Alert archive / New Jersey / Flash Flood Warnings in 1987

Flash Flood Warning 4, NWS New York, NY

August 5, 19874 counties in New Jersey

NWS New York, NY issued this flash flood warning at Aug 5, 1987, 5:45 PM EDT for 4 counties in New Jersey. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Aug 5, 1987, 5:45 PM EDT (21:45 UTC)
Expired
Aug 5, 1987, 9:00 PM EDT
In force
3 hr
Issued by
NWS New York, NY
Area
Whole counties

Counties Bergen County, NJ, Essex County, NJ, Morris County, NJ, Passaic County, NJ

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Atlantic City In, NJ (KACY), launched 12:00Z, 9.8 hours before the alert went out and 163 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, Atlantic City In, NJ at 12:00Z on 1987-08-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 345 joules per kilogram.LCLLFCEL10008507005003002001001 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, Atlantic City In, NJ at 12:00Z on 1987-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -20 square meters per square second.1939Sfc1 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
345 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
1140 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-20 m²/s²
0-3 km storm-relative helicity
-15 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 
TTAA00 KEWR 052147
FFWEWR
NJC003-013-019-027-031-035-060100-

BULLETIN-IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE NEWARK NJ
545 PM EDT WED AUG 5 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLOOD WARNING EFFECTIVE
UNTIL 900 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF

NORTHERN NEW JERSEY...BERGEN...ESSEX...HUNTERDON...MORRIS...SOUTHEAST
PASSAIC AND SOMERSET COUNTIES.

A FLOOD WARNING IS IN EFFECT FOR THE SMALL STREAMS OVER NORTHERN NEW
JERSEY IN BERGEN...ESSEX...HUNTERDON...MORRIS...SOUTHEAST PASSAIC
AND SOMERSET COUNTIES. THERE WILL ALSO BE CONSIDERABLE URBAN AND
HIGHWAY FLOODING IN FLOOD-PRONE AND POOR DRAINAGE AREAS.

A FLOOD WARNING MEANS FLOODING IS IMMINENT OR IS EXPECTED TO OCCUR.

A SERIES OF VERY HEAVY RAIN SHOWERS CONTINUES TO MOVE OVER THE SAME
AREAS OF NORTHERN NEW JERSEY. THESE SHOWERS EXTEND WEST INTO EASTERN
PENNSYLVANIA.

IF YOU GET ANY INDICATION THAT FLOOD WATERS ARE APPROACHING...MOVE TO
HIGHER GROUND IMuMEDIATEDLY. DO NOT TRY TO DRIVE THROUGH FLOODED AREAS
AND FOLLOW THE DIRECTION OF EMERGENCY MANAGEMENT PERSONNEL.

GIGI/ZAMORSKI

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Aug 5, 2:46 PM EDT, 2 hours 59 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEWARK NJ
245 PM EDT WED AUG 5 1987

...A CLUSTER OF THUNDERSTORMS WITH HEAVY RAIN HAS DEVELOPED TO THE
WEST OF THE METRO AREA...

A CLUSTER OF THUNDERSTORMS WITH HEAVY RAIN HAS DEVELOPED RAPIDLY TO
THE WEST OF THE METRO AREA DURING THE LAST HOUR. THEY WERE MOVING
SOUTHEAST AT 15 MILES AN HOUR.

THE THUNDERSTORMS SHOULD PASS THROUGH THE METRO AREA DURING THE NEXT
HOUR WITH SOUTHERN AND WESTERN SECTIONS MOST LIKELY TO GET THE
STORMS.

THE THUNDERSTORMS WILL CONTAIN HEAVY DOWNPOURS AND LIGHTNING AND
COULD ALSO HAVE STRONG WIND GUSTS. IF YOU SEE ANY THREATENING WEATHER
PLEASE TAKE SHELTER. ANY THUNDERSTORM WHETHER IT IS SEVERE OR NOT
SHOULD BE TAKEN SERIOUSLY.

GIGI
Special weather statement, Aug 5, 5:33 PM EDT, 12 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEWARK NJ
515 PM EDT WED AUG 5 1987

...HEAVY DOWNPOURS CONTINUE OVER NORTHERN NEW JERSEY...

SPOTTER REPORTS FROM NORTHERN NEW JERSEY INDICATED HEAVY DOWNPOURS
WERE CONTINUING ACROSS NORTHERN NEW JERSEY. DURING THE PAST TWO
HOURS 1.10 INCHES OF RAIN HAS FALLEN OVER LAKE HOPATCONG AND 2.24
INCHES OVER RIVER VALE IN NORTHERN BERGEN COUNTY.

HUBCAP HIGH URBAN FLOODING WAS REPORTED ON ROADWAYS IN PASSAIC
TOWNSHIP.

THERE IS A BAND OF HEAVY SHOWERS WHICH EXTENDS FROM BERGEN COUNTY
SOUTHWEST TO HUNTERDON COUNTY. HEAVY DOWNPOURS AND URBAN FLOODING IS
LIkKELY OVER SECTIONS OF BERGEN...PASSAIC...ESSEX...SOMERSET AND
HUNTERDON COUNTIES DURING THE NEXT FEW HOURS.

ALL PERSONS ARE ADVISED TO TRAVEL CAREFULLY OR NOT AT ALL IN FLOOD
PRONE AREAS.

GIGI

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 5, 5:45 PM EDTFlash Flood WarningOKXHunterdon, Somerset3 hr

Nearby

Flash Flood Warnings in New Jersey, 1987Every flash flood warning in 1987

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.