Alert archive / New York / Flash Flood Warnings in 2023

Flash Flood Warning 33, NWS New York, NY

July 16, 2023Suffolk County, New York

NWS New York, NY issued this flash flood warning at Jul 16, 2023, 3:03 PM EDT for Suffolk County, New York. It was in force for 3 hr. 6 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jul 16, 2023, 3:03 PM EDT (19:03 UTC)
Expired
Jul 16, 2023, 6:15 PM EDT
In force
3 hr
Issued by
NWS New York, NY
Area
Storm-based polygon
Flood severity
None

County Suffolk County, NY

The radar

The Brookhaven radar (KOKX), 59 km from the middle of the area, began a volume at 19:03 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
Jul 16, 4:30 PM EDTFLASH FLOODEast Quogue, NYVideo shows impassable roadway due to flooding in East Quogue.
Jul 16, 4:42 PM EDTFLASH FLOOD1 Nne East Hampton, NYDisabled vehicle trapped in flood waters in East Hampton.
Jul 16, 4:45 PM EDTFLASH FLOOD1 Nne East Hampton, NYIntersection of Collins Ave and N Main Street in East Hampton is underwater.
Jul 16, 4:50 PM EDTFLASH FLOOD2 W Montauk Highway, NYWidespread road closures in Southampton.
Jul 16, 4:58 PM EDTFLASH FLOOD2 Wnw Bridgehampton, NYSeveral feet of water in basement on Meadow Court.
Jul 16, 5:27 PM EDTFLASH FLOOD1 Nne East Hampton, NYN Main Street closed due to flooding between Collins Ave and Cedar Street.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 6 storm reports to this flash flood warning; the first came 87 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 7.1 hours before the alert went out and 59 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2023-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 236 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2023-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 193 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
236 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
766 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
193 m²/s²
0-3 km storm-relative helicity
223 m²/s²
Significant tornado parameter
0.2
Supercell composite
6.0

Open this sounding in Storm Lab

The text

As transmitted.

231 
WGUS51 KOKX 161903
FFWOKX
NYC103-162215-
/O.NEW.KOKX.FF.W.0033.230716T1903Z-230716T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
303 PM EDT Sun Jul 16 2023

The National Weather Service in Upton has issued a

* Flash Flood Warning for...
  Central Suffolk County in southeastern New York...

* Until 615 PM EDT.

* At 303 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 inches of rain 
  have fallen. The expected rainfall rate is 2 to 3 inches in 1 
  hour. Additional rainfall amounts of 2 to 4 inches are possible in 
  the warned area. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Riverhead, Shirley, Southold, Manorville, Wading River, Center 
  Moriches, Mattituck, Southampton, Westhampton, Sag Harbor, 
  Bridgehampton, Fishers Island, Plum Island, Gardiners Island, 
  Mastic, Mastic Beach, Calverton, Noyack, Shelter Island and 
  Greenport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be aware of your surroundings and do not drive on flooded roads.

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 4099 7289 4100 7265 4126 7205 4127 7207
      4128 7191 4110 7229 4106 7226 4108 7216
      4104 7212 4113 7215 4111 7206 4110 7206
      4109 7206 4103 7208 4101 7209 4109 7194
      4106 7185 4104 7187 4071 7288

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...2-3 INCHES IN 1 HOUR

$$

NV
2 follow-up statements
866 
WGUS71 KOKX 162144
FFSOKX

Flash Flood Statement
National Weather Service New York NY
544 PM EDT Sun Jul 16 2023

NYC103-162215-
/O.CON.KOKX.FF.W.0033.000000T0000Z-230716T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Suffolk NY-
544 PM EDT Sun Jul 16 2023

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM EDT THIS 
EVENING FOR EASTERN SUFFOLK COUNTY...

At 544 PM EDT, Doppler radar indicated moderate to heavy rain 
showers with embedded thunderstorms moving through the area. While 
the intensity of the rainfall has decreased, pockets of heavier 
rainfall of 0.5 to 1 inch an hour are still possible. This could 
aggravate areas where waters is slowly receding.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Fishers Island, Gardiners Island, Plum Island, East Hampton, 
  Hither Hills State Park, Springs, Montauk and Orient.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be aware of your surroundings and do not drive on flooded roads.

