Excessive Rainfall and Tropical Storm in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce considerable, potentially life-threatening, flooding across the lower Mississippi River Valley and central Great Lakes region through tonight. Tropical Storm Arthur will move northeastward along the Texas coast today and then move inland over southwestern Louisiana by tonight. An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana. Read More >

Current conditions at

St Marys County Airport (K2W6)

Lat: 38.32°NLon: 76.55°WElev: 144ft.

Partly Cloudy

80°F

27°C

Humidity 65%
Wind Speed Vrbl 6 mph
Barometer 29.82 in
Dewpoint 68°F (20°C)
Visibility NA
Heat Index82°F (28°C)
Last update 17 Jun 11:35 am EDT
Extended Forecast for

Chaptico MD

  • Today

    Today: Sunny, with a high near 87. Southwest wind 3 to 7 mph.

    High: 87 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 72. South wind 6 to 9 mph, with gusts as high as 18 mph.

    Low: 72 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers and thunderstorms between 2pm and 3pm.  Mostly sunny, with a high near 95. Heat index values as high as 103. Southwest wind 14 to 18 mph, with gusts as high as 26 mph.  Chance of precipitation is 20%.

    High: 95 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 70. Southwest wind 5 to 9 mph.  Chance of precipitation is 50%.

    Low: 70 °F

    Chance
    T-storms then
    Chance
    Showers

  • Juneteenth

    Juneteenth: A chance of showers, mainly before 2pm.  Partly sunny, with a high near 85. Northwest wind 3 to 8 mph.  Chance of precipitation is 50%.

    High: 85 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 62.

    Low: 62 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 87. Southwest wind 3 to 7 mph.
Tonight
Partly cloudy, with a low around 72. South wind 6 to 9 mph, with gusts as high as 18 mph.
Thursday
A slight chance of showers and thunderstorms between 2pm and 3pm. Mostly sunny, with a high near 95. Heat index values as high as 103. Southwest wind 14 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Southwest wind 5 to 9 mph. Chance of precipitation is 50%.
Juneteenth
A chance of showers, mainly before 2pm. Partly sunny, with a high near 85. Northwest wind 3 to 8 mph. Chance of precipitation is 50%.
Friday Night
Mostly clear, with a low around 64.
Saturday
Sunny, with a high near 84.
Saturday Night
Clear, with a low around 62.
Sunday
Sunny, with a high near 87.
Sunday Night
A slight chance of showers and thunderstorms, then a chance of showers after 2am. Partly cloudy, with a low around 67. Chance of precipitation is 30%.
Monday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 87. Chance of precipitation is 60%.
Monday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 85. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
Chaptico MD
 38.37°N 76.77°W (Elev. 95 ft)
10:53 am EDT Jun 17, 2026
11am EDT Jun 17, 2026-6pm EDT Jun 23, 2026
 
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