Heavy Rainfall, Flooding, And Severe Thunderstorm Threats From The Mid South To The Great Lakes Today And Tonight

A slow moving low pressure system and cold front will bring the potential for severe thunderstorms capable of producing damaging winds and isolated tornadoes from portions of the Mid South to the Midwest and Great Lakes today and tonight. Heavy rainfall could also lead to flooding concerns. The severe weather threat will shift to the Mid Atlantic and Northeast on Wednesday. Read More >

Hazardous Weather Conditions

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Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Light Rain

72°F

22°C

Humidity	100%
Wind Speed	S 17 G 30 mph
Barometer	30.16 in (1021.2 mb)
Dewpoint	72°F (22°C)
Visibility	8.00 mi
Last update	25 Sep 7:56 pm EDT

More Information:

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

Extended Forecast for

Islip NYSimilar City Names

Tonight

Heavy Rain
then Chance
Showers and
Patchy Fog
Low: 69 °F
Wednesday

Chance
T-storms
High: 78 °F
Wednesday
Night

T-storms
Likely
Low: 61 °F
Thursday

Partly Sunny
High: 70 °F
Thursday
Night

Slight Chance
Showers
Low: 58 °F
Friday

Chance
Showers then
Partly Sunny
High: 70 °F
Friday
Night

Partly Cloudy
Low: 60 °F
Saturday

Sunny
High: 72 °F
Saturday
Night

Mostly Clear
Low: 58 °F

Detailed Forecast

Tonight

Showers and possibly a thunderstorm before 11pm, then a chance of showers and thunderstorms after 11pm. Some of the storms could produce heavy rainfall. Patchy fog after 1am. Low around 69. South wind 10 to 13 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

Wednesday

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 78. South wind 9 to 14 mph.

Wednesday Night

Showers and thunderstorms likely before 3am, then a slight chance of showers. Some of the storms could produce gusty winds. Mostly cloudy, with a low around 61. Southwest wind around 10 mph becoming north after midnight. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday

Partly sunny, with a high near 70. North wind 8 to 11 mph.

Thursday Night

A 20 percent chance of showers. Mostly cloudy, with a low around 58. East wind around 7 mph.

Friday

A 30 percent chance of showers before noon. Mostly cloudy, with a high near 70.

Friday Night

Partly cloudy, with a low around 60.

Saturday

Sunny, with a high near 72.

Saturday Night

Mostly clear, with a low around 58.