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 4112 7236 4126 7205 4127 7207 4128 7191
      4124 7205 4112 7224 4110 7229 4106 7226
      4105 7219 4108 7216 4104 7212 4113 7215
      4111 7206 4110 7206 4109 7206 4103 7208
      4101 7209 4109 7194 4106 7185 4093 7222

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...0.5-1 INCH IN 1 HOUR

$$

DW
285 
WGUS71 KOKX 162206
FFSOKX

Flash Flood Statement
National Weather Service New York NY
606 PM EDT Sun Jul 16 2023

NYC103-162216-
/O.EXP.KOKX.FF.W.0033.000000T0000Z-230716T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Suffolk NY-
606 PM EDT Sun Jul 16 2023

...FLASH FLOOD WARNING WILL EXPIRE AT 615 PM EDT THIS EVENING FOR 
EASTERN SUFFOLK COUNTY...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

A Flood Watch remains in effect until 1200 AM EDT for portions of 
southern Connecticut, northeast New Jersey and southeast New York.

LAT...LON 4112 7236 4126 7205 4127 7207 4128 7191
      4124 7205 4112 7224 4110 7229 4106 7226
      4105 7219 4108 7216 4104 7212 4113 7215
      4111 7206 4110 7206 4109 7206 4103 7208
      4101 7209 4109 7194 4106 7185 4093 7222

$$

DW

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS New York, NY wrote its last area forecast discussion before this flash flood warning went out at Jul 16, 2:48 PM EDT, 15 minutes earlier.

Area forecast discussion, Jul 16, 2:48 PM EDT, 15 minutes before
Area Forecast Discussion
National Weather Service New York NY
248 PM EDT Sun Jul 16 2023

.SYNOPSIS...
A slow moving cold front will approach from the west today and
passes through the area late tonight. High pressure will then
briefly build across the area on Monday. Unsettled weather is
likely to continue through the rest of the week with the
potential for a series of frontal boundaries.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
A Flood Watch remains up for the entire forecast area late
through midnight.

A Tornado Watch remains in effect until 3 PM for eastern
sections of the Lower Hudson Valley, southern CT, and LI.

Current radar shows two heavier bands over our area. One from
northern Nassau and NYC through Fairfield County and another
farther east across New London County. On average in the
heaviest rainfall, rates have been between 1 and 2 inches an
hour. Locally up to 3 inches an hour was seen earlier this
morning across central Suffolk County where ISP recored 3.04 in
1 hour. Another swath of heavier rain can be seen south of Long
Island. This area will have to be monitored for possible flash
flooding over the next several hours.

Overall, the forecast remains on track with the potential for a
significant flood event (possibly major) through the day today
as a frontal system works into the area ahead of another
shortwave being sent east out of the longwave trough. All the
players are there with record PWAT values of 2.25-2.50 inches,
moderate instability, and enhanced low-level convergence ahead
of the approaching front.

The biggest forecast challenge for this event is to pinpoint
where the heaviest axis of rain will set up across the forecast
area. On average, we are looking a widespread 1 to 3 inch
rainfall with localized amounts 4 to 6 inches. At this time, its
hard to rule out the potential for a few isolated spots
with even higher amounts. Rainfall rates of 1 to 2 inches per
hour remain likely with localized 3+.

WPC maintains the moderate risk of Excessive rainfall across much of
the forecast area.

In addition to the flooding threat, the Storm Prediction Center
has placed much of the area in a slight risk of severe weather
today. The main threat will be isolated tornadoes and strong
gusty winds.

Clouds and rainfall today should result in a cooler day, with highs
around 80.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH 6 AM MONDAY/...
Lingering convection in the evening is forecast to work east of
the area during the early morning hours. The cold front is
expected to clear eastern LI/SE CT toward daybreak. Lows are
forecast to be a few cooler, ranging from the upper 60s inland,
to the lower 70s along the coast.

&&

.LONG TERM /MONDAY THROUGH SATURDAY/...
No significant changes have been made to the long term and have
followed the NBM closely for this update.

A persistent longwave upper trough will remain in place over
eastern North American through the time frame, with a series of
shortwave impulses riding through every other day or so this
week with chances for showers/tstms. On Mon we will be in
between impulses and the day should be very warm and somewhat
humid, with highs mostly from the upper 80s to lower 90s, and
afternoon dewpoints from the mid 60s NYC north/west to the lower
70s across Long Island and SE CT. The next chance for organized
convection arrives as the longwave trough axis swings through,
with a marginal risk of excessive rainfall fcst for the Hudson
Valley. Slightly cooler high temps (85-90) and slightly higher
dewpoints (upper 60s/lower 70s) on Tue should yield similar heat
index values to those of Monday.

