Alert archive / Ohio / Flash Flood Warnings in 1998

Flash Flood Warning 112, NWS Wilmington, OH

July 22, 1998Mercer County, Ohio

NWS Wilmington, OH issued this flash flood warning at Jul 22, 1998, 8:08 PM EDT for Mercer County, Ohio. It was in force for 117 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: Jul 22, 1998, 8:08 PM EDT (00:08 UTC)
Expired: Jul 22, 1998, 10:05 PM EDT
In force: 117 min
Issued by: NWS Wilmington, OH
Area: Whole counties

County Mercer County, OH

The radar

The Northern Indiana radar (KIWX), 128 km from the middle of the area, began a volume at 00:11 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, 0.1 hours before the alert went out and 142 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: 3091 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 945 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 61 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 5.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KILN 230009 RRA
FFWILN
OHC107-230205-

BULLETIN
FLOOD WARNING
NATIONAL WEATHER SERVICE WILMINGTON OH
808 PM EDT WED JUL 22 1998

THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A

* FLOOD WARNING FOR URBAN AREAS AND SMALL STREAMS FOR...
  MERCER COUNTY IN WEST CENTRAL OHIO.

* EFFECTIVE UNTIL 1005 PM EDT.

*AT 800 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED
THUNDERSTORMS WITH VERY HEAVY DOWNPOURS AND WIND GUSTS EXCEEDING 40
MPH MOVING FROM WEST TO EAST ACROSS MERCER COUNTY.

*RADAR ESTIMATED THAT THESE THUNDERSTORMS WERE PRODUCING ONE TO TWO
INCHES OF RAIN PER HOUR. BECAUSE THE GROUND IS SATURATED FROM
HEAVY RAIN THAT HAS FALLEN DURING THE PAST 24 HOURS...HEAVY
DOWNPOURS WERE ALREADY STARTING TO FLOOD AREA ROADS THIS EVENING.

*THUNDERSTORMS WILL PRODUCE ANOTHER ONE TO TWO INCHES OF RAIN
WITHIN THE COUNTY BY 10 PM...AND THIS ADDITIONAL HEAVY RAINFALL
WILL FLOOD ROADS AND CREEKS.

*IF YOU WILL BE DRIVING IN MERCER COUNTY THIS EVENINGh...ANTICIPATE
FLOODED ROADS...AND PREPARE TO SEEK AN ALTERNATE ROUTE IF YOU
ENCOUNTER FLOODING. NEVER DRIVE THROUGH AREAS WHERE WATER IS
RUNNING ACROSS A ROAD.

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 Jul 22, 3:05 PM EDT, 5 hours 3 minutes earlier.

Area forecast discussion, Jul 22, 3:05 PM EDT, 5 hours 3 minutes before

FORECAST COORDINATION MESSAGE
NATIONAL WEATHER SERVICE WILMINGTON OH
305 PM EDT WED JUL 22 1998

SFC FNT STILL HANGING UP ALNG XTRM NRN IN/IL AND MI BRDR THEN NE ALNG
CANADIAN BRDR. WTH XCPTN OF REMAINING BNDRY OVR KY...MOST APRNT SFC
BNDRYS LOOK TO BE NR SFC FNT OVR NRN IN/OH...WTH BEST POTL FOR TRIGGER
STILL BACK OVER IL/WRN IN. THIS IS ALSO AREA OF BEST SFC MSTR CONVG AND
PW/S UP TO ABT 1.8. PW/S OVR CNTRL OH UP TO 1.5. GETTING PLENTY OF SS
ACRS ALL BUT NORTH WESTERN CWA...BUT STILL NO SIGNS OF CU DVLPMT XCPT
OVR KY ALNG REMAINING BNDRY FM MID MORNING.

BEST SCENARIO FOR UPR DIV/LL CONV COMBO APRS TO BE OVR CNTRL/NRN IN
THRU EVENING AND XTNDG BACK SW THRU SRN IL. OVERNIGHT AS SFC FNT SAGS
S...PERHAPS FAR WRN FA WL BE CLOSE TO BEST AREA FOR INSTABY...THTE
RIDGE AND CONVERGENCE. LLJ WL ALSO SET UP NR OH RVR TO HELP KEEP THINGS
GOING OVERNIGHT. THIS COMBINED WTH A DIFLUENT THKNS PATTERN SHUD BE
PLENTY TO FUEL TSRA ESPCY OVR IN/IL...AND XNOSING INTO MAINLY WRN AND
SRN HALF OF ILN FA.

