Severe Thunderstorms and Heavy Rainfall Across the Midwest into the Great Lakes Region; Significant Heat in the Southwest

Strong to severe storms may produce damaging winds, isolated hail, and a few tornadoes from the Midwest into the lower Great Lakes. These storms may also produce areas of heavy rain and flash flooding. Significant heat will continue across parts of the Desert Southwest into western Texas and north Alaska. Dangerous heat will also build into the Eastern and Central U.S. and continue into next week. 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

85°F

29°C

Humidity	77%
Wind Speed	S 3 mph
Barometer	29.90 in (1013.3 mb)
Dewpoint	77°F (25°C)
Visibility	8.00 mi
Heat Index	96°F (36°C)
Last update	18 Jun 4:56 pm EDT

More Information:

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

Extended Forecast for

Olney MD

This Afternoon
High: 87 °F
Severe
Thunderstorms
Tonight
Low: 71 °F
Partly Cloudy
Juneteenth
High: 90 °F
Sunny then
Heavy Rain
Thursday Night
Low: 64 °F
T-storms
Likely then
Slight Chance
Showers
Friday
High: 83 °F
Sunny
Friday Night
Low: 65 °F
Partly Cloudy
Saturday
High: 89 °F
Sunny
Saturday Night
Low: 70 °F
Partly Cloudy
Sunday
High: 93 °F
Mostly Sunny

Detailed Forecast

This Afternoon

Scattered showers and thunderstorms. Some of the storms could be severe. Partly sunny, with a high near 87. West wind around 8 mph. Chance of precipitation is 50%.

Tonight

Partly cloudy, with a low around 71. Southwest wind around 5 mph becoming calm in the evening.

Juneteenth

A slight chance of showers, then showers and thunderstorms likely after 2pm. Some of the storms could produce heavy rainfall. Sunny, with a high near 90. Southwest wind 6 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Thursday Night

Showers and thunderstorms likely before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, then gradually becoming mostly clear, with a low around 64. Southwest wind 7 to 9 mph. 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 83. Northwest wind around 9 mph.

Friday Night

Partly cloudy, with a low around 65.

Saturday

Sunny, with a high near 89.

Saturday Night

Partly cloudy, with a low around 70.

Sunday

Mostly sunny, with a high near 93.

Sunday Night

Mostly clear, with a low around 74.