National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Significant Heat in the Northwest U.S.; Tropical Rainfall Potential in the Southwest U.S.

A significant late season heat wave continues in the interior Pacific Northwest for at least one more day before easing somewhat Friday into Saturday. A combination of monsoonal moisture and tropical moisture ahead of tropical cyclone Lorena will bring a marginal to slight risk of excessive rainfall across the southwest U.S. through Saturday which may bring areas of flooding. Read More >

Hazardous Weather Conditions

Current conditions at

Patuxent River, Naval Air Station (KNHK)

Lat: 38.28°NLon: 76.41°WElev: 39ft.

Mostly Cloudy

72°F

22°C

Humidity 84%
Wind Speed S 12 G 17 mph
Barometer 29.80 in (1000.9 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 4 Sep 6:52 pm EDT
Extended Forecast for

Port Republic MD

Coastal Flood Advisory September 4, 10:00pm until September 5, 04:00am
Click here for hazard details and duration
Coastal Flood Advisory

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly before 9pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 66. South wind 7 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.

    Low: 66 °F

    Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 87. Southwest wind 6 to 8 mph.

    High: 87 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 72. South wind around 9 mph.

    Low: 72 °F

    Mostly Clear

  • Saturday

    Saturday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 89. South wind 7 to 10 mph. Chance of precipitation is 50%.

    High: 89 °F

    Sunny then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 62. South wind 6 to 9 mph becoming northwest after midnight. Chance of precipitation is 60%.

    Low: 62 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers, mainly before 8am. Mostly cloudy, with a high near 74. Chance of precipitation is 30%.

    High: 74 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

Detailed Forecast

Tonight
A chance of showers and thunderstorms, mainly before 9pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 66. South wind 7 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.
Friday
Sunny, with a high near 87. Southwest wind 6 to 8 mph.
Friday Night
Mostly clear, with a low around 72. South wind around 9 mph.
Saturday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 89. South wind 7 to 10 mph. Chance of precipitation is 50%.
Saturday Night
A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 62. South wind 6 to 9 mph becoming northwest after midnight. Chance of precipitation is 60%.
Sunday
A chance of showers, mainly before 8am. Mostly cloudy, with a high near 74. Chance of precipitation is 30%.
Sunday Night
Partly cloudy, with a low around 59.
Monday
Sunny, with a high near 74.
Monday Night
Mostly clear, with a low around 59.
Tuesday
Sunny, with a high near 76.
Tuesday Night
Partly cloudy, with a low around 59.
Wednesday
Mostly sunny, with a high near 75.
Wednesday Night
Partly cloudy, with a low around 59.
Thursday
Mostly sunny, with a high near 77.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Port Republic MD
 38.5°N 76.52°W (Elev. 98 ft)
Last Update:
7:30 pm EDT Sep 4, 2025
Forecast Valid:
7pm EDT Sep 4, 2025-6pm EDT Sep 11, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation