly a thunderstorm before 7pm, then a chance of showers and thunderstorms between 7pm and 2am, then a chance of showers after 2am. Cloudy, with a low around 59. North wind around 5 mph becoming calm. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 59 °F

    Showers
    Likely

  • Thursday

    Thursday: Showers and thunderstorms likely, mainly before 11am, then showers likely and possibly a thunderstorm after 1pm. Cloudy, with a high near 67. North wind around 10 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 67 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely, mainly after 2am. Mostly cloudy, with a low around 54. Northeast wind 3 to 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 54 °F

    Showers
    Likely

  • Friday

    Friday: Showers. High near 64. East wind 9 to 13 mph, with gusts as high as 18 mph. Chance of precipitation is 80%.

    High: 64 °F

    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 52. Chance of precipitation is 90%.

    Low: 52 °F

    Showers

  • Saturday

    Saturday: Showers. High near 65. Chance of precipitation is 90%.

    High: 65 °F

    Showers

  • Saturday Night

    Saturday Night: Showers likely, mainly before 2am. Cloudy, with a low around 57. Chance of precipitation is 70%.

    Low: 57 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers. Mostly cloudy, with a high near 71. Chance of precipitation is 40%.

    High: 71 °F

    Chance
    Showers

Detailed Forecast

Today
A chance of showers and thunderstorms between 3pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Increasing clouds, with a high near 92. Southwest wind 3 to 8 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers likely and possibly a thunderstorm before 7pm, then a chance of showers and thunderstorms between 7pm and 2am, then a chance of showers after 2am. Cloudy, with a low around 59. North wind around 5 mph becoming calm. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers and thunderstorms likely, mainly before 11am, then showers likely and possibly a thunderstorm after 1pm. Cloudy, with a high near 67. North wind around 10 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 54. Northeast wind 3 to 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Showers. High near 64. East wind 9 to 13 mph, with gusts as high as 18 mph. Chance of precipitation is 80%.
Friday Night
Showers and possibly a thunderstorm. Low around 52. Chance of precipitation is 90%.
Saturday
Showers. High near 65. Chance of precipitation is 90%.
Saturday Night
Showers likely, mainly before 2am. Cloudy, with a low around 57. Chance of precipitation is 70%.
Sunday
A chance of showers. Mostly cloudy, with a high near 71. Chance of precipitation is 40%.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 61. Chance of precipitation is 50%.
Memorial Day
A chance of showers. Mostly cloudy, with a high near 80. Chance of precipitation is 50%.
Monday Night
A chance of showers. Mostly cloudy, with a low around 64. Chance of precipitation is 40%.
Tuesday
A chance of showers. Mostly cloudy, with a high near 82. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Londontowne MD
 38.95°N 76.55°W (Elev. 3 ft)
Last Update:
2:22 am EDT May 20, 2026
Forecast Valid:
4am EDT May 20, 2026-6pm EDT May 26, 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