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

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

A Few Clouds

96°F

36°C

Humidity	48%
Wind Speed	SW 10 mph
Barometer	29.91 in (1012.6 mb)
Dewpoint	73°F (23°C)
Visibility	10.00 mi
Heat Index	106°F (41°C)
Last update	3 Jul 2:56 pm EDT

More Information:

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

Extended Forecast for

5 Miles SSE Blue Point NY

Extreme Heat Warning July 3, 04:01pm until July 4, 09:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning July 3, 04:01pm until July 4, 09:00pm
NOW until 9:00pm Sat
Extreme Heat Warning
This Afternoon
High: 88 °F
Isolated
T-storms
Tonight
Low: 77 °F
Scattered
T-storms
Independence Day
High: 87 °F
Sunny then
Scattered
T-storms
Saturday Night
Low: 73 °F
Chance
T-storms
Sunday
High: 76 °F
Chance
Showers
Sunday Night
Low: 70 °F
Showers
Likely
Monday
High: 77 °F
Showers
Likely
Monday Night
Low: 70 °F
Showers

Detailed Forecast

This Afternoon

Isolated showers and thunderstorms after 5pm. Sunny, with a high near 88. Heat index values as high as 96. Southwest wind 14 to 16 mph. Chance of precipitation is 20%.

Tonight

Scattered showers and thunderstorms, mainly before 11pm. Partly cloudy, with a low around 77. West wind 8 to 13 mph. Chance of precipitation is 30%.

Independence Day

Scattered showers and thunderstorms after 2pm. Increasing clouds, with a high near 87. Southwest wind 8 to 13 mph. Chance of precipitation is 30%.

Saturday Night

Scattered showers and thunderstorms. Mostly cloudy, with a low around 73. Southwest wind 7 to 10 mph. Chance of precipitation is 50%.

Sunday

A 30 percent chance of showers, mainly before 2pm. Partly sunny, with a steady temperature around 76. East wind 8 to 10 mph.

Sunday Night

Showers likely, mainly after 2am. Mostly cloudy, with a low around 70. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

Monday

Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 77. Chance of precipitation is 70%.

Monday Night

Showers and possibly a thunderstorm. Low around 70. Chance of precipitation is 80%.

Tuesday

Showers, with thunderstorms also possible after 2pm. High near 75. Chance of precipitation is 80%.

Tuesday Night

A chance of thunderstorms before 8pm, then a chance of showers after 2am. Mostly cloudy, with a low around 70. Chance of precipitation is 30%.

Wednesday

A 30 percent chance of showers. Partly sunny, with a high near 76.

Wednesday Night

Partly cloudy, with a low around 72.