Alert archive / Ohio / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 73, NWS Wilmington, OH

May 21, 1998Pike County, Ohio

NWS Wilmington, OH issued this severe thunderstorm warning at May 21, 1998, 12:34 AM EDT for Pike County, Ohio. It was in force for 61 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 21, 1998, 12:34 AM EDT (04:34 UTC)
Expired: May 21, 1998, 1:35 AM EDT
In force: 61 min
Issued by: NWS Wilmington, OH
Area: Whole counties

County Pike County, OH

The radar

The Cincinnati radar (KILN), 75 km from the middle of the area, began a volume at 04:35 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 21, 12:39 AM EDT	Thunderstorm Wind 50	Latham, OH	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, 4.6 hours before the alert went out and 74 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: 1019 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 1461 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 21 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

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

746 
WUUS01 KILN 210436 RRA
SVRILN
OHC131-210535-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE WILMINGTON OH
1234 AM EDT THU MAY 21 1998

THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A

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

* EFFECTIVE UNTIL 135 AM EDT.

* AT 1231 AM EDT... DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  15 MILES WEST OF PIKETON MOVING SOUTHEAST AT 30 MPH.

* SOME LOCATIONS AFFECTED...
           PIKETON      BY 1250 AM EDT
           LATHAM       BY 1238 AM EDT..



IF YOU ARE CAUGHT OUTSIDE...SEEK REFUGE FROM THE STORM IN A
STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DANGEROUS LIGHTNING ARE ALL LIKELY.

KELLS

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 20, 9:02 PM EDT, 3 hours 32 minutes earlier.

Area forecast discussion, May 20, 9:02 PM EDT, 3 hours 32 minutes before

FORECAST COORDINATION MESSAGE
NATIONAL WEATHER SERVICE WILMINGTON OH
902 PM EDT WED MAY 20 1998

00Z SFC ANALYSIS INDICATED A FRONT ON FAR NRN FRINGE OF FA.  SOUTH OF
THE FNT AN AREA OF LWR 70S DEWPOINTS WERE LOCATED ACROSS CNTRL IN AND
SWRN OH.  KILN 88D SHOWED AN AREA OF TSRA MOVG ALONG THE FNT TOWARD THE
NRN MIAMI VLY.  XPCT THIS ACTIVITY TO MOVE ALONG THE FNT AND STAY N OF
THE HIGHER INSTABILITY OVR SRN FA.  WL NEED TO KEEP SCT SHRA/TSRA IN
THE FCST.

FNT SHOULD DROP SLOWLY SWD TONIGHT BUT WITH CURRENT DEWPOINTS SUGGEST
RAISING TEMPS OVR SRN FA AT LEAST A CAT.

WILKINSON

In the hours before

Special weather statement, May 20, 6:50 PM EDT, 5 hours 44 minutes before

KYZ089-090-094>100-210300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
650 PM EDT WED MAY 20 1998

THE SEVERE THUNDERSTORM WATCH FOR MUCH OF NORTHERN KENTUCKY HAS BEEN
CANCELED.

A LINE OF THUNDERSTORMS WITH DAMAGING WINDS PASSED FROM LOUISVILLE TO
JUST SOUTH OF LEXINGTON LATE THIS AFTERNOON.  NORTHERN KENTUCKY
REMAINED NORTH OF THESE SEVERE STORMS.

SCATTERED THUNDERSTORMS ARE STILL POSSIBLE THIS EVENING AND TONIGHT BUT
SEVERE STORMS ARE NO LONGER EXPECTED.

WILKINSON

Special weather statement, May 20, 6:50 PM EDT, 5 hours 44 minutes before

KYZ089-090-094>100-210300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
650 PM EDT WED MAY 20 1998

THE SEVERE THUNDERSTORM WATCH FOR MUCH OF NORTHERN KENTUCKY HAS BEEN
CANCELED.

A LINE OF THUNDERSTORMS WITH DAMAGING WINDS PASSED FROM LOUISVILLE TO
JUST SOUTH OF LEXINGTON LATE THIS AFTERNOON.  NORTHERN KENTUCKY
REMAINED NORTH OF THESE SEVERE STORMS.

SCATTERED THUNDERSTORMS ARE STILL POSSIBLE THIS EVENING AND TONIGHT BUT
SEVERE STORMS ARE NO LONGER EXPECTED.

WILKINSON

Local storm report, May 20, 11:57 PM EDT, 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OHIO
1157 PM EDT WED MAY 20 1998

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

1055 PM    DAYTON                    OH   WIND DAMAGE
05/20/98   MONTGOMERY                     TREES DOWN BETWEEN DAYTON
                                          AND KETTERING

1115 PM    BELLBROOK                 OH   .75 INCH HAIL
05/20/98   GREENE                         DIME-SIZE HAIL

WILKINSON

Local storm report, May 20, 11:57 PM EDT, 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OHIO
1157 PM EDT WED MAY 20 1998

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

1055 PM    DAYTON                    OH   WIND DAMAGE
05/20/98   MONTGOMERY                     TREES DOWN BETWEEN DAYTON
                                          AND KETTERING

1115 PM    BELLBROOK                 OH   .75 INCH HAIL
05/20/98   GREENE                         DIME-SIZE HAIL

WILKINSON

The office that day

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

Issued	Product	Office	Counties	Lasted
May 20, 10:33 PM EDT	Severe Thunderstorm Warning	ILN	Montgomery	57 min
May 20, 10:53 PM EDT	Severe Thunderstorm Warning	ILN	Greene	57 min
May 20, 11:05 PM EDT	Severe Thunderstorm Warning	ILN	Clinton	60 min
May 21, 1:04 AM EDT	Severe Thunderstorm Warning	ILN	Scioto	56 min

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.