National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Mississippi Valley Summer Heat Wave; Severe Thunderstorms and Flooding Possible to the North

A dangerous summer heat wave will continue much of the Plains, Mid/Lower Mississippi Valley, Southeast U.S. today and Thursday. Areas of severe thunderstorms may occur today and again on Thursday from parts of the northern/central Rockies and High Plains into the Ohio Valley and Carolinas. Excessive rainfall over similar areas may bring flash flooding today and Thursday. Read More >

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Overcast

82°F

28°C

Humidity 56%
Wind Speed NW 8 mph
Barometer 29.85 in (1010.5 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 6 Jul 2:56 pm EDT
Extended Forecast for

Stony Brook NY

  • Tonight

    Tonight: Mostly cloudy, with a low around 67. North wind around 7 mph becoming east after midnight.

    Mostly Cloudy

    Low: 67 °F

  • Thursday

    Thursday: A 20 percent chance of light rain. Mostly cloudy, with a high near 77. East wind around 10 mph.

    Slight Chance
    Light Rain

    High: 77 °F

  • Thursday
    Night

    Thursday Night: A 20 percent chance of light rain before 11pm. Mostly cloudy, with a low around 66. East wind 5 to 7 mph becoming calm after midnight.

    Slight Chance
    Light Rain
    then Mostly
    Cloudy

    Low: 66 °F

  • Friday

    Friday: A 30 percent chance of showers, mainly after 2pm. Mostly cloudy, with a high near 81. East wind around 6 mph.

    Chance
    Showers

    High: 81 °F

  • Friday
    Night

    Friday Night: A 30 percent chance of showers, mainly before 8pm. Mostly cloudy, with a low around 67. South wind around 6 mph becoming light and variable.

    Chance
    Showers

    Low: 67 °F

  • Saturday

    Saturday: Mostly sunny, with a high near 83.

    Mostly Sunny

    High: 83 °F

  • Saturday
    Night

    Saturday Night: Mostly clear, with a low around 63.

    Mostly Clear

    Low: 63 °F

  • Sunday

    Sunday: Sunny, with a high near 80.

    Sunny

    High: 80 °F

  • Sunday
    Night

    Sunday Night: Mostly clear, with a low around 64.

    Mostly Clear

    Low: 64 °F

Detailed Forecast

Tonight
Mostly cloudy, with a low around 67. North wind around 7 mph becoming east after midnight.
Thursday
A 20 percent chance of light rain. Mostly cloudy, with a high near 77. East wind around 10 mph.
Thursday Night
A 20 percent chance of light rain before 11pm. Mostly cloudy, with a low around 66. East wind 5 to 7 mph becoming calm after midnight.
Friday
A 30 percent chance of showers, mainly after 2pm. Mostly cloudy, with a high near 81. East wind around 6 mph.
Friday Night
A 30 percent chance of showers, mainly before 8pm. Mostly cloudy, with a low around 67. South wind around 6 mph becoming light and variable.
Saturday
Mostly sunny, with a high near 83.
Saturday Night
Mostly clear, with a low around 63.
Sunday
Sunny, with a high near 80.
Sunday Night
Mostly clear, with a low around 64.
Monday
Sunny, with a high near 81.
Monday Night
Mostly clear, with a low around 67.
Tuesday
Sunny, with a high near 83.
Tuesday Night
A 40 percent chance of showers. Partly cloudy, with a low around 70.
Wednesday
A 30 percent chance of showers. Mostly sunny, with a high near 86.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
Stony Brook NY
 40.92°N 73.12°W (Elev. 112 ft)
Last Update:
3:25 pm EDT Jul 6, 2022
Forecast Valid:
3pm EDT Jul 6, 2022-6pm EDT Jul 13, 2022
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation