Hot Temperatures in the Northwest U.S.; Tropical Rainfall Potential in the Southwest U.S.

Hot to extremely hot temperatures are in place again Thursday across the interior northwest U.S. 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

Hazardous Weather Outlook

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

61°F

16°C

Humidity	NA
Wind Speed	SE 3 mph
Barometer	29.88 in (1012.7 mb)
Dewpoint	N/A
Visibility	10.00 mi
Last update	4 Sep 6:56 am EDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

3 Miles W North Potomac MD

Today
High: 85 °F
Sunny then
Showers
Likely
Tonight
Low: 62 °F
Showers
Likely then
Partly Cloudy
Friday
High: 87 °F
Sunny
Friday Night
Low: 67 °F
Mostly Clear
Saturday
High: 86 °F
Mostly Sunny
then Showers
Likely
Saturday Night
Low: 58 °F
Showers
Likely
Sunday
High: 73 °F
Partly Sunny
Sunday Night
Low: 52 °F
Partly Cloudy
Monday
High: 72 °F
Sunny

Detailed Forecast

Today

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Increasing clouds, with a high near 85. South wind 6 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tonight

Showers and thunderstorms likely, mainly before 10pm. Mostly cloudy, with a low around 62. Southwest wind 5 to 7 mph becoming calm after midnight. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday

Sunny, with a high near 87. Calm wind becoming southwest 5 to 9 mph in the morning.

Friday Night

Mostly clear, with a low around 67. South wind around 6 mph.

Saturday

Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 86. Light south wind becoming southwest 5 to 9 mph in the morning. Chance of precipitation is 70%.

Saturday Night

Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 11pm, then a chance of showers after 11pm. Mostly cloudy, with a low around 58. Chance of precipitation is 60%.

Sunday

Partly sunny, with a high near 73.

Sunday Night

Partly cloudy, with a low around 52.

Monday

Sunny, with a high near 72.

Monday Night

Mostly clear, with a low around 50.

Tuesday

Sunny, with a high near 75.

Tuesday Night

Partly cloudy, with a low around 52.