Alert archive / New York / Flash Flood Warnings in 2021

Flash Flood Warning 4, NWS New York, NY

June 8, 20215 counties in New York; Hudson County, New Jersey

NWS New York, NY issued this flash flood warning at Jun 8, 2021, 3:49 PM EDT for 5 counties in New York; Hudson County, New Jersey. It was in force for 2 hr. 1 report 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: Jun 8, 2021, 3:49 PM EDT (19:49 UTC)
Expired: Jun 8, 2021, 5:57 PM EDT
In force: 2 hr
Issued by: NWS New York, NY
Area: Storm-based polygon
Flood severity: None

Counties Hudson County, NJ, Bronx County, NY, Kings County, NY, New York County, NY, Queens County, NY, Richmond County, NY

The radar

The Philadelphia radar (KDIX), 84 km from the middle of the area, began a volume at 19:51 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

Time	Report	Where	Remark
Jun 8, 5:00 PM EDT	FLASH FLOOD	1 Ssw Riverdale, NY	REPORT FROM MPING: STREET/ROAD FLOODING; STREET/ROAD CLOSED; VEHICLES STRANDED.

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

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 7.8 hours before the alert went out and 100 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 740 J/kg
Mixed-layer CIN: -106 J/kg
Mixed-layer LCL: 1004 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 9 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

667 
WGUS51 KOKX 081949
FFWOKX
NJC017-NYC005-047-061-081-085-082300-
/O.NEW.KOKX.FF.W.0004.210608T1949Z-210608T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Upton NY
349 PM EDT Tue Jun 8 2021

The National Weather Service in Upton has issued a

* Flash Flood Warning for...
  Hudson County in northeastern New Jersey...
  Bronx County in southeastern New York...
  Kings (Brooklyn) County in southeastern New York...
  New York (Manhattan) County in southeastern New York...
  Queens County in southeastern New York...
  Richmond (Staten Island) County in southeastern New York...

* Until 700 PM EDT.

* At 349 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain approaching the warned area. Flash flooding is ongoing 
  or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Doppler radar.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other
           drainage and low lying areas.

* Some locations that will experience flash flooding include...
  Jersey City, Jamaica, Flatbush, Flushing, Bayonne, Mott Haven, 
  Hoboken, East Tremont, Coney Island, Rockaway Beach, Todt Hill, 
  Crown Heights, Midtown Manhattan, RFK Bridge, The Verrazano 
  Narrows Bridge, Laguardia Airport, Kennedy Airport, Throgs Neck 
  Bridge, Huguenot and Harlem.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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.

Please report flooding to your local law enforcement agency when you 
can do so safely.

A Flash Flood Warning means that flooding is imminent or occurring. 
If you are in the warned area move to higher ground immediately. 
Residents living along streams and creeks should take immediate 
precautions to protect life and property.

&&

LAT...LON 4052 7425 4054 7425 4056 7422 4064 7419
      4065 7412 4079 7398 4092 7392 4088 7378
      4083 7377 4082 7379 4079 7376 4069 7373
      4057 7378 4053 7394 4056 7395 4056 7401
      4060 7403 4052 7412 4047 7425 4050 7428

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-1.5 INCHES IN 1 HOUR 

$$

JC

1 follow-up statement

872 
WGUS71 KOKX 082157
FFSOKX

Flash Flood Statement
National Weather Service Upton NY
557 PM EDT Tue Jun 8 2021

NJC017-NYC005-047-061-081-085-082207-
/O.CAN.KOKX.FF.W.0004.000000T0000Z-210608T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hudson NJ-Bronx NY-Kings (Brooklyn) NY-New York (Manhattan) NY-
Queens NY-Richmond (Staten Island) NY-
557 PM EDT Tue Jun 8 2021

...FLASH FLOOD WARNING IS CANCELLED FOR HUDSON, BRONX, KINGS 
(BROOKLYN), NEW YORK (MANHATTAN), QUEENS AND RICHMOND (STATEN 
ISLAND) COUNTIES...

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

LAT...LON 4052 7425 4054 7425 4056 7422 4064 7419
      4065 7412 4079 7398 4092 7392 4088 7378
      4083 7377 4082 7379 4079 7376 4069 7373
      4057 7378 4053 7394 4056 7395 4056 7401
      4060 7403 4052 7412 4047 7425 4050 7428

$$

JC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 8, 12:04 AM EDT	Marine Dense Fog Advisory	OKX		9 hr
Jun 8, 12:24 PM EDT	Areal Flood Advisory	OKX	Orange	3 hr
Jun 8, 12:49 PM EDT	Special Weather Statement	OKX	Orange	41 min
Jun 8, 1:07 PM EDT	Flash Flood Warning	OKX	Orange	3 hr
Jun 8, 1:28 PM EDT	Severe Thunderstorm Warning	OKX	Orange	62 min
Jun 8, 2:02 PM EDT	Areal Flood Advisory	OKX	Orange	118 min
Jun 8, 2:07 PM EDT	Severe Thunderstorm Warning	OKX	Putnam, Westchester	38 min
Jun 8, 2:26 PM EDT	Special Weather Statement	OKX	Putnam, Rockland, Westchester	49 min
Jun 8, 2:40 PM EDT	Severe Thunderstorm Warning	OKX	Rockland, Westchester	35 min
Jun 8, 3:06 PM EDT	Areal Flood Advisory	OKX	Rockland, Westchester	114 min
Jun 8, 3:10 PM EDT	Severe Thunderstorm Warning	OKX	Bronx, Rockland, Westchester	50 min
Jun 8, 3:28 PM EDT	Special Marine Warning	OKX		62 min
Jun 8, 3:29 PM EDT	Severe Thunderstorm Warning	OKX	Bronx, Kings, New York, Queens, Richmond	46 min
Jun 8, 3:30 PM EDT	Flash Flood Warning	OKX	Rockland, Westchester	3 hr
Jun 8, 4:10 PM EDT	Special Marine Warning	OKX		43 min
Jun 8, 4:15 PM EDT	Severe Thunderstorm Warning	OKX	Bronx, Kings, Nassau, New York, Queens, Richmond	43 min
Jun 8, 4:30 PM EDT	Special Marine Warning	OKX		45 min
Jun 8, 4:31 PM EDT	Flash Flood Warning	OKX	Nassau, Queens	56 min
Jun 8, 2:58 PM EDT	Severe Thunderstorm Warning	OKX	Bergen	47 min
Jun 8, 3:14 PM EDT	Special Weather Statement	OKX	Essex, Union	46 min
Jun 8, 3:15 PM EDT	Flash Flood Warning	OKX	Bergen, Essex, Hudson, Passaic, Union	3 hr

Nearby

Flash Flood Warnings in New York, 2021 Flash Flood Warnings in New Jersey, 2021 Every flash flood warning in 2021

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.