Alert archive / Ohio / Flash Flood Warnings in 1998

Flash Flood Warning 5, NWS Wilmington, OH

January 7, 1998Pike County, Ohio

NWS Wilmington, OH issued this flash flood warning at Jan 7, 1998, 8:50 PM EST for Pike County, Ohio. It was in force for 100 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, 8:50 PM EST (01:50 UTC)
Expired
Jan 7, 1998, 10:30 PM EST
In force
100 min
Issued by
NWS Wilmington, OH
Area
Whole counties

County Pike County, OH

The radar

The Cincinnati radar (KILN), 75 km from the middle of the area, began a volume at 01:51 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, 1.8 hours before the alert went out and 74 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 KCVG 080152
FFWILN
OHC131-080330-

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

THE NATIONAL WEATHER SERVICE IN WILMINGTON OH HAS ISSUED A
FLOOD WARNING FOR SMALL STREAMS EFFECTIVE UNTIL 1030 PM EST
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTH CENTRAL OHIO

   ...PIKE COUNTY

AS OF 830 PM...CLOSE TO TWO INCHES OF RAIN HAD FALLEN ACROSS PARTS OF
PIKE COUNTY. LOCAL LAW ENFORCEMENT OFFICIALS CONTINUE TO REPORT STREAMS
AND CREEKS NEAR BANKFULL AND SOME ROADWAYS COVERED WITH WATER IN LOW
LYING AREAS. 

THE STEADY RAIN IS EXPECTED TO DECREASE IN INTENSITY THROUGH THE REST
OF THE EVENING BUT ANY ADDITIONAL RAIN WILL CAUSE FLOODING OF LOW LYING
AREAS AND STREAMS. THUS...THE FLOOD WARNING FOR SMALL STREAMS HAS BEEN
EXTENDED UNTIL 1030 PM EST.

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
QUICKLY.  MOVE TO HIGHER GROUND.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLASH FLOODING.

LOTT

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, 25 minutes earlier.

Area forecast discussion, Jan 7, 8:25 PM EST, 25 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, 10:35 PM ESTFlash Flood WarningILNHocking115 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.