Alert archive / Ohio / Flash Flood Warnings in 1998

Flash Flood Warning 6, NWS Wilmington, OH

January 7, 1998Hocking County, Ohio

NWS Wilmington, OH issued this flash flood warning at Jan 7, 1998, 10:35 PM EST for Hocking County, Ohio. It was in force for 115 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jan 7, 1998, 10:35 PM EST (03:35 UTC)
Expired
Jan 8, 1998, 12:30 AM EST
In force
115 min
Issued by
NWS Wilmington, OH
Area
Whole counties

County Hocking County, OH

The radar

The Cincinnati radar (KILN), 116 km from the middle of the area, began a volume at 03:36 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 3.6 hours before the alert went out and 114 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, Cncnati-Daytn, OH at 00:00Z on 1998-01-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 35 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, Cncnati-Daytn, OH at 00:00Z on 1998-01-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 142 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
35 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
526 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
142 m²/s²
0-3 km storm-relative helicity
126 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 KILN 080337
FFWILN
OHC073-080530-

BULLETIN
FLOOD WARNING
NATIONAL WEATHER SERVICE WILMINGTON OH
1035 PM EST WED JAN 7 1998

THE NATIONAL WEATHER SERVICE IN WILMINGTON OH HAS ISSUED A
FLOOD WARNING FOR SMALL STREAMS EFFECTIVE UNTIL 1230 AM EST
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN CENTRAL OHIO

   ...HOCKING COUNTY
 
AN ESTIMATED ONE AND A HALF TO TWO AND A HALF INCHES OF RAIN HAS
FALLEN ACROSS HOCKING COUNTY. LOCAL LAW ENFORCEMENT OFFICIALS HAVE
REPORTED SEVERAL ROADS CLOSED DUE TO HIGH WATER AND STREAMS OUT OF
THEIR BANKS. THE HEAVIEST RAIN HAS MOVED OUT OF HOCKING COUNTY AND
ONLY SCATTERED SHOWERS CAN BE EXPECTED THROUGH THE OVERNIGHT
HOURS. ADDITIONAL RAINFALL AMOUNTS OF LESS THAN HALF AN INCH CAN BE
EXPECTED. THE FLOODING CONDITIONS SHOULD SLOWLY SUBSIDE DURING THE
OVERNIGHT HOURS.
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLASH FLOODING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THtE
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.

KELLS

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.

NWS Wilmington, OH wrote its last area forecast discussion before this flash flood warning went out at Jan 7, 8:25 PM EST, 2 hours 10 minutes earlier.

Area forecast discussion, Jan 7, 8:25 PM EST, 2 hours 10 minutes before
FORECAST COORDINATION MESSAGE
NATIONAL WEATHER SERVICE WILMINGTON OH
825 PM EST WED JAN 7 1998

AREA RADARS SHWG PCPN STARTING TO TAPER OFF SOME ACRS WRN PORTIONS FA AS
MINOR DRY SLOT TRIES TO WORK IN FM THE SW. STILL SCT SHWRS ACRS WRN FA
THO AND PCPN APPEARS TO BE REDVLPG BACK TO THE SW. MDT TO OCNLY HVY RA
CONTG ACRS ERN FA WITH IR SAT PIX INDICTG COOLING CLOUD TOPS PAST CPL
HRS. NOT A WHOLE LOT OF FLOODING PBLMS SO FAR WITH MAINLY JUST SOME LOW-
LYING AND MINOR STREET FLOODING. HOWEVER...WITH ANOTHER CPL OF HRS OF
GOOD RAIN...WL HAV TO WATCH FOR ADDITIONAL FLOODING PROBLEMS ACRS ERN
FA. WITH MID LVLS DRYING OUT SOME...SHUD SEE THREAT FOR WDSPRD HVY RAIN
END THRU THIS EVNG BUT WITH PDS OF RAIN XPCTD TO CONT WL NOT TAKE MUCH
FOR ADDITIONAL FLOODING. FLOOD WATCH MARGINAL ACRS WRN PORTIONS OF
FA...ESPCLY LIMA AREA...BUT FOR NOW PRBLY BEST TO LEAVE UP.

TMPS RANGING FM NEAR 40 LIMA AREA TO NEAR 60 PMH. SFC BNDRY CRNTLY XTNDG
FM LOW OVR N CNTRL TN TO JUST S OF CVG AND THEN UP TO ARND CMH. BNDRY
HAS BEEN SAGGING SLOWLY S WITH WNDS PICKING UP BEHIND IT. WITH BNDRY
SAGGING S...TMPS LIKELY TO DRP OFF SOME MORE AND LOWS IN MID 40S MAY
WORK BETTER FOR CVG/CMH AREA AND LOW 40S DAY.

LOTT

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 7, 8:20 PM ESTFlash Flood WarningILNHocking2 hr
Jan 7, 8:50 PM ESTFlash Flood WarningILNPike100 min

Nearby

Flash Flood Warnings in Ohio, 1998Every flash flood warning in 1998

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; radar from the NEXRAD Level II archive.