Alert archive / New York / Flash Flood Warnings in 2023

Flash Flood Warning 64, NWS New York, NY

December 18, 2023Greater Bridgeport Planning Region, Connecticut; Putnam County, Rockland County, Westchester County, New York

NWS New York, NY issued this flash flood warning at Dec 18, 2023, 7:23 AM EST for Greater Bridgeport Planning Region, Connecticut; Putnam County, Rockland County, Westchester County, New York. It was in force for 3 hr. 2 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
Dec 18, 2023, 7:23 AM EST (12:23 UTC)
Expired
Dec 18, 2023, 10:30 AM EST
In force
3 hr
Issued by
NWS New York, NY
Area
Storm-based polygon
Flood severity
None

Counties Greater Bridgeport Planning Region, CT, Putnam County, NY, Rockland County, NY, Westchester County, NY

The radar

The Brookhaven radar (KOKX), 90 km from the middle of the area, began a volume at 12:27 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
Dec 18, 7:26 AM ESTFLASH FLOOD1 Nw Cold Spring, NYFlooding on NY 9D both directions near Fair Street. All lanes closed.
Dec 18, 8:19 AM ESTFLASH FLOOD4 W Mount Kisco, NYFlooding and ramp closure on Taconic State Parkway southbound ramp to Exit 11 NY 134. All lanes blocked.

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 2 storm reports to this flash flood warning; the first came 3 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, 0.4 hours before the alert went out and 90 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 2023-12-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2023-12-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 963 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
455 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
963 m²/s²
0-3 km storm-relative helicity
1042 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

005 
WGUS51 KOKX 181223
FFWOKX
CTC001-NYC079-087-119-181530-
/O.NEW.KOKX.FF.W.0064.231218T1223Z-231218T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
723 AM EST Mon Dec 18 2023

The National Weather Service in Upton has issued a

* Flash Flood Warning for...
  Central Fairfield County in southern Connecticut...
  Putnam County in southeastern New York...
  Rockland County in southeastern New York...
  Westchester County in southeastern New York...

* Until 1030 AM EST.

* At 723 AM EST, Doppler radar indicated heavy rain in Danbury Area. 
  Between 1 and 2.5 inches of rain have fallen. The expected 
  rainfall rate is 0.5 to 1 inch in 1 hour. Additional rainfall 
  amounts of 1 to 2 inches are possible in the warned area. Flash 
  flooding is already occurring.

  HAZARD...Flash flooding caused by heavy rain.

  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...
  Bridgeport, Stamford, Danbury, Ossining, Peekskill, Southbury, New 
  Canaan, Haverstraw, Tarrytown, Mount Kisco, Mahopac, Lake Carmel, 
  Nyack, Sherman, Brewster, Cold Spring, Newtown, Fairfield, 
  Greenwich and Trumbull.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4103 7398 4104 7399 4132 7398 4135 7396
      4139 7395 4144 7398 4149 7393 4153 7353
      4167 7352 4165 7349 4149 7344 4151 7339
      4149 7337 4147 7330 4122 7321

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

$$

DBR
2 follow-up statements
474 
WGUS71 KOKX 181451
FFSOKX

Flash Flood Statement
National Weather Service New York NY
951 AM EST Mon Dec 18 2023

NYC079-087-119-181501-
/O.CAN.KOKX.FF.W.0064.000000T0000Z-231218T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Putnam NY-Rockland NY-Westchester NY-
951 AM EST Mon Dec 18 2023

...FLASH FLOOD WARNING IS CANCELLED FOR PUTNAM, ROCKLAND AND 
WESTCHESTER COUNTIES...

Flooding is no longer expected to pose a threat. Please continue to 
heed remaining road closures.

A Flood Watch remains in effect until 500 PM EST Monday for portions 
of southern Connecticut, northeast New Jersey, and southeast New 
York.

LAT...LON 4115 7351 4120 7351 4121 7348 4125 7351
      4153 7353 4149 7344 4151 7339 4150 7338
      4149 7337 4147 7333 4147 7330 4145 7330
      4145 7329 4122 7321

$$

CTC001-181530-
/O.CON.KOKX.FF.W.0064.000000T0000Z-231218T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fairfield CT-
951 AM EST Mon Dec 18 2023

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1030 AM EST THIS 
MORNING FOR CENTRAL FAIRFIELD COUNTY...

