Alert archive / New York / Flash Flood Warnings in 2021
Flash Flood Warning 30, NWS New York, NY
NWS New York, NY issued this flash flood warning at Aug 22, 2021, 3:17 PM EDT for Kings County, Nassau County, Queens County, New York. It was in force for 2 hr. 3 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
- Aug 22, 2021, 3:17 PM EDT (19:17 UTC)
- Expired
- Aug 22, 2021, 5:45 PM EDT
- In force
- 2 hr
- Issued by
- NWS New York, NY
- Area
- Storm-based polygon
- Flood severity
- None
Counties Kings County, NY, Nassau County, NY, Queens County, NY
The radar
The Brookhaven radar (KOKX), 69 km from the middle of the area, began a volume at 19:18 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 |
|---|---|---|---|
| Aug 22, 3:30 PM EDT | FLASH FLOOD | Valley Stream, NY | ROCKAWAY BLVD CLOSED DUE TO FLOODING. |
| Aug 22, 3:42 PM EDT | FLASH FLOOD | Jamaica, NY | TUSKEGEE AIRMEN WAY CLOSED DUE TO FLOODING. |
| Aug 22, 5:00 PM EDT | FLASH FLOOD | 1 Sse Elmhurst, NY | CAR STALLED IN WATER ON WOODHAVEN BLVD IN REGO PARK QUEENS. |
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, 7.3 hours before the alert went out and 69 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.
- Mixed-layer CAPE
- 36 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 563 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 130 m²/s²
- 0-3 km storm-relative helicity
- 163 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
418
WGUS51 KOKX 221917
FFWOKX
NYC047-059-081-222315-
/O.NEW.KOKX.FF.W.0030.210822T1917Z-210822T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
317 PM EDT Sun Aug 22 2021
The National Weather Service in Upton has issued a
* Flash Flood Warning for...
Kings (Brooklyn) County in southeastern New York...
Nassau County in southeastern New York...
Queens County in southeastern New York...
* Until 715 PM EDT.
* At 317 PM EDT, Doppler radar indicated heavy rain moving across
the warned area. Between 2 and 4 inches of rain have fallen.
Additional rainfall amounts of 1 to 2 inches are possible in the
warned area. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by heavy rain.
SOURCE...Radar.
IMPACT...Flash flooding of urban areas, highways, streets and
underpasses as well as other poor drainage and low-
lying areas.
* Some locations that will experience flash flooding include...
Jamaica, Levittown, Freeport, Valley Stream, Long Beach, Glen
Cove, Plainview, Coney Island, Garden City, Massapequa, Lynbrook,
Syosset, Mineola, Woodmere, Westbury, Rockaway Beach, Great Neck,
Farmingdale, Oyster Bay and Kennedy Airport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
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 4081 7379 4081 7377 4088 7373 4086 7366
4090 7365 4093 7351 4090 7348 4065 7342
4066 7340 4062 7342 4060 7341 4057 7376
4053 7394 4056 7395 4056 7402
FLASH FLOOD...RADAR INDICATED
$$
Fig1 follow-up statement
111
WGUS71 KOKX 222145
FFSOKX
Flash Flood Statement
National Weather Service New York NY
545 PM EDT Sun Aug 22 2021
NYC047-059-081-222155-
/O.CAN.KOKX.FF.W.0030.000000T0000Z-210822T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kings (Brooklyn) NY-Nassau NY-Queens NY-
545 PM EDT Sun Aug 22 2021
...FLASH FLOOD WARNING IS CANCELLED FOR KINGS (BROOKLYN), NASSAU AND
QUEENS COUNTIES...
Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.
A Flood Watch remains in effect until 800 PM EDT Monday for portions
of southern Connecticut, northeast New Jersey and southeast New York.
LAT...LON 4081 7379 4081 7377 4088 7373 4086 7366
4090 7365 4093 7351 4090 7348 4065 7342
4066 7340 4062 7342 4060 7341 4057 7376
4053 7394 4056 7395 4056 7402
$$
FigThe office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 8:46 PM EDT | Flash Flood Warning | OKX | Kings, Queens | 5 hr |
| Aug 21, 9:03 PM EDT | Areal Flood Advisory | OKX | Bronx, Kings, Nassau, New York, Queens, Richmond and 1 more | 87 min |
| Aug 21, 10:18 PM EDT | Flash Flood Warning | OKX | New York | 4 hr |
| Aug 21, 10:37 PM EDT | Areal Flood Advisory | OKX | Bronx, Nassau, New York, Queens, Westchester | 83 min |
| Aug 21, 10:47 PM EDT | Flash Flood Warning | OKX | Bronx, Nassau, New York, Queens | 103 min |
| Aug 22, 1:22 AM EDT | Flash Flood Warning | OKX | Richmond | 117 min |
| Aug 22, 2:49 AM EDT | Areal Flood Advisory | OKX | Bronx, Kings, Nassau, New York, Queens | 86 min |
| Aug 22, 8:39 AM EDT | Areal Flood Advisory | OKX | Suffolk | 4 hr |
| Aug 22, 1:32 PM EDT | Areal Flood Advisory | OKX | Kings, Nassau, Queens | 118 min |
| Aug 22, 2:44 PM EDT | Flash Flood Warning | OKX | Bronx, Kings, New York, Queens, Richmond, Rockland and 1 more | 3 hr |
| Aug 22, 4:32 PM EDT | Coastal Flood Statement | OKX | Nassau, Queens, Suffolk, Westchester | 10 hr |
| Aug 22, 4:51 PM EDT | Flash Flood Warning | OKX | Bronx, New York, Orange, Rockland, Westchester | 6 hr |
| Aug 22, 5:17 PM EDT | Small Craft Advisory | OKX | 42 hr |
Nearby
Flash Flood Warnings in New York, 2021Every 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.