FLASH FLOOD EMERGENCY FOR NORTHWESTERN SUFFOLK COUNTY ...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 AM EDT EARLY THIS
MORNING FOR WEST CENTRAL SUFFOLK COUNTY...
At 317 AM EDT, The heavy rainfall has moved east of the warned area.
Doppler radar indicated thunderstorms produced between 6 and 10
inches of rainfall across the area since 9 pm, with hourly rainfall
rates as high as 3 to 4 inches per hour. Significant and widespread
flood impacts have been reported, and will continue overnight.
This is a FLASH FLOOD EMERGENCY for Northwestern Suffolk County.
This is a PARTICULARLY DANGEROUS SITUATION. SEEK HIGHER GROUND NOW!
HAZARD...Life threatening flash flooding.
SOURCE...Radar.
IMPACT...This is a PARTICULARLY DANGEROUS SITUATION. Life
threatening flash flooding of basements, low water
crossings, small creeks and streams, urban areas,
highways, streets and underpasses is occurring.
Some locations that will experience flash flooding include...
Brentwood, Commack, Huntington Station, Centereach, Deer Park,
Hauppauge, Ronkonkoma, Huntington, Stony Brook, Middle Island,
Port Jefferson, Wading River, Northport, Coram, Dix Hills,
Smithtown, Melville, Farmingville, Rocky Point and Mount Sinai.
Effective: Mon Aug 19th 3:17 AM
Expires: Mon Aug 19th 4:30 AM
Rain, some heavy, and thunderstorms to affect the area late Sunday night
Monday
August 19
Thunderstorms
High 83°F
Lowi 64°F
Monday Night
Thunderstorms
Tuesday
August 20
Intermittent clouds
High 76°F
Lowi 58°F
Tuesday Night
Mostly clear
Wednesday
August 21
Intermittent clouds
High 75°F
Lowi 57°F
Wednesday Night
Mostly clear
Thursday
August 22
Mostly sunny
High 75°F
Lowi 61°F
Thursday Night
Clear
Friday
August 23
Sunny
High 79°F
Lowi 64°F
Friday Night
Clear
Hourly Forecast
Time
Temp
Condition
Precipitation
5:00 AM
71°F
Rain
79%
6:00 AM
72°F
Rain
79%
7:00 AM
72°F
Rain
79%
8:00 AM
74°F
Cloudy
49%
9:00 AM
76°F
Thunderstorms
51%
10:00 AM
77°F
Mostly cloudy
47%
11:00 AM
79°F
Mostly cloudy
32%
12:00 PM
80°F
Mostly cloudy
32%
1:00 PM
82°F
Mostly cloudy
37%
2:00 PM
83°F
Mostly cloudy
49%
3:00 PM
82°F
Thunderstorms
61%
4:00 PM
80°F
Mostly cloudy
49%
More Information About Long Island Weather
Long Island has a climate that is very similar to other coastal areas of the Northeastern United States; it has warm, humid summers and cold winters, but the Atlantic Ocean helps bring afternoon sea breezes that temper the heat in the warmer months and limit the frequency and severity of thunderstorms. In the wintertime, temperatures are warmer than areas further inland (especially in the night and early morning hours), sometimes causing a snowstorm further inland to fall as rain on the island. However, measurable snow falls every winter, and in many winters one or more intense storms called nor'easters produce blizzard conditions with snowfalls of 1-2 feet and near-hurricane force winds.
Temperatures in Nassau and Suffolk are similar. The winter average for Nassau is 33.7 degrees Fahrenheit, compared to a summer average of 72.7 degrees. In Suffolk, the winter average is 32.4 and summer average is 71.9 degrees.
The Nassau area receives about 45 inches of rain, compared to 42 inches for Suffolk. Snow falls at about 26.9 inches per year in Nassau and 30 inches for Suffolk.