Max heat index values for the two days should be mostly below 95,
with the possible exception of the urban corridor of NE NJ and some
spots along the north shore of Long Island, with only E Union County
meeting local heat advy criteria of two consecutive days of 95+ heat
index.

Some haze may also be possible Mon night into Tue, per extrapolation
of latest HRRR guidance suggesting some smoke from western Canada
wildfires crossing the Appalachians during that time.

Wed looks like a mostly dry day with shortwave ridging briefly
moving across, then the next organized chance of showers/tstms
should arrive Thu-Fri as the longwave upper trough becomes re-
established. Forecast per NBM currently shows dry conditions for Sat
but confidence in this is low especially east of NYC with
deterministic global models showing a wave of low pressure moving
NNE through the adjacent Atlantic waters.

&&

.AVIATION /19Z SUNDAY THROUGH FRIDAY/...
A slow moving cold front will approach from the west through
this evening, passing through the area during the early morning
hours Monday.

Plan for mainly MVFR conditions for the remainder of this
afternoon with the exception of KGON, where it's likely to
remain IFR. Any brief heavy downpours could produce lower
conditions. In addition, ceilings will likely vary between VFR
and MVFR for the NYC terminals. KBDR, KISP. and KGON may flirt
with IFR ceilings during the first half of the night. VFR
conditions will then develop from west to overnight into the
morning hours.

A southerly flow is expected through this evening with
occasional gusts up to 20 kt possible early at the coastal
terminals. Winds will then diminish this evening, perhaps going
light and variable for a time, before a wind shift to the NW
during the early morning hours. A light northerly flow to start
Monday will give way to late morning/early afternoon seabreezes.

...NY Metro (KEWR/KLGA/KJFK/KTEB) TAF Uncertainty...

Occasional VFR ceilings for the remainder of this afternoon.
Low chance for thunderstorms.

OUTLOOK FOR 18Z MONDAY THROUGH THURSDAY...

Monday: Early morning MVFR possible in cigs at KGON, otherwise
VFR.

Tuesday: MVFR or lower in chance of showers and thunderstorms.

Wednesday: Mainly VFR.

Thursday-Friday: MVFR or lower in chance of showers and
thunderstorms.

Detailed information, including hourly TAF wind component
forecasts, can be found at: https:/www.weather.gov/zny/n90

&&

.MARINE...
Tornado Watch in remains in effect until 3 PM on all waters
except NYC Harbor.

Ahead of an approaching frontal system, southerly winds will
strengthen to around 15 kt on the ocean waters by morning,
increasing seas around 5 ft. A SCA has remains in effect today and
tonight between Fire Island Inlet and Montauk Point.

Sea up to 5 ft may linger on the ocean waters daytime Mon per NWPS
and GFSwave, especially out east. Confidence in this is low as
sustained winds in the persistent S flow daytime Sunday peak only
briefly between 15-20 kt, and will be lighter out of the SW daytime
Mon, so SCA has not been extended into this time frame.

&&

.HYDROLOGY...
A Flood Watch is in effect for the entire CWA late tonight and
Sunday.u

There is the potential for a significant to major flood event today
as a frontal boundary works across the area. All of the area except
eastern LI is under a Moderate Risk for Excessive Rainfall. The
potential is there for scattered to numerous flash floods. On
average, we are looking a widespread 1 to 3 inch rainfall with
localized amounts 4 to 6 inches. At this time, its hard to rule out
the potential for a few isolated spots receiving 7+ inches.
Rainfall rates of 1 to 2 inches per hour remain likely.
Confidence continues to increase for someone in the CWA to see
localized significant flooding.

A marginal risk of excessive rainfall is forecast for the Hudson
Valley for Tuesday, as another passing disturbance helps generate
showers/tstms with heavy rainfall. An ongoing risk may continue with
successive systems later this week.

&&

.TIDES/COASTAL FLOODING...
There is a high risk of rip current development at all the ocean
beaches today and Monday as southerly swells increase.

&&

.OKX WATCHES/WARNINGS/ADVISORIES...
CT...Flood Watch until midnight EDT tonight for CTZ005>012.
NY...Flood Watch until midnight EDT tonight for NYZ067>075-078>081-
     176>179.
     High Rip Current Risk until 9 PM EDT this evening for NYZ075-
     080-081-178-179.
NJ...Flood Watch until midnight EDT tonight for NJZ002-004-006-
     103>108.
MARINE...Small Craft Advisory until 6 AM EDT Monday for ANZ350-353.

