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

Washington/Reagan National Airport, DC (KDCA)

Lat: 38.85°NLon: 77.03°WElev: 13ft.

Mostly Cloudy

26°C

79°F

Humidity 58%
Wind Speed NW 11 km/h
Barometer 1017.7 mb (30.06 in)
Dewpoint 17°C (63°F)
Visibility 16 km
Heat Index27°C (81°F)
Last update 3 Aug 7:52 am EDT
Extended Forecast for

Hillandale MD

Flash Flood Watch August 3, 11:00pm until August 4, 11:00pm
Click here for hazard details and duration
Flash Flood Watch

  • Today

    Today: A slight chance of showers, then showers and thunderstorms likely after noon. Some of the storms could produce gusty winds and heavy rain. Mostly cloudy, with a high near 31. West wind 5 to 10 km/h becoming south in the afternoon. Chance of precipitation is 60%. New rainfall amounts between 7.5 mm and 1 cm possible.

    Slight Chance
    Showers then
    Heavy Rain

    High: 31 °C

  • Tonight

    Tonight: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3am. Some of the storms could produce gusty winds and heavy rain. Low around 21. South wind 5 to 10 km/h becoming north after midnight. Chance of precipitation is 80%. New rainfall amounts between 2 and 3 cm possible.

    Heavy Rain

    Low: 21 °C

  • Tuesday

    Tuesday: Tropical storm conditions possible. Showers and possibly a thunderstorm. Some of the storms could produce heavy rain. High near 27. Chance of precipitation is 90%. New rainfall amounts in excess of 4 cm possible.

    Tropical
    Storm
    Conditions
    Possible

    High: 27 °C

  • Tuesday
    Night

    Tuesday Night: A chance of showers and thunderstorms before midnight. Some of the storms could produce heavy rain. Mostly cloudy, with a low around 21. Southwest wind 5 to 11 km/h. Chance of precipitation is 50%.

    Heavy Rain
    then Mostly
    Cloudy

    Low: 21 °C

  • Wednesday

    Wednesday: A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 29. Northwest wind 5 to 8 km/h. Chance of precipitation is 30%.

    Mostly Sunny
    then Chance
    Showers

    High: 29 °C

  • Wednesday
    Night

    Wednesday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 20. Chance of precipitation is 40%.

    Chance
    Showers

    Low: 20 °C

  • Thursday

    Thursday: A chance of showers and thunderstorms. Mostly sunny, with a high near 29. Chance of precipitation is 30%.

    Chance
    T-storms

    High: 29 °C

  • Thursday
    Night

    Thursday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 21. Chance of precipitation is 40%.

    Chance
    T-storms

    Low: 21 °C

  • Friday

    Friday: Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 29. Chance of precipitation is 60%.

    Showers
    Likely

    High: 29 °C

Detailed Forecast

Today
A slight chance of showers, then showers and thunderstorms likely after noon. Some of the storms could produce gusty winds and heavy rain. Mostly cloudy, with a high near 31. West wind 5 to 10 km/h becoming south in the afternoon. Chance of precipitation is 60%. New rainfall amounts between 7.5 mm and 1 cm possible.
Tonight
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3am. Some of the storms could produce gusty winds and heavy rain. Low around 21. South wind 5 to 10 km/h becoming north after midnight. Chance of precipitation is 80%. New rainfall amounts between 2 and 3 cm possible.
Tuesday
Tropical storm conditions possible. Showers and possibly a thunderstorm. Some of the storms could produce heavy rain. High near 27. Chance of precipitation is 90%. New rainfall amounts in excess of 4 cm possible.
Tuesday Night
A chance of showers and thunderstorms before midnight. Some of the storms could produce heavy rain. Mostly cloudy, with a low around 21. Southwest wind 5 to 11 km/h. Chance of precipitation is 50%.
Wednesday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 29. Northwest wind 5 to 8 km/h. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 20. Chance of precipitation is 40%.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 29. Chance of precipitation is 30%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 21. Chance of precipitation is 40%.
Friday
Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 29. Chance of precipitation is 60%.
Friday Night
Partly cloudy, with a low around 21.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 31. Chance of precipitation is 40%.
Saturday Night
Partly cloudy, with a low around 21.
Sunday
A chance of showers. Mostly sunny, with a high near 31. Chance of precipitation is 30%.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
Hillandale MD
 39.02°N 76.97°W (Elev. 86 m)
Last Update:
7:50 am EDT Aug 3, 2020
Forecast Valid:
8am EDT Aug 3, 2020-6pm EDT Aug 9, 2020
 
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