Alert archive / New York / Flash Flood Warnings in 2011
Flash Flood Warning 34, NWS New York, NY
NWS New York, NY issued this flash flood warning at Aug 21, 2011, 8:18 PM EDT for Kings County, Nassau County, Queens County, New York. It was in force for 97 min. 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
- Aug 21, 2011, 8:18 PM EDT (00:18 UTC)
- Expired
- Aug 21, 2011, 9:55 PM EDT
- In force
- 97 min
- 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), 71 km from the middle of the area, began a volume at 00:19 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 21, 8:40 PM EDT | FLASH FLOOD | Woodmere, NY | INTERSECTION OF PENNISULA BLVD WOODMERE BLVD CLOSED DUE TO FLOODING |
| Aug 21, 8:56 PM EDT | FLASH FLOOD | North Woodmere, NY | CARS STRANDED WITH PEOPLE TRAPPED IN FLOOD WATERS AT 147TH DRIVE AND HOOK CREEK BLVD. |
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 00:00Z, 0.3 hours before the alert went out and 71 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
- 1559 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 748 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 131 m²/s²
- 0-3 km storm-relative helicity
- 204 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 6.1
The text
As transmitted, in the capitals the NWS used until 2016.
097
WGUS51 KOKX 220018
FFWOKX
NYC047-059-081-220215-
/O.NEW.KOKX.FF.W.0034.110822T0018Z-110822T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
818 PM EDT SUN AUG 21 2011
THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NASSAU COUNTY IN SOUTHEAST NEW YORK...
QUEENS COUNTY IN SOUTHEAST NEW YORK...
KINGS (BROOKLYN) COUNTY IN SOUTHEAST NEW YORK...
* UNTIL 1015 PM EDT...
* AT 812 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS PRODUCING HEAVY RAIN OVER SOUTHERN BROOKLYN...QUEENS
AND NASSAU COUNTIES. RAINFALL RATES ARE BETWEEN 1 AND 1 1/2 INCHES
PER HOUR AND ARE BACK BUILDING OVER THE SAME AREA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.
&&
LAT...LON 4056 7391 4056 7392 4062 7376 4063 7376
4064 7391 4058 7393 4058 7394 4081 7381
4092 7352 4066 7342 4064 7348 4061 7342
4059 7356 4060 7356 4064 7349 4064 7352
4061 7364 4059 7356 4058 7358
$$1 follow-up statement
027
WGUS71 KOKX 220155
FFSOKX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
955 PM EDT SUN AUG 21 2011
NYC047-059-081-220202-
/O.CAN.KOKX.FF.W.0034.000000T0000Z-110822T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KINGS (BROOKLYN) NY-QUEENS NY-NASSAU NY-
955 PM EDT SUN AUG 21 2011
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NASSAU...QUEENS AND
KINGS (BROOKLYN) COUNTIES...
HEAVY RAIN THAT PRODUCED FLASH FLOODING NEAR THE SOUTHERN QUEENS AND
NASSAU COUNTY LINE HAS EXITED THE AREA. THE IMMINENT THREAT FOR
FLASH FLOODING HAS ENDED THEREFORE THE WARNING HAS BEEN CANCELLED.
LAT...LON 4056 7391 4056 7392 4062 7376 4063 7376
4064 7391 4058 7393 4058 7394 4081 7381
4092 7352 4066 7342 4064 7348 4061 7342
4059 7356 4060 7356 4064 7349 4064 7352
4061 7364 4059 7356 4058 7358
$$The office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 8:42 PM EDT | Special Marine Warning | OKX | 63 min | |
| Aug 21, 9:18 PM EDT | Special Marine Warning | OKX | 57 min | |
| Aug 21, 9:23 PM EDT | Special Weather Statement | OKX | Suffolk | 37 min |
| Aug 21, 9:33 PM EDT | Flash Flood Warning | OKX | Suffolk | 39 min |
| Aug 21, 9:44 PM EDT | Special Marine Warning | OKX | 91 min | |
| Aug 21, 10:26 PM EDT | Special Marine Warning | OKX | 64 min |
Nearby
Flash Flood Warnings in New York, 2011Every flash flood warning in 2011
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.