Alert archive / Ohio / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 70, NWS Wilmington, OH
NWS Wilmington, OH issued this severe thunderstorm warning at May 20, 1998, 10:33 PM EDT for Montgomery County, Ohio. It was in force for 57 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, 10:33 PM EDT (02:33 UTC)
- Expired
- May 20, 1998, 11:30 PM EDT
- In force
- 57 min
- Issued by
- NWS Wilmington, OH
- Area
- Whole counties
County Montgomery County, OH
The radar
The Cincinnati radar (KILN), 55 km from the middle of the area, began a volume at 02:35 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 20, 10:55 PM EDT | Thunderstorm Wind 60 | Kettering, OH | Trees and power lines downed. Also, a wooden baseball dugout was completely destroyed. |
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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 20, 7:45 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Cncnati-Daytn, OH (KILN), launched 00:00Z, 2.6 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.
- 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, 1 hour 31 minutes earlier.
Area forecast discussion, May 20, 9:02 PM EDT, 1 hour 31 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, 4:33 PM EDT, 6 hours before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Special weather statement, May 20, 4:33 PM EDT, 6 hours before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Special weather statement, May 20, 4:59 PM EDT, 5 hours 34 minutes before
INZ050-058-059-066-073>075-080-KYZ089-090-094>100-210200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILMINGTON OH 459 PM EDT WED MAY 20 1998 ...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT FOR MUCH OF NORTHERN KENTUCKY... SOME CITIES IN THE WATCH AREA INCLUDE CARROLTON...MAYSVILLE AND OWENTOWN. THE SEVERE THUNDERSTORM WATCH FOR EAST-CENTRAL AND SOUTHEAST INDIANA HAS BEEN CANCELED. A WARM AND HUMID AIRMASS HAS DEVELOPED ACROSS THE OHIO VALLEY THIS AFTERNOON AHEAD OF A COLD FRONT PUSHING SOUTH OUT OF THE GREAT LAKES. SHOWERS AND THUNDERSTORMS MOVING ACROSS ILLINOIS... INDIANA...AND WESTERN KENTUCKY THIS AFTERNOON ARE EXPECTED TO INTENSIFY AS THEY MOVE INTO NORTHERN KENTUCKY LATE THIS AFTERNOON. THESE STORMS WILL BE CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING WINDS. SCATTERED THUNDERSTORMS ARE STILL POSSIBLE ACROSS SOUTHEAST AND EAST-CENTRAL INDIANA...BUT NO SEVERE THUNDERSTORMS ARE EXPECTED THIS EVENING. RESIDENTS OF SOUTHEASTERN INDIANA AND NORTHERN KENTUCKY SHOULD KEEP AN EYE TO THE SKY AND STAY TUNED TO NOAA WEATHER RADIO. WILKINSON
Special weather statement, May 20, 6:50 PM EDT, 3 hours 43 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, 3 hours 43 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
The office that day
Everything else NWS Wilmington, OH issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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 |
| May 21, 1:04 AM EDT | Severe Thunderstorm Warning | ILN | Scioto | 56 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.