At 951 AM EST, Doppler radar indicated heavy rain in Danbury Area. 
Between 2 and 3 inches of rain have fallen. The expected rainfall 
rate is 0.5 to 1 inch in 1 hour. Additional rainfall amounts of 1 to 
2 inches are possible in the warned area. Flash flooding is already 
occurring.

HAZARD...Flash flooding caused by heavy rain.

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...
  Bridgeport, Danbury, Southbury, New Canaan, Sherman, Newtown, 
  Fairfield, Trumbull, Westport, Ridgefield, Monroe, Bethel, Wilton, 
  Brookfield, New Fairfield, Weston, Redding, Georgetown and Easton.

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.

Excessive runoff from heavy rainfall will cause flooding of urban 
areas, highways, streets and underpasses as well as other drainage 
areas and low lying spots.

&&

LAT...LON 4115 7351 4120 7351 4121 7348 4125 7351
      4153 7353 4149 7344 4151 7339 4150 7338
      4149 7337 4147 7333 4147 7330 4145 7330
      4145 7329 4122 7321

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

$$

DBR
644 
WGUS71 KOKX 181526
FFSOKX

Flash Flood Statement
National Weather Service New York NY
1026 AM EST Mon Dec 18 2023

CTC001-181536-
/O.EXP.KOKX.FF.W.0064.000000T0000Z-231218T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fairfield CT-
1026 AM EST Mon Dec 18 2023

...FLASH FLOOD WARNING WILL EXPIRE AT 1030 AM EST THIS MORNING FOR 
CENTRAL FAIRFIELD 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 500 PM EST Monday for portions 
of southern Connecticut, northeast New Jersey, and southeast New 
York.

LAT...LON 4115 7351 4120 7351 4121 7348 4125 7351
      4153 7353 4149 7344 4151 7339 4150 7338
      4149 7337 4147 7333 4147 7330 4145 7330
      4145 7329 4122 7321

$$

DBR

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 Dec 18, 6:51 AM EST, 32 minutes earlier.

Area forecast discussion, Dec 18, 6:51 AM EST, 32 minutes before
Area Forecast Discussion
National Weather Service New York NY
651 AM EST Mon Dec 18 2023

.SYNOPSIS...
Strong low pressure passes through the area today. The low then
tracks north into southeastern Canada tonight with high pressure
slowly building in during Tuesday. High pressure will then remain in
control through the upcoming weekend.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
No major changes to the forecast with this update.

Low level jet near 2000 feet has peaked at around 85kt on KOKX
radar in the past couple of hours, and as of 6AM is still at
around 75kt. There have been reports of downed trees and gusts
58+mph in some of the warned area so far. No changes have been
made to the High Wind Warning or Wind Advisory with this update.
With surface temperatures near 60, rapid pressure falls helping
downward momentum transfer, and occasional heavy downpours
(some potentially with thunder), still a chance that areas under
the high wind warning continue to see gusts around 60 mph. The
threat for advisory and warning- level winds may very well end
by mid-morning in most spots, but will leave the end time of the
wind headlines at noon for the time being as convection in
association with a strengthening low pressure center to our
south passes over or nearby the coastal areas after the
strongest winds aloft have already shifted east. Gusts otherwise
will be in the range of 25-40mph this afternoon.

Flood Watch remains posted for most of the area. Additional
rivers are expected to see at least minor flooding later this
morning, especially over NE NJ and the Lower Hudson Valley where
the rain has been the heaviest so far, and with upsloping on a
SE wind, will see the most rainfall for the entire event. See
the hydrology section for more details.

Mild with high temperatures in the upper 50s to lower 60s, and
a chance that some records are broken. See the climate section
below for more details.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH TUESDAY NIGHT/...
The low will be north of the area tonight with a brief break in
precipitation. Wrap around moisture in the back side of the storm
with the approach of a closed mid-level will bring a chance of
rain/snow showers well NW of the city late tonight into Tuesday
morning. There may even be slight coating of snow in the higher
terrain of Western Orange County. Dry for Tuesday night with the
flow aloft becoming anticyclonic and surface high pressure building
in.

