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

Excessive Rainfall and Significant Flooding in the Upper Midwest This Weekend

Heavy to excessive rainfall is expected over the weekend across eastern Iowa, northern Missouri, northwest Illinois and southern Wisconsin. Numerous flash floods, some with significant impacts, are expected in these areas. Heaviest rainfall will occur overnight Saturday and Sunday, so be sure to have multiple ways to receive warnings. Read More >

Current conditions at

Patuxent River, Naval Air Station (KNHK)

Lat: 38.28°NLon: 76.41°WElev: 39ft.

A Few Clouds

78°F

26°C

Humidity 45%
Wind Speed N 8 mph
Barometer 30.23 in (1023.5 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 9 Aug 1:52 pm EDT
Extended Forecast for

Port Republic MD

  • This Afternoon

    This Afternoon: Sunny, with a high near 81. Northeast wind around 6 mph.

    High: 81 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 63. Calm wind.

    Low: 63 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 83. Calm wind.

    High: 83 °F

    Sunny

  • Sunday Night

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

    Low: 64 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 84. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 84 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 72.

    Low: 72 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 81. Northeast wind around 6 mph.
Tonight
Clear, with a low around 63. Calm wind.
Sunday
Sunny, with a high near 83. Calm wind.
Sunday Night
Mostly clear, with a low around 64. Light southeast wind.
Monday
Sunny, with a high near 84. Calm wind becoming southeast around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 68.
Tuesday
Sunny, with a high near 88.
Tuesday Night
Mostly clear, with a low around 72.
Wednesday
Mostly sunny, with a high near 91.
Wednesday Night
Partly cloudy, with a low around 72.
Thursday
A chance of showers. Mostly sunny, with a high near 90. Chance of precipitation is 30%.
Thursday Night
A chance of showers. Partly cloudy, with a low around 73. Chance of precipitation is 30%.
Friday
A chance of showers. Mostly sunny, with a high near 88. Chance of precipitation is 30%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Port Republic MD
 38.5°N 76.55°W (Elev. 148 ft)
Last Update:
1:30 pm EDT Aug 9, 2025
Forecast Valid:
2pm EDT Aug 9, 2025-6pm EDT Aug 15, 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