Widespread Summer Heat; Enhanced Severe Weather

A large ridge of high pressure continues to deliver summer heat w/ humidity in several sections of the country. Excessive heat warnings and heat advisories are in effect across the Desert Southwest, south-central Plains, Mid to Lower Mississippi Valley and a small part of the Mid-Atlantic. Meanwhile, an enhanced risk of organized severe thunderstorms is possible from Iowa to Illinois and Indiana. Read More >

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79° N Lon: 73.1° W Elev: 98 ft.

Mostly Cloudy

87°F

31°C

Humidity	42%
Wind Speed	Calm
Barometer	30.08 in (1018.5 mb)
Dewpoint	61°F (16°C)
Visibility	10.00 mi
Heat Index	87°F (31°C)
Last update	20 Aug 1:56 pm EDT

More Information:

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

Detailed forecast for

Southwest Suffolk

This Afternoon

Mostly sunny. Near steady temperature in the lower 80s. South winds 5 to 10 mph.

Tonight

Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Patchy fog after midnight. Humid with lows in the lower 70s. South winds 5 to 10 mph. Chance of rain 30 percent.

Wednesday

Mostly cloudy with a chance of showers and thunderstorms. Humid with highs in the lower 80s. South winds 10 to 15 mph. Chance of rain 50 percent.

Wednesday Night

Mostly cloudy with a chance of showers and thunderstorms. Humid with lows in the lower 70s. Southwest winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 50 percent.

Thursday

Partly sunny with a chance of showers and thunderstorms. Humid with highs in the mid 80s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 50 percent.

Thursday Night

Mostly cloudy with a chance of showers and thunderstorms. Lows in the mid 60s. Chance of rain 50 percent.

Friday

Partly sunny with a chance of showers and thunderstorms. Highs in the upper 70s. Chance of rain 30 percent.

Friday Night

Partly cloudy. Lows in the lower 60s.

Saturday

Sunny. Highs in the upper 70s.

Saturday Night

Mostly clear. Lows in the lower 60s.

Sunday

Sunny. Highs in the mid 70s.