&&

.LONG TERM /WEDNESDAY THROUGH SUNDAY/...
Upper level low over the eastern Great Lakes region will weaken
into a trough as it moves toward the forecast area. A weak area
of low pressure looks to form along the frontal boundary
offshore, and a blocking pattern will then set up as the trough
becomes an upper level low once again and will interact with the
weak surface low offshore, becoming vertically stacked by the
middle of the week. With a blocked pattern over the region, the
surface high that builds in during Tuesday night will remain over
the area through next weekend. This will sustain a period of dry
weather Wednesday through Sunday.

The area will be on the eastern side of the high during much of the
week, with a northwest to northerly flow for much time. This will
lead to seasonable temperatures with highs in the 40s.

&&

.AVIATION /12Z MONDAY THROUGH FRIDAY/...
HIGH IMPACT AVIATION EVENT TODAY...

Strong low pressure approaches tracks near the region this
morning and then lifts to the north and east, dragging a cold
front through this afternoon.

Widespread IFR/LIFR conditions this morning with improvement behind
the departing surface low and cold front in the afternoon.
Conditions are forecast to improve to MVFR in the afternoon,
becoming VFR by late afternoon for all but KGON, which should
follow by early evening. Cigs on Tuesday may occasionally go
MVFR.

Peak S/SE winds occurring now thru mid morning or so, 20-30kt
G30-50kt, with strongest along the coast. Slow improvement late
morning through the afternoon, with winds veering to S/SW, then
W/NW around 20kt G30-35kt in the afternoon into early evening.
Winds will then gradually diminish and back to the SW G20-25kt
Monday evening. Gusts 20 to 25 kt linger through Tuesday.

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

Isolated 45 to 50 kt gusts thru 15Z this morning, especially at
KJFK and KLGA.

Gusts after 13Z could be more occasional than frequent until low
passes to the east in the early afternoon.

Timing of flight categories could vary by 1-2 hours.

OUTLOOK FOR 12Z TUESDAY THROUGH FRIDAY...

Tuesday: Mainly VFR, brief MVFR cigs possible. WNW G20-25kt in
the afternoon.

Wednesday through Friday: VFR.

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

&&

.MARINE...
Storm Warning remains in effect through this morning on all waters.
Gales will then prevail this afternoon on the ocean and perhaps over
the eastern bays and eastern LI Sound. Otherwise, solid SCA
conditions this afternoon for the rest of the waters. Ocean seas are
expected to range roughly up to 16-21ft during the day today.

All waters will probably be experiencing SCA conds by midnight
tonight, then as winds continue to subside, conditions should be
below advisory thresholds by the end of tonight on the non-ocean
waters. Seas remain elevated on the ocean through at least the end
of the week as long period swells from an offshore storm keep waves
elevated.

&&

.HYDROLOGY...
Mostly 2 to 4 inches of rainfall with locally higher amounts
possible are expected by the end of today. Periods of heavy rain
should continue through mid-morning. The highest amounts are
expected in portions of northeastern New Jersey, into the Lower
Hudson Valley, and possibly into portions of Southwestern
Connecticut (Fairfield County). With flooding of fast responding
streams possibly reaching moderate flooding benchmarks, and flooding
of poor drainage and urban areas, and localized to scattered flash
flooding becoming more likely, the Flood Watch remains in effect
tonight through this afternoon. A few of the faster responding
streams of northeastern New Jersey may even reach major flooding
benchmarks. Residual river flooding will then continue tonight as
levels subside. Afterwards, no hydrologic impacts expected through
next weekend.

&&

.TIDES/COASTAL FLOODING...
Coastal flood warnings continue for southern Queens, southern
and eastern portions of LI and coastal CT, and expanded for NE
NJ as widespread moderate coastal flooding is likely with the
daytime high tide cycle today. This includes the tidally affected
rivers, particularly Hudson and Hackensack rivers, where the surge
is favored to be forced upstream by the strong southerly flow. There
is potential for locally major flood thresholds to be reached for
southern Queens, SW LI and twin forks, if windshift occurs near or
after the time of high tide.

