Alert archive / New York / Flash Flood Warnings in 1989

Flash Flood Warning 2, NWS New York, NY

May 16, 1989Suffolk County, New York

NWS New York, NY issued this flash flood warning at May 16, 1989, 1:45 PM EDT for Suffolk County, New York. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
May 16, 1989, 1:45 PM EDT (17:45 UTC)
Expired
May 16, 1989, 4:00 PM EDT
In force
2 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 12:00Z, 5.8 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 12:00Z on 1989-05-16Temperature 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 12:00Z on 1989-05-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 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
1341 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
28 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 161748
FFWNYC
NYC103-162000-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
145 PM EDT TUE MAY 16 1989

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLOOD WARNING
EFFECTIVE UNTIL 400 PM EDT FOR PEOPLE IN THE FOLLOWING
COUNTIES

   IN THE STATE OF NEW YORK
      WESTERN SUFFOLK

HEAVY RAIN HAS BEEN FALLING FOR SEVERAL HOURS OVER WESTERN SUFFOLK
COUNTY. WE HAVE RECEIVED AN UNOFFICIAL REPORT OF 3.25 INCHES AT BABYLON
AND 2.0 INCHES AT LAKE RONKONKOMA. LOCALIZED SEVERE FLOODING OF ROADWAYS
AND LOW LYING AREAS WILL OCCUR.  UNDERPASSES ARE ESPECIALLY VULNERABLE
TO FLOODING.  SMALL STREAMS IN WESTERN SUFFOLK COUNTY MAY ALSO OVERFLOW
THIS AFTERNOON.
DO NOT DRIVE YOUfR VEHICLE INTO AREAS WHERE 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 IMMEDIATELY.
MOVE TO HIGHER GROUND.

SDT

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, May 16, 10:46 AM EDT, 2 hours 59 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEWARK NJ
1045 AM EDT TUE MAY 16 1989

...FLOOD WATCH IN EFFECT TODAY FOR SMALL STREAMS IN NORTHERN NEW
JERSEY...

LOW PRESSURE SYSTEM OVER DELMARVA IS MOVING SLOWLY NORTHWARD ALONG
THE COAST.

RAIN BEGAN FALLING AT NEWARK THIS MORNING AT 415 AM AND AS OF 1000
AM HAS DEPOSITED ONE AND A QUARTER INCHES. MANY LOCATIONS THROUGHOUT
THE NORTHERN SECTIONS OF NEW JERSEY HAVE RECEIVED BETWEEN ONE AND
ONE AND A HALF INCHES OF RAIN MAINLY IN LOCAL DOWNPOURS ASSOCIATED
WITH EMBEDDED THUNDERSTORMS. COOPERATIVE LOCAL OBSERVERS HAVE
REPORTED HOURLY RAINFALL AMOUNTS OF ONE HALF TO THREE QUARTERS OF AN
INCH. THEY ALSO REPORT THAT MANY OF THE SMALL STREAMS AND CREEKS ARE
EXTREMELY CLOSE TO BANKFULL.

RADAR INDICATES ANOTHER BAND OF MODERATE TO HEAVY RAIN MOVING ACROSS
THE STATE.  THERE ARE SOME THUNDERSTORMS LOCATED WITHIN THIS AREA.
WITH THE SOIL SATURATED AND A HIGH PROBABILITY OF ADDITIONAL RAINFALL
ACROSS THE NORTHERN PART OF THE STATE..MANY AREAS IN THE VICINITY

OF SMALL STREAMS AND CREEKS COULD EXPERIENCE PROBLEMS BEFORE DAYS
END.

THERE IS WIDESPREAD FLOODING OF STREETS AND LOW LYING AREAS -WITH
ENTRANCES TO MANY ROADWAYS BLOCKED. MAJOR ARTERIES THROUGHOUT THE
STATE REPORT EXTENSIVE DELAYS. MOTORISTS SHOULD EXERCISE EXTREME
CAUTION AND ALLOW EXTRA TIME FOR ANY TRAVEL. PERSONS IN FLOOD PRONE
AREAS SHOULD BE ON THE ALERT FOR RAPIDLY RISING WATERS AND AVOID ALL
FLOODED LOW LYING AREAS. THEY SHOULD ALSO BE PREPARED TO TAKE QUICK
ACTION IF A WARNING IS ISSUED OR FLOODING IS OBSERVED.

STAY TUNED TO NOAA WEATHER RADIO AND COMMERCIAL RADIO AND TELEVISION
FOR THE LATEST WEATHER INFORMATION...AS WELL AS POSSIBLE WARNINGS.
REMEMBER TO FOLLOW ANY INSTRUCTIONS OF EMERGENCY MANAGEMENT
PERSONNEL. THE NEXT STATEMENT WILL BE ISSUED AT 1 PM EDT.

HGW/GH

The office that day

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

IssuedProductOfficeCountiesLasted
May 16, 12:44 PM EDTFlash Flood WarningOKXRockland, Westchester3 hr

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.