Alert archive / New Jersey / Flash Flood Warnings in 1989

Flash Flood Warning 37, NWS New York, NY

October 20, 1989Morris County, Somerset County, New Jersey

NWS New York, NY issued this flash flood warning at Oct 20, 1989, 6:00 PM EDT for Morris County, Somerset County, New Jersey. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Oct 20, 1989, 6:00 PM EDT (22:00 UTC)
Expired
Oct 20, 1989, 8:00 PM EDT
In force
2 hr
Issued by
NWS New York, NY
Area
Whole counties

Counties Morris County, NJ, Somerset 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, 10.0 hours before the alert went out and 141 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 1989-10-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 151 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 1989-10-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 123 square meters per square second.1939587897Sfc1 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
151 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
526 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
123 m²/s²
0-3 km storm-relative helicity
170 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 202207
FFWEWR
NJC023-035-027-210000-

BULLETIN-IMMEDIATE BROADCAST REQUESTED
SMALL STREAM AND URBAN FLOOD WARNING
NATIONAL WEATHER SERVICE NEWARK NJ
600 PM EDT FRI OCT 20 1989

THE NATIONAL WEATHER SERVICE HAS ISSUED A SMALL STREAM AND URBAN
FLOOD WARNING EFFECTIVE UNTIL 800 PM EDT FOR PEOPLE IN THE
FOLLOWING COUNTIES OF

NORTH CENTRAL NEW JERSEY...SOMERSET...MIDDLESEX.

NORTHWEST NEW JERSEY...SOUTHERN MORRIS.

LIGHT TO MODERATE RAIN CONTINUED TO FALL OVER NORTH CENTRAL NEW
JERSEY DURING THE LATE AFTERNOON.  THE RAIN IS EXPECTED TO
PERSIST FOR THE NEXT SEVERAL HOURS AND WILL LIKELY CAUSE ADDITIONAL
RISES IN SMALL STREAMS AND CREEKS WHICH ARE ALREADY NEAR OR AT
BANKFUL.

IF YOU ARE IN THE WARNED COUNTIES IN AN AREA SUBJECT TO FLOODING,
MOVE TO HIGHER GROUND.  DO NOT ATTEMPT TO DRIVE THROUGH FLOOD WATERS.

THOMAS

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, Oct 20, 12:24 PM EDT, 5 hours 36 minutes before
RADAR SUMMARY AND SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
1230 PM EDT FRI OCT 20 1989

...DO NOT USE AFTER 2 PM EDT...

URBAN AND SMALL STREAM FLOOD WATCH IN EFFECT FOR SOUTHEASTERN NEW YORK
STATE AND NORTHERN NEW JERSEY.....

AN EXTENSIVE AREA OF RAIN WITH PATCHES OF MODERATE TO HEAVY RAINSHOWERS
AND POSSIBLE THUNDERSTORMS WAS LOCATED OVER CENTRAL PENNSYLVANIA...
ALL OF NEW JERSEY...NORTHERN DELAWARE,,,THE NEW YORK METROLPOITAN AREA...
LONG ISLAND...MOST OF CONNECTICUT..SOUTHEASTERN NEW YORK STATE...THE WESTERN
THIRD OF MASSACHUSETTS...AND OVER THE OCEAN OUT TO ABOUT 150 MILES SOUTH
OF NEW YORK CITY.

WITHIN THESE AREA WERE HEAVY SHOWERS OVER CONNECTICUT NEAR BRIDGEPORT AND
OVER MOST OF EASTERN NEW JERSEY.

THERE MIGHT BE A SHORT BREAK WITHOUT RAIN BUT IT WILL START UP VERY SHORTLY.
A COLD FRONT ASSOCIATED WITYH A LOW PRESSURE OFF THE MARYLAND COAST WILL MOVE
THROUGH THE AREA LATER TODAY BRINGING MORE RAIN AND HEAVY AT TIMES. THIS
WILL RESULT IN URBAN AND SMALL STREAM FLOODING FOR TODAY.

THE AREA OF RAIN WAS MOVING NORTH AT 20 MILES AN HOUR.

GSK
Special weather statement, Oct 20, 1:29 PM EDT, 4 hours 31 minutes before
RADAR SUMMARY AND SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
130 PM EDT FRI OCT 20 1989

...DO NOT USE AFTER 3 PM EDT...

URBAN AND SMALL STREAM FLOOD WARNING EFFECT FOR SOUTHEASTERN NEW YORK
STATE INCLUDING NEW YORK CITY...WESTCHESTER AND ROCKLAND COUNTIES...NORTHERN
NEW JERSEY.