Elsewhere, minor to locally moderate coastal flood potential exists
for NE LI and northern portions of NYC.

Peak surge of 3 1/2 to 5 ft will likely be between high tidal cycles
this morning. A later timing of windshift closer to today's early
afternoon time of high tide will aid potential for major flood
thresholds to be reached or exceeded for the most vulnerable
southern Queens, SW and E LI portions of the area. This will likely
not be evident until the time of high tide is approaching. Forecast
is a blend of 75th percentile of PETSS, Stevens, and deterministic
ESTOFS.

Heavy rainfall and/or runoff coinciding with this afternoon's high
tides will exacerbate street and property flooding issues along the
coast and tidally affected rivers.

Along the ocean beachfront, potential exists for 12-16 ft breakers
today (8-12ft for NYC beachfront), which combined with elevated
water levels, will likely result in widespread dune erosion and
scattered overwashes.

&&

.CLIMATE...
Record high temperatures for December 18th...
EWR...64/1937
BDR...61/1937
NYC...63/1964
LGA...63/2006
JFK...64/1984
ISP...59/1984

&&

.OKX WATCHES/WARNINGS/ADVISORIES...
CT...Flood Watch until 5 PM EST this afternoon for CTZ005>007-
     009>011.
     Wind Advisory until noon EST today for CTZ005>007.
     High Wind Warning until noon EST today for CTZ008>012.
     Coastal Flood Warning until 6 PM EST this evening for
     CTZ009>012.
NY...Flood Watch until 5 PM EST this afternoon for NYZ067>075-176-
     178.
     Wind Advisory until noon EST today for NYZ070>074.
     High Wind Warning until noon EST today for NYZ075-078>081-
     176>179.
     Coastal Flood Warning until 6 PM EST this evening for NYZ071-
     079>081-178-179.
     Coastal Flood Warning from 10 AM this morning to 4 PM EST this
     afternoon for NYZ074-075.
     Coastal Flood Advisory until 6 PM EST this evening for NYZ072-
     073-078-176-177.
NJ...Flood Watch until 5 PM EST this afternoon for NJZ002-004-006-
     103>108.
     Wind Advisory until noon EST today for NJZ006-104-106-108.
     Coastal Flood Warning from 10 AM this morning to 4 PM EST this
     afternoon for NJZ006-104-106-108.
MARINE...Storm Warning until 1 PM EST this afternoon for ANZ331-332-335-
     338-340-345-350-353-355.

&&

SYNOPSIS...JC/JP
NEAR TERM...JC
SHORT TERM...JC
LONG TERM...JP
AVIATION...DR/DW
MARINE...JC/JP
HYDROLOGY...JC/JP
TIDES/COASTAL FLOODING...
CLIMATE...
Hazardous weather outlook, Dec 18, 5:03 AM EST, 2 hours 20 minutes before
Hazardous Weather Outlook
National Weather Service New York NY
503 AM EST Mon Dec 18 2023

NYZ176-191100-
Northern Queens-
503 AM EST Mon Dec 18 2023

...FLOOD WATCH REMAINS IN EFFECT THROUGH THIS AFTERNOON...
...HIGH WIND WARNING IN EFFECT UNTIL NOON EST TODAY...
...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 6 PM EST 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.
   Coastal Flood Advisory.
   High Wind Warning.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Hazardous weather is not expected at this time that would meet NWS
warning criteria.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

&&

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.

NYZ178-191100-
Southern Queens-
503 AM EST Mon Dec 18 2023

...FLOOD WATCH REMAINS IN EFFECT THROUGH THIS AFTERNOON...
...COASTAL FLOOD WARNING IN EFFECT UNTIL 6 PM EST THIS EVENING...
...HIGH WIND WARNING IN EFFECT UNTIL NOON EST TODAY...

