Alert archive / Pennsylvania / Flash Flood Warnings in 1989

Flash Flood Warning 41, NWS Cleveland, OH

June 27, 1989Mercer County, Pennsylvania

NWS Cleveland, OH issued this flash flood warning at Jun 27, 1989, 3:40 PM EDT for Mercer County, Pennsylvania. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Jun 27, 1989, 3:40 PM EDT (19:40 UTC)
Expired
Jun 27, 1989, 7:00 PM EDT
In force
3 hr
Issued by
NWS Cleveland, OH
Area
Whole counties

County Mercer 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

Pittsburgh, PA (KPIT), launched 12:00Z, 7.7 hours before the alert went out and 100 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, Pittsburgh, PA at 12:00Z on 1989-06-27Temperature 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, Pittsburgh, PA at 12:00Z on 1989-06-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
NaN m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
65 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 KPIT 271942
FFWYNG
PAC085-272300-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE YOUNGSTOWN OH
ISSUED BY PITTSBURGH PA
340 PM EDT TUE JUN 27 1989
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  700 PM EDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN NORTHWEST PENNSYLVANIA
          ...MERCER
 
THUNDERSTORMS CONTINUE TO TRACK ACROSS MERCER COUNTY PRODUCING HEAVY
RAINS. RADAR ESTIMATES THAT UP TO TWO INCHES OF RAIN HAS FALLEN IN THE
PAST HOUR AND A HALF.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT.  IT'S
IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR
CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS.  CAMP-ERS SHOULD
AVOID CAMPING ALONG STREAMS OR CREEKS DURING THREATENING RAINS.

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, Jun 27, 1:25 PM EDT, 2 hours 15 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE YOUNGSTOWN OH
125 PM EDT TUE JUNE 27 1989

SHOWERS AND THUNDERSTORMS DEVELOPED RAPIDLY ACROSS OHIO IN THE PAST
HOUR.  THE STORMS WERE MOVING EAST AT 25 MPH.

THERE IS A POTENTIAL OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING
WITH THUNDERSTORMS CONTAINING HEAVY RAIN... DAMAGING WINDS AND HAIL.
PEOPLE IN EASTERN OHIO AND WESTERN PENNSYLVANIA SHOULD KEEP A CLOSE
WATCH ON THE WEATHER AND BE PREPARED TO TAKE COVER SHOULD THREATENING
WEATHER DEVELOP.

A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 9 PM EDT FOR TRUMBULL...
MAHONING AND COLUMBIANA COUNTIES IN EASTERN OHIO AND LAWRENCE AND MERCER
COUNTIES IN WESTERN PENNSYLVANIA.

DOXEY 

                                                                             [
Special weather statement, Jun 27, 1:45 PM EDT, 1 hour 55 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MANSFIELD OH
145 PM EDT TUE JUN 27 1989

AT 140 PM EDT MARBLE SIZE HAIL WAS REPORTED OVER NORTHERN MARION
COUNTY. THE THUNDERSTORM THAT PRODUCED THE HAIL WAS MOVING NORTHEAST
AT 25 MPH AND WILL MOVE ACROSS CRAWFORD COUNTY BEWTEEN 145 PM AND
215 PM EDT.

THESE THUNDERSTORMS ARE CAPABLE OF PRODUCING DAMAGING WINDS...LARGE
HAIL AND HEAVY DOWNPOUR.S AS THEY MOVE OVERHEAD.

IF THREATENING WEATHER APPROACHES SEEK SHELTER.

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 9 PM EDT.

BANYAS
Special weather statement, Jun 27, 1:56 PM EDT, 1 hour 44 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
155 PM EDT TUE JUN 27 1989

A SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT FOR THE SOUTHEAST
TWO-THIRDS OF OHIO UNTIL 9 PM EDT.

THE WATCH INCLUDES ALL OF OHIO EAST OF A SANDUSKY-CINCINNATI LINE. A
SEVERE THUNDERSTORM WARNING IS IN EFFECT UNTIL 230 PM FOR MERCER COUNTY
IN WEST-CENTRAL OHIO.

AT 140 PM EDT RADAR SHOWED WIDESPREAD THUNDERSTORM ACTIVITY ACROSS
NORTHERN OHIO AND MORE SCATTERED ACTIVITY IN THE SOUTHERN PART OF THE
STATE. THE HEAVIEST THUNDERSTORMS WERE JUST SOUTHWEST OF CLEVELAND IN
MEDINA COUNTY... IN WESTERN HURON COUNTY AND IN SOUTHWEST ASHTABULA
COUNTY.

