Alert archive / Indiana / Flash Flood Warnings in 1998

Flash Flood Warning 15, NWS Wilmington, OH

April 15, 1998Franklin County, Indiana

NWS Wilmington, OH issued this flash flood warning at Apr 15, 1998, 9:53 PM EST for Franklin County, Indiana. 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: Apr 15, 1998, 9:53 PM EST (02:53 UTC)
Expired: Apr 15, 1998, 11:55 PM EST
In force: 2 hr
Issued by: NWS Wilmington, OH
Area: Whole counties

County Franklin County, IN

The radar

The Cincinnati radar (KILN), 106 km from the middle of the area, began a volume at 02:53 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, 2.9 hours before the alert went out and 108 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: 835 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 137 m²/s²
0-3 km storm-relative helicity: 283 m²/s²
Significant tornado parameter: 0.0
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 160256
FFWILN
INC047-160455-

BULLETIN
FLOOD WARNING
NATIONAL WEATHER SERVICE WILMINGTON OH
1053 PM EDT (953 PM EST) WED APR 15 1998

THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A

* FLOOD WARNING FOR SMALL STREAMS FOR...
  FRANKLIN COUNTY IN SOUTHEASTERN INDIANA

* EFFECTIVE UNTIL 1155 PM EST (1255 AM EDT)

* AT 950 EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF THUNDERSTORMS WITH VERY HEAVY RAIN MOVING INTO
  FRANKLIN COUNTY INDIANA. THE STORMS WERE MOVING NORTHEAST AT 30
  MPH.

* FLOODING CAN BE EXPECTED THROUGH MIDNIGHT...ESPECIALLY ALONG THE
  SMALLER STREAMS AND CREEKS.


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 Apr 15, 7:30 PM EST, 2 hours 23 minutes earlier.

Area forecast discussion, Apr 15, 7:30 PM EST, 2 hours 23 minutes before

FORECAST COORDINATION MESSAGE
NATIONAL WEATHER SERVICE WILMINGTON OH
830 PM EDT WED APR 15 1998

WARM FRNT PUSHING THRU XTRM N COUNTIES OF CWA. SHRA DEVELOPG NR THIS
BNDRY SHUD LIFT N/E OF CWA DURG NEXT COUPLE OF HRS. MEANWHILE...
NUMEROUS SHRA/TSRA MOVG THRU S HLF OF CWA...IN AREA OF SFC MSTR CONVRG
AND N OF SECOND WARM FRNT PUSHING INTO N KY. TSTMS HAVE PUSHED OUT
OF SW COUNTIES OF CWA...WITH ADDL TSTMS DEVELOPING INVOF WARM FRNT
ACRS S CNTL/SW IN AND FURTHER TO W ACRS E MO/S IL.

S WARM FRNT WL CONT TO PRESS TWD N AND INTO CWA OVERNITE. SFC DWPTS WL
CONT TO RISE...INTO LWR 60S ACRS S. ALSO...LOW LVL JET/ASSOCIATED
FORCING WL INTENSIFY/PUSH INTO S/CNTL SECTIONS AND UPR LVL DIVERGC
WL INCR AS N JET MAX HEADS INTO GREAT LAKES AND S JET MAX APPROACHES
REGION FROM SW. WITH THESE INGREDIENTS IN PLACE...CONDITIONS WL REMAIN
FAVORABLE FOR SHRA/TSRA TO DEVELOP WITHIN AND PUSH INTO CWA THRU NITE.

FCST WIND PROFILE/INSTABILITY COMBINATION SHUD KEEP SVR THREAT GOING
THRU NITE. ALSO...WITH CONTINUED REDEVELOPMNT OVERNITE...AND GIVEN
HVY RAFL THAT HAS ALREADY FALLEN IN SOME LOCATIONS...POTENTIAL EXISTS
FOR EXCESSIVE RAFL. INITIALLY...GREATEST THREAT FOR HVY RAFL WL BE S OF
RICH-DAY-CMH LINE...BUT HVY RAFL MAY SPREAD FARTHER N AS WARM FRNT
PUSHES INTO REGION. CONT FLOOD WATCH CURRNTLY IN EFFECT FOR S OH...AND
SUGGEST ISSUING FLASH FLOOD WATCHES FOR SE IN/N KY. ALSO...CONSIDER
EXTENDING FLOOD/FLASH FLOOD WATCHES INTO RICH-DAY-CMH pVCNTYS.

