Alert archive / Ohio / Flash Flood Warnings in 1997

Flash Flood Warning 84, NWS Wilmington, OH

June 18, 1997Hamilton County, Ohio

NWS Wilmington, OH issued this flash flood warning at Jun 18, 1997, 9:05 AM EDT for Hamilton County, Ohio. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 18, 1997, 9:05 AM EDT (13:05 UTC)
Expired: Jun 18, 1997, 11:05 AM EDT
In force: 2 hr
Issued by: NWS Wilmington, OH
Area: Whole counties

County Hamilton County, OH

The radar

The Cincinnati radar (KILN), 67 km from the middle of the area, began a volume at 13:04 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 12:00Z, 1.1 hours before the alert went out and 69 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: 521 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 531 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 62 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KILN 181306
FFWILN
OHC061-181505-

BULLETIN
FLOOD WARNING
NATIONAL WEATHER SERVICE WILMINGTON OH
905 AM EDT WED JUN 18 1997

THE NATIONAL WEATHER SERVICE IN WILMINGTON OH HAS ISSUED A
FLOOD WARNING FOR URBAN AREAS AND SMALL STREAMS EFFECTIVE UNTIL
1105 AM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHWESTERN OHIO

   ...HAMILTON COUNTY
 
AT 905 AM EDT...WEATHER SERVICE RADAR INDICATED THUNDERSTORMS
PRODUCING HEAVY DOWNPOURS IN SOUTHERN HAMILTON COUNTY OHIO FROM
ABOUT 1 INCH TO 1.25 INCHES OF RAINFALL IN THE PAST HOUR.

ADDITIONAL RAINFALL IS EXPECTED IN SOUTHERN HAMILTON
COUNTY...WHICH WILL LIKELY CREATE FLOODING OF LOW AREAS...AS WELL
AS CREEKS AND STREAMS.
 
DO NOT DRIVE YOUR VEHICLE INTO ARENAS 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.

DIAN

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 Jun 18, 2:55 AM EDT, 6 hours 10 minutes earlier.

Area forecast discussion, Jun 18, 2:55 AM EDT, 6 hours 10 minutes before

FORECAST COORDINATION MESSAGE
NATIONAL WEATHER SERVICE WILMINGTON OH
250 AM EDT WED JUN 18 1997

COMPLEX WX PICTURE THIS AM. MID/UPR VORT CENTER PUSHING INTO S IL AND
TWD ENE. ASSOCIATED SFC LO CENTERED NEAR EVV...AND WARM FRONT E OF
LOW LOCATED ALNG OH RVR. FARTHER N...OLD SFC BDNRY THAT PUSHED INTO
N OH TUE AM STILL LOCATED ACRS LIMA VCNTY.

PCPN WDSPRD ALNG AND N OF OH RVR THIS AM. HEAVIEST PCPN...ASSOCIATED
WITH LIFT JUST N OF WARM FRONT...CONCENTRATED IN BAND FRM CVG THRU ILN
TO JUST S OF CMH. THIS BAND LIFTG RATHER QUICKLY TWD THE NNE...AND...
XCEPT FOR LINGERING -SHRA JUST S OF CVG...NO PCPN ALNG/S OF OH RVR
INVOF CWA ATTM.

MID/UPR LVL SHTWV AND SFC-H8 LOW PROGGED TO TRACK THRU S SECTIONS OF
CWA TDA. FUTURE PCPN PTTN HARD TO NAIL DOWN. LIKELY POPS IN ORDER FOR
ALL AREAS. BAND OF HEAVIEST PCPN WL CONT TO PUSH TWD NNE THRU CNTL AND
INTO N SECTIONS OF CWA EARLY THIS AM...LIKELY WEAKENING AS IT MOVES
FARTHER AWAY FROM WARMFRNT. MEANWHILE...BAND OF SHRA/TSRA ASSOCIATED
WITH VORT MAX OVR W KY WL TRACK NE AND INTO S/SW SECTIONS OF CWA AFTER
DAYBREAK. ALSO...CONDITIONS WL REMAIN FAVORABLE FOR ADDL SHRA/TSRA TO
DEVELOP E OF LOW TRACK...ACRS S SECTIONS OF CWA...THRU THIS AM.
HOWEVER...PCPN MAY REMAIN MORE WDSPRD ALNG/N OF VORT/SFC-H8 LO
TRACK...AND HEAVIEST RAFL OVR WDSPRD AREA MAY OCCUR N OF OH
RVR...PERHAPS IN RICH-DAY-CMH CORRIDOR....TDA. ALSO...CUD BE ISOLD SVR
THIS AFTN WHERE SFC BASED INSTABILITY HIEST...ACRS S CNTL OH/N KY.

PCPN SHUD END BY EARLY AFTN ACRS THE W AND BY EARLY EVE ACRS THE E.
THEN...CLDS WL BREAK UP TONITE...AND CUD BE ANOTHER NIGHT OF WDSPRD
DENSE FG ACRS REGION.

THU...AFTER EARLY AM FG BECMG P/M SUNNY. AVN SUGGESTS CHC FOR PM
TSTM CNTJL/S PM AS WK IMPULSE PUSHES THRU AREA...BUT FEATURE NOT
EVIDENT ON NGM/ETA AND PREFER TO LEAVE CURRNT DRY FCST AS IS FOR NOW.

CVG 77/63/84 702
DAY 75/61/83 901
CMH 76/62/85 801

ROWLEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 9:36 AM EDT	Flash Flood Warning	ILN	Warren	2 hr
Jun 18, 10:47 AM EDT	Flash Flood Warning	ILN	Clermont	118 min
Jun 18, 11:43 AM EDT	Flash Flood Warning	ILN	Fairfield, Licking	92 min
Jun 18, 1:15 PM EDT	Flash Flood Warning	ILN	Licking	90 min

Nearby

Flash Flood Warnings in Ohio, 1997 Every flash flood warning in 1997

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.