Alert archive / Ohio / Flash Flood Warnings in 1998

Flash Flood Warning 41, NWS Wilmington, OH

May 7, 1998Clark County, Ohio

NWS Wilmington, OH issued this flash flood warning at May 7, 1998, 10:07 PM EDT for Clark 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
May 7, 1998, 10:07 PM EDT (02:07 UTC)
Expired
May 8, 1998, 1:15 AM EDT
In force
3 hr
Issued by
NWS Wilmington, OH
Area
Whole counties

County Clark County, OH

The radar

The Cincinnati radar (KILN), 55 km from the middle of the area, began a volume at 02:07 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, 2.1 hours before the alert went out and 54 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 1998-05-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 224 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 1998-05-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 190 square meters per square second.193958Sfc1 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
224 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
556 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
190 m²/s²
0-3 km storm-relative helicity
202 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KILN 080209
FFWILN
OHC023-080510-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE WILMINGTON OH
1007 PM EDT THU MAY 7 1998

THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CLARK COUNTY IN WEST CENTRAL OHIO.
  
* EFFECTIVE UNTIL 115 AM EDT.

* HEAVY RAINS CONTINUE TO FALL ACROSS CLARK COUNTY. DOPPLER RADAR
ESTIMATES INDICATE THREE AND A HALF INCHES OF RAIN HAVE FALLEN
SINCE 6 PM ACROSS MUCH OF CENTRAL AND NORTHERN CLARK COUNTY.

* LOCAL LAW ENFORCEMENT OFFICIALS REPORT NUMEROUS FLOODING
PROBLEMS ACROSS CENTRAL CLARK COUNTY AND THIS WILL ONLY WORSEN WITH
ADDITIONAL RAINFALL.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED...
ACT QUICKLY.

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 May 7, 9:45 PM EDT, 22 minutes earlier.

Area forecast discussion, May 7, 9:45 PM EDT, 22 minutes before
FORECAST COORDINATION MESSAGE
NATIONAL WEATHER SERVICE WILMINGTON OH
945 PM EDT THU MAY 7 1998

LTST SFC ANLYS SHWG LOW STILL OVR CNTL IND WITH WRM FNT XTNDG E ACRS
CNTRL OH. GOOD LLVL DIR SHEAR ALG BNDRY HELPING TO PRODUCE ROTATING
STRMS. REMNANTS OF ERLYR GREENE CNTY STORM HAS WKND BUT STILL PRDCG
PRETTY GUD RAIN. PCPN HAS BEEN PINWHEELING OVR CLARK CNTY WITH 3 HR
TOTALS OF ARND 2 INCHS NEAR SPRINGFIELD. WL HAV TO KEEP AN EYE ON
THINGS THERE. PDS OF RAIN TO CONT ELSEWHR ACRS FA OVRNGT AND CRNT
FCST IN PRETTY GOOD SHAPE.

LOTT

In the hours before

Special weather statement, May 7, 9:13 PM EDT, 54 minutes before
OHZ062-080125-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
913 PM EDT THU MAY 7 1998

...THE TORNADO WARNING FOR GREENE COUNTY HAS EXPIRED...

THE THUNDERSTORM THAT PRODUCED THE TORNADO IN GREENE COUNTY HAS
WEEKEND AND MOVED OUT OF GREENE COUNTY. A LARGE TREE WAS RIPPED
OUT OF THE GROUND. ALSO...A HOLE RIPPED IN THE ROOF OF ONE HOUSE
WHILE SOME SIDING WAS TORN OFF THE SIDE OF A NEIGHBORING HOME.
THE DAMAGE OCCURRED AROUND 835 PM.

INNES/LOTT
Special weather statement, May 7, 9:13 PM EDT, 54 minutes before
OHZ062-080125-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
913 PM EDT THU MAY 7 1998

...THE TORNADO WARNING FOR GREENE COUNTY HAS EXPIRED...

THE THUNDERSTORM THAT PRODUCED THE TORNADO IN GREENE COUNTY HAS
WEEKEND AND MOVED OUT OF GREENE COUNTY. A LARGE TREE WAS RIPPED
OUT OF THE GROUND. ALSO...A HOLE RIPPED IN THE ROOF OF ONE HOUSE
WHILE SOME SIDING WAS TORN OFF THE SIDE OF A NEIGHBORING HOME.
THE DAMAGE OCCURRED AROUND 835 PM.

INNES/LOTT
Local storm report, May 7, 9:44 PM EDT, 23 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OHIO
944 PM EDT THU MAY 07 1998

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0939 PM    SPRINGFIELD               OH   FLOODING
05/07/98   CLARK                          FLOODING OF BASEMENTS AND
                                          FIELDS.

KELLS
Local storm report, May 7, 9:44 PM EDT, 23 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OHIO
944 PM EDT THU MAY 07 1998

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0939 PM    SPRINGFIELD               OH   FLOODING
05/07/98   CLARK                          FLOODING OF BASEMENTS AND
                                          FIELDS.

KELLS
Local storm report, May 7, 10:02 PM EDT, 5 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OHIO
1002 PM EDT THU MAY 07 1998

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0835 PM    XENIA                     OH   TORNADO
05/07/98   GREENE                         TORNADO DAMAGED A ROOF AND
                                          RIPPED OFF SIDING FROM A
                                          HOUSE. IT KNOCKED DOWN A
                                          BIG TREE AND OTHER TREES
                                          WERE BENT OVER.

0836 PM    XENIA                     OH   TORNADO
05/07/98   GREENE                         XENIA POLICE SPOT TORNADO
                                          ON THE EAST END OF TOWN.

KELLS
Local storm report, May 7, 10:02 PM EDT, 5 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OHIO
1002 PM EDT THU MAY 07 1998

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0835 PM    XENIA                     OH   TORNADO
05/07/98   GREENE                         TORNADO DAMAGED A ROOF AND
                                          RIPPED OFF SIDING FROM A
                                          HOUSE. IT KNOCKED DOWN A
                                          BIG TREE AND OTHER TREES
                                          WERE BENT OVER.

0836 PM    XENIA                     OH   TORNADO
05/07/98   GREENE                         XENIA POLICE SPOT TORNADO
                                          ON THE EAST END OF TOWN.

KELLS

The office that day

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

IssuedProductOfficeCountiesLasted
May 7, 8:15 PM EDTTornado WarningILNGreene50 min
May 7, 9:02 PM EDTFlash Flood WarningILNClark2 hr
May 7, 9:59 PM EDTFlash Flood WarningILNGreene2 hr

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.