Dangerous Heat Wave Continues; Enhanced Area of Severe Thunderstorms Today

A prolonged, dangerous heat wave will continue today in the Midwest and Mississippi Valley, and persist through the Independence Day weekend across the Ohio Valley, Mid-South, and East Coast. Widespread moderate to extreme HeatRisk is forecast. Scattered wind damage and large hail are expected from severe thunderstorms impacting parts of Nebraska into Iowa today. Read More >

Hazardous Weather Conditions

Current conditions at

Groton / New London, Groton / New London Airport (KGON)

Lat: 41.33°NLon: 72.05°WElev: 10ft.

Fair

86°F

30°C

Humidity	65%
Wind Speed	SW 12 G 20 mph
Barometer	29.91 in (1012.7 mb)
Dewpoint	73°F (23°C)
Visibility	10.00 mi
Heat Index	93°F (34°C)
Last update	3 Jul 12:56 pm EDT

More Information:

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

Extended Forecast for

3 Miles NNW South Lyme CT

Extreme Heat Warning July 3, 01:20pm until July 4, 09:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning July 3, 01:20pm until July 4, 09:00pm
NOW until 9:00pm Sat
Extreme Heat Warning
This Afternoon
High: 100 °F
Hot
Tonight
Low: 74 °F
Chance
Showers
Independence Day
High: 97 °F
Sunny then
Chance
Showers
Saturday Night
Low: 69 °F
Partly Cloudy
then Chance
Showers
Sunday
High: 89 °F
Partly Sunny
then Chance
Showers
Sunday Night
Low: 64 °F
Chance
Showers
Monday
High: 82 °F
Showers
Likely
Monday Night
Low: 63 °F
Showers
Likely

Detailed Forecast

This Afternoon

Sunny and hot, with a high near 100. Heat index values as high as 111. West wind around 8 mph.

Tonight

A 30 percent chance of showers, mainly before midnight. Partly cloudy, with a low around 74. Light west wind.

Independence Day

A 30 percent chance of showers and thunderstorms after 4pm. Increasing clouds, with a high near 97. Heat index values as high as 106. West wind 3 to 8 mph.

Saturday Night

A slight chance of showers and thunderstorms, then a chance of showers after midnight. Partly cloudy, with a low around 69. Calm wind. Chance of precipitation is 30%.

Sunday

A slight chance of showers before 8am, then a chance of showers after 2pm. Partly sunny, with a high near 89. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 30%.

Sunday Night

A 50 percent chance of showers. Mostly cloudy, with a low around 64.

Monday

Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 82. Chance of precipitation is 60%.

Monday Night

Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.

Tuesday

A chance of showers and thunderstorms. Partly sunny, with a high near 82. Chance of precipitation is 50%.

Tuesday Night

A 30 percent chance of showers. Mostly cloudy, with a low around 63.

Wednesday

Partly sunny, with a high near 86.