Heat Wave and Severe Thunderstorms this Independence Day

A prolonged, dangerous heat wave will persist through the Independence Day weekend across the Ohio Valley, Midwest, and Mid-Atlantic. Numerous temperature records are expected. Clusters of severe thunderstorms will move across parts of the Allegheny Plateau into Mid Atlantic this Independence Day, with potential for widespread damaging winds. Additional severe thunderstorms in the Great Plains. Read More >

Hazardous Weather Conditions

Current conditions at

Frederick Municipal Airport (KFDK)

Lat: 39.42°NLon: 77.37°WElev: 269ft.

Fair

97°F

36°C

Humidity	34%
Wind Speed	W 6 mph
Barometer	30.00 in
Dewpoint	64°F (18°C)
Visibility	10.00 mi
Heat Index	99°F (37°C)
Last update	4 Jul 11:47 am EDT

More Information:

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

Extended Forecast for

3 Miles NE Middletown MD

Extreme Heat Warning until July 4, 09:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning until July 4, 09:00pm
NOW until 9:00pm Sat
Extreme Heat Warning
Independence Day
High: 95 °F
Severe
Thunderstorms
Tonight
Low: 73 °F
Severe
Thunderstorms
then
Scattered
Showers
Sunday
High: 88 °F
Mostly Sunny
then Showers
Likely
Sunday Night
Low: 69 °F
Showers
Monday
High: 81 °F
Showers
Likely then
Showers
Monday Night
Low: 68 °F
Showers
Tuesday
High: 80 °F
Chance
Showers then
Chance
T-storms
Tuesday Night
Low: 67 °F
Chance
T-storms then
Chance
Showers

Detailed Forecast

Independence Day

Scattered showers and thunderstorms, mainly after 3pm. Some of the storms could be severe. Increasing clouds, with a high near 95. Heat index values as high as 105. West wind 6 to 8 mph. Chance of precipitation is 40%.

Tonight

Showers and thunderstorms likely, mainly before 7pm. Some of the storms could be severe. Mostly cloudy, with a low around 73. Southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Sunday

A chance of showers and thunderstorms between 3pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Increasing clouds, with a high near 88. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Sunday Night

Showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 5am, then showers likely after 5am. Low around 69. North wind around 6 mph becoming calm in the evening. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Monday

Showers likely before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 81. Southeast wind around 5 mph. Chance of precipitation is 90%.

Monday Night

Showers and possibly a thunderstorm. Low around 68. Chance of precipitation is 80%.

Tuesday

A chance of showers, with thunderstorms also possible after 11am. Partly sunny, with a high near 80. Chance of precipitation is 40%.

Tuesday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Chance of precipitation is 40%.

Wednesday

A chance of showers, mainly after 2pm. Partly sunny, with a high near 82. Chance of precipitation is 30%.

Wednesday Night

A chance of showers, mainly before 8pm. Partly cloudy, with a low around 68. Chance of precipitation is 30%.

Thursday

A chance of showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 30%.