Alert archive / New York / Flash Flood Warnings in 2021

Flash Flood Warning 6, NWS New York, NY

July 2, 2021Queens County, New York

NWS New York, NY issued this flash flood warning at Jul 2, 2021, 3:30 PM EDT for Queens County, New York. It was in force for 90 min. 4 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 2, 2021, 3:30 PM EDT (19:30 UTC)
Expired: Jul 2, 2021, 5:00 PM EDT
In force: 90 min
Issued by: NWS New York, NY
Area: Storm-based polygon
Flood severity: None

County Queens County, NY

The radar

The Brookhaven radar (KOKX), 83 km from the middle of the area, began a volume at 19:30 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
Jul 2, 4:27 PM EDT	FLASH FLOOD	1 Ne Flushing, NY	WHITESTONE EXPRESSWAY CLOSED AT 22ND ROAD.
Jul 2, 4:37 PM EDT	FLASH FLOOD	1 Ese Flushing, NY	BUILDING LOBBY FLOODED WITH A FEW INCHES OF WATER. OFFICE ON THE GROUND FLOOR IS PUMPING OUT FLOODWATER.
Jul 2, 4:52 PM EDT	FLASH FLOOD	2 Wnw Jamaica, NY	STANDING WATER UP TO BUMPERS OF CARS.
Jul 2, 4:52 PM EDT	FLASH FLOOD	Flushing, NY	STANDING WATER UP TO BUMPERS OF CARS.

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, 7.5 hours before the alert went out and 83 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: 51 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 836 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 28 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted.

448 
WGUS51 KOKX 021930
FFWOKX
NYC081-022100-
/O.NEW.KOKX.FF.W.0006.210702T1930Z-210702T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
330 PM EDT Fri Jul 2 2021

The National Weather Service in Upton has issued a

* Flash Flood Warning for...
  Queens County in southeastern New York...

* Until 500 PM EDT.

* At 330 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1.5 and 2 inches of 
  rain have fallen. 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...
  Flushing, Laguardia Airport, Jackson Heights and Whitestone.

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.

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 4072 7388 4077 7392 4079 7389 4079 7387
      4080 7385 4081 7382 4080 7379 4080 7378
      4074 7374

FLASH FLOOD...RADAR INDICATED

$$

DS

2 follow-up statements

640 
WGUS71 KOKX 022029
FFSOKX

Flash Flood Statement
National Weather Service New York NY
429 PM EDT Fri Jul 2 2021

NYC081-022100-
/O.CON.KOKX.FF.W.0006.000000T0000Z-210702T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Queens NY-
429 PM EDT Fri Jul 2 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 5 PM EDT THIS 
AFTERNOON FOR QUEENS COUNTY...

At 429 PM EDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Between 2.5 and 3 inches of rain have 
fallen. 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...
  Flushing, Laguardia Airport, Jackson Heights and Whitestone.

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.

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 4072 7388 4077 7392 4079 7389 4079 7387
      4080 7385 4081 7382 4080 7379 4080 7378
      4074 7374

FLASH FLOOD...RADAR INDICATED

$$

DS

285 
WGUS71 KOKX 022058
FFSOKX

Flash Flood Statement
National Weather Service New York NY
458 PM EDT Fri Jul 2 2021

NYC081-022108-
/O.EXP.KOKX.FF.W.0006.000000T0000Z-210702T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Queens NY-
458 PM EDT Fri Jul 2 2021

...FLASH FLOOD WARNING AT 5 PM EDT THIS AFTERNOON FOR QUEENS COUNTY 
HAS BEEN REPLACED WITH A FLOOD ADVISORY...

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

LAT...LON 4072 7388 4077 7392 4079 7389 4079 7387
      4080 7385 4081 7382 4080 7379 4080 7378
      4074 7374

$$

DS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 8:16 PM EDT	Special Marine Warning	OKX		30 min
Jul 1, 11:43 PM EDT	Areal Flood Advisory	OKX	Westchester	78 min
Jul 2, 4:14 AM EDT	Small Craft Advisory	OKX		50 hr
Jul 2, 5:00 AM EDT	Rip Current Statement	OKX	Kings, Nassau, Queens, Suffolk	64 hr
Jul 2, 1:52 PM EDT	Areal Flood Advisory	OKX	Bronx, New York	47 min
Jul 2, 3:18 PM EDT	Areal Flood Advisory	OKX	Nassau, Queens	87 min
Jul 2, 3:52 PM EDT	Special Weather Statement	OKX	Orange	53 min
Jul 2, 4:32 PM EDT	Areal Flood Advisory	OKX	Suffolk	88 min
Jul 2, 4:44 PM EDT	Special Weather Statement	OKX	Orange	61 min
Jul 2, 4:57 PM EDT	Areal Flood Advisory	OKX	Kings, Queens	63 min
Jul 2, 5:34 PM EDT	Severe Thunderstorm Warning	OKX	Orange, Rockland	56 min
Jul 2, 5:56 PM EDT	Areal Flood Advisory	OKX	Nassau, Suffolk	43 min
Jul 2, 6:16 PM EDT	Areal Flood Advisory	OKX	Orange, Putnam, Rockland, Westchester	119 min
Jul 2, 6:28 PM EDT	Special Weather Statement	OKX	Rockland, Westchester	47 min
Jul 2, 7:15 PM EDT	Special Weather Statement	OKX	Putnam	45 min

Nearby

Flash Flood Warnings in New York, 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.