Alert archive / Pennsylvania / Flash Flood Warnings in 1993

Flash Flood Warning 22, NWS Cleveland, OH

August 27, 1993Forest County, Venango County, Pennsylvania

NWS Cleveland, OH issued this flash flood warning at Aug 27, 1993, 6:33 PM EDT for Forest County, Venango County, Pennsylvania. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Aug 27, 1993, 6:33 PM EDT (22:33 UTC)
Expired
Aug 27, 1993, 9:00 PM EDT
In force
2 hr
Issued by
NWS Cleveland, OH
Area
Whole counties

Counties Forest County, PA, Venango County, PA

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 10.6 hours before the alert went out and 176 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 1993-08-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 468 joules per kilogram.LCLLFCEL10008507005003002001001 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 1993-08-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 74 square meters per square second.1939Sfc1 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
468 J/kg
Mixed-layer CIN
-89 J/kg
Mixed-layer LCL
1220 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
74 m²/s²
0-3 km storm-relative helicity
77 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 272236
FFWERI
PAC053-121-280100-

BULLETIN - EBS ACTIVATION REQUESTED
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PITTSBURGH PA
633 PM EDT FRI AUG 27 1993

THE NATIONAL WEATHER SERVICE IN ERIE HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 900PM EDT
FOR THE FOLLOWING LOCATION...

IN WEST PENNSYLVANIA

 ...FOREST AND VENANGO COUNTIES

WEATHER SERVICE RADAR AT 630PM SHOWS AN AREA OF THUNDERSTORMS
LOCATED IN VENANGO AND FOREST COUNTIES MOVING VERY SLOWLY
EASTWARD AT 5 TO 10 MPH.
THESE STORMS WILL ALSO CONTAIN HEAVY DOWNPOURS THAT MAY CAUSE
FLOODING OF STREAMS...CREEKS AND ROADWAYS.
SEWER AND STREET FLOODING ARE A SURE BET.
THOSE OUTDOORS AND CAMPERS SHOULD BE MOVE TO HIGHER GROUND.

HEAVY RAINS FLOOD ROADS QUICKLY SO DON`T DRIVE INTO AREAS WHERE
WATER COVERS THE ROAD.

WSO/ERIE

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, Aug 27, 6:33 PM EDT, 0 minutes before
OHZ004-PAZ003-280000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE YOUNGSTOWN OH
633 PM EDT FRI AUG 27 1993

FLOOD WATCH FOR STREAMS AND CREEKS IN EFFECT UNTIL 10 PM EDT FOR MERCER
COUNTY IN WESTERN PENNSYLVANIA.

AT 628 PM EDT NATIONAL WEATHER SERVICE RADAR INDICATED STRONG
THUNDERSTORMS OVER PORTIONS OF NORTHEASTERN OHIO AND WESTERN
PENNSYLVANIA. THE STRONGEST STORM WAS LOCATED FIVE MILES NORTHEAST
OF THE CITY OF MERCER IN MERCER COUNTY PENNSYLVANIA. THIS STORM WAS
MOVING TO THE EAST AT 10 MPH AND WILL EXIT MERCER COUNTY BY 645 PM EDT.

OTHER SHOWERS AND THUNDERSTORMS WERE LOCATED OVER NORTHERN PORTIONS OF
MAHONING COUNTY IN NORTHEASTERN OHIO. THESE STORMS WERE ALSO MOVING EAST
AT 10 MPH. THESE STORMS WILL EXIT THE YOUNGSTOWN AREA BY 650 PM EDT.

THESE STORMS HAVE A HISTORY OF PRODUCING BRIEF HEAVY RAINS. FREQUENT
LIGHTNING...SMALL HAIL...WIND GUSTS TO 35 MPH AND BRIEF TORRENTIAL RAINS
ARE POSSIBLE AS THESE STORMS MOVE THROUGH THE AREA.

BE ON THE LOOK OUT FOR PONDING OF WATER ON ROADWAYS. DO NOT DRIVE INTO
STANDING WATER.

STAY TUNED TO YOUR LOCAL MEDIA OR NOAA WEATHER RADIO FOR FURTHER
UPDATES.

KUBINA

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 27, 5:38 PM EDTFlash Flood WarningCLEForest, Venango82 min
Aug 27, 5:38 PM EDTSevere Thunderstorm WarningCLEForest, Venango82 min
Aug 27, 6:36 PM EDTSevere Thunderstorm WarningCLEForest, Venango2 hr
Aug 27, 7:04 PM EDTSevere Thunderstorm WarningCLEMercer56 min

Nearby

Flash Flood Warnings in Pennsylvania, 1993Every flash flood warning in 1993

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.