Alert archive / Ohio / Flash Flood Warnings in 1990

Flash Flood Warning 38, NWS Wilmington, OH

August 4, 1990Ashland County, Crawford County, Richland County, Ohio

NWS Wilmington, OH issued this flash flood warning at Aug 4, 1990, 10:46 PM EDT for Ashland County, Crawford County, Richland County, Ohio. It was in force for 119 min.

The area

The counties it named.

The facts

Issued
Aug 4, 1990, 10:46 PM EDT (02:46 UTC)
Expired
Aug 5, 1990, 12:45 AM EDT
In force
119 min
Issued by
NWS Wilmington, OH
Area
Whole counties

Counties Ashland County, OH, Crawford County, OH, Richland 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, 2.8 hours before the alert went out and 172 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 00:00Z on 1990-08-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1258 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 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 00:00Z on 1990-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 103 square meters per square second.193958Sfc1 km3 km6 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
1258 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
726 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
103 m²/s²
0-3 km storm-relative helicity
153 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KCLE 050244
FFWMFD
OHC005-033-139-050445-
 
BULLETIN - EBS ACTIVATION REQUESTED
SMALL STREAM AND URBAN FLOOD WARNING
NATIONAL WEATHER SERVICE MANSFIELD OH
ISSUED BY CLEVELAND OH
1046 PM EDT SAT AUG 4 1990
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A
SMALL STREAM AND URBAN FLOOD WARNING EFFECTIVE UNTIL 1245 AM EDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN NORTH CENTRAL OHIO
          ...ASHLAND...CRAWFORD...RICHLAND
 
AT 1030 PM EDT RADAR CONTINUED TO SHOW AN AREA OF HEAVY RAIN AND
THUNDERSTORMS FROM EAST OF BUCYRUS THROUGH MANSFIELD AND INTO
ASHLAND COUNTY. THIS AREA OF HEAVY RAIN HAS MOVED LITTLE BETWEEN
830 PM AND 1030 PM. THE RAIN AREA WAS SINKING SLOWLY SOUTH.
 
AS OF 1030 PM FLOODING OF LOW LYING AREAS IN ASHLAND WAS REPORTED
BY THE POLICE.
 
STREAMS WERE RISING RAPIDLY. THE HEAVY RAIN SHOULD END AROUND
MIDNIGHT.
 
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY.  THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CvAR TO
CROSS SAFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY.  MOVE TO HIGHER GROUND.

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 4, 9:01 PM EDT, 1 hour 45 minutes before
OHZ007-009-011-050200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE  COLUMBUS OH
859 PM EDT SAT AUG 4 1990

RAIN SHOWERS AND THUNDERSTORMS WITH BRIEF HEAVY RAIN MOVED INTO
CENTRAL OHIO THIS EVENING.

AT 855 PM NATIONAL WEATHER SERVICE RADAR SHOWED AN AREA OF RAIN
SHOWERS WITH ISOLATED THUNDERSTORMS COVERING MOST OF CENTRAL OHIO.
THIS AREA WAS MOVING EAST AT ABOUT 30 MPH.

SOME OF THESE THUNDERSTORMS MAY PRODUCE VERY HEAVY RAIN AND CAUSE
PONDING OF WATER IN LOW LYING AREAS. THE STORMS WILL MOVE OUT OF
THE COLUMBUS AREA BY 1030 PM.

MOTORISTS CAN EXPECT PERIODS OF BRIEF HEAVY RAINS TO CONTINUE OVER
CENTRAL OHIO FOR MOST OF THIS EVENING.

SMITH

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.