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

Lancaster, Lancaster Airport (KLNS)

Lat: 40.12°NLon: 76.29°WElev: 397ft.

Fair

99°F

37°C

Humidity	31%
Wind Speed	SW 10 mph
Barometer	29.85 in (1010.4 mb)
Dewpoint	63°F (17°C)
Visibility	10.00 mi
Heat Index	101°F (38°C)
Last update	4 Jul 5:53 pm EDT

More Information:

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

Extended Forecast for

Marietta PA

Severe T-storm Watch until July 4, 11:00pm

Extreme Heat Warning July 4, 06:22pm until July 4, 08:00pm

Click here for hazard details and duration

...

Severe T-storm Watch until July 4, 11:00pm
Extreme Heat Warning July 4, 06:22pm until July 4, 08:00pm
NOW: Multiple hazards in effect
Click HERE for Details
Tonight
Low: 70 °F
Severe
Thunderstorms
Sunday
High: 87 °F
Partly Sunny
then Showers
Likely
Sunday Night
Low: 67 °F
Heavy Rain
Monday
High: 77 °F
Showers then
T-storms
Monday Night
Low: 65 °F
T-storms then
Showers
Tuesday
High: 77 °F
Showers
Likely then
Chance
T-storms
Tuesday Night
Low: 64 °F
Chance
T-storms then
Mostly Cloudy
Wednesday
High: 80 °F
Mostly Sunny

Detailed Forecast

Tonight

Showers and thunderstorms likely, mainly before 11pm. Some of the storms could be severe. Cloudy, then gradually becoming partly cloudy, with a low around 70. West wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Sunday

A slight chance of showers before 2pm, then a chance of showers and thunderstorms between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Partly sunny, with a high near 87. Light and variable wind. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Sunday Night

Showers and possibly a thunderstorm before 3am, then a chance of showers and thunderstorms between 3am and 5am, then showers likely and possibly a thunderstorm after 5am. Some of the storms could produce heavy rainfall. Low around 67. Northwest wind 5 to 8 mph becoming southeast after midnight. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.

Monday

Showers and possibly a thunderstorm. High near 77. East wind 5 to 8 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

Monday Night

Showers and possibly a thunderstorm. Low around 65. Northeast wind 7 to 9 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

Tuesday

Showers likely, with thunderstorms also possible after 11am. Mostly cloudy, with a high near 77. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tuesday Night

A chance of thunderstorms before 8pm. Mostly cloudy, with a low around 64. Chance of precipitation is 30%.

Wednesday

Mostly sunny, with a high near 80.

Wednesday Night

Partly cloudy, with a low around 67.

Thursday

Mostly sunny, with a high near 86.

Thursday Night

Partly cloudy, with a low around 70.

Friday

Showers likely and possibly a thunderstorm. Partly sunny, with a high near 86. Chance of precipitation is 60%.