Alert archive / Pennsylvania / Flash Flood Warnings in 1991
Flash Flood Warning 4, NWS Cleveland, OH
NWS Cleveland, OH issued this flash flood warning at Apr 28, 1991, 8:20 PM EDT for McKean County, Pennsylvania. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Apr 28, 1991, 8:20 PM EDT (00:20 UTC)
- Expired
- Apr 28, 1991, 11:15 PM EDT
- In force
- 3 hr
- Issued by
- NWS Cleveland, OH
- Area
- Whole counties
County McKean County, PA
The nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 0.3 hours before the alert went out and 125 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.
- Mixed-layer CAPE
- 3 J/kg
- Mixed-layer CIN
- -376 J/kg
- Mixed-layer LCL
- 1161 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 101 m²/s²
- 0-3 km storm-relative helicity
- 142 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KERI 290020
FFWERI
PAC083-290315-
BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ERIE PA
820 PM EDT SUN APR 28 1991
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 1115 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTY
IN THE NORTHWEST PART OF PENNSYLVANIA
MCKEAN
AT 815 PM EDT THIS SUNDAY EVENING WEATHER SERVICE RADAR CONTINUED
O INDICATE STRONG THUNDERSTORMS CONTAINING HEAVY DOWNPOURS THAT
WERE SLOWLY MOVING ACROSS MOST OF MCKEAN COUNTY.
FLOODING OF BASEMENTS AND ROADS HAS BEEN REPORTED IN SMETHPORT.
BECAUSE OF THE SLOW MOVEMENT OF THESE STORMS THE THREAT OF FLOODING
WILL CONTINUE THROUGH THE EVENING HOURS.
A FLASH FLOOD WARNING MEANS FLOODING IS OCCURRING OR IS IMMINENT.
MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO
CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY.
NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT.
TO ESCAPE RISING WATER MOVE TO HIGHER GROUND.
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 ABBANDONED IMMEDIATELY.
MOVE TO HIGHER GROUND.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, Apr 28, 6:18 PM EDT, 2 hours 2 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ERIE, PA 614 PM EDT SUN APR 28 1991 ...AN AREA OF SLOW MOVING THUNDERSTORMS AND RAINSHOWERS CONTINUE TO MOVE ACROSS NORTHERN AND CENTRAL MCKEAN COUNTY. THESE THUNDERSTORMS ARE LOCATED NORTH AND SOUTH OF THE CITY OF BRADFORD AND STRETCH AS FAR SOUTH TO THE COMMUNITIES OF KANE..MT.JEWETT AND LUDLOW. THESE STROMS WERE MOVING VERY SLOWLY DURING THE PAST HOUR AND HALF. PERSONS LIVING NEAR POOR DRAINAGE AREAS..SMALL STREAMS AND CREEKS SHOULD BE ON THE ALERT FOR RISING WATERS. THESE THUNDERSTORMS IN ADDITION TO HAVING POSSIBLY HEAVY DOWNPOURS COULD ALSO CONTAIN SOME SMALL HAIL AND DANGEROUS LIGHTNING. DO NOT DRIVE YOUR CAR THROUGH FLOODED ROADWAYS AND BEWARE OF DEBRIS AND MUDSLIDES. WSO ERIE/FPW
Special weather statement, Apr 28, 6:20 PM EDT, 2 hours before
PAZ083-105-290000 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ERIE, PA 620 PM EDT SUN APR 28 1991 ...AN AREA OF SLOW MOVING THUNDERSTORMS AND RAINSHOWERS CONTINUE TO MOVE ACROSS NORTHERN AND CENTRAL MCKEAN COUNTY. THESE THUNDERSTORMS ARE LOCATED NORTH AND SOUTH OF THE CITY OF BRADFORD AND STRETCH AS FAR SOUTH TO THE COMMUNITIES OF KANE..MT.JEWETT AND LUDLOW. THESE STROMS WERE MOVING VERY SLOWLY DURING THE PAST HOUR AND HALF. PERSONS LIVING NEAR POOR DRAINAGE AREAS..SMALL STREAMS AND CREEKS SHOULD BE ON THE ALERT FOR RISING WATERS. THESE THUNDERSTORMS IN ADDITION TO HAVING POSSIBLY HEAVY DOWNPOURS COULD ALSO CONTAIN SOME SMALL HAIL AND DANGEROUS LIGHTNING. DO NOT DRIVE YOUR CAR THROUGH FLOODED ROADWAYS AND BEWARE OF DEBRIS AND MUDSLIDES. WSO ERIE/FPW/TJP
Special weather statement, Apr 28, 6:46 PM EDT, 1 hour 34 minutes before
OHZ002-003-004-282345- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CLEVELAND OHIO 646 PM EDT SUN APR 28 1991 AN AREA OF SLOW MOVING THUNDERSTORM CONTINUE TO DEVELOP OVER NORTHEASTERN OHIO. AT 640 PM EDT AN AREA OF INTENSE SLOW MOVING THUNDERSTORMS WERE OVER EASTERN CUYAHOGA... NORTHERN SUMMIT AND EASTERN GEAUGA COUNTIES. CONTINUED HEAVY DOWNPOURS CAN BE EXPECTED WITH THESE STORMS AS THEY MOVE OVER GEAUGA COUNTY. MOTORISTS SHOULD USE EXTRA CAUTION WHERE DRAINAGE IS POOR AND PONDING OF WATER MAY OCCUR. THESE STORMS MAY PRODUCE DANGEROUS LIGHTNING AND GUSTY WINDS. JOHNSON
Special weather statement, Apr 28, 7:24 PM EDT, 56 minutes before
OHZ002-003-290025- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CLEVELAND OHIO 725 PM EDT SUN APR 28 1991 A CLUSTER OF THUNDERSTORMS CONTINUE TO MOVE VERY SLOWLY NORTHEAST ACROSS GEAUGA COUNTY THIS EVENING. AT 715 PM EDT AN INTENSE SLOW MOVING THUNDERSTORM WAS BETWEEN SOLON AND BAINBRIDGE MOVING NORTHEAST AT AROUND 5 MPH. AT 705 PM EDT A SKYWARN OBSERVER ESTIMATED ONE-QUARTER TO ONE-HALF INCH OF RAINFALL IN FIFTEEN MINUTES IN SOLON. CONTINUED HEAVY DOWNPOURS CAN BE EXPECTED WITH THESE STORMS AS THEY MOVE OVER GEAUGA AND LAKE COUNTIES. MOTORISTS SHOULD USE EXTRA CAUTION WHERE DRAINAGE IS POOR AND PONDING OF WATER MAY OCCUR. THIS STORM MAY PRODUCE DANGEROUS LIGHTNING... GUSTY WINDS AND SMALL HAIL. JOHNSON
The office that day
Everything else NWS Cleveland, OH issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 12:20 AM EDT | Severe Thunderstorm Warning | CLE | Crawford | 55 min |
Nearby
Flash Flood Warnings in Pennsylvania, 1991Every flash flood warning in 1991
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.