TMPS WL NOT FALL MUCH BLO CURRNT LVLS ANYWHERE IN CWA...AND WL LIKELY
HOLD STEADY OR SLOWLY RISE ACRS S AS WARM FRNT PUSHES THRU AREA...ALTHO
CUD BRIEFLY FALL BACK A FEW DEGREES IN TSTMS.

ROWLEY

In the hours before

Local storm report, Apr 15, 8:07 PM EST, 1 hour 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OHIO
907 PM EDT WED APR 15 1998

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

0800 PM    HILLSBORO                 OH   1.75 INCH HAIL
04/15/98   HIGHLAND                       5 MILES EAST OF HILLSBORO
                                          NEAR ROCKY FORK LAKE.

Local storm report, Apr 15, 8:07 PM EST, 1 hour 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OHIO
907 PM EDT WED APR 15 1998

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

0800 PM    HILLSBORO                 OH   1.75 INCH HAIL
04/15/98   HIGHLAND                       5 MILES EAST OF HILLSBORO
                                          NEAR ROCKY FORK LAKE.

Special weather statement, Apr 15, 8:33 PM EST, 1 hour 20 minutes before

INZ050-058-059-066-073>075-080-160700-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
930 PM EDT (830 PM EST) WED APR 15 1998

...TORNADO WATCH IN EFFECT FOR EAST CENTRAL INDIANA AND SOUTHEAST
INDIANA UNTIL 3 AM EDT (2 AM EST)...

THE STORM PREDICTION CENTER IN NORMAN OKLAHOMA HAS ISSUED A
TORNADO WATCH FOR ALL OF EAST CENTRAL INDIANA...INCLUDING RICHMOND
AND CONNERSVILLE...AND FOR SOUTHEAST INDIANA...INCLUDING VERSAILLES
AND LAWRENCEBURG.

AT 925 PM EDT (825 PM EST)...NUMEROUS THUNDERSTORMS WERE DEVELOPING
ACROSS SOUTHERN INDIANA. THESE THUNDERSTORMS WERE MOVING TOWARD THE
EAST AND WILL SPREAD INTO EAST CENTRAL AND SOUTHEAST SECTIONS OF
INDIANA BETWEEN 10 PM AND 11 PM EDT (9 PM AND 10 PM EST) THIS
EVENING.

CONDITIONS ARE FAVORABLE FOR ANY OF THESE THUNDERSTORMS TO INTENSIFY
RAPIDLY AND TO PRODUCE TORNADOES...LARGE HAIL AND DAMAGING WIND
GUSTS. ALSO...THUNDERSTORMS WILL PRODUCE TORRENTIAL DOWNPOURS
CAPABLE OF FLOODING SMALL STREAMS AND LOW-LYING ROADS. REMAIN ALERT
FOR FREQUENT CLOUD TO GROUND LIGHTNING STRIKES AS WELL.

IF YOU ARE LOCATED WITHIN OR NEAR EAST CENTRAL INDIANA OR SOUTHEAST
INDIANA...PLEASE STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL
RADIO...LOCAL OR CABLE TELEVISION FOR UPDATED INFORMATION AND
POSSIBLE WARNINGS.

ROWLEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 15, 10:09 PM EST	Severe Thunderstorm Warning	ILN	Franklin, Ripley	46 min
Apr 15, 11:30 PM EST	Flash Flood Warning	ILN	Dearborn, Ripley	2 hr
Apr 15, 11:47 PM EST	Flash Flood Warning	ILN	Franklin	118 min
Apr 16, 12:35 AM EST	Flash Flood Warning	ILN	Dearborn, Franklin, Ripley	115 min
Apr 16, 2:35 AM EST	Flash Flood Warning	ILN	Dearborn, Franklin, Ripley	3 hr
Apr 16, 4:10 AM EST	Flash Flood Warning	ILN	Ohio, Switzerland	3 hr
Apr 16, 6:03 AM EST	Flash Flood Warning	ILN	Dearborn, Franklin, Ripley	3 hr
Apr 16, 6:30 AM EST	Flash Flood Warning	ILN	Switzerland	3 hr
Apr 16, 6:30 AM EST	Flash Flood Warning	ILN	Ohio	3 hr
Apr 16, 4:14 PM EST	Severe Thunderstorm Warning	ILN	Franklin	56 min

Nearby

Flash Flood Warnings in Indiana, 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.