&&

SYNOPSIS...BC/BG
NEAR TERM...BC/JT
SHORT TERM...DW
LONG TERM...BG/DBR
AVIATION...DW
MARINE...BC/BG
HYDROLOGY...BC/BG
TIDES/COASTAL FLOODING...
Hazardous weather outlook, Jul 16, 8:25 AM EDT, 6 hours 38 minutes before
Hazardous Weather Outlook
National Weather Service New York NY
825 AM EDT Sun Jul 16 2023

NJZ002-004-006-103>108-NYZ067-069-072>074-176-171230-
Western Passaic-Eastern Passaic-Hudson-Western Bergen-Eastern Bergen-
Western Essex-Eastern Essex-Western Union-Eastern Union-Orange-
Rockland-New York (Manhattan)-Bronx-Richmond (Staten Island)-
Northern Queens-
825 AM EDT Sun Jul 16 2023

...FLOOD WATCH IN EFFECT THROUGH THIS EVENING...

This Hazardous Weather Outlook is for northeast New Jersey and
southeast New York.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flood Watch.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

No hazardous weather is expected at this time that would meet NWS
warning criteria.

.SPOTTER INFORMATION STATEMENT...

Spotter activation according to Standard Operating Procedures is
requested and appreciated.

&&

This Hazardous Weather Outlook provides a summary of potential
widespread hazardous weather events that may reach NWS warning
criteria. Most long fused NWS watches, warnings, and advisories in
effect are highlighted.

Please refer to the latest NWS forecasts for weather not meeting NWS
warning criteria.

CTZ005>012-NYZ068-070-071-078-079-177-171230-
Northern Fairfield-Northern New Haven-Northern Middlesex-
Northern New London-Southern Fairfield-Southern New Haven-
Southern Middlesex-Southern New London-Putnam-Northern Westchester-
Southern Westchester-Northwest Suffolk-Northeast Suffolk-
Northern Nassau-
825 AM EDT Sun Jul 16 2023

...FLOOD WATCH IN EFFECT THROUGH THIS EVENING...
...TORNADO WATCH 497 IN EFFECT UNTIL 3 PM EDT THIS AFTERNOON...

This Hazardous Weather Outlook is for southern Connecticut and
southeast New York.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flood Watch.
   Tornado Watch.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

No hazardous weather is expected at this time that would meet NWS
warning criteria.

.SPOTTER INFORMATION STATEMENT...

Spotter activation according to Standard Operating Procedures is
requested and appreciated.

&&

This Hazardous Weather Outlook provides a summary of potential
widespread hazardous weather events that may reach NWS warning
criteria. Most long fused NWS watches, warnings, and advisories in
effect are highlighted.

Please refer to the latest NWS forecasts for weather not meeting NWS
warning criteria.

NYZ075-178-171230-
Kings (Brooklyn)-Southern Queens-
825 AM EDT Sun Jul 16 2023

...FLOOD WATCH IN EFFECT THROUGH THIS EVENING...
...HIGH RIP CURRENT RISK IN EFFECT THROUGH THIS EVENING...

This Hazardous Weather Outlook is for southeast New York.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flood Watch.
   High Rip Current Risk.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

No hazardous weather is expected at this time that would meet NWS
warning criteria.

.SPOTTER INFORMATION STATEMENT...

Spotter activation according to Standard Operating Procedures is
requested and appreciated.

&&

This Hazardous Weather Outlook provides a summary of potential
widespread hazardous weather events that may reach NWS warning
criteria. Most long fused NWS watches, warnings, and advisories in
effect are highlighted.

Please refer to the latest NWS forecasts for weather not meeting NWS
warning criteria.

NYZ080-081-179-171230-
Southwest Suffolk-Southeast Suffolk-Southern Nassau-
825 AM EDT Sun Jul 16 2023

...FLOOD WATCH IN EFFECT THROUGH THIS EVENING...
...HIGH RIP CURRENT RISK IN EFFECT THROUGH THIS EVENING...
...TORNADO WATCH 497 IN EFFECT UNTIL 3 PM EDT THIS AFTERNOON...

