Alert archive / Ohio / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 74, NWS Wilmington, OH
NWS Wilmington, OH issued this severe thunderstorm warning at May 21, 1998, 1:04 AM EDT for Scioto County, Ohio. It was in force for 56 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, 1:04 AM EDT (05:04 UTC)
- Expired
- May 21, 1998, 2:00 AM EDT
- In force
- 56 min
- Issued by
- NWS Wilmington, OH
- Area
- Whole counties
County Scioto County, OH
The radar
The Cincinnati radar (KILN), 99 km from the middle of the area, began a volume at 05:05 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, 1:15 AM EDT | Thunderstorm Wind 50 | Lucasville, OH | Trees and power lines 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, 5.1 hours before the alert went out and 98 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.
- 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
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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, 4 hours 2 minutes earlier.
Area forecast discussion, May 20, 9:02 PM EDT, 4 hours 2 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
Local storm report, May 20, 11:57 PM EDT, 1 hour 7 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
WILKINSONLocal storm report, May 20, 11:57 PM EDT, 1 hour 7 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
WILKINSONThe 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, 12:34 AM EDT | Severe Thunderstorm Warning | ILN | Pike | 61 min |
Nearby
Severe Thunderstorm Warnings in Ohio, 1998Every 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.