AN EXTENSIVE AREA OF RAIN WITH PATCHES OF MODERATE TO HEAVY RAINSHOWERS
WAS LOCATED OVER EASTERN PENNSYLVANIA...THE NORTHERN TWO THIRDS OF NEW JERSEY
...THE NEW YORK METROLPOITAN AREA...LONG ISLAND...MOST OF CONNECTICUT...
THE WESTERN HALF OF MASSACHUSETTS...THE LOWER HUDSON VALLEY...AND OUT OVER
THE OCEAN OUT OT 150 MILES SOUTH OF NEW YORK CITY.

WITHIN THESE AREA WERE HEAVY SHOWERS OVER CONNECTICUT NEAR NEW HAVEN.

A COLD FRONT ASSOCIATED WITYH A LOW PRESSURE OFF THE MARYLAND COAST WILL MOVE
THROUGH THE AREA LATER TODAY BRINGING MORE RAIN AND HEAVY AT TIMES. THIS
WILL RESULT IN URBAN AND SMALL STREAM FLOODING FOR TODAY.

THE AREA OF RAIN WAS MOVING NORTH AT 20 MILES AN HOUR.

GSK
Special weather statement, Oct 20, 2:30 PM EDT, 3 hours 30 minutes before
RADAR SUMMARY AND SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
230 PM EDT FRI OCT 20 1989

...DO NOT USE AFTER 4 PM EDT...

URBAN AND SMALL STREAM FLOOD WARNING EFFECT FOR SOUTHEASTERN NEW YORK
STATE INCLUDING NEW YORK CITY...WESTCHESTER AND ROCKLAND COUNTIES...NORTHERN
NEW JERSEY.

AN EXTENSIVE AREA OF RAIN WITH PATCHES OF MODERATE TO HEAVY RAINSHOWERS
WAS LOCATED OVER THE NORTHERN TWO THIRDS OF NEW JERSEY...THE NEW YORK
METROLPOITAN AREA...LONG ISLAND...MOST OF CONNECTICUT...THE WESTERN HALF
OF MASSACHUSETTS...THE LOWER HUDSON VALLEY...AND OUT OVER THE OCEAN OUT TO
ABOUT 150 MILES SOUTH OF NEW YORK CITY.

WITHIN THESE AREA WERE HEAVY SHOWERS OVER WESTERN CONNECTICUT AN9D OVER
CENTRAL LONG ISLAND.

THE RAIN WAS MOVING NORTHEAST AT 20 MILES AN HOUR.

GSK
Special weather statement, Oct 20, 3:27 PM EDT, 2 hours 33 minutes before
RADAR SUMMARY AND SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
330 PM EDT FRI OCT 20 1989

...DO NOT USE AFTER 5 PM EDT...

URBAN AND SMALL STREAM FLOOD WARNING EFFECT FOR SOUTHEASTERN NEW YORK
STATE INCLUDING NEW YORK CITY...WESTCHESTER AND ROCKLAND COUNTIES...NORTHERN
NEW JERSEY.

AN EXTENSIVE AREA OF RAIN WITH PATCHES OF MODERATE TO HEAVY RAINSHOWERS
WAS LOCATED OVER THE NORTHERN TWO THIRDS OF NEW JERSEY...EASTERN PENNSYLVANIA
...THE NEW YORK METROPOLITAN AREA...LONG ISLAND...MOST OF CONNECTICUT...
MOST OF MASSACHUSETTS...THE LOWER HUDSON VALLEY...AND OUT OVER THE OCEAN OUT TO
ABOUT 150 MILES SOUTH OF NEW YORK CITY.

WITHIN THESE AREA WERE HEAVY SHOWERS OVER CENTRAL CpONNECTICUT AND OVER
CENTRAL LONG ISLAND.

THE RAIN WAS MOVING NORTHEAST AT 20 MILES AN HOUR.

GSK

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 20, 11:00 AM EDTFlash Flood WarningOKXMonmouth4 hr
Oct 20, 11:00 AM EDTFlash Flood WarningOKXHunterdon, Somerset4 hr
Oct 20, 11:00 AM EDTFlash Flood WarningOKXWarren4 hr
Oct 20, 12:15 PM EDTFlash Flood WarningOKXMorris, Passaic, Sussex4 hr
Oct 20, 12:15 PM EDTFlash Flood WarningOKXEssex4 hr

Nearby

Flash Flood Warnings in New Jersey, 1989Every flash flood warning in 1989

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.