This Hazardous Weather Outlook is for southeast New York.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flood Watch.
   High Rip Current Risk.
   Tornado Watch.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

No hazardous weather is expected at this time that would meet NWS
warning criteria.

.SPOTTER INFORMATION STATEMENT...

Spotter activation according to Standard Operating Procedures is
requested and appreciated.

&&

This Hazardous Weather Outlook provides a summary of potential
widespread hazardous weather events that may reach NWS warning
criteria. Most long fused NWS watches, warnings, and advisories in
effect are highlighted.

Please refer to the latest NWS forecasts for weather not meeting NWS
warning criteria.

ANZ331-332-335-340-345-350-353-355-171230-
Long Island Sound East of New Haven CT/Port Jefferson NY to the
Mouth of the Connecticut River-
Long Island Sound East of the Mouth of the Connecticut River-
Long Island Sound West of New Haven CT/Port Jefferson NY-
Peconic and Gardiners Bays-
South Shore Bays from Jones Inlet through Shinnecock Bay-
Moriches Inlet NY to Montauk Point NY out 20 nm-
Fire Island Inlet NY to Moriches Inlet NY out 20 nm-
Sandy Hook NJ to Fire Island Inlet NY out 20 nm-
825 AM EDT Sun Jul 16 2023

...TORNADO WATCH 497 IN EFFECT UNTIL 3 PM EDT THIS AFTERNOON...

This Hazardous Weather Outlook is for Atlantic coastal waters.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Tornado Watch.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

No hazardous weather is expected at this time that would meet NWS
warning criteria.

.SPOTTER INFORMATION STATEMENT...

Spotter activation according to Standard Operating Procedures is
requested and appreciated.

&&

This Hazardous Weather Outlook provides a summary of potential
widespread hazardous weather events that may reach NWS warning
criteria. Most long fused NWS watches, warnings, and advisories in
effect are highlighted.

Please refer to the latest NWS forecasts for weather not meeting NWS
warning criteria.

ANZ338-171230-
New York Harbor-
825 AM EDT Sun Jul 16 2023

This Hazardous Weather Outlook is for Atlantic coastal waters.

.DAY ONE...Today and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

No hazardous weather is expected at this time that would meet NWS
warning criteria.

.SPOTTER INFORMATION STATEMENT...

Spotter activation according to Standard Operating Procedures is
requested and appreciated.

&&

This Hazardous Weather Outlook provides a summary of potential
widespread hazardous weather events that may reach NWS warning
criteria. Most long fused NWS watches, warnings, and advisories in
effect are highlighted.

Please refer to the latest NWS forecasts for weather not meeting NWS
warning criteria.

In the hours before

Local storm report, Jul 16, 12:09 PM EDT, 2 hours 54 minutes before
Preliminary Local Storm Report
National Weather Service New York NY
1209 PM EDT Sun Jul 16 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0755 AM     Non-Tstm Wnd Gst 2 WNW Captree State Par 40.65N 73.30W
07/16/2023  M52 MPH          ANZ345             NY   Mesonet

            A marine thunderstorm wind gust of 45 kt at
            Mesonet station XGRS Fire Island CG.

&&

JE
Local storm report, Jul 16, 12:10 PM EDT, 2 hours 53 minutes before
Preliminary Local Storm Report
National Weather Service New York NY
1210 PM EDT Sun Jul 16 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0723 AM     Non-Tstm Wnd Gst 1 SE Amityville         40.66N 73.40W
07/16/2023  M40 MPH          Suffolk            NY   Mesonet

            A marine thunderstorm wind gust of 35 kt at
            Mesonet station XHCK Great South Bay.

&&

JE
Local storm report, Jul 16, 12:40 PM EDT, 2 hours 23 minutes before
Preliminary Local Storm Report
National Weather Service New York NY
1240 PM EDT Sun Jul 16 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1050 AM     Flash Flood      New Haven               41.31N 72.92W
07/16/2023                   New Haven          CT   Broadcast Media

            Flooding taking place in neighborhoods on
            the southside of New Haven with high
            standing water with some impassable roads.

&&
Local storm report, Jul 16, 1:40 PM EDT, 1 hour 23 minutes before
Preliminary Local Storm Report
National Weather Service New York NY
140 PM EDT Sun Jul 16 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0100 PM     Flash Flood      1 WSW Danbury Airport   41.37N 73.49W
07/16/2023                   Fairfield          CT   Law Enforcement

            Flooding along Miry Brook Road resulting a
            prolonged stretch of standing water with
            road closures.