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.
   Coastal Flood Warning.
   High Wind Warning.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Hazardous weather is not expected at this time that would meet NWS
warning criteria.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

&&

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.

CTZ007-191100-
Northern Middlesex-
503 AM EST Mon Dec 18 2023

...FLOOD WATCH REMAINS IN EFFECT THROUGH THIS AFTERNOON...
...WIND ADVISORY IN EFFECT UNTIL NOON EST TODAY...

This Hazardous Weather Outlook is for southern Connecticut.

.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.
   Wind Advisory.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Hazardous weather is not expected at this time that would meet NWS
warning criteria.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

&&

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.

CTZ008-191100-
Northern New London-
503 AM EST Mon Dec 18 2023

...HIGH WIND WARNING IN EFFECT UNTIL NOON EST TODAY...

This Hazardous Weather Outlook is for southern Connecticut.

.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.

   High Wind Warning.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Hazardous weather is not expected at this time that would meet NWS
warning criteria.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

&&

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.

CTZ012-NYZ079-081-191100-
Southern New London-Northeast Suffolk-Southeast Suffolk-
503 AM EST Mon Dec 18 2023

...COASTAL FLOOD WARNING IN EFFECT UNTIL 6 PM EST THIS EVENING...
...HIGH WIND WARNING IN EFFECT UNTIL NOON EST TODAY...

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.

   Coastal Flood Warning.
   High Wind Warning.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

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

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

&&

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.

NYZ078-177-191100-
Northwest Suffolk-Northern Nassau-
503 AM EST Mon Dec 18 2023

...HIGH WIND WARNING IN EFFECT UNTIL NOON EST TODAY...
...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 6 PM EST 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.

   Coastal Flood Advisory.
   High Wind Warning.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Hazardous weather is not expected at this time that would meet NWS
warning criteria.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

&&

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.

CTZ011-191100-
Southern Middlesex-
503 AM EST Mon Dec 18 2023

...FLOOD WATCH REMAINS IN EFFECT THROUGH THIS AFTERNOON...
...COASTAL FLOOD WARNING IN EFFECT UNTIL 6 PM EST THIS EVENING...
...HIGH WIND WARNING IN EFFECT UNTIL NOON EST TODAY...

This Hazardous Weather Outlook is for southern Connecticut.

.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.
   Coastal Flood Warning.
   High Wind Warning.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Hazardous weather is not expected at this time that would meet NWS
warning criteria.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

&&

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.

NYZ080-179-191100-
Southwest Suffolk-Southern Nassau-
503 AM EST Mon Dec 18 2023

...COASTAL FLOOD WARNING IN EFFECT UNTIL 6 PM EST THIS EVENING...
...HIGH WIND WARNING IN EFFECT UNTIL NOON EST TODAY...

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.

   Coastal Flood Warning.
   High Wind Warning.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Hazardous weather is not expected at this time that would meet NWS
warning criteria.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

&&

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.

NJZ006-104-106-108-NYZ074-191100-
Hudson-Eastern Bergen-Eastern Essex-Eastern Union-
Richmond (Staten Island)-
503 AM EST Mon Dec 18 2023

...FLOOD WATCH REMAINS IN EFFECT THROUGH THIS AFTERNOON...
...WIND ADVISORY IN EFFECT UNTIL NOON EST TODAY...
...COASTAL FLOOD WARNING IN EFFECT FROM 10 AM THIS MORNING TO 4 PM
EST THIS AFTERNOON...

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.
   Wind Advisory.
   Coastal Flood Warning.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Hazardous weather is not expected at this time that would meet NWS
warning criteria.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

&&

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.

CTZ009-010-191100-
Southern Fairfield-Southern New Haven-
503 AM EST Mon Dec 18 2023

...FLOOD WATCH REMAINS IN EFFECT THROUGH THIS AFTERNOON...
...COASTAL FLOOD WARNING IN EFFECT UNTIL 6 PM EST THIS EVENING...
...HIGH WIND WARNING IN EFFECT UNTIL NOON EST TODAY...

This Hazardous Weather Outlook is for southern Connecticut.

