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.

A Few Clouds and Windy

77°F

25°C

Humidity	80%
Wind Speed	W 28 G 40 mph
Barometer	29.98 in
Dewpoint	70°F (21°C)
Visibility	NA
Heat Index	79°F (26°C)
Last update	4 Jul 8:55 pm EDT

More Information:

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

Extended Forecast for

2 Miles SSW Port Republic MD

Severe T-storm Watch July 4, 09:20pm until July 4, 10:00pm

Click here for hazard details and duration

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Severe T-storm Watch July 4, 09:20pm until July 4, 10:00pm
NOW until 10:00pm Sat
Severe T-storm Watch
Tonight
Low: 76 °F
Severe
Thunderstorms
then Slight
Chance
Showers
Sunday
High: 96 °F
Sunny
Sunday Night
Low: 74 °F
Chance
T-storms then
Slight Chance
T-storms
Monday
High: 90 °F
Showers
Likely then
Showers
Monday Night
Low: 71 °F
Showers
Tuesday
High: 86 °F
Chance
Showers then
Chance
T-storms
Tuesday Night
Low: 69 °F
Chance
T-storms
Wednesday
High: 86 °F
Mostly Sunny

Detailed Forecast

Tonight

Scattered showers and thunderstorms 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 76. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 50%.

Sunday

Sunny, with a high near 96. Heat index values as high as 104. Calm wind becoming southeast 5 to 7 mph in the afternoon.

Sunday Night

A chance of showers and thunderstorms before 3am, then a slight chance of showers after 5am. Increasing clouds, with a low around 74. South wind 5 to 8 mph becoming northeast in the evening. Chance of precipitation is 50%.

Monday

Showers likely, then showers and possibly a thunderstorm after 11am. High near 90. East wind 3 to 6 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Monday Night

Showers and possibly a thunderstorm before 2am, then a chance of showers and thunderstorms after 2am. Low around 71. East wind around 5 mph becoming light and variable in the evening. Chance of precipitation is 80%.

Tuesday

A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 86. Chance of precipitation is 40%.

Tuesday Night

A chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 69. Chance of precipitation is 30%.

Wednesday

Mostly sunny, with a high near 86.

Wednesday Night

Partly cloudy, with a low around 71.

Thursday

A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91. Chance of precipitation is 20%.

Thursday Night

A chance of showers and thunderstorms. Partly cloudy, with a low around 75. Chance of precipitation is 30%.