&&
Local storm report, Jul 16, 1:41 PM EDT, 1 hour 22 minutes before
Preliminary Local Storm Report...Summary
National Weather Service New York NY
141 PM EDT Sun Jul 16 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0735 AM     Flash Flood      Bethel                  41.37N 73.41W
07/16/2023                   Fairfield          CT   Trained Spotter

            Corrects previous flash flood (time) report
            from Bethel. Mill Plain Road closed in
            Danbury with flooding at Carluzzis Danbury
            Market parking lot. Multiple water rescues
            ongoing in town.

0854 AM     Flash Flood      Central Islip           40.79N 73.20W
07/16/2023                   Suffolk            NY   Dept of Highways

            Flooding on NY 27 in both directions at Exit
            46 from Carelton Avenue to Connetquot Avenue
            with all lanes closed.

0833 AM     Flash Flood      Danbury                 41.40N 73.47W
07/16/2023                   Fairfield          CT   Emergency Mngr

            Road closures due to flooding at West Street
            and Beaverbrook Road off of Federal Road,
            and White Street between Federal and Meadow.

0852 AM     Flash Flood      Danbury                 41.40N 73.47W
07/16/2023                   Fairfield          CT   Emergency Mngr

            Filmore Avenue close due to flooding.

0100 PM     Flash Flood      1 WSW Danbury Airport   41.37N 73.49W
07/16/2023                   Fairfield          CT   Law Enforcement

            Flooding along Miry Brook Road resulting a
            prolonged stretch of standing water with
            road closures.

0903 AM     Flash Flood      East Islip              40.73N 73.19W
07/16/2023                   Suffolk            NY   Amateur Radio

            Road closure with major flooding on Sunrise
            Highway between west of State Route 111 to
            and through Heckshire State Parkway with
            multiple reports of persons stranded in
            vehicles with several local fire departments
            performing wather rescues. 5.23 inches of
            rain in 2 hours.

0755 AM     Non-Tstm Wnd Gst 2 WNW Captree State Par 40.65N 73.30W
07/16/2023  M52 MPH          ANZ345             NY   Mesonet

            A marine thunderstorm wind gust of 45 kt at
            Mesonet station XGRS Fire Island CG.

0723 AM     Non-Tstm Wnd Gst 1 SE Amityville         40.66N 73.40W
07/16/2023  M40 MPH          Suffolk            NY   Mesonet

            A marine thunderstorm wind gust of 35 kt at
            Mesonet station XHCK Great South Bay.

0903 AM     Flash Flood      Islip Terrace           40.75N 73.19W
07/16/2023                   Suffolk            NY   Dept of Highways

            Flooding on Southern State Parkway westbound
            at Exit 44W with all lanes closed.

1050 AM     Flash Flood      New Haven               41.31N 72.92W
07/16/2023                   New Haven          CT   Broadcast Media

            Flooding taking place in neighborhoods on
            the southside of New Haven with high
            standing water with some impassable roads.

0944 AM     Flash Flood      North Babylon           40.73N 73.32W
07/16/2023                   Suffolk            NY   Dept of Highways

            Flooding on NY 231 northbound betwen Garnet
            Street, County Route 4, Ryder Avenue, and
            Weeks Road with all lanes closed.

0815 AM     Flash Flood      3 SSE Peach Lake        41.33N 73.55W
07/16/2023                   Westchester        NY   Dept of Highways

            Corrects (time) previous flash flood report
            from 3 SSE Peach Lake. DOT Flooding and road
            closure on NY 116 in both directions (North
            Salem) between Norton Road and Hunt Lane
            with all lanes closed.

0840 AM     Flash Flood      Waterbury               41.56N 73.04W
07/16/2023                   New Haven          CT   Broadcast Media

            Flooding with closures at Watertown Avenue
            and southbound Route 8 connection.

&&
Special weather statement, Jul 16, 3:03 PM EDT, 0 minutes before
Special Weather Statement
National Weather Service New York NY
303 PM EDT Sun Jul 16 2023

NYZ079-081-161945-
Southeast Suffolk NY-Northeast Suffolk NY-
303 PM EDT Sun Jul 16 2023

...A STRONG THUNDERSTORM WILL IMPACT EASTERN SUFFOLK COUNTY THROUGH
345 PM EDT...

At 303 PM EDT, Doppler radar was tracking a strong thunderstorm over
Southampton, moving north at 35 mph.

