Alert archive / Pennsylvania / Flash Flood Warnings in 1990

Flash Flood Warning 126, NWS Cleveland, OH

December 30, 1990Mercer County, Pennsylvania; Trumbull County, Ohio

NWS Cleveland, OH issued this flash flood warning at Dec 30, 1990, 2:54 PM EST for Mercer County, Pennsylvania; Trumbull County, Ohio. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Dec 30, 1990, 2:54 PM EST (19:54 UTC)
Expired
Dec 30, 1990, 7:00 PM EST
In force
4 hr
Issued by
NWS Cleveland, OH
Area
Whole counties

Counties Trumbull County, OH, 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

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 7.9 hours before the alert went out and 234 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 1990-12-30Temperature 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 km-30°-20°-10°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 1990-12-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 601 square meters per square second.1939587897Sfc1 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
536 m above ground
0-6 km bulk shear
88 kt
0-1 km storm-relative helicity
601 m²/s²
0-3 km storm-relative helicity
765 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 KYNG 301958
FFWYNG
OHC155-PAC085-310000-
 
BULLETIN - EBS ACTIVATION REQUESTED
SMALL STREAM AND URBAN FLOOD WARNING
NATIONAL WEATHER SERVICE YOUNGSTOWN OH
254 PM EST SUN DEC 30 1990
 
THE NATIONAL WEATHER SERVICE IN YOUNGSTOWN HAS EXTENDED THE
SMALL STREAM AND URBAN FLOOD WARNINGS UNTIL  700 PM EST
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN NORTHEAST OHIO
          ...TRUMBULL
IN NORTHWEST PENNSYLVANIA
          ...MERCER
 
SEVERAL ROADS ACROSS MERCER AND TRUMBULL COUNTIES ARE STILL REPORTING
FLOODED ROADWAYS. SMALL STREAMS AND CREEKS IN THESE COUNTIES ARE
RUNNING VERY HIGH.
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY.  THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TOp
CROSS SAFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY.  MOVE TO HIGHER GROUND.
 
SITES

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, Dec 30, 2:04 PM EST, 50 minutes before
OHZALL-302205-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
205 PM EST SUN DEC 30 1990

THE WINTER WEATHER ADVISORIES THAT ARE IN EFFECT FOR MUCH OF OHIO WILL
BE CANCELLED LATER THIS AFTERNOON.

RAIN CONTINUED TO FALL OVER ALMOST ALL OF OHIO EARLY THIS AFTERNOON.
THE COLD FRONT RESPONSIBLE FOR THE PRECIPITATION WAS MOVING SOUTHEAST
THROUGH SOUTHERN OHIO AND WILL BE ALONG THE OHIO RIVER BY EARLY THIS
EVENING.

COLD AIR WAS POURING INTO THE WESTERN PART OF THE STATE BEHIND THIS
FRONT...AND SHOULD CAUSE THE RAIN TO CHANGE OVER TO FREEZING RAIN IN
THE WEST LATE THIS AFTERNOON BEFORE TURNING TO SNOW THIS EVENING.

THE PRECIPITATION BEHIND THE COLD FRONT IS FAIRLY LIGHT...THOUGH...AND
ACCUMULATIONS OF FREEZING RAIN AND SNOW WILL LIKELY NOT BE AS MUCH AS
WAS PREVIOUSLY THOUGHT. SNOW AMOUNTS OF AN INCH OR LESS ARE LIKELY
THROUGH LATE THIS EVENING. BECAUSE OF THIS...THE WINTER WEATHER
ADVISORIES WILL BE DROPPED LATER THIS AFTERNOON.

PARTAIN

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 30, 10:37 AM ESTFlash Flood WarningCLEMercer4 hr
Dec 30, 12:56 PM ESTFlash Flood WarningCLELawrence2 hr
Dec 30, 1:40 PM ESTFlash Flood WarningCLEForest, McKean, Venango, Warren4 hr
Dec 30, 1:40 PM ESTFlash Flood WarningCLECrawford, Erie4 hr
Dec 29, 10:33 PM ESTFlash Flood WarningCLEHancock, Putnam3 hr
Dec 29, 10:33 PM ESTFlash Flood WarningCLESeneca, Wyandot3 hr
Dec 29, 10:33 PM ESTFlash Flood WarningCLESandusky3 hr
Dec 29, 11:35 PM ESTFlash Flood WarningCLEFulton, Lucas3 hr
Dec 30, 12:33 AM ESTFlash Flood WarningCLEErie, Huron, Lorain4 hr
Dec 30, 12:33 AM ESTFlash Flood WarningCLECuyahoga, Medina4 hr
Dec 30, 12:33 AM ESTFlash Flood WarningCLELake4 hr
Dec 30, 1:28 AM ESTFlash Flood WarningCLESummit, Wayne4 hr
Dec 30, 1:30 AM ESTFlash Flood WarningCLEOttawa, Sandusky, Wood3 hr
Dec 30, 1:30 AM ESTFlash Flood WarningCLEHancock, Henry, Putnam3 hr
Dec 30, 1:30 AM ESTFlash Flood WarningCLESeneca, Wyandot3 hr
Dec 30, 2:34 AM ESTFlash Flood WarningCLEFulton116 min
Dec 30, 2:40 AM ESTFlash Flood WarningCLEFulton110 min
Dec 30, 2:41 AM ESTFlash Flood WarningCLEAshtabula, Geauga4 hr
Dec 30, 2:45 AM ESTFlash Flood WarningCLEMonroe, Noble, Washington5 hr
Dec 30, 2:45 AM ESTFlash Flood WarningCLECarroll, Holmes, Stark, Tuscarawas, Wayne5 hr
Dec 30, 2:45 AM ESTFlash Flood WarningCLECoshocton, Guernsey5 hr
Dec 30, 2:45 AM ESTFlash Flood WarningCLEHarrison5 hr
Dec 30, 6:56 AM ESTFlash Flood WarningCLEErie, Huron, Lorain4 hr
Dec 30, 6:56 AM ESTFlash Flood WarningCLEAshtabula, Cuyahoga, Geauga, Lake4 hr
Dec 30, 6:56 AM ESTFlash Flood WarningCLEMedina4 hr
Dec 30, 10:03 AM ESTFlash Flood WarningCLECuyahoga, Geauga, Lake, Lorain, Medina4 hr
Dec 30, 10:03 AM ESTFlash Flood WarningCLEErie, Huron4 hr
Dec 30, 10:03 AM ESTFlash Flood WarningCLEAshtabula4 hr
Dec 30, 11:24 AM ESTFlash Flood WarningCLESandusky2 hr
Dec 30, 1:27 PM ESTFlash Flood WarningCLEErie, Huron, Lorain4 hr
Dec 30, 1:27 PM ESTFlash Flood WarningCLECuyahoga, Medina4 hr
Dec 30, 1:27 PM ESTFlash Flood WarningCLEAshtabula, Geauga, Lake4 hr
Dec 30, 1:47 PM ESTFlash Flood WarningCLESandusky118 min
Dec 30, 3:48 PM ESTFlash Flood WarningCLESandusky4 hr

Nearby

Flash Flood Warnings in Pennsylvania, 1990Flash Flood Warnings in Ohio, 1990Every flash flood warning in 1990

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.