Alert archive / Ohio / Flash Flood Warnings in 1990

Flash Flood Warning 75, NWS Wilmington, OH

December 30, 1990Greene County, Ohio

NWS Wilmington, OH issued this flash flood warning at Dec 30, 1990, 4:08 PM EST for Greene County, Ohio. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Dec 30, 1990, 4:08 PM EST (21:08 UTC)
Expired
Dec 30, 1990, 8:15 PM EST
In force
4 hr
Issued by
NWS Wilmington, OH
Area
Whole counties

County Greene 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, 9.1 hours before the alert went out and 35 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 1990-12-30Temperature 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, Dayton/James M C, OH at 12:00Z on 1990-12-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 167 square meters per square second.19395878Sfc1 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
535 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
167 m²/s²
0-3 km storm-relative helicity
337 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 KDAY 302112
FFWDAY
OHC003-011-021-023-037-057-065-091-107-109-113-135-149-161-310115-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SMALL STREAM FLOOD WARNING
NATIONAL WEATHER SERVICE DAYTON OH
408 PM EST SUN DEC 30 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SMALL
STREAM FLOOD WARNING EFFECTIVE UNTIL 815 PM EST FOR PEOPLE IN
THE FOLLOWING COUNTIES

   IN THE STATE OF OHIO
      ALLEN...AUGLAIZE...CHAMPAIGN...CLARK...DARKE...GREENE...
      HARDIN...LOGAN...MERCER...MIAMI...MONTGOMERY...PREBLE...
      SHELBY...VAN WERT

AT 4 PM FLOODING CONTINUES ACROSS WEST CENTRAL OHIO AND THE
MIAMI VALLEY. ALTHOUGH THE RAIN HAS DECREASED WE STILL HAVE
TO CONTEND WITH THE RUNOFF AND THIS WILL CONTINUE TO KEEP THE
SMALL STREAM AND CREEKS ALONG WITH RIVERS OUT OF THEIR BANKS
FOR MOST OF THE NIGHT.

WE HAVE HAD TWO INCHES AND EIGHT THREE HUNDREDS (2.83) INCHES
AT THE AIRPORT SINCE MIDNIGHT AS OF 330 PM.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
THE DANGERS OF FLOOD WATERS.  IF FLASH FLOODING IS OBSERVED...
ACT QUICKLY.  MOVE TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO
NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

JDD

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 18 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 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, 4:28 PM ESTFlash Flood WarningILNBrown3 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.