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.

Mostly Cloudy

84°F

29°C

Humidity	49%
Wind Speed	S 10 mph
Barometer	29.79 in
Dewpoint	63°F (17°C)
Visibility	NA
Heat Index	85°F (29°C)
Last update	17 Jun 3:15 pm EDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Mechanicsville MD

Tonight
Low: 71 °F
Partly Cloudy
Thursday
High: 95 °F
Partly Sunny
then Chance
T-storms
Thursday Night
Low: 69 °F
Chance
T-storms then
Chance
Showers
Juneteenth
High: 84 °F
Slight Chance
T-storms then
Slight Chance
Showers
Friday Night
Low: 63 °F
Mostly Clear
Saturday
High: 85 °F
Sunny
Saturday Night
Low: 63 °F
Mostly Clear
Sunday
High: 86 °F
Sunny
Sunday Night
Low: 67 °F
Partly Cloudy
then Chance
Showers

Detailed Forecast

Tonight

Partly cloudy, with a low around 71. South wind 8 to 10 mph, with gusts as high as 20 mph.

Thursday

A chance of showers and thunderstorms, mainly after 3pm. Partly sunny, with a high near 95. Southwest wind 14 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.

Thursday Night

A chance of showers and thunderstorms before 1am, then a slight chance of showers between 1am and 2am, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 69. West wind 5 to 9 mph. Chance of precipitation is 50%.

Juneteenth

A slight chance of showers and thunderstorms before 8am, then a slight chance of showers between 8am and 2pm. Mostly cloudy, then gradually becoming sunny, with a high near 84. Light west wind becoming northwest 5 to 9 mph in the morning. Chance of precipitation is 20%.

Friday Night

Mostly clear, with a low around 63. Northwest wind around 6 mph.

Saturday

Sunny, with a high near 85.

Saturday Night

Mostly clear, with a low around 63.

Sunday

Sunny, with a high near 86.

Sunday Night

A chance of showers after 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 40%.

Monday

A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 87. Chance of precipitation is 80%.