Alert archive / New York / Flash Flood Warnings in 1989

Flash Flood Warning 9, NWS New York, NY

June 9, 1989Suffolk County, New York

NWS New York, NY issued this flash flood warning at Jun 9, 1989, 11:50 PM EDT for Suffolk County, New York. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Jun 9, 1989, 11:50 PM EDT (03:50 UTC)
Expired
Jun 10, 1989, 2:45 AM EDT
In force
3 hr
Issued by
NWS New York, NY
Area
Whole counties

County Suffolk County, NY

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

Albany, NY (KALB), launched 00:00Z, 3.8 hours before the alert went out and 216 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, Albany, NY at 00:00Z on 1989-06-10Temperature 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, Albany, NY at 00:00Z on 1989-06-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 142 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
684 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
142 m²/s²
0-3 km storm-relative helicity
283 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 KNYC 100352
FFWNYC
NYC103-100645-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
URBAN AND SMALL STREAM FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
1150 PM EDT FRI JUN 9 1989

THE NATIONAL WEATHER SERVICE HAS ISSUED A URBAN AND SMALL
STREAM FLOOD WARNING EFFECTIVE UNTIL 245 AM EDT FOR PEOPLE IN
THE FOLLOWING COUNTY

   IN THE STATE OF NEW YORK
      SUFFOLK

AT 1130 PM RADAR IN NEW YORK CITY DETECTED THUNDERSTORMS
MOVING NORTHEASTWARD ACROSS SUFFOLK COUNTY. THESR THUNDERSTORMS
ARE ACCOMPANIED BY LOCALLY HEAVY DOWNPOURS. THERE WILL BE MANY
AREAS OF STANDING WATER AS WELL AS STREET...HIGHWAY...AND
BASEMENT FLOODING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROADeWAY.
THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY.
VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED IMMEDIATELY.
MOVE TO HIGHER GROUND.

 ES

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, Jun 9, 9:00 PM EDT, 2 hours 50 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE NEW YORK NY
845 PM EDT FRI JUN 9 1989

...PLEASE DO NOT USE AFTER 10 PM EDT...

A THUNDERSTORM COMPLEX PRODUCING VERY HEAVY DOWNPOURS...FREQUENT
LIGHTNING AND GUSTY WINDS WAS LOCATED OVER THE CITY OF PHILADELPHIA
NORTHEAST ACROSS MONTGOMERY AND BUCKS COUNTIES IN SOUTHEAST PENNSYLVANIA
AND CAMDEN...BURLINGTON AND MERCER COUNTIES IN SOUTHWEST NEW JERSEY.

THIS COMPLEX WILL BE MOVING INTO HUNTERDON...SOMERSET...MIDDLESEX AND
MONMOUTH COUNTIES BY 930 PM AND PROBABLY REACH THE REMAINDER OF NORTHERN
NEW JERSEY AND NEW YORK CITY BY AROUND 10 PM.

TORRENTIAL DOWNPOURS...FREQUENT LIGHTNING AND URBAN AND HIGHWAY FLOODING
IS LIKELY WITH THE PASSAGE OF THESE STORMS.

ELSEWHERE A THUNDERSTORM WITH HEAVY RAIN WAS LOCATED ON THE WARREN/
MONROE COUNTY BORDER.

HEAVY RAIN WAS ALREADY IN PROGRESS RIGHT AROUND NEW YORK CITY
AND SHOULD MOVE INTO BERGEN...ROCKLAND AND WESTCHESTER COUNTIES
SHORTLY.

PATCHY LIGHT RAIN WAS OCCURRING OVER UPSTATE NEW YORK AND NORTHERN
CONNECTICUT.

THUNDERSTORMS WERE MOVING NORTHNORTHEAST AT 30 MILES AN HOUR.

GIGI
Special weather statement, Jun 9, 9:48 PM EDT, 2 hours 2 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE NEW YORK NY
935 PM EDT FRI JUN 9 1989

...PLEASE DO NOT USE AFTER 11 PM EDT...

A THUNDERSTORM COMPLEX PRODUCING TORRENTIAL DOWNPOURS AND FREQUENT
LIGHTNING WAS LOCATED FROM THE FIVE BOROUGHS OF NEW YORK CITY SOUTHWEST
ACROSS SOUTHERN BERGEN...HUDSON...ESSEX...UNION...SOMERSET...MIDDLESEX
AND MONMOUTH COUNTIES IN NORTHERN NEW JERSEY.

THIS COMPLEX WILL BE MOVING INTO THE REMAINDER OF BERGEN COUNTY AS WELL
AS SOUTHEAST PASSAIC COUNTY BY 10 PM...THIS COMPLEX WILL ALSO REACH
NASSAU...ROCKLAND AND WESTCHESTER COUNTIES BY 1100 PM.

