Alert archive / Pennsylvania / Flash Flood Warnings in 1989

Flash Flood Warning 29, NWS Cleveland, OH

June 20, 1989Cameron County, Pennsylvania

NWS Cleveland, OH issued this flash flood warning at Jun 20, 1989, 7:38 PM EDT for Cameron County, Pennsylvania. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued
Jun 20, 1989, 7:38 PM EDT (23:38 UTC)
Expired
Jun 21, 1989, 12:45 AM EDT
In force
5 hr
Issued by
NWS Cleveland, OH
Area
Whole counties

County Cameron County, PA

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, 11.6 hours before the alert went out and 171 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 KERI 202338
FFWERI
PAC023-210445-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
FLASH FLOOD WARNING 
NATIONAL WEATHER SERVICE ERIE PA
738 PM EDT TUE JUN 20 1989

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING 
EFFECTIVE UNTIL 1245 AM EDT FOR PEOPLE IN THE FOLLOWING COUNTY

   IN THE NORTHWEST PART OF PENNSYLVANIA
      CAMERON

THE STATE POLICE IN EMPORIUM HAS REPORTED SOME FLOODING ALONG
ROUTE 120 IN WESTERN CAMERON COUNTY.

DO NOT DRIVE YOUR 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.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
THE DANGERS OF FLOOD WATERS.  IF FLASH FLOODING IS OBSERVED...
ACT QUICKLY.  MOVE TO HIGHER GROUND TO ESCAPE FLOOD WATERS.  DO
NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

The office that day

Everything else NWS Cleveland, OH issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 20, 12:16 PM EDTFlash Flood WarningCLEElk4 hr
Jun 20, 2:08 PM EDTFlash Flood WarningCLEForest, Venango2 hr
Jun 20, 4:13 PM EDTFlash Flood WarningCLEElk, Forest, McKean, Warren4 hr
Jun 20, 4:13 PM EDTFlash Flood WarningCLEVenango4 hr
Jun 20, 7:08 PM EDTFlash Flood WarningCLEPotter5 hr

Nearby

Flash Flood Warnings in Pennsylvania, 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.