HAZARD...Wind gusts up to 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

This strong thunderstorm will be near...
  Bridgehampton around 315 PM EDT.
  Sag Harbor, Noyack and East Hampton around 320 PM EDT.
  Southold around 325 PM EDT.
  Shelter Island and Greenport around 330 PM EDT.
  Plum Island around 345 PM EDT.

Other locations impacted by this storm include East Hampton Airport,
North Sea, Orient, North Haven, Water Mill and Springs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4111 7228 4110 7229 4106 7226 4105 7219
      4114 7213 4112 7209 4106 7212 4109 7215
      4108 7215 4105 7213 4092 7220 4081 7252
      4112 7242 4120 7220 4119 7215 4122 7212
      4124 7205 4126 7205 4125 7201
TIME...MOT...LOC 1903Z 198DEG 30KT 4085 7238

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

Goodman

The office that day

Everything else NWS New York, NY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 16, 4:19 AM EDTAreal Flood AdvisoryOKXOrange3 hr
Jul 16, 5:03 AM EDTAreal Flood AdvisoryOKXOrange2 hr
Jul 16, 5:08 AM EDTSpecial Weather StatementOKXOrange52 min
Jul 16, 5:32 AM EDTAreal Flood AdvisoryOKXOrange3 hr
Jul 16, 5:59 AM EDTFlash Flood WarningOKXOrange114 min
Jul 16, 6:17 AM EDTSpecial Weather StatementOKXRockland43 min
Jul 16, 6:36 AM EDTAreal Flood AdvisoryOKXOrange, Putnam, Rockland, Westchester3 hr
Jul 16, 6:49 AM EDTSpecial Marine WarningOKX86 min
Jul 16, 7:11 AM EDTSpecial Weather StatementOKXNassau49 min
Jul 16, 7:37 AM EDTAreal Flood AdvisoryOKXPutnam, Westchester2 hr
Jul 16, 7:39 AM EDTSpecial Weather StatementOKXWestchester51 min
Jul 16, 7:48 AM EDTFlash Flood WarningOKXPutnam, Westchester3 hr
Jul 16, 7:58 AM EDTAreal Flood AdvisoryOKXSuffolk97 min
Jul 16, 8:15 AM EDTSpecial Marine WarningOKX45 min
Jul 16, 8:19 AM EDTSpecial Weather StatementOKXSuffolk56 min
Jul 16, 8:22 AM EDTFlash Flood WarningOKXSuffolk2 hr
Jul 16, 8:56 AM EDTSpecial Marine WarningOKX76 min
Jul 16, 9:11 AM EDTSpecial Weather StatementOKXSuffolk64 min
Jul 16, 10:21 AM EDTSpecial Marine WarningOKX39 min
Jul 16, 11:30 AM EDTAreal Flood AdvisoryOKXBronx, Kings, Nassau, New York, Queens, Richmond and 2 more3 hr
Jul 16, 12:23 PM EDTFlash Flood WarningOKXPutnam, Westchester3 hr
Jul 16, 12:56 PM EDTFlash Flood WarningOKXBronx, Kings, Nassau, New York, Queens, Westchester88 min
Jul 16, 1:28 PM EDTAreal Flood AdvisoryOKXNassau, Suffolk3 hr
Jul 16, 2:08 PM EDTSpecial Marine WarningOKX37 min
Jul 16, 2:19 PM EDTAreal Flood AdvisoryOKXSuffolk44 min
Jul 16, 2:42 PM EDTSpecial Marine WarningOKX33 min
Jul 16, 3:00 PM EDTAreal Flood AdvisoryOKXPutnam, Westchester105 min
Jul 16, 3:02 PM EDTSpecial Marine WarningOKX28 min
Jul 16, 3:03 PM EDTSpecial Weather StatementOKXSuffolk42 min
Jul 16, 3:15 PM EDTSpecial Marine WarningOKX45 min
Jul 16, 3:26 PM EDTSpecial Marine WarningOKX49 min
Jul 16, 3:46 PM EDTSpecial Marine WarningOKX41 min
Jul 16, 4:08 PM EDTSpecial Marine WarningOKX52 min
Jul 16, 4:36 PM EDTSpecial Marine WarningOKX54 min
Jul 16, 5:00 PM EDTSpecial Marine WarningOKX30 min

Nearby

Flash Flood Warnings in New York, 2023Every flash flood warning in 2023

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.