Severe Thunderstorms and Flooding from the Southern Plains to the Great Lakes; Record Heat in the East

Widely scattered severe thunderstorms may produce damaging winds, hail, and flash flooding from the southern Plains into the lower Great Lakes. Elevated to locally critical fire weather conditions will persist across portions of the Southwest and Southern High Plains due to gusty winds and dry conditions. An early-season heatwave will challenge temperature records across the eastern U.S.. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

A Few Clouds

91°F

33°C

Humidity	39%
Wind Speed	SW 7 mph
Barometer	30.08 in (1019.4 mb)
Dewpoint	63°F (17°C)
Visibility	10.00 mi
Heat Index	92°F (33°C)
Last update	19 May 5:56 pm EDT

More Information:

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

Extended Forecast for

Dayton MD

Tonight
Low: 71 °F
Showers
Likely then
Partly Cloudy
Wednesday
High: 92 °F
Sunny then
T-storms
Likely
Wednesday Night
Low: 55 °F
T-storms
Likely then
Chance
Showers
Thursday
High: 64 °F
Showers
Likely
Thursday Night
Low: 50 °F
Chance
Showers
Friday
High: 62 °F
Showers
Friday Night
Low: 49 °F
Showers
Saturday
High: 64 °F
Showers
Saturday Night
Low: 55 °F
Showers
Likely

Detailed Forecast

Tonight

Showers likely and possibly a thunderstorm before 7pm, then scattered showers and thunderstorms between 7pm and 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 71. Southwest wind 5 to 8 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Wednesday

A chance of showers and thunderstorms before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then showers and thunderstorms likely after 5pm. Increasing clouds, with a high near 92. West wind 6 to 13 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday Night

Showers and thunderstorms likely before 2am, then a chance of showers between 2am and 4am. Cloudy, with a low around 55. North wind 6 to 8 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday

A chance of showers before 8am, then showers likely and possibly a thunderstorm between 8am and 2pm, then a chance of showers after 2pm. Cloudy, with a high near 64. Northeast wind 9 to 13 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday Night

A chance of showers, mainly after 2am. Mostly cloudy, with a low around 50. Northeast wind 5 to 7 mph. Chance of precipitation is 50%.

Friday

Showers likely, then showers and possibly a thunderstorm after 2pm. High near 62. Chance of precipitation is 80%.

Friday Night

Showers. Low around 49. Chance of precipitation is 80%.

Saturday

Showers. High near 64. Chance of precipitation is 80%.

Saturday Night

Showers likely, mainly before 2am. Mostly cloudy, with a low around 55. Chance of precipitation is 60%.

Sunday

A chance of showers. Mostly cloudy, with a high near 73. Chance of precipitation is 50%.