Heat Wave and Severe Thunderstorms this Independence Day

A prolonged, dangerous heat wave will persist through the Independence Day weekend across the Ohio Valley, Midwest, and Mid-Atlantic. Numerous temperature records are expected. Clusters of severe thunderstorms will move across parts of the Allegheny Plateau into Mid Atlantic this Independence Day, with potential for widespread damaging winds. Additional severe thunderstorms in the Great Plains. Read More >

Hazardous Weather Conditions

Current conditions at

St Marys County Airport (K2W6)

Lat: 38.32°NLon: 76.55°WElev: 144ft.

Fair

99°F

37°C

Humidity	37%
Wind Speed	Vrbl 5 mph
Barometer	29.92 in
Dewpoint	69°F (21°C)
Visibility	NA
Heat Index	105°F (41°C)
Last update	4 Jul 3:15 pm EDT

More Information:

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

Extended Forecast for

2 Miles WNW Dowell MD

Severe T-storm Watch until July 4, 10:00pm

Extreme Heat Warning until July 4, 09:00pm

Click here for hazard details and duration

Severe T-storm Watch

Extreme Heat Warning

Severe T-storm Watch until July 4, 10:00pm
Extreme Heat Warning until July 4, 09:00pm
NOW: Multiple hazards in effect
Click HERE for Details
Independence Day
High: 102 °F
Severe
Thunderstorms
Tonight
Low: 77 °F
Severe
Thunderstorms
then Slight
Chance
Showers
Sunday
High: 94 °F
Sunny
Sunday Night
Low: 75 °F
Chance
T-storms
Monday
High: 91 °F
Showers
Monday Night
Low: 72 °F
Showers
Tuesday
High: 88 °F
Showers
Likely then
Chance
T-storms
Tuesday Night
Low: 71 °F
Chance
T-storms

Detailed Forecast

Independence Day

Scattered showers and thunderstorms, mainly after 5pm. Some of the storms could be severe. Mostly sunny and hot, with a high near 102. Heat index values as high as 115. Southeast wind around 6 mph. Chance of precipitation is 30%.

Tonight

Showers and thunderstorms likely before midnight, then a slight chance of showers between midnight and 3am. Some of the storms could be severe. Mostly cloudy, with a low around 77. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Sunday

Sunny, with a high near 94. Heat index values as high as 105. Calm wind becoming southeast 5 to 8 mph in the afternoon.

Sunday Night

A chance of showers and thunderstorms, mainly before midnight. Increasing clouds, with a low around 75. South wind 5 to 8 mph becoming light and variable after midnight. Chance of precipitation is 40%.

Monday

Showers likely, then showers and possibly a thunderstorm after 11am. High near 91. East wind 3 to 7 mph. Chance of precipitation is 80%.

Monday Night

Showers and possibly a thunderstorm. Low around 72. Chance of precipitation is 80%.

Tuesday

Showers likely, with thunderstorms also possible after 2pm. Partly sunny, with a high near 88. Chance of precipitation is 60%.

Tuesday Night

A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 71. Chance of precipitation is 30%.

Wednesday

Mostly sunny, with a high near 85.

Wednesday Night

Partly cloudy, with a low around 73.