IN SENECA COUNTY BETWEEN 1 PM AND 130 PM THE TOWN OF COOPER RECEIVED
1.40 INCHES OF RAIN IN 25 MINUTES. HALF INCH HAIL WAS REPORTED IN
BURTON ALONG WITH .60 INCHES OF RAIN.

THE THUNDERSTORMS WERE CONTINUING TO MOVE TO THE NORTHEAST AT ABOUT 25
TO 30 MILES PER HOUR. PEOPLE THROUGEHOUT THE EASTERN AREAS OF THE STATE
SHOULD MONITOR WEATHER CONDITIONS CLOSELY THIS AFTERNOON AND EVENING.
FURTHER STATEMENTS AND POSSIBLE WARNINGS WILL BE ISSUED BY THE WEATHER
SERVICE DURING THIS PERIOD.
DEB
Special weather statement, Jun 27, 2:05 PM EDT, 1 hour 35 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ERIE, PA
155 PM EDT TUE JUN 27 1989

...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT INTO THIS EVENING FOR...
...ALL OF NORTHWEST PENNSYLVANIA...

...AT 150 PM EDT RADAR SHOWED A BROKEN LINE OF THUNDERSTORMS THAT
STRETCHED FROM SOUTHEASTERN MKCEAN COUNTY IN NORTHWEST PENNSYLVANIA...
SOUTHWEST ACROSS ELK AND INTO SOUTHEASTERN VENANGO COUNTY.
ANOTHER BROKEN LINE OF THUNDERSTORMS EXTENDED SOUTHWEST FROM THE
OHIO BORDER...JUST WEST OF LINESVILLE IN CRAWFORD COUNTY...TO SOUTH OF
CLEVELAND OHIO. AS THESE STORMS MOVED THROUGH GEAUGA COUNTY IN NORTHEAST
OHIO ONE HALF IN HAIL WAS REPORTED.

THESE THUNDERSTORMS WILL BE AFFECTING CRAWFORD...EASTERN MKEAN...ELK...
POTTER AND EASTERN VENANGO COUNTIES IN NORTHWEST PENNSYLVANIA FOR THE NEXT
COUPLE OF HOURS.

SOME OF THESE STORMS WILL PRODUCE DANGEROUS LIGHTNING...STRONG GUSTY WINDS
HEAVY DOWNPOURS AND LARGE HAIL.

PARRISH/PAONE
Special weather statement, Jun 27, 3:24 PM EDT, 16 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TOLEDO OH
323 PM EDT TUE JUN 27 1989

A THUNDERSTORM WITH VERY HEAVY RAIN WAS OVER WYANDOT COUNTY.

AT 320 PM EDT WEATHER SERVICE RADAR INDICATED A HEAVY THUNDERSTORM NEAR
UPPER SANDUSKY IN WYANDOT COUNTY.  WYANDOT COUNTY SHERIFF REPORTED VERY
HEAVY RAINS AND SMALL HAIL AT TIMES.  THE THUNDERSTORM WAS MOVING EAST
AROUND 30 MPH.

A SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT UNTIL 9PM EDT.  IF
THREATENING WEATHER APPROACHES SEEK SHELTER.

ELH
Special weather statement, Jun 27, 3:28 PM EDT, 12 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE YOUNGSTOWN OH
330 PM EDT TUE JUNE 27 1989

AT 325 PM EDT A THUNDERSTORM WITH HEAVY RAIN... STRONG WINDS AND
INTENSE LIGHTNING WAS REPORTED AROUND THE LAKE MILTON AREA IN WESTERN
MAHONING COUNTY.

NUMEROUS THUNDERSTORMS CONTINUE TO DEVELOP ACROSS EASTERN OHIO AND
WESTERN PENNSYLVANIA.  THESE STORMS WERE MOVING EAST AT 25 MPH.    .

PEOPLE IN EASTERN OHIO AND WESTERN PENNSYLVANIA SHOULD KEEP A CLOSE
WATCH ON THE WEATHER AND BE PREPARED TO TAKE COVER SHOULD THREATENING
WEATHER DEVELOP.

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 9 PM EDT.

DOXEY

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 27, 1:56 PM EDTSevere Thunderstorm WarningCLELawrence49 min
Jun 27, 2:28 PM EDTSevere Thunderstorm WarningCLEPotter62 min
Jun 27, 2:39 PM EDTTornado WarningCLEMercer36 min
Jun 27, 2:46 PM EDTSevere Thunderstorm WarningCLECrawford59 min
Jun 27, 3:06 PM EDTSevere Thunderstorm WarningCLEVenango69 min
Jun 27, 3:17 PM EDTTornado WarningCLEMercer28 min
Jun 27, 3:21 PM EDTFlash Flood WarningCLEVenango4 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.