.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.
   Coastal Flood Warning.
   High Wind Warning.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Hazardous weather is not expected at this time that would meet NWS
warning criteria.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

&&

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.

NYZ071-191100-
Southern Westchester-
503 AM EST Mon Dec 18 2023

...FLOOD WATCH REMAINS IN EFFECT THROUGH THIS AFTERNOON...
...COASTAL FLOOD WARNING IN EFFECT UNTIL 6 PM EST THIS EVENING...
...WIND ADVISORY IN EFFECT UNTIL NOON EST TODAY...

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.
   Coastal Flood Warning.
   Wind Advisory.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Hazardous weather is not expected at this time that would meet NWS
warning criteria.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

&&

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.

NYZ072-073-191100-
New York (Manhattan)-Bronx-
503 AM EST Mon Dec 18 2023

...FLOOD WATCH REMAINS IN EFFECT THROUGH THIS AFTERNOON...
...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 6 PM EST THIS EVENING...
...WIND ADVISORY IN EFFECT UNTIL NOON EST TODAY...

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.
   Coastal Flood Advisory.
   Wind Advisory.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Hazardous weather is not expected at this time that would meet NWS
warning criteria.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

&&

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.

NYZ075-191100-
Kings (Brooklyn)-
503 AM EST Mon Dec 18 2023

...FLOOD WATCH REMAINS IN EFFECT THROUGH THIS AFTERNOON...
...HIGH WIND WARNING IN EFFECT UNTIL NOON EST TODAY...
...COASTAL FLOOD WARNING IN EFFECT FROM 10 AM THIS MORNING TO 4 PM
EST 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 Wind Warning.
   Coastal Flood Warning.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Hazardous weather is not expected at this time that would meet NWS
warning criteria.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

&&

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.

NJZ002-004-103-105-107-NYZ067>069-191100-
Western Passaic-Eastern Passaic-Western Bergen-Western Essex-
Western Union-Orange-Putnam-Rockland-
503 AM EST Mon Dec 18 2023

...FLOOD WATCH REMAINS IN EFFECT THROUGH THIS AFTERNOON...

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...Tuesday through Sunday.

Hazardous weather is not expected at this time that would meet NWS
warning criteria.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

&&

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.

CTZ005-006-NYZ070-191100-
Northern Fairfield-Northern New Haven-Northern Westchester-
503 AM EST Mon Dec 18 2023

...FLOOD WATCH REMAINS IN EFFECT THROUGH THIS AFTERNOON...
...WIND ADVISORY IN EFFECT UNTIL NOON EST TODAY...

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.
   Wind Advisory.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

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

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

&&

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.

ANZ331-332-335-338-340-345-350-353-355-191100-
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-
New York Harbor-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-
503 AM EST Mon Dec 18 2023

...STORM WARNING IN EFFECT UNTIL 1 PM EST 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.

   Storm Warning.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Hazardous weather is not expected at this time that would meet NWS
warning criteria.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

&&

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, Dec 18, 6:24 AM EST, 59 minutes before
Preliminary Local Storm Report
National Weather Service New York NY
624 AM EST Mon Dec 18 2023

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

0455 AM     Non-Tstm Wnd Gst 2 E Fairfield           41.13N 73.24W
12/18/2023  M60 MPH          Fairfield          CT   Mesonet

            Mesonet station GW0038 Fairfield.

&&
Local storm report, Dec 18, 6:26 AM EST, 57 minutes before
Preliminary Local Storm Report
National Weather Service New York NY
626 AM EST Mon Dec 18 2023

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

0455 AM     Non-Tstm Wnd Gst 2 SSW Eatons Neck       40.93N 73.40W
12/18/2023  M60 MPH          ANZ335             NY   Mesonet

            Mesonet station DVI08956 Northport.

&&
Local storm report, Dec 18, 6:28 AM EST, 55 minutes before
Preliminary Local Storm Report
National Weather Service New York NY
628 AM EST Mon Dec 18 2023

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

0500 AM     Non-Tstm Wnd Gst 2 SW Groton Airport     41.31N 72.08W
12/18/2023  M59 MPH          ANZ332             CT   Mesonet

            Mesonet station LDLC3 2 S Groton.