NGM HAS SFC FNT PROGGED TO PASS THRU DAY BY 24H...CMH ARND 16Z
THU...THEN TO CVG/PMH BY 18Z THU.

CVG 74/85/68 761
CMH 72/84/67 651
DAY 71/84/65 751

DIAN-REED

In the hours before

Local storm report, Jul 22, 2:42 PM EDT, 5 hours 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OHIO
242 PM EDT WED JUL 22 1998

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

1105 PM    KENTON                    OH   WIND DAMAGE
07/21/98   HARDIN                         TREES DOWN IN THE CENTRAL
                                          PART OF THE COUNTY.

Special weather statement, Jul 22, 3:53 PM EDT, 4 hours 15 minutes before

INZ050-058-059-066-073>075-080-230200-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
348 PM EDT (248 PM EST) WED JUL 22 1998

...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 900 PM EST (1000 PM
   EDT) FOR EAST CENTRAL AND SOUTHEAST INDIANA...

WARM MOIST AIR AND AN UNSTABLE ATMOSPHERE ARE COMBINING TO INCREASE
THE POTENTIAL FOR SEVERE THUNDERSTORM DEVELOPMENT OVER PORTIONS OF
INDIANA THROUGH TONIGHT. A COMPLEX OF THUNDERSTORMS OVER ILLINOIS
THIS AFTERNOON WILL PUSH EAST THROUGH INDIANA THROUGH THE REMAINDER
OF THE AFTERNOON AND INTO THE EVENING HOURS.

CITIES AND TOWNS IN THE WATCH AREA INCLUDE...RICHMOND...BROOKVILLE
...CONNERSVILLE...VERSAILLES...LAWRENCEBURG...RISING SUN AND WARSAW.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS THERE IS A POTENTIAL
FOR THUNDERSTORMS CONTAINING LARGE HAIL AND DAMAGING WINDS IN AND
NEAR THE WATCH AREA.

STAY TUNED TO NOAA WEATHER RADIO OR COMMERCIAL MEDIA FOR FURTHER
UPDATES AND POSSIBLE WARNINGS.

.END/DIAN-REED

Special weather statement, Jul 22, 4:13 PM EDT, 3 hours 55 minutes before

INZ050-058-059-066-073>075-080-230100-
SPECIAL WEATHER STATEMENT...CORRECTION...
NATIONAL WEATHER SERVICE WILMINGTON OH
410 PM EDT (310 PM EST) WED JUL 22 1998

...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 800 PM EST (900 PM
   EDT) FOR EAST CENTRAL AND SOUTHEAST INDIANA...

WARM MOIST AIR AND AN UNSTABLE ATMOSPHERE ARE COMBINING TO INCREASE
THE POTENTIAL FOR SEVERE THUNDERSTORM DEVELOPMENT OVER PORTIONS OF
INDIANA THROUGH TONIGHT. A COMPLEX OF THUNDERSTORMS OVER ILLINOIS
THIS AFTERNOON WILL PUSH EAST THROUGH INDIANA THROUGH THE REMAINDER
OF THE AFTERNOON AND INTO THE EVENING HOURS.

CITIES AND TOWNS IN THE WATCH AREA INCLUDE...RICHMOND...BROOKVILLE
...CONNERSVILLE...VERSAILLES...LAWRENCEBURG...RISING SUN AND WARSAW.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS THERE IS A POTENTIAL
FOR THUNDERSTORMS CONTAINING LARGE HAIL AND DAMAGING WINDS IN AND
NEAR THE WATCH AREA.

STAY TUNED TO NOAA WEATHER RADIO OR COMMERCIAL MEDIA FOR FURTHER
UPDATES AND POSSIBLE WARNINGS.

.END
...CORRECTION FOR EXPIRATION TIME OF THE WATCH...
/DIAN-REED

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 8:59 PM EDT	Flash Flood Warning	ILN	Auglaize, Hardin	91 min

Nearby

Flash Flood Warnings in Ohio, 1998 Every 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.