National Weather Service

Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

A Few Clouds

88°F

31°C

Humidity	43%
Wind Speed	SW 12 mph
Barometer	29.82 in (1009.7 mb)
Dewpoint	63°F (17°C)
Visibility	10.00 mi
Heat Index	89°F (32°C)
Last update	3 Jul 1:56 pm EDT

More Information:

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

Extended Forecast for

Stony Brook NY

Severe T-storm Watch until July 3, 10:00pm

Click here for hazard details and duration

Severe T-storm Watch

Severe T-storm Watch until July 3, 10:00pm
NOW until 10:00pm Thu
Severe T-storm Watch
This Afternoon
High: 90 °F
Severe
Thunderstorms
Tonight
Low: 68 °F
Severe
Thunderstorms
then Mostly
Clear
Independence Day
High: 86 °F
Sunny
Friday Night
Low: 67 °F
Mostly Clear
Saturday
High: 86 °F
Mostly Sunny
Saturday Night
Low: 70 °F
Partly Cloudy
Sunday
High: 88 °F
Mostly Sunny
Sunday Night
Low: 72 °F
Partly Cloudy

Detailed Forecast

This Afternoon

A 30 percent chance of showers and thunderstorms, mainly after 5pm. Some of the storms could be severe. Mostly sunny, with a high near 90. West wind around 9 mph.

Tonight

A 30 percent chance of showers and thunderstorms, mainly before 8pm. Some of the storms could be severe. Partly cloudy, with a low around 68. Northwest wind 6 to 8 mph.

Independence Day

Sunny, with a high near 86. Northwest wind around 8 mph.

Friday Night

Mostly clear, with a low around 67. North wind 3 to 7 mph.

Saturday

Mostly sunny, with a high near 86. Calm wind becoming south 5 to 7 mph in the afternoon.

Saturday Night

Partly cloudy, with a low around 70.

Sunday

Mostly sunny, with a high near 88.

Sunday Night

Partly cloudy, with a low around 72.