Alert archive / New York / Flash Flood Warnings in 2003

Flash Flood Warning 47, NWS New York, NY

December 24, 2003Rockland County, New York

NWS New York, NY issued this flash flood warning at Dec 24, 2003, 8:00 PM EST for Rockland County, New York. It was in force for 7 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Dec 24, 2003, 8:00 PM EST (01:00 UTC)
Expired
Dec 25, 2003, 3:00 AM EST
In force
7 hr
Issued by
NWS New York, NY
Area
Whole counties

County Rockland County, NY

The radar

The Brookhaven radar (KOKX), 102 km from the middle of the area, began a volume at 01:02 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 00:00Z, 1.0 hours before the alert went out and 102 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 00:00Z on 2003-12-25Temperature 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 00:00Z on 2003-12-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 square meters per square second.1939587897117Sfc1 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
575 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
65 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 250057
FFWOKX
NYC087-240800-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE UPTON NY
800 PM EST WED DEC 24 2003

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS CONTINUED THE

* FLASH FLOOD WARNING FOR...
  ROCKLAND COUNTY IN SOUTHEAST NEW YORK

* UNTIL 300 AM EST THURSDAY

* ALTHOUGH THE RAIN HAS ENDED...THE MAHWAH RIVER AT SUFFERN AT 730 
PM WAS AT 4.7 FEET. FLOOD STAGE IS AT 4.0 FEET. THE RIVER HAS 
CRESTED AND WILL SLOWLY RETURN TO WITHIN ITS BANKS LATER TONIGHT. 
SOME OTHER SMALL RIVERS AND STREAMS IN ROCKLAND COUNTY THAT MAY 
STILL BE OUT OF THEIR BANKS AT THIS TIME WILL ALSO RECEDE LATER 
TONIGHT. 

IN THE MEANTIME...DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE 
WATER COVERS THE ROADWAY...THE WATER MAY BE DEEPER THAN YOU THINK. 

$$

EKH
2 follow-up statements
000 
WGUS71 KOKX 250540
FFSOKX
NYC087-250900-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE UPTON, NY
1230 AM EST THU DEC 25 2003

...THE NATIONAL WEATHER SERVICE CONTINUES THE FLASH FLOOD WARNING 
FOR ROCKLAND COUNTY IN SOUTHEAST NEW YORK...

THE MAHWAH RIVER AT SUFFERN AT 1230 AM WAS AT 4.40 FEET. FLOOD STAGE 
IS AT 4.0 FEET. THE RIVER HAS CRESTED AND WILL SLOWLY RETURN TO 
WITHIN ITS BANKS AROUND 500 AM. SOME OTHER SMALL RIVERS AND STREAMS 
IN ROCKLAND COUNTY THAT MAY STILL BE OUT OF THEIR BANKS AT THIS TIME 
WILL ALSO RECEDE OVERNIGHT. 

IN THE MEANTIME...DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE 
WATER COVERS THE ROADWAY...THE WATER MAY BE DEEPER THAN YOU THINK. 

$$
000 
WGUS71 KOKX 250807
FFSOKX
NYC087-251000-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE UPTON NY
307 AM EST THU DEC 25 2003

...THE FLASH FLOOD WARNING FOR ROCKLAND COUNTY NEW YORK HAS 
EXPIRED...

THE MAHWAH RIVER AT SUFFERN WAS AT A LEVEL OF 4.18 FEET AT 300 AM. 
THE RIVER CRESTED LATE WEDNESDAY NIGHT AND SHOULD RETURN TO BELOW 
ITS FLOOD STAGE OF 4.0 FEET BY AROUND 500 AM. NO ADDITIONAL FLOODING 
IS EXPECTED IN THE COUNTY.

IN THE MEANTIME...DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE 
WATER COVERS THE ROADWAY...THE WATER MAY BE DEEPER THAN YOU THINK. 

$$

REYNOLDS

Nearby

Flash Flood Warnings in New York, 2003Every flash flood warning in 2003

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.