Severe Weather and Heavy Rain from the Great Lakes to the Mid-Atlantic; Heat Persists in the East

Widespread strong thunderstorms with damaging winds and locally heavy rain are expected from the Upper Ohio Valley into the southern Mid-Atlantic today and portions of the central Appalachians and Carolinas on Saturday. Monsoonal moisture will bring a flash flooding threat to the Desert Southwest. Sweltering heat persists from the Plains to the southern Mid-Atlantic through tonight. Read More >

Hazardous Weather Conditions

Current conditions at

St Marys County Airport (K2W6)

Lat: 38.32°NLon: 76.55°WElev: 144ft.

Fair

85°F

29°C

Humidity 73%
Wind Speed W 6 mph
Barometer 29.96 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index94°F (34°C)
Last update 4 Sep 11:35 am EDT
Extended Forecast for

Port Republic MD

  • Today

    Today: A chance of showers and thunderstorms after 5pm.  Mostly sunny, with a high near 92. Heat index values as high as 102. Northwest wind around 6 mph.  Chance of precipitation is 30%.

    High: 92 °F

    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly before 11pm.  Mostly cloudy, with a low around 72. Calm wind becoming west around 5 mph after midnight.  Chance of precipitation is 40%.

    Low: 72 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Saturday

    Saturday: A slight chance of showers between noon and 2pm.  Partly sunny, with a high near 82. North wind around 7 mph.  Chance of precipitation is 20%.

    High: 82 °F

    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, mainly between 7pm and 8pm.  Partly cloudy, with a low around 67. Light northeast wind.  Chance of precipitation is 30%.

    Low: 67 °F

    Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 80. Northeast wind 7 to 9 mph.

    High: 80 °F

    Sunny

  • Sunday Night

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

    Low: 64 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Monday Night

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

    Low: 64 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

Detailed Forecast

Today
A chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 92. Heat index values as high as 102. Northwest wind around 6 mph. Chance of precipitation is 30%.
Tonight
A chance of showers and thunderstorms, mainly before 11pm. Mostly cloudy, with a low around 72. Calm wind becoming west around 5 mph after midnight. Chance of precipitation is 40%.
Saturday
A slight chance of showers between noon and 2pm. Partly sunny, with a high near 82. North wind around 7 mph. Chance of precipitation is 20%.
Saturday Night
A chance of showers and thunderstorms, mainly between 7pm and 8pm. Partly cloudy, with a low around 67. Light northeast wind. Chance of precipitation is 30%.
Sunday
Sunny, with a high near 80. Northeast wind 7 to 9 mph.
Sunday Night
Mostly clear, with a low around 64.
Labor Day
Sunny, with a high near 79.
Monday Night
Mostly clear, with a low around 64.
Tuesday
Mostly sunny, with a high near 83.
Tuesday Night
Partly cloudy, with a low around 66.
Wednesday
Mostly sunny, with a high near 86.
Wednesday Night
Partly cloudy, with a low around 72.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 91. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
Port Republic MD
 38.48°N 76.55°W (Elev. 98 ft)
10:53 am EDT Sep 4, 2026
11am EDT Sep 4, 2026-6pm EDT Sep 10, 2026
 
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Additional Resources

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