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

Hazardous Weather Outlook

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Light Rain

80°F

27°C

Humidity	64%
Wind Speed	S 18 G 28 mph
Barometer	29.80 in (1009.9 mb)
Dewpoint	67°F (19°C)
Visibility	10.00 mi
Heat Index	82°F (28°C)
Last update	4 Sep 2:56 pm EDT

More Information:

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

Extended Forecast for

3 Miles SSE Boyds MD

This Afternoon
High: 85 °F
Showers
Likely
Tonight
Low: 61 °F
Showers
Likely then
Partly Cloudy
Friday
High: 87 °F
Patchy Fog
then Sunny
Friday Night
Low: 68 °F
Mostly Clear
Saturday
High: 87 °F
Mostly Sunny
then Showers
Saturday Night
Low: 58 °F
Showers
Sunday
High: 74 °F
Chance
Showers then
Mostly Sunny
Sunday Night
Low: 52 °F
Partly Cloudy
Monday
High: 73 °F
Sunny

Detailed Forecast

This Afternoon

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Partly sunny, with a high near 85. South wind around 13 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight

Showers and thunderstorms likely, mainly before 10pm. Mostly cloudy, with a low around 61. Southwest wind 5 to 7 mph becoming calm after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Friday

Patchy fog between 7am and 8am. Otherwise, mostly sunny, with a high near 87. Calm wind becoming southwest 5 to 9 mph in the afternoon.

Friday Night

Mostly clear, with a low around 68. South wind around 6 mph.

Saturday

Showers and possibly a thunderstorm after 2pm. High near 87. Calm wind becoming southwest 5 to 8 mph in the morning. Chance of precipitation is 80%.

Saturday Night

Showers and possibly a thunderstorm before 11pm, then showers likely. Low around 58. Chance of precipitation is 80%.

Sunday

A chance of showers before 8am. Partly sunny, with a high near 74. Chance of precipitation is 30%.

Sunday Night

Partly cloudy, with a low around 52.