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

4 Miles SW Ijamsville 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: 91 °F
Mostly Sunny
then Showers
Likely
Sunday Night
Low: 69 °F
Showers
Monday
High: 84 °F
Showers
Monday Night
Low: 68 °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

Showers and thunderstorms likely, mainly between 4pm and 5pm. 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 3 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.

Tonight

Showers and thunderstorms likely before 2am, then isolated showers. 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 between a tenth and quarter 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. Mostly sunny, with a high near 91. Heat index values as high as 100. Light and variable wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday Night

Showers and possibly a thunderstorm before 5am, then showers likely. Low around 69. Northeast wind around 6 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 8am, then a chance of showers and thunderstorms between 8am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 84. East wind 3 to 5 mph. Chance of precipitation is 80%.

Monday Night

Showers and possibly a thunderstorm before 2am, then a chance of showers. 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 83. Chance of precipitation is 50%.

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. Mostly 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%.