Alert archive / Ohio / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 69, NWS Wilmington, OH

May 20, 1998Brown County, Ohio

NWS Wilmington, OH issued this severe thunderstorm warning at May 20, 1998, 12:15 AM EDT for Brown County, Ohio. It was in force for 60 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: May 20, 1998, 12:15 AM EDT (04:15 UTC)
Expired: May 20, 1998, 1:15 AM EDT
In force: 60 min
Issued by: NWS Wilmington, OH
Area: Whole counties

County Brown County, OH

The radar

The Cincinnati radar (KILN), 54 km from the middle of the area, began a volume at 04:14 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.

What was reported inside it

Time	Report	Where	Remark
May 20, 12:20 AM EDT	Thunderstorm Wind 50	Mt Orab, OH	Numerous trees downed.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 4.3 hours before the alert went out and 55 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: 1270 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 1675 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

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

089 
WUUS01 KILN 200418 RRA
SVRILN
OHC015-200510-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE WILMINGTON OH
1215 AM EDT WED MAY 20 1998

THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A

*SEVERE THUNDERSTORM WARNING FOR...
  BROWN COUNTY IN SOUTH CENTRAL OHIO.

* EFFECTIVE UNTIL 115 AM EDT.

* AT 1215 AM EDT... DOPPLER RADAR INDICATED A LINE OF SEVERE
  THUNDERSTORMS EXTENDING NORTH/SOUTH IN NORTHERN BROWN COUNTY
  ALONG STATE ROUTE 68.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...

   MT ORAB BY 1230 AM

DAMAGING WINDS AND TORRENTIAL RAIN ARE LIKELY WITH THIS STORM.
MOVE TO A STURDY BUILDING AND STAY AWAY FROM WINDOWS.

INNES

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at May 19, 9:07 PM EDT, 3 hours 8 minutes earlier.

Area forecast discussion, May 19, 9:07 PM EDT, 3 hours 8 minutes before

FORECAST COORDINATION MESSAGE
NATIONAL WEATHER SERVICE WILMINGTON OH
907 PM EDT TUE MAY 19 1998

MCS MUCH LARGER THAN IOWA WAS ACROSS THE OH VLY THIS EVENING.  A FEW
LARGE HAIL REPORTS HAVE BEEN RECEIVED SO FAR IN CWA.  AREA 88DS INDICATE
NMRS TSRA OVER IN WHICH WERE MOVG E AND SEWD TOWARD FA.  KILN 00Z
SOUNDING INDICATES THAT WIND DAMAGE COULD BECOME A THREAT AS WELL.
CURRENT FCSTS LOOK GOOD.

WILKINSON

In the hours before

Local storm report, May 19, 7:50 PM EDT, 4 hours 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OHIO
750 PM EDT TUE MAY 19 1998

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

0747 PM    MONTEZUMA                 OH   .75 INCH HAIL
05/19/98   MERCER                         REPORTED BY SPOTTER

Local storm report, May 19, 8:15 PM EDT, 4 hours before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OHIO
815 PM EDT TUE MAY 19 1998

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

0814 PM    ROUNDHEAD                 OH   .75 INCH HAIL
05/19/98   HARDIN                         DIME SIZE HAIL

Special weather statement, May 19, 8:19 PM EDT, 3 hours 56 minutes before

OHZ015-016-024>026-034-035-042>046-051>056-060>065-070>074-080-INZ
050-058-059-200500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
819 PM EDT TUE MAY 19 1998

....A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 100 AM EDT (1200
AM EST) FOR WESTERN AND CENTRAL OHIO AND EAST-CENTRAL INDIANA...

ALSO...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 100 AM EDT
(1200 AM EST) FOR RIPLEY COUNTY INDIANA...

SCATTERED THUNDERSTORMS WIVTH A HISTORY OF PRODUCING LARGE HAIL AND
DAMAGING WINDS WILL AFFECT THE WATCH AREA THROUGH THE EVENING HOURS.

RESIDENTS OF THE WATCH AREA SHOULD KEEP AN EYE TO THE SKY AND STAY
TUNED TO NOAA WEATHER RADIO.

WILKINSON

Special weather statement, May 19, 8:19 PM EDT, 3 hours 56 minutes before

OHZ015-016-024>026-034-035-042>046-051>056-060>065-070>074-080-INZ
050-058-059-200500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
819 PM EDT TUE MAY 19 1998

....A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 100 AM EDT (1200
AM EST) FOR WESTERN AND CENTRAL OHIO AND EAST-CENTRAL INDIANA...

ALSO...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 100 AM EDT
(1200 AM EST) FOR RIPLEY COUNTY INDIANA...

SCATTERED THUNDERSTORMS WIVTH A HISTORY OF PRODUCING LARGE HAIL AND
DAMAGING WINDS WILL AFFECT THE WATCH AREA THROUGH THE EVENING HOURS.

RESIDENTS OF THE WATCH AREA SHOULD KEEP AN EYE TO THE SKY AND STAY
TUNED TO NOAA WEATHER RADIO.

WILKINSON

Local storm report, May 19, 9:48 PM EDT, 2 hours 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OHIO
948 PM EDT TUE MAY 19 1998

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

0939 PM    SPRINGFIELD               OH   .75 INCH HAIL
05/19/98   CLARK

Local storm report, May 19, 11:20 PM EDT, 55 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OHIO
1120 PM EDT TUE MAY 19 1998

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

0753 PM    WAYNESFIELD               OH   .75 INCH HAIL
05/19/98   AUGLAIZE                       DIME SIZE HAIL

0920 PM    ROSSBURG                  OH   .75 INCH HAIL
05/19/98   DARKE                          DIME SIZE HAIL

0920 PM    ROSSBURG                  OH   WIND DAMAGE
05/19/98   DARKE                          POLES SNAPPED OFF AND
                                          KNOCKED DOWN

The office that day

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

Issued	Product	Office	Counties	Lasted
May 19, 8:00 PM EDT	Severe Thunderstorm Warning	ILN	Auglaize	60 min
May 19, 8:08 PM EDT	Severe Thunderstorm Warning	ILN	Hardin	57 min
May 19, 8:54 PM EDT	Severe Thunderstorm Warning	ILN	Darke	56 min
May 19, 9:13 PM EDT	Severe Thunderstorm Warning	ILN	Clark	62 min
May 19, 10:09 PM EDT	Severe Thunderstorm Warning	ILN	Greene	51 min
May 19, 11:51 PM EDT	Severe Thunderstorm Warning	ILN	Clermont	59 min
May 20, 1:08 AM EDT	Flash Flood Warning	ILN	Hamilton	2 hr

Nearby

Severe Thunderstorm Warnings in Ohio, 1998 Every severe thunderstorm 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.