TORRENTIAL DOWNPOURS...URBAN AND HIGHWAY FLOODING WILL OCCUR WITH THE
PASSAGE OF THESE STORMS.  MOTORISTS SHOULD BE WARY OF PONDING OF WATER
IN LOW-LYING AND FLOOD PRONE AREAS ESPECIALLY WHILE TRAVELING THROUGH
UNDERPASSES.

ANOTHER THUNDERSTORM WITH HEAVY RAIN WAS LOCATED OVER NORTHERN
WESTCHESTER COUNTY.

PATCHY LIGHT RAIN WAS OCCURRING! OVER UPSTATE NEW YORK...SOUTHWEST
CONNECTICUT AND OVER THE EASTERN THIRD OF PENNSYLVANIA.

THUNDERSTORMS WERE MOVING NORTHEAST AT 35 MILES AN HOUR.

GIGI
Special weather statement, Jun 9, 10:45 PM EDT, 1 hour 5 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE NEW YORK NY
1035 PM EDT FRI JUN 9 1989

...PLEASE DO NOT USE AFTER 12 MIDNIGHT EDT...

A THUNDERSTORM WITH VERY HEAVY RAIN AND FREQUENT CLOUD TO GROUND
LIGHTNING WAS OVER MERCER COUNTY IN CENTRAL NEW JERSEY.  THIS STORM
SHOULD PASS THROUGH MIDDLESEX AND MONMOUTH COUNTIES DURING THE NEXT
HOUR.

MEANWHILE...A THUNDERSTORM COMPLEX PRODUCING VERY HEAVY RAIN WAS LOCATED
FROM EXTREME SOUTHWEST FAIRFIELD COUNTY AND WESTCHESTER COUNTY SOUTH
ACROSS NEW YORK CITY...NASSAU COUNTY AND HUDSON COUNTY NEW JERSEY.

THIS COMPLEX WILL MOVE THROUGH THE WESTERN TWO THIRDS OF SUFFOLK
COUNTY AS WELL AS MOST OF FAIRFIELD COUNTY CONNECTICUT BY MIDNIGHT.

TORRENTIAL DOWNPOURS...URBAN AND HIGHWAY FLOODING WILL OCCUR WITH THE
PASSAGE OF THESE STORMS.  MOTORISTS SHOULD BE WARY OF PONDING OF WATER
IN LOW-LYING AND FLOOD PRONE AREAS.

OTHER LIGHT RAIN AND SHOWERS WERE OCCURRING OVER NORTHEAS>T
PENNSYLVANIA...WESTERN CONNECTICUT AND NORTHWARD ALONG THE
HUDSON RIVER VALLEY FROM PUTNAM COUNTY TO ALBANY.

THUNDERSTORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR.

GIGI
Special weather statement, Jun 9, 11:42 PM EDT, 8 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE NEW YORK NY
1135 PM EDT FRI JUN 9 1989

...PLEASE DO NOT USE AFTER 1 AM EDT...

A PAIR OF THUNDERSTORMS CONTAINING HEAVY RAIN AND FREQUENT CLOUD TO
GROUND LIGHTNING WERE IN PROGRESS OVER CRANBURY AND PERTH AMBOY BOTH
IN MIDDLESEX COUNTY.  THESE STORMS SHOULD PASS THROUGH NORTHERN SECTIONS
OF MONMOUTH COUNTY AS WELL AS THE BOROUGHS OF STATEN ISLAND...QUEENS
AND BROOKLYN DURING THE NEXT HOUR.

A THUNDERSTORM COMPLEX CONTAINING VERY HEAVY RAIN WAS LOCATED OVER THE
WESTERN HALF OF SUFFOLK COUNTY...MOST OF NASSAU COUNTY AND THE WESTERN
HALF OF LONG ISLAND SOUND.  THIS COMPLEX SHOULD PASS ALONG COASTAL
NEW HAVEN COUNTY AS WELL AS MOST OF THE REMAINDER OF SUFFOLK COUNTY
BY 1 AM.

OTHER THUNDERSTORMS WERE IN PROGRESS IN NORTHEAST ESSEX COUNTY AND
ALONG THE DELAWARE RIVER BORDERING WARREN COUNTY.

OTHER LIGHT RAIN AND SHOWERS WERE OCCURRING OVER THE CATSKILLS...
THE SUSQUEHANNA REGION OF UPSTATE NEW YORK...THE WESTERN HALF OF
CONNECTICUT AND EXTREME WESTERN MASSACHUSETTS.

ALL PERSONS SHOULD BE CAUTIOUS WHEN DRIVING IN FLOOD-PRONE AREAS.
PLEASE BE WARY OF PONDING OF WATER ALONG ROADWAYS AND ESPECIALLY
WHEN TRAVEL]ING THROUGH UNDERPASSES.

THUNDERSTORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR.

GIGI

Nearby

Flash Flood Warnings in New York, 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.