Alert archive / New York / Flash Flood Warnings in 2001

Flash Flood Warning 9, NWS New York, NY

June 2, 2001Rockland County, New York

NWS New York, NY issued this flash flood warning at Jun 2, 2001, 9:30 AM EDT for Rockland 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 the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
Jun 2, 2001, 9:30 AM EDT (13:30 UTC)
Expired
Jun 2, 2001, 12:30 PM EDT
In force
3 hr
Issued by
NWS New York, NY
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Rockland County, NY

The radar

The Brookhaven radar (KOKX), 109 km from the middle of the area, began a volume at 13:31 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, 1.5 hours before the alert went out and 109 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 2001-06-02Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2001-06-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 93 square meters per square second.19395878Sfc1 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
440 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
93 m²/s²
0-3 km storm-relative helicity
117 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 021338
FFWOKX
NYC087-021630-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
930 AM EDT SAT JUN 2 2001

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  ROCKLAND COUNTY IN SOUTHEAST NEW YORK
  THIS INCLUDES THE CITIES OF...HAVERSTRAW...NEW CITY...NYACK

* UNTIL 1230 PM EDT

* AT 910 AM EDT...WEATHER SPOTTERS REPORTED FLOODING OCCURRING ALONG
  THE MAHWAH RIVER IN HILLBURN.

  AT 915 AM EDT...THE MAHWAH RIVER AT SUFFERN WAS AT 3.9 FEET AND 
  FLOOD STAGE IS 4 FEET. RAIN WILL TAPER OF THIS MORNING AND WATER
  LEVELS WILL GRADUALLY BEGIN RECEDE. HOWEVER...ANY ADDITIONAL
  RAINFALL THIS MORNING COULD CAUSE THE WATER LEVEL TO RISE TO FLOOD
  STAGE AGAIN. 

  IN ADDITION...ANY OTHER SMALL STREAMS AND CREEKS WHICH ARE OUT OF
  THEIR BANKS ACROSS ROCKLAND COUNTY WILL CONTINUE TO FLOOD UNTIL
  THE RAIN ENDS. ONCE THE RAIN ENDS...THEIR WATERS LEVELS WILL 
  GRADUAL RECEDE.
    
MOTORISTS DRIVING NEAR RIVERS...STREAMS AND CREEKS SHOULD STAY ALERT 
FOR POSSIBLE FLOODING. 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. VEHICLES CAUGHT IN RISING WATER 
SHOULD BE ABANDONED QUICKLY. 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. 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 4114 7420 4113 7415 4105 7391 4130 74*01

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 2, 6:30 AM EDTFlash Flood WarningOKXRockland3 hr
Jun 2, 12:30 PM EDTFlash Flood WarningOKXRockland3 hr

Nearby

Flash Flood Warnings in New York, 2001Every flash flood warning in 2001

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.