Stormy Conditions Continue in the West; Wintry Weather to Intensify Through This Weekend In the Central and Eastern U.S.

An intense Pacific Storm will continue bringing heavy rain and flooding, strong and gusty winds, heavy snow in the mountains up to 6 feet. As the system shifts east, mountain snow will intensify in the Great Basin and Rockies. Another storm system will bring wintry conditions to the central U.S., spreading snow into the Mid-Atlantic, including the DC Metro area in time for the evening commute. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

En Español

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Mostly Cloudy

33°F

1°C

Humidity	48%
Wind Speed	NW 12 mph
Barometer	30.20 in (1022.7 mb)
Dewpoint	15°F (-9°C)
Visibility	10.00 mi
Wind Chill	24°F (-4°C)
Last update	16 Jan 11:56 pm EST

More Information:

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

Extended Forecast for

Port Jefferson NY

Overnight

Mostly Clear
Low: 20 °F
Thursday

Partly Sunny
High: 31 °F
Thursday
Night

Chance Snow
then Snow
Low: 28 °F⇑
Friday

Rain/Snow
then Partly
Sunny
High: 41 °F
Friday
Night

Partly Cloudy
Low: 26 °F
Saturday

Mostly Sunny
High: 33 °F
Saturday
Night

Snow then
Rain/Snow
Low: 30 °F
Sunday

Rain
High: 48 °F
Sunday
Night

Blustery.
Chance Snow
then Mostly
Cloudy
Low: 11 °F

Detailed Forecast

Overnight

Mostly clear, with a low around 20. Wind chill values between 10 and 15. North wind 14 to 16 mph.

Thursday

Partly sunny, with a high near 31. Wind chill values between 10 and 20. North wind 5 to 8 mph becoming southeast in the afternoon.

Thursday Night

Snow, mainly after 1am. Temperature rising to around 33 by 3am. Wind chill values between 20 and 25. Southeast wind 3 to 5 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

Friday

Snow before 8am, then rain between 8am and noon. High near 41. South wind 5 to 7 mph becoming west in the afternoon. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

Friday Night

Partly cloudy, with a low around 26. North wind 8 to 10 mph.

Saturday

Mostly sunny, with a high near 33.

Saturday Night

Snow before 1am, then rain. Low around 30. Chance of precipitation is 90%.

Sunday

Rain. High near 48. Chance of precipitation is 90%.

Sunday Night

A 50 percent chance of snow before 9pm. Mostly cloudy, with a low around 11. Blustery.

M.L.King Day

Mostly sunny and cold, with a high near 19. Blustery.