&&
Local storm report, Dec 18, 6:29 AM EST, 54 minutes before
Preliminary Local Storm Report
National Weather Service New York NY
629 AM EST Mon Dec 18 2023

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

0455 AM     Non-Tstm Wnd Gst 1 SSW Rye               40.96N 73.69W
12/18/2023  M58 MPH          Westchester        NY   Mesonet

            Mesonet station VWB01 Disbrow Park.

&&
Local storm report, Dec 18, 6:50 AM EST, 33 minutes before
Preliminary Local Storm Report
National Weather Service New York NY
650 AM EST Mon Dec 18 2023

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

0630 AM     Flood            1 SSE Danbury           41.39N 73.46W
12/18/2023                   Fairfield          CT   Emergency Mngr

            Water rescue due to areal flooding on West
            Street and Benedict Avenue.

&&
Local storm report, Dec 18, 6:54 AM EST, 29 minutes before
Preliminary Local Storm Report
National Weather Service New York NY
654 AM EST Mon Dec 18 2023

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

0630 AM     Flood            2 WSW Danbury           41.39N 73.52W
12/18/2023                   Fairfield          CT   Emergency Mngr

            Water rescue due to areal flooding on Mill
            Plain Road.

&&

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 18, 2:45 AM ESTAreal Flood AdvisoryOKXGreater Bridgeport Planning Region5 hr
Dec 18, 3:16 AM ESTAreal Flood AdvisoryOKXGreater Bridgeport Planning Region, Naugatuck Valley Planning Region5 hr
Dec 18, 6:11 AM ESTAreal Flood WarningOKXGreater Bridgeport Planning Region, Naugatuck Valley Planning Region3 hr
Dec 18, 7:23 AM ESTAreal Flood AdvisoryOKXGreater Bridgeport Planning Region112 min
Dec 18, 7:45 AM ESTFlash Flood WarningOKXGreater Bridgeport Planning Region3 hr
Dec 18, 8:27 AM ESTAreal Flood AdvisoryOKXLower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region3 hr
Dec 18, 8:41 AM ESTFlash Flood WarningOKXGreater Bridgeport Planning Region, Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region3 hr
Dec 18, 9:45 AM ESTRiver Flood WarningOKXSoutheastern Connecticut Planning Region18 hr
Dec 18, 4:23 PM ESTAreal Flood AdvisoryOKXNaugatuck Valley Planning Region10 hr
Dec 18, 4:40 PM ESTAreal Flood AdvisoryOKXNaugatuck Valley Planning Region5 hr
Dec 18, 4:21 AM ESTAreal Flood WarningOKXOrange, Rockland, Westchester7 hr
Dec 18, 5:00 AM ESTRiver Flood WarningOKXOrange, Rockland44 hr
Dec 18, 6:57 AM ESTAreal Flood AdvisoryOKXOrange117 min
Dec 18, 7:06 AM ESTFlash Flood WarningOKXOrange, Putnam, Rockland3 hr
Dec 18, 7:29 AM ESTAreal Flood AdvisoryOKXNassau, Suffolk3 hr
Dec 18, 9:21 AM ESTGale WarningOKX12 hr
Dec 18, 10:11 AM ESTAreal Flood WarningOKXRockland4 hr
Dec 18, 10:36 AM ESTSmall Craft AdvisoryOKX3 hr
Dec 18, 11:49 AM ESTAreal Flood AdvisoryOKXBronx, Westchester2 hr
Dec 18, 2:15 PM ESTAreal Flood AdvisoryOKXBronx, Rockland, Westchester2 hr
Dec 18, 4:06 PM ESTAreal Flood WarningOKXRockland14 hr
Dec 18, 4:16 PM ESTAreal Flood AdvisoryOKXBronx, Westchester4 hr
Dec 18, 4:58 PM ESTAreal Flood AdvisoryOKXRockland8 hr
Dec 18, 5:59 PM ESTSmall Craft AdvisoryOKX36 hr

Nearby

Flash Flood Warnings in New York, 2023Flash Flood Warnings in Connecticut, 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.