Severe Weather and Flood Potential for the East; Fire Weather Concerns for the Southwest and Alaska

Severe thunderstorms and heavy rainfall will affect the eastern portions of the country today. Across the Pacific Northwest and northern Plains, showers with the chance for severe thunderstorms later today. For the Southwest and southern portions of Alaska, fire weather concerns expected today and could extend into the holiday weekend. Rip currents are possible for the east coast and Puerto Rico. Read More >

En Español

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Overcast

67°F

19°C

Humidity	93%
Wind Speed	S 14 mph
Barometer	29.89 in (1012.3 mb)
Dewpoint	65°F (18°C)
Visibility	10.00 mi
Last update	27 May 3:56 pm EDT

More Information:

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

Extended Forecast for

Port Jefferson NY

Tonight

Showers and
Patchy Fog
Low: 62 °F
Saturday

Chance
Showers and
Areas Fog
then Showers
Likely
High: 72 °F
Saturday
Night

Chance
Showers then
Mostly Clear
Low: 59 °F
Sunday

Sunny
High: 76 °F
Sunday
Night

Mostly Clear
Low: 61 °F
Memorial
Day

Sunny
High: 81 °F
Monday
Night

Partly Cloudy
Low: 66 °F
Tuesday

Mostly Sunny
High: 84 °F
Tuesday
Night

Partly Cloudy
Low: 59 °F

Detailed Forecast

Tonight

Showers and possibly a thunderstorm, mainly before 5am, then a chance of showers and thunderstorms after 5am. Patchy fog after 8pm. Low around 62. South wind 10 to 14 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Saturday

A chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Areas of fog before 11am. Otherwise, mostly cloudy, with a high near 72. South wind around 9 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Saturday Night

A 30 percent chance of showers before 8pm. Mostly clear, with a low around 59. West wind 5 to 8 mph.

Sunday

Sunny, with a high near 76. Calm wind becoming south around 5 mph in the afternoon.

Sunday Night

Mostly clear, with a low around 61. Southwest wind around 7 mph.

Memorial Day

Sunny, with a high near 81.

Monday Night

Partly cloudy, with a low around 66.

Tuesday

Mostly sunny, with a high near 84.