Alert archive / Ohio / Flash Flood Warnings in 1990

Flash Flood Warning 43, NWS Wilmington, OH

August 21, 1990Butler County, Hamilton County, Warren County, Ohio

NWS Wilmington, OH issued this flash flood warning at Aug 21, 1990, 4:46 PM EDT for Butler County, Hamilton County, Warren County, Ohio. It was in force for 119 min.

The area

The counties it named.

The facts

Issued
Aug 21, 1990, 4:46 PM EDT (20:46 UTC)
Expired
Aug 21, 1990, 6:45 PM EDT
In force
119 min
Issued by
NWS Wilmington, OH
Area
Whole counties

Counties Butler County, OH, Hamilton County, OH, Warren County, OH

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

Dayton/James M C, OH (KDAY), launched 12:00Z, 8.8 hours before the alert went out and 64 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, Dayton/James M C, OH at 12:00Z on 1990-08-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 38 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, Dayton/James M C, OH at 12:00Z on 1990-08-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 89 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
38 J/kg
Mixed-layer CIN
-113 J/kg
Mixed-layer LCL
635 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
89 m²/s²
0-3 km storm-relative helicity
102 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 KCVG 212047
FFWCVG
OHC017-061-165-212245-
 
BULLETIN - EBS ACTIVATION REQUESTED
SMALL STREAM AND URBAN FLOOD WARNING
NATIONAL WEATHER SERVICE CINCINNATI OH
446 PM EDT TUE AUG 21 1990
 
THE NATIONAL WEATHER SERVICE IN CINCINNATI HAS ISSUED A
SMALL STREAM AND URBAN FLOOD WARNING EFFECTIVE UNTIL  645 PM EDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN SOUTHWEST OHIO
          ...BUTLER...HAMILTON...WARREN
 
AT 430 PM AMERATURE RADIO OPERATORS REPORTED 2.2 INCHES OF RAIN FELL
IN 50 MINUTES IN THE MIDDLETOWN AREA OF EASTERN BUTLER COUNTY.
 
WATER WAS ALSO REPORTED 3 TO 4 INCHES DEEP ON ROUTE 4.
 
THESE THUNDERSTORMS WERE MOVING EAST AND HAVE SLOWED TO A MOVEMENT OF
15 MILES AN HOUR.
 
 
DO NOT DRIVE YOUR VERHICLE INTO AREAS WHERE THE 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 QUICKLY.  MOVE TO HIGHER GROUND.
 
MANUEL

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 21, 3:43 PM EDT, 1 hour 3 minutes before
OHZ008-INZ013-KYZ005-212045-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CINCINNATI OH
342 PM EDT TUE AUG 21 1990

A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR SOUTHEAST INDIANA...
SOUTHWEST OHIO AND NORTHERN KENTUCKY UNTIL 9 PM EDT.

AT 330 PM EDT...SHOWERS AND THUNDERSTORMS...SOME OF THEM WITH VERY
HEAVY RAIN...WERE OCCURRING OVER PARTS OF SOUTHEAST INDIANA...
SOUTHWEST OHIO AND NORTHERN AND CENTRAL KENTUCKY.

THE SHOWERS AND THUNDERSTORMS WERE SPREAD FROM JUST NORTH OF MUNCIE
INDIANA...SOUTHEAST TO NEAR LAKE CUMBERLAND KENTUCKY...IN AN AREA
ABOUT 160 MILES WIDE.  THEY WERE MOVING EAST AT 25 MILES AN HOUR.

THESE THUNDERSTORMS ARE CAPABLE OF PRODUCING HEAVY RAIN...STRONG
WINDS...SMALL HAIL AND FREQUENT LIGHTNING.  STAY TUNED TO YOUR
FAVORITE RADIO STATION OR NOAA WEATHER RADIO FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.
<
A FLOOD WATCH IS ALSO IN EFFECT FOR SOUTHWEST OHIO FOR TONIGHT.

GOLDEN

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 21, 12:35 AM EDTFlash Flood WarningILNGreene, Montgomery3 hr
Aug 21, 3:07 AM EDTFlash Flood WarningILNRichland3 hr
Aug 21, 7:15 PM EDTFlash Flood WarningILNDarke3 hr

Nearby

Flash 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.