Alert archive / New York / Flash Flood Warnings in 2012
Flash Flood Warning 1, NWS New York, NY
NWS New York, NY issued this flash flood warning at May 9, 2012, 5:45 PM EDT for Rockland County, Westchester County, New York. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 9, 2012, 5:45 PM EDT (21:45 UTC)
- Expired
- May 9, 2012, 9:15 PM EDT
- In force
- 4 hr
- Issued by
- NWS New York, NY
- Area
- Storm-based polygon
- Flood severity
- None
Counties Rockland County, NY, Westchester County, NY
The radar
The Brookhaven radar (KOKX), 100 km from the middle of the area, began a volume at 21:46 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.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 9.8 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 451 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 148 m²/s²
- 0-3 km storm-relative helicity
- 217 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
558 WGUS51 KOKX 092145 FFWOKX NYC087-119-092345- /O.NEW.KOKX.FF.W.0001.120509T2145Z-120509T2345Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE NEW YORK NY 545 PM EDT WED MAY 9 2012 THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A * FLASH FLOOD WARNING FOR... WESTCHESTER COUNTY IN SOUTHEAST NEW YORK... ROCKLAND COUNTY IN SOUTHEAST NEW YORK... * UNTIL 745 PM EDT... * AT 541 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED FLASH FLOODING FROM A CLUSTER OF SHOWERS AND THUNDERSTORMS THAT CONTINUE TO GENERATE OVER THE WARNED AREA. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. && LAT...LON 4126 7405 4131 7384 4117 7379 4113 7407 $$ DSW
3 follow-up statements
443 WGUS71 KOKX 092250 FFSOKX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE NEW YORK NY 650 PM EDT WED MAY 9 2012 NYC087-119-092345- /O.CON.KOKX.FF.W.0001.000000T0000Z-120509T2345Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ ROCKLAND NY-WESTCHESTER NY- 650 PM EDT WED MAY 9 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM EDT FOR WESTCHESTER AND ROCKLAND COUNTIES... AT 646 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE AN AREA OF SHOWERS AND THUNDERSTORMS THAT CONTINUES TO DEVELOP AND TRAIN ACROSS THE WARNED AREA. RADAR ESTIMATES 2 TO 3 INCHES OF RAINFALL ACROSS PARTS OF THE AREA WITH THE POTENTIAL FOR AN ADDITIONAL INCH. PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. MOVE TO HIGHER GROUND. && LAT...LON 4114 7403 4124 7400 4131 7384 4117 7379 $$ DSW
187 WGUS51 KOKX 092339 FFWOKX NYC087-119-100115- /O.EXT.KOKX.FF.W.0001.000000T0000Z-120510T0115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE NEW YORK NY 739 PM EDT WED MAY 9 2012 THE NATIONAL WEATHER SERVICE IN UPTON NY HAS EXTENDED THE * FLASH FLOOD WARNING FOR... WESTCHESTER COUNTY IN SOUTHEAST NEW YORK... ROCKLAND COUNTY IN SOUTHEAST NEW YORK... * UNTIL 915 PM EDT... * AT 734 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED CONTINUOUS DEVELOPMENT OF HEAVY RAIN PRODUCING SHOWERS AND THUNDERSTORMS OVER THE WARNED AREA. RADAR HAS ESTIMATED THAT SEVERAL INCHES OF RAINFALL HAS FALLEN ACROSS THIS AREA WITH THE POTENTIAL FOR UP TO ANOTHER INCH OF RAINFALL. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 4114 7403 4124 7400 4131 7384 4117 7379 $$ DSW
261 WGUS71 KOKX 100108 FFSOKX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE NEW YORK NY 908 PM EDT WED MAY 9 2012 NYC087-119-100117- /O.EXP.KOKX.FF.W.0001.000000T0000Z-120510T0115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ ROCKLAND NY-WESTCHESTER NY- 908 PM EDT WED MAY 9 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 915 PM EDT FOR WESTCHESTER AND ROCKLAND COUNTIES... THE THREAT FOR FLASH FLOODING HAS DIMINISHED AT THIS POINT AND ANY ADDITIONAL FLOODING THIS EVENING IS EXPECTED TO BE MINOR. LAT...LON 4114 7403 4124 7400 4131 7384 4117 7379 $$ JM
The office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 9, 5:20 PM EDT | Areal Flood Advisory | OKX | Rockland, Westchester | 55 min |
| May 9, 7:40 PM EDT | Marine Dense Fog Advisory | OKX | 9 hr |
Nearby
Flash Flood Warnings in New York, 2012Every flash flood warning in 2012
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.