Record High Temperatures Likely Across the Mid-Atlantic; Severe Weather in the Upper Midwest and Southwest

An intense heat wave will peak across the Mid-Atlantic and I-95 Urban Corridor this weekend. Record high temperatures are likely with widespread heat indices exceeding 100 degrees. In the Midwest, severe storms capable of producing strong winds, hail, a few tornadoes and heavy rain will be possible Saturday. Additionally, strong storms will also be possible Saturday in the Four Corners region. Read More >

Hazardous Weather Conditions

Heat Advisory in effect from June 22, 11:00 AM EDT until June 22, 08:00 PM EDT

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

80°F

27°C

Humidity	67%
Wind Speed	S 3 mph
Barometer	30.13 in (1020.9 mb)
Dewpoint	68°F (20°C)
Visibility	10.00 mi
Heat Index	83°F (28°C)
Last update	22 Jun 12:56 am EDT

More Information:

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

Extended Forecast for

2 Miles S Dayton MD

Heat Advisory June 22, 11:00am until June 22, 08:00pm

Click here for hazard details and duration

Heat Advisory

Overnight
Low: 72 °F
Mostly Clear
Saturday
High: 100 °F
Hot
Saturday Night
Low: 77 °F
Partly Cloudy
Sunday
High: 96 °F
Mostly Sunny
then Chance
T-storms
Sunday Night
Low: 73 °F
Showers
Likely
Monday
High: 90 °F
Chance
Showers
Monday Night
Low: 68 °F
Chance
Showers then
Mostly Clear
Tuesday
High: 90 °F
Sunny
Tuesday Night
Low: 70 °F
Partly Cloudy

Detailed Forecast

Overnight

Mostly clear, with a low around 72. Light south wind.

Saturday

Sunny and hot, with a high near 100. Heat index values as high as 107. Southwest wind 3 to 7 mph.

Saturday Night

Partly cloudy, with a low around 77. South wind around 6 mph.

Sunday

A chance of showers and thunderstorms after 2pm. Increasing clouds, with a high near 96. Heat index values as high as 103. Southwest wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

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 6 to 8 mph. Chance of precipitation is 60%.

Monday

A chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 90. Chance of precipitation is 30%.

Monday Night

A chance of showers before 8pm. Mostly clear, with a low around 68. Chance of precipitation is 30%.

Tuesday

Sunny, with a high near 90.

Tuesday Night

Partly cloudy, with a low around 70.

Wednesday

A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 96. Chance of precipitation is 30%.

Wednesday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Chance of precipitation is 50%.