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

Heavy Rainfall in the Southern Plains and Mississippi Valley; Thunderstorms in Eastern Colorado on Thursday

A multiple day heavy rainfall event will begin to set up from the Southern Plains into the Mississippi Valley Thursday, peaking in intensity over the holiday weekend. Widely scattered thunderstorms are expected to develop across eastern Colorado Thursday afternoon and evening. Large hail will be the primary hazard. Read More >

Current conditions at

St Marys County Airport (K2W6)

Lat: 38.32°NLon: 76.55°WElev: 144ft.

Overcast

69°F

21°C

Humidity 75%
Wind Speed Calm
Barometer 30.15 in
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 21 May 11:55 am EDT
Extended Forecast for

Leonardtown MD

  • This Afternoon

    This Afternoon: Scattered showers, mainly before 2pm. Cloudy, with a high near 71. Northeast wind around 14 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    High: 71 °F

    Scattered
    Showers

  • Tonight

    Tonight: Showers and thunderstorms likely. Patchy fog after 3am. Otherwise, cloudy, with a low around 54. Northeast wind 10 to 14 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 54 °F

    Showers
    Likely and
    Patchy Fog

  • Friday

    Friday: Showers, mainly after 8am. Patchy fog between 7am and 8am. High near 62. Northeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 62 °F

    Showers and
    Patchy Fog

  • Friday Night

    Friday Night: Showers. Low around 51. Northeast wind 9 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 51 °F

    Showers

  • Saturday

    Saturday: Showers, with thunderstorms also possible after 5pm. High near 66. East wind 10 to 14 mph, with gusts as high as 18 mph. Chance of precipitation is 80%.

    High: 66 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 58. Chance of precipitation is 90%.

    Low: 58 °F

    Showers

  • Sunday

    Sunday: A chance of showers. Mostly cloudy, with a high near 76. Chance of precipitation is 40%.

    High: 76 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers. Mostly cloudy, with a low around 62. Chance of precipitation is 30%.

    Low: 62 °F

    Chance
    Showers

  • Memorial Day

    Memorial Day: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 80. Chance of precipitation is 60%.

    High: 80 °F

    Chance
    Showers then
    Showers
    Likely

Detailed Forecast

This Afternoon
Scattered showers, mainly before 2pm. Cloudy, with a high near 71. Northeast wind around 14 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Tonight
Showers and thunderstorms likely. Patchy fog after 3am. Otherwise, cloudy, with a low around 54. Northeast wind 10 to 14 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
Showers, mainly after 8am. Patchy fog between 7am and 8am. High near 62. Northeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
Showers. Low around 51. Northeast wind 9 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Showers, with thunderstorms also possible after 5pm. High near 66. East wind 10 to 14 mph, with gusts as high as 18 mph. Chance of precipitation is 80%.
Saturday Night
Showers and possibly a thunderstorm. Low around 58. Chance of precipitation is 90%.
Sunday
A chance of showers. Mostly cloudy, with a high near 76. Chance of precipitation is 40%.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 62. Chance of precipitation is 30%.
Memorial Day
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 80. Chance of precipitation is 60%.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 64. Chance of precipitation is 60%.
Tuesday
Showers likely. Mostly cloudy, with a high near 79. Chance of precipitation is 60%.
Tuesday Night
Showers likely. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.
Wednesday
Partly sunny, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Leonardtown MD
 38.31°N 76.64°W (Elev. 98 ft)
Last Update:
10:53 am EDT May 21, 2026
Forecast Valid:
12pm EDT May 21, 2026-6pm EDT May 27, 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