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

Tropical Storm Isaias to Impact the Eastern U.S. Early This Week

Tropical Storm Isaias will deliver heavy rainfall, flash and urban flooding, high winds, dangerous storm surge, coastal flooding, life-threatening surf, rip currents, and severe thunderstorms with tornadoes to portions of the Eastern U.S. through early this week. Isaias is expected to track from just offshore of northeastern Florida toward coastal South and North Carolina on Monday. Read More >

Hazardous Weather Conditions

Current conditions at

Patuxent River, Naval Air Station (KNHK)

Lat: 38.28°NLon: 76.41°WElev: 39ft.

Partly Cloudy

77°F

25°C

Humidity 94%
Wind Speed S 7 mph
Barometer 30.02 in (1016.4 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 3 Aug 5:52 am EDT
Extended Forecast for

Mechanicsville MD

Tropical Storm Warning until further notice
Flash Flood Watch August 3, 11:00pm until August 4, 11:00pm
Coastal Flood Watch August 4, 06:00am until August 5, 12:00am
Click here for hazard details and duration
Tropical Storm Warning until further notice
Flash Flood Watch
Coastal Flood Watch
  •  
    Tropical Storm Warning until further notice

    NOW until further notice

    Tropical Storm Warning

  • Overnight

    Overnight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Light west wind. Chance of precipitation is 30%.

    Chance
    Showers

    Low: 72 °F

  • Monday

    Monday: A slight chance of showers before noon, then a chance of showers and thunderstorms between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm. Mostly cloudy, with a high near 88. South wind 3 to 6 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Slight Chance
    Showers then
    Showers
    Likely

    High: 88 °F

  • Monday
    Night

    Monday Night: Tropical storm conditions possible. Showers and thunderstorms likely, then showers and possibly a thunderstorm after midnight. Some of the storms could produce heavy rain. Low around 69. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

    Tropical
    Storm
    Conditions
    Possible

    Low: 69 °F

  • Tuesday

    Tuesday: Tropical storm conditions possible. Showers and possibly a thunderstorm. Some of the storms could produce heavy rain. High near 81. Chance of precipitation is 90%. New rainfall amounts between 3 and 4 inches possible.

    Tropical
    Storm
    Conditions
    Possible

    High: 81 °F

  • Tuesday
    Night

    Tuesday Night: A chance of showers and thunderstorms before midnight, then a slight chance of showers. Some of the storms could produce heavy rain. Mostly cloudy, with a low around 69. Southwest wind 5 to 9 mph. Chance of precipitation is 40%.

    Heavy Rain

    Low: 69 °F

  • Wednesday

    Wednesday: A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 86. Chance of precipitation is 30%.

    Mostly Sunny
    then Chance
    Showers

    High: 86 °F

  • Wednesday
    Night

    Wednesday Night: A chance of showers. Partly cloudy, with a low around 69. Chance of precipitation is 50%.

    Chance
    Showers

    Low: 69 °F

  • Thursday

    Thursday: A chance of showers and thunderstorms. Mostly sunny, with a high near 84. Chance of precipitation is 40%.

    Chance
    T-storms

    High: 84 °F

Detailed Forecast

Overnight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Light west wind. Chance of precipitation is 30%.
Monday
A slight chance of showers before noon, then a chance of showers and thunderstorms between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm. Mostly cloudy, with a high near 88. South wind 3 to 6 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Tropical storm conditions possible. Showers and thunderstorms likely, then showers and possibly a thunderstorm after midnight. Some of the storms could produce heavy rain. Low around 69. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Tuesday
Tropical storm conditions possible. Showers and possibly a thunderstorm. Some of the storms could produce heavy rain. High near 81. Chance of precipitation is 90%. New rainfall amounts between 3 and 4 inches possible.
Tuesday Night
A chance of showers and thunderstorms before midnight, then a slight chance of showers. Some of the storms could produce heavy rain. Mostly cloudy, with a low around 69. Southwest wind 5 to 9 mph. Chance of precipitation is 40%.
Wednesday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 86. Chance of precipitation is 30%.
Wednesday Night
A chance of showers. Partly cloudy, with a low around 69. Chance of precipitation is 50%.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 84. Chance of precipitation is 40%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Chance of precipitation is 50%.
Friday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 85. Chance of precipitation is 60%.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 69. Chance of precipitation is 30%.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 40%.
Saturday Night
Partly cloudy, with a low around 69.
Sunday
A chance of showers. Mostly sunny, with a high near 87. Chance of precipitation is 30%.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
Mechanicsville MD
 38.43°N 76.73°W (Elev. 148 ft)
Last Update:
4:40 am EDT Aug 3, 2020
Forecast Valid:
5am EDT Aug 3, 2020-6pm EDT Aug 9, 2020
 
Forecast Discussion
 
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Additional Resources

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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