Alert archive / Kentucky / Flash Flood Warnings in 1990

Flash Flood Warning 77, NWS Wilmington, OH

December 30, 1990Mason County, Kentucky; Brown County, Ohio

NWS Wilmington, OH issued this flash flood warning at Dec 30, 1990, 4:28 PM EST for Mason County, Kentucky; Brown County, Ohio. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Dec 30, 1990, 4:28 PM EST (21:28 UTC)
Expired
Dec 30, 1990, 7:30 PM EST
In force
3 hr
Issued by
NWS Wilmington, OH
Area
Whole counties

Counties Mason County, KY, Brown 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

Huntington/Tri S, WV (KHTS), launched 12:00Z, 9.5 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.

Skew-T log-pSkew-T log-p diagram, Huntington/Tri S, WV 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 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Huntington/Tri S, WV at 12:00Z on 1990-12-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 482 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
NaN m above ground
0-6 km bulk shear
68 kt
0-1 km storm-relative helicity
482 m²/s²
0-3 km storm-relative helicity
463 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 302133 COR
FFWCVG
KYC015-081-161-187-OHC015-310030-

BULLETIN - EBS ACTIVATION REQUESTED
URBAN FLOOD WARNING...CORRECTION...
NATIONAL WEATHER SERVICE CINCINNATI OH
432 PM EST SUN DEC 30 1990

THE NATIONAL WEATHER SERVICE IN CINCINNATI HAS ISSUED A
URBAN FLOOD WARNING EFFECTIVE UNTIL  730 PM EST
FOR PEOPLE IN THE FOLLOWING COUNTIES...

IN NORTH KENTUCKY
          ...BOONE...GRANT...MASON...OWEN
IN SOUTHWEST OHIO
          ...BROWN

AT 420 PM EST THE COUNTY SHERIFFS REPORTED STREETS WERE BEGINNING TO
BE COVERED BY WATER. NATIONAL WEATHER SERVICE RADAR SHOWED RAIN
COVERING MOST OF SOUTHWEST OHIO AND ALL OF NORTHERN KENTUCKY. THE RAIN
WILL REMAIN IN THE AREA FOR AT LEAST TWO MORE HOURS. THE WATER WILL
LIKELY RISE ON STREETS AND COULD CAUSE BASEMENT FLOODING.

DO NOT DRIVE YOUR VEHICLE 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.
JN
CORRECTED TO DROP SMALL STREAM

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, 12:50 PM EST, 3 hours 38 minutes before
OHZ008-INZ013-KYZ005-302000-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE CINCINNATI OHIO
1250 PM EST SUN DEC 30 1990

...FLOOD WATCH FOR NORTHERN KENTUCKY TODAY...
...WINTER WEATHER ADVISORIES FOR ALL OF THE TRI STATE FOR THIS AFTERNOON
AND EARLY EVENING...

A FLOOD WATCH REMAINS IN EFFECT FOR NORTHERN KENTUCKY THIS AFTERNOON.
ALSO A WINTER WEATHER ADVISORY IS IN EFFECT FOR THE ENTIRE TRI STATE
THROUGH EARLY THIS EVENING.

AT 1230 PM RAIN CONTINUED ACROSS MOST OF SOUTHWEST OHIO...ALL OF
NORTHERN KENTUCKY AND PORTIONS OF SOUTHEAST INDIANA. FREEZING RAIN WAS
FALLING OVER WESTERN INDIANA THROUGH ILLINOIS.

RAIN WILL CHANGE TO FREEZING RAIN AND SLEET LATE THIS AFTERNOON ACROSS
THE AREA AS TEMPERATURES FALL.
RAIN FALLING ACROSS THE ENTIRE AREA WILL CAUSE STREAMS AND CREEKS TO
POSSIBLY BECOME BANKFULL. PEOPLE LIVING NEAR FLOOD PRONE AREAS SHOULD
STAY ALERT TO RISING WATER LEVELS.

STAY TUNED TO NOAA WEATHER RA}DIO AS CHANGING WEATHER MAY REQUIRE FURTHER
WARNINGS OR ADVISORIES CONCERNING RAIN...FREEZING RAIN...SLEET OR SNOW.

KEENEY

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 30, 4:28 PM ESTFlash Flood WarningILNBoone, Grant, Owen3 hr
Dec 29, 9:14 PM ESTFlash Flood WarningILNMercer, Van Wert3 hr
Dec 29, 9:36 PM ESTFlash Flood WarningILNDarke3 hr
Dec 30, 12:01 AM ESTFlash Flood WarningILNAuglaize3 hr
Dec 30, 12:29 AM ESTFlash Flood WarningILNDarke, Mercer, Van Wert3 hr
Dec 30, 12:53 AM ESTFlash Flood WarningILNCrawford, Morrow, Richland4 hr
Dec 30, 12:53 AM ESTFlash Flood WarningILNAshland4 hr
Dec 30, 3:16 AM ESTFlash Flood WarningILNAuglaize, Darke, Mercer, Van Wert3 hr
Dec 30, 3:16 AM ESTFlash Flood WarningILNAllen, Hardin, Logan3 hr
Dec 30, 5:07 AM ESTFlash Flood WarningILNAshland, Richland3 hr
Dec 30, 5:07 AM ESTFlash Flood WarningILNCrawford, Morrow3 hr
Dec 30, 9:25 AM ESTFlash Flood WarningILNMorrow3 hr
Dec 30, 9:45 AM ESTFlash Flood WarningILNGreene, Montgomery3 hr
Dec 30, 9:45 AM ESTFlash Flood WarningILNChampaign3 hr
Dec 30, 10:17 AM ESTFlash Flood WarningILNButler3 hr
Dec 30, 1:08 PM ESTFlash Flood WarningILNButler4 hr
Dec 30, 2:53 PM ESTFlash Flood WarningILNClinton, Warren4 hr
Dec 30, 3:16 PM ESTFlash Flood WarningILNHighland4 hr
Dec 30, 4:08 PM ESTFlash Flood WarningILNChampaign, Clark, Logan, Miami, Shelby4 hr
Dec 30, 4:08 PM ESTFlash Flood WarningILNAllen, Auglaize, Hardin4 hr
Dec 30, 4:08 PM ESTFlash Flood WarningILNDarke, Mercer, Van Wert4 hr
Dec 30, 4:08 PM ESTFlash Flood WarningILNMontgomery, Preble4 hr
Dec 30, 4:08 PM ESTFlash Flood WarningILNGreene4 hr

Nearby

Flash Flood Warnings in Kentucky, 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.