Record High Temperatures Likely Across the Mid-Atlantic; Excessive Rainfall in the Upper Midwest, Southern New England and Southwest

An intense heat wave will continue across the Midwest/Ohio Valley into the Mid-Atlantic, where record high temperatures are likely. Heat will also build across the West this weekend. Severe thunderstorms and flash flooding are possible across the Upper Midwest into the Great Lakes and southern New England. Monsoon-like conditions may produce isolated flash flooding in the Four Corners region. Read More >

Hazardous Weather Conditions

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

98°F

37°C

Humidity	42%
Wind Speed	SW 6 mph
Barometer	29.96 in (1015.0 mb)
Dewpoint	71°F (22°C)
Visibility	10.00 mi
Heat Index	106°F (41°C)
Last update	22 Jun 4:56 pm EDT

More Information:

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

Extended Forecast for

2 Miles E Wheaton-Glenmont MD

Heat Advisory June 23, 11:00am until June 23, 07:00pm

Heat Advisory June 22, 04:59pm until June 22, 08:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory June 22, 04:59pm until June 22, 08:00pm
NOW until 8:00pm Sat
Heat Advisory
This Afternoon
High: 99 °F
Isolated
T-storms
Tonight
Low: 78 °F
Partly Cloudy
Sunday
High: 98 °F
Sunny then
Chance
T-storms
Sunday Night
Low: 73 °F
Showers
Likely
Monday
High: 89 °F
Chance
Showers
Monday Night
Low: 66 °F
Mostly Clear
Tuesday
High: 90 °F
Sunny
Tuesday Night
Low: 71 °F
Mostly Clear

Detailed Forecast

This Afternoon

Isolated showers and thunderstorms. Mostly sunny and hot, with a high near 99. Heat index values as high as 105. South wind around 6 mph. Chance of precipitation is 20%.

Tonight

Partly cloudy, with a low around 78. South wind 5 to 8 mph.

Sunday

A chance of showers and thunderstorms after 2pm. Increasing clouds and hot, with a high near 98. Heat index values as high as 104. Southwest wind 10 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

Sunday Night

A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 73. Southwest wind around 9 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Monday

A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 2pm, then a slight chance of showers and thunderstorms after 2pm. Sunny, with a high near 89. Northwest wind 7 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

Monday Night

Mostly clear, with a low around 66.

Tuesday

Sunny, with a high near 90.

Tuesday Night

Mostly clear, with a low around 71.

Wednesday

A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 97. Chance of precipitation is 30%.

Wednesday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Chance of precipitation is 50%.

Thursday

A chance of showers and thunderstorms. Partly sunny, with a high near 89. Chance of precipitation is 30%.