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

86°F

30°C

Humidity	52%
Wind Speed	W 9 mph
Barometer	30.02 in
Dewpoint	66°F (19°C)
Visibility	10.00 mi
Heat Index	88°F (31°C)
Last update	4 Jul 8:47 am EDT

More Information:

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

Extended Forecast for

2 Miles WNW Middletown MD

Extreme Heat Warning July 4, 10:00am until July 4, 09:00pm

Click here for hazard details and duration

Extreme Heat Warning

Independence Day
High: 98 °F
Sunny then
Severe
Thunderstorms
Tonight
Low: 72 °F
Severe
Thunderstorms
then
Scattered
Showers
Sunday
High: 90 °F
Mostly Sunny
then Showers
Likely
Sunday Night
Low: 69 °F
Showers
Monday
High: 84 °F
Showers
Likely then
Showers
Monday Night
Low: 67 °F
Showers
Tuesday
High: 83 °F
Chance
Showers then
Chance
T-storms
Tuesday Night
Low: 67 °F
Chance
T-storms then
Chance
Showers
Wednesday
High: 85 °F
Chance
Showers

Detailed Forecast

Independence Day

Scattered showers and thunderstorms, mainly after 3pm. Some of the storms could be severe. Increasing clouds and hot, with a high near 98. Heat index values as high as 110. West wind 5 to 8 mph. Chance of precipitation is 50%.

Tonight

Showers and thunderstorms likely, mainly before 7pm. Some of the storms could be severe. Mostly cloudy, with a low around 72. Light and variable wind. 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 90. 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. Northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%. 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 84. Southeast wind 3 to 5 mph. Chance of precipitation is 90%.

Monday Night

Showers and possibly a thunderstorm. Low around 67. Chance of precipitation is 80%.

Tuesday

A chance of showers, with thunderstorms also possible after 11am. Partly sunny, with a high near 83. 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 85. 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 89. Chance of precipitation is 30%.