Alert archive / Ohio / Flash Flood Warnings in 1990

Flash Flood Warning 33, NWS Wilmington, OH

July 21, 1990Auglaize County, Mercer County, Ohio

NWS Wilmington, OH issued this flash flood warning at Jul 21, 1990, 10:43 PM EDT for Auglaize County, Mercer County, Ohio. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Jul 21, 1990, 10:43 PM EDT (02:43 UTC)
Expired: Jul 22, 1990, 1:45 AM EDT
In force: 3 hr
Issued by: NWS Wilmington, OH
Area: Whole counties

Counties Auglaize County, OH, Mercer 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 00:00Z, 2.7 hours before the alert went out and 75 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 870 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 800 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: 9 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 220243
FFWDAY
OHC011-107-220545-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
URBAN AND SMALL STREAM FLOOD WARNING 
NATIONAL WEATHER SERVICE DAYTON OH
1043 PM EDT SAT JUL 21 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A URBAN AND SMALL 
STREAM FLOOD WARNING EFFECTIVE UNTIL 145 AM EDT FOR PEOPLE IN 
THE FOLLOWING COUNTIES

   IN THE STATE OF OHIO
      AUGLAIZE...MERCER

AT 1040 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED NEARLY
STATIONARY SHOWERS AND THUNDERSTORMS OVER EASTERN MERCER COUNTY
...AND NORTHERN AND CENTRAL AUGLAIZE COUNTIES IN WESTERN OHIO.

THE SHERIFFS DEPARTMENTS IN BOTH MERCER AND AUGLAIZE COUNTIES
WERE REPORTING HIGH WATER ON NUMEROUS ROADS AT 1035 PM EDT.
SOME STREET FLOODING WAS ALSO REPORTED IN CELINA.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE 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 IMMEDIATELY.
MOVE TO HIGHER GROUND.

 HARLEY

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, Jul 21, 9:46 PM EDT, 57 minutes before

OHZ005-010-220400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DAYTON OH
945 PM EDT SAT JUL 21 1990

AT 940 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED SHOWERS AND
THUNDERSTORMS WITH HEAVY RAIN ACROSS NORTHEAST MERCER COUNTY...
NORTHERN AUGLAIZE COUNTY...AND SOUTHERN ALLEN COUNTY OF WESTERN OHIO.

THE SHOWERS AND THUNDERSTORMS HAD MOVED VERY LITTLE SINCE 830 PM EDT.
AS A RESULT SOME LOCALLY HEAVY RAIN HAS FALLEN SINCE 830 PM EDT...
MAINLY IN A NARROW BAND FROM MENDON IN NORTHEAST MERCER COUNTY TO
CRIDERSVILLE IN NORTH CENTRAL AUGLAIZE COUNTY.

THE RAIN HAS CAUSED SOME PONDING OF WATER ON ROADS IN NORTHERN AUGLAIZE
COUNTY...AND SOME WATER WAS ALSO REPORTED ON A FEW ROADS IN NORTHEAST
MERCER COUNTY.

THE RAIN WILL GRADUALLY DECREASE IN INTENSITY AND SHOULD END OVER MOST
SECTIONS OF WEST CENTRAL OHIO BETWEEN 11 PM EDT AND MIDNIGHT.
.
REMEMBER TO NEVER TRY TO DRIVE ACROSS A WATER COVERED ROAD. THE
WATER MAY BE DEEPER THAN YOU' THINK.

HARLEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 1:46 AM EDT	Flash Flood Warning	ILN	Auglaize, Mercer	119 min
Jul 22, 3:50 AM EDT	Flash Flood Warning	ILN	Allen, Auglaize, Van Wert	3 hr
Jul 22, 3:50 AM EDT	Flash Flood Warning	ILN	Mercer	3 hr
Jul 22, 8:41 AM EDT	Flash Flood Warning	ILN	Van Wert	3 hr

Nearby

Flash Flood Warnings in Ohio, 1990 Every 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.