Alert archive / Ohio / Flash Flood Warnings in 1997

Flash Flood Warning 80, NWS Wilmington, OH

June 9, 1997Hamilton County, Ohio

NWS Wilmington, OH issued this flash flood warning at Jun 9, 1997, 2:50 AM EDT for Hamilton County, Ohio. It was in force for 3 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 9, 1997, 2:50 AM EDT (06:50 UTC)
Expired: Jun 9, 1997, 6:00 AM EDT
In force: 3 hr
Issued by: NWS Wilmington, OH
Area: Whole counties

County Hamilton County, OH

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 6.8 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 722 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: -11 m²/s²
0-3 km storm-relative helicity: 50 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 090650
FFWILN
OHC061-091000-

BULLETIN
FLOOD WARNING
NATIONAL WEATHER SERVICE WILMINGTON OH
250 AM EDT MON JUN 9 1997

THE NATIONAL WEATHER SERVICE IN WILMINGTON OH HAS ISSUED A
FLOOD WARNING FOR URBAN AREAS AND SMALL STREAMS EFFECTIVE UNTIL 600
AM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHWESTERN OHIO

   ...HAMILTON COUNTY
 
AT 248 AM EDT NATIONAL WEATHER SERVICE RADAR INDICATED THAT AREAS
OF MODERATE TO HEAVY RAINFALL WERE MOVING BACK INTO HAMILTON
COUNTY.  THIS RAINFALL WILL PRODUCE ANOTHER 1 INCH OF RAIN THROUGH
DAYBREAK IN SOME AREAS.  REPORTS FROM THE CINCINNATI POLICE
DEPARTMENT AND HAMILTON COUNTY SHERRIFF INDICATE THAT SOME ROADS
WERE CLOSED DUE TO HIGH WATER.  THE ADDITIONAL HEAVY RAINFALL WILL
PRODUCE ADDITIONAL FLOODING OF CREEKS AND STREAMS.
 
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.

WILKINSON

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 9, 2:41 AM EDT, 9 minutes earlier.

Area forecast discussion, Jun 9, 2:41 AM EDT, 9 minutes before

FORECAST COORDINATION MESSAGE
NATIONAL WEATHER SERVICE WILMINGTON OH
240 AM EDT MON JUN 9 1997

04Z SFC ANALYSIS INDICATED A WK LOW OVR CNTRL TN WITH A TROF EXTENDING
NWD TOWARD THE OH RIVER.  WV IMAGERY SHOWED A VORT CENTER OVR SWRN IN.
ETA MODEL DATA SHOWS H8 VORTICITY OVR SRN IN AT 06Z AND SHIFTS IT TO VC
CVG BY 12Z. BELIEVE H8 FEATURE IS FOCUSING THE PRECIP ATTM.  MODELS
SUGGEST HEAVIER PRECIP WL SHIFT SLOWLY EWD TOWARD PSM AREA.  LATEST
KILN 88D IMAGES SHOW HEAVIER +RA MOVG BACK TOWARD CVG AREA.  SEVERAL
ROADS WERE FLOODED IN HAMILTON COUNTY AND THIS +RA SHOULD MAKE
CONDITIONS WORSE. RIGHT NOW LEANING TOWARD A FLOOD WATCH FOR HAMILTON
CO OH ONLY FOR THE EARLY MORNING HOURS.  WL NEED TO WORD PRECIP IN THE S
AS MAINLY IN THE MORNING SINCE A FEW -SHRA OR SPRINKLES SHOULD LINGER
INTO THE PM HOURS.

FURTHER N...THE AREA JUST S OF DAY-CMH MAY HAVE A FEW EARLY AM SHRA BUT
SKIES SHOULD BEGIN TO CLEAR BY THE PM.  FM DAY-CMH NWD WL NEED CDY
EARLY WITH BECMG P/C BY THE PM.  LOOKS LIKE A NICE DAY VC LIMA.

SKIES SHOULD START CLEARING OVERNIGHT TO THE N OF THE OH RIVER BUT WITH
ELY SFC FLOW MAY WANT TO HOLD ONTO P/C TONIGHT AND MON VC CVG.

CVG 66/58/77 611
DAY 71/57/80 200
CMH 74/55/81 100

WILKINSON

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 9, 12:30 AM EDT	Flash Flood Warning	ILN	Hamilton	3 hr

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.