Alert archive / New York / Flash Flood Warnings in 2002

Flash Flood Warning 15, NWS New York, NY

September 2, 2002Bronx County, Westchester County, New York

NWS New York, NY issued this flash flood warning at Sep 2, 2002, 8:45 AM EDT for Bronx County, Westchester County, New York. It was in force for 3 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
Sep 2, 2002, 8:45 AM EDT (12:45 UTC)
Expired
Sep 2, 2002, 11:15 AM EDT
In force
3 hr
Issued by
NWS New York, NY
Area
Counties, with a storm outline in the text

Counties Bronx County, NY, Westchester County, NY

The radar

The Brookhaven radar (KOKX), 79 km from the middle of the area, began a volume at 12:47 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, 0.8 hours before the alert went out and 79 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-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2002-09-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2002-09-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 175 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
454 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
175 m²/s²
0-3 km storm-relative helicity
430 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS51 KOKX 021245 CCA
FFWOKX
NYC005-119-021515-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
840 AM EDT MON SEP 2 2002

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN BRONX COUNTY IN SOUTHEAST NEW YORK
  THIS INCLUDES THE CITY OF EAST TREMONT
  SOUTHERN WESTCHESTER COUNTY IN SOUTHEAST NEW YORK
  THIS INCLUDES THE CITIES OF...RYE...NEW ROCHELLE

* UNTIL 1115 AM EDT

* AT 836 AM EDT...WEATHER SERVICE DOPPLER RADAR INDICATED VERY
  HEAVY RAIN EXTENDING FROM CO-OP CITY NORTHEAST TO PORT CHESTER.


EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF 
HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS 
AND LOW LYING SPOTS.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN 
DEPTH BY FOOT OR BY AUTOMOBILE. IF YOUR VEHICLE STALLS, ABANDON IT 
IMMEDIATELY AND SEEK HIGHER GROUND.

TO REPORT SEVERE WEATHER HAVE THE NEAREST LAW ENFORCEMENT AGENCY
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN
UPTON NY.

LAT...LON 4084 7390 4080 7385 4097 7366 4107 7372

CORRECTED TYPO...

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 2, 8:17 AM EDTFlash Flood WarningOKXKings, Queens2 hr
Sep 2, 8:42 AM EDTFlash Flood WarningOKXBronx, Westchester3 hr

Nearby

Flash Flood Warnings in New York, 2002Every flash flood warning in 2002

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.