Alert archive / New York / Flash Flood Warnings in 1989

Flash Flood Warning 7, NWS Buffalo, NY

June 20, 1989Allegany County, Cattaraugus County, Chautauqua County, New York

NWS Buffalo, NY issued this flash flood warning at Jun 20, 1989, 11:45 AM EDT for Allegany County, Cattaraugus County, Chautauqua County, New York. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Jun 20, 1989, 11:45 AM EDT (15:45 UTC)
Expired
Jun 20, 1989, 3:00 PM EDT
In force
3 hr
Issued by
NWS Buffalo, NY
Area
Whole counties

Counties Allegany County, NY, Cattaraugus County, NY, Chautauqua 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

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 3.8 hours before the alert went out and 73 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, Buffalo Intl Airport, NY at 12:00Z on 1989-06-20Temperature 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, Buffalo Intl Airport, NY at 12:00Z on 1989-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 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
804 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
-3 m²/s²
0-3 km storm-relative helicity
97 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 KBUF 201545
FFWBUF
NYC003-009-013-029-063-073-201900-

BULLETIN  IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
1145 AM EDT TUE JUN 20 1989

THE NATIONAL WEATHER SERVICE HAS EXPANDED THE FLOOD WARNING EFFECTIVE
UNTIL 3 PM EDT FOR PEOPLE IN THE FOLLOWING NEW YORK COUNTIES...

    ERIE    NIAGARA   AND ORLEANS

AND NOW TO INCLUDE...

    CHAUTAUQUA   CATTARAUGUS   AND  ALLEGANY

AT 11 AM RAINFALL OF 1.71 INCHES WAS REPORTED AT GETZVILLE NEW YORK
NORTHEAST OF BUFFALO.  IN THE WESTFIELD AND MAYVILLE AREA OVER ONE AND A
THIRD INCHES OF RAIN HAS FALLEN SINCE MIDNIGHT.  RADAR HAS SHOWN
MODERATE TO HEAVY RAIN HAS PERSISTED FROM NORTHEAST OF ERIE PENNSYLVANIA
TO BUFFALO AND EAST OF NIAGARA FALLS...AND ALSO ACROSS THE HEADWATERS OF
THE GENESEE RIVER BASIN UPSTREAM FROM WELLSVILLE.

ADDITIONAL HEAVY RAINFALL IS POSSIBLE ACROSS THE AREA INTO THIS
AFTERNOON.

THE GENESEE RIVER AT WELLSVILLE IS EXPECTED TO CREST AROUND MIDAFTERNOON
CLOSE TO ITS FLOOD STAGE OF 10 FEET.

REMEMEMBER...WATER ON ROADS CAN BE VERY DECEPTIVE.  UNDERPASSES CAN
FILL QUICKLY.  DO NOT TRY TO DRIVE THROUGH FLOODED AREAS.

A FLOOD WARNING MEANS FLOODING IS IMMINENT OR HAS BEEN REPORTED.
TAKE PRECA_UTIONS TO PROTECT LIFE AND PROPERTY.

DUNHAM

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 20, 11:20 AM EDTFlash Flood WarningBUFErie, Niagara, Orleans4 hr
Jun 20, 3:15 PM EDTFlash Flood WarningBUFAllegany, Cattaraugus3 hr
Jun 20, 3:15 PM EDTFlash Flood WarningBUFChautauqua3 hr
Jun 20, 3:45 PM EDTFlash Flood WarningBUFOrleans2 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.