Notice of NWS' New Version of Forecast
A new version of Forecast is coming soon!
Click here to visit the new site for details.

Heavy Rain and Flooding in the Southern Plains to the Great Lakes

Several days of heavy rainfall will lead to flash flooding and river flooding from the Southern Plains to the Southern Great Lakes. A band of freezing rain is forecast across portions of the Southern Plains into the Middle Mississippi Valley. Read More >

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

A Few Clouds

60°F

16°C

Humidity 78%
Wind Speed SW 9 mph
Barometer 30.22 in (1023.3 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 21 Feb 3:56 pm EST
Extended Forecast for

Lake Ronkonkoma NY

  • Tonight

    Tonight: A 40 percent chance of showers, mainly before 3am.  Cloudy, with a low around 41. Southwest wind 9 to 11 mph becoming north after midnight.

    Chance
    Showers

    Low: 41 °F

  • Thursday

    Thursday: Rain likely before 5pm, then rain and sleet likely.  Cloudy, with a temperature falling to around 33 by 1pm. Wind chill values between 25 and 35. Northeast wind 11 to 13 mph.  Chance of precipitation is 70%. Little or no sleet accumulation expected.

    Rain Likely
    then
    Rain/Sleet
    Likely

    High: 42 °F

  • Thursday
    Night

    Thursday Night: Rain and sleet likely before 8pm, then a chance of rain.  Cloudy, with a low around 34. Wind chill values between 25 and 30. Northeast wind 9 to 11 mph.  Chance of precipitation is 60%. Little or no sleet accumulation expected.

    Rain/Sleet
    Likely then
    Chance Rain

    Low: 34 °F

  • Friday

    Friday: Rain, mainly after noon.  High near 42. Wind chill values between 25 and 35. East wind around 10 mph.  Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Chance Rain
    then Rain

    High: 42 °F

  • Friday
    Night

    Friday Night: A 40 percent chance of rain, mainly before midnight.  Cloudy, with a temperature rising to around 45 by midnight. Southeast wind 6 to 8 mph becoming west after midnight.

    Chance Rain

    Low: 39 °F

  • Saturday

    Saturday: Mostly cloudy, with a high near 52.

    Mostly Cloudy

    High: 52 °F

  • Saturday
    Night

    Saturday Night: Rain, mainly after midnight.  Low around 40. Chance of precipitation is 90%.

    Chance Rain
    then Rain

    Low: 40 °F

  • Sunday

    Sunday: Rain, mainly before 3pm.  Areas of fog. High near 53. Chance of precipitation is 90%.

    Rain and
    Areas Fog

    High: 53 °F

  • Sunday
    Night

    Sunday Night: A 30 percent chance of showers before 7pm.  Patchy fog before 7pm.  Otherwise, partly cloudy, with a low around 40.

    Chance
    Showers and
    Patchy Fog
    then Partly
    Cloudy

    Low: 40 °F

Detailed Forecast

Tonight
A 40 percent chance of showers, mainly before 3am. Cloudy, with a low around 41. Southwest wind 9 to 11 mph becoming north after midnight.
Thursday
Rain likely before 5pm, then rain and sleet likely. Cloudy, with a temperature falling to around 33 by 1pm. Wind chill values between 25 and 35. Northeast wind 11 to 13 mph. Chance of precipitation is 70%. Little or no sleet accumulation expected.
Thursday Night
Rain and sleet likely before 8pm, then a chance of rain. Cloudy, with a low around 34. Wind chill values between 25 and 30. Northeast wind 9 to 11 mph. Chance of precipitation is 60%. Little or no sleet accumulation expected.
Friday
Rain, mainly after noon. High near 42. Wind chill values between 25 and 35. East wind around 10 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
A 40 percent chance of rain, mainly before midnight. Cloudy, with a temperature rising to around 45 by midnight. Southeast wind 6 to 8 mph becoming west after midnight.
Saturday
Mostly cloudy, with a high near 52.
Saturday Night
Rain, mainly after midnight. Low around 40. Chance of precipitation is 90%.
Sunday
Rain, mainly before 3pm. Areas of fog. High near 53. Chance of precipitation is 90%.
Sunday Night
A 30 percent chance of showers before 7pm. Patchy fog before 7pm. Otherwise, partly cloudy, with a low around 40.
Monday
Partly sunny, with a high near 51.
Monday Night
Partly cloudy, with a low around 34.
Tuesday
Sunny, with a high near 47.
Tuesday Night
Mostly clear, with a low around 33.
Wednesday
Sunny, with a high near 47.
Click Map For Forecast
Point Forecast:
Lake Ronkonkoma NY
 40.83°N 73.11°W (Elev. 98 ft)
3:42 pm EST Feb 21, 2018
4pm EST Feb 21, 2018-6pm EST Feb 28, 2018
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Northeast Radar Mosaic Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database