Alert archive / Missouri / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 231, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jun 18, 1998, 4:55 PM CDT for Shelby County, Missouri. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 18, 1998, 4:55 PM CDT (21:55 UTC)
- Expired
- Jun 18, 1998, 5:45 PM CDT
- In force
- 50 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Shelby County, MO
The radar
The St Louis radar (KLSX), 171 km from the middle of the area, began a volume at 21:57 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 18, 12:00 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 18, 4:00 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 9.9 hours before the alert went out and 242 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
- 2000 J/kg
- Mixed-layer CIN
- -220 J/kg
- Mixed-layer LCL
- 1205 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 112 m²/s²
- 0-3 km storm-relative helicity
- 81 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
580 WUUS1 KSTL 182157 RRA SVRSTL MOC205-182245- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 455 PM CDT THU JUN 18 1998 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SHELBY COUNTY IN NORTHEASTERN MISSOURI * UNTIL 545 PM CDT * AT 455 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM LEONARD TO CLARENCE... MOVING EAST-NORTHEAST AT 40 MPH. * LOCATIONS THAT WILL BE AFFECTED... SHELBYVILLE SHELBINA BETHEL THE PRIMARY SEVERE WEATHER THREAT IS DAMAGING WINDS. MOVE QUICKLY TO A STURDY BUILDING AND STAY AWAY FROM DOORS AND WINDOWS. GLASS/TRUETT
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.
In the hours before
Special weather statement, Jun 18, 11:00 AM CDT, 5 hours 55 minutes before
ILZ058>060-064-065-069-070-074-079-095>102-MOZ009-010-018-019-026- 027-034>036-041-042-047>052-059>065-072>075-084-085-099-191100- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 11 AM CDT THU JUN 18 1998 THIS OUTLOOK COVERS THE COUNTY WARNING AREA OF THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN ST LOUIS. AREAS INCLUDED ARE PORTIONS OF NORTHEAST...CENTRAL...EAST CENTRAL AND SOUTHEAST MISSOURI AS WELL AS WEST CENTRAL AND SOUTHWEST ILLINOIS. A COLD FRONT WILL MOVE ACROSS MISSOURI TONIGHT. AHEAD OF THIS FRONT... A WARM AND HUMID AIR MASS WILL HELP FUEL THUNDERSTORM DEVELOPMENT ACROSS THE AREA. THERE IS A SLIGHT RISK OF SEVERE WEATHER ACROSS THE ENTIRE COUNTY WARNING AREA WITH THE MAIN THREAT OF SEVERE WEATHER EXPECTED LATE THIS AFTERNOON AND TONIGHT. SKYWARN ACTIVATION MAY BE REQUIRED THIS AFTERNOON AND TONIGHT. WORK
Special weather statement, Jun 18, 11:00 AM CDT, 5 hours 55 minutes before
ILZ058>060-064-065-069-070-074-079-095>102-MOZ009-010-018-019-026- 027-034>036-041-042-047>052-059>065-072>075-084-085-099-191100- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 11 AM CDT THU JUN 18 1998 THIS OUTLOOK COVERS THE COUNTY WARNING AREA OF THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN ST LOUIS. AREAS INCLUDED ARE PORTIONS OF NORTHEAST...CENTRAL...EAST CENTRAL AND SOUTHEAST MISSOURI AS WELL AS WEST CENTRAL AND SOUTHWEST ILLINOIS. A COLD FRONT WILL MOVE ACROSS MISSOURI TONIGHT. AHEAD OF THIS FRONT... A WARM AND HUMID AIR MASS WILL HELP FUEL THUNDERSTORM DEVELOPMENT ACROSS THE AREA. THERE IS A SLIGHT RISK OF SEVERE WEATHER ACROSS THE ENTIRE COUNTY WARNING AREA WITH THE MAIN THREAT OF SEVERE WEATHER EXPECTED LATE THIS AFTERNOON AND TONIGHT. SKYWARN ACTIVATION MAY BE REQUIRED THIS AFTERNOON AND TONIGHT. WORK
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 10:31 AM CDT | Severe Thunderstorm Warning | LSX | Moniteau | 44 min |
| Jun 18, 10:46 AM CDT | Severe Thunderstorm Warning | LSX | Boone | 49 min |
| Jun 18, 11:19 AM CDT | Severe Thunderstorm Warning | LSX | Audrain | 46 min |
| Jun 18, 12:03 PM CDT | Severe Thunderstorm Warning | LSX | Knox | 47 min |
| Jun 18, 12:14 PM CDT | Severe Thunderstorm Warning | LSX | Scotland | 51 min |
| Jun 18, 12:14 PM CDT | Severe Thunderstorm Warning | LSX | Shelby | 51 min |
| Jun 18, 2:47 PM CDT | Severe Thunderstorm Warning | LSX | Cole, Osage | 48 min |
| Jun 18, 3:30 PM CDT | Severe Thunderstorm Warning | LSX | Marion | 50 min |
| Jun 18, 4:06 PM CDT | Severe Thunderstorm Warning | LSX | Knox, Scotland | 64 min |
| Jun 18, 4:33 PM CDT | Severe Thunderstorm Warning | LSX | Clark | 32 min |
| Jun 18, 5:06 PM CDT | Severe Thunderstorm Warning | LSX | Clark | 34 min |
| Jun 18, 5:46 PM CDT | Severe Thunderstorm Warning | LSX | Boone | 34 min |
| Jun 18, 6:19 PM CDT | Severe Thunderstorm Warning | LSX | Moniteau | 36 min |
| Jun 18, 6:25 PM CDT | Tornado Warning | LSX | Cole, Moniteau | 35 min |
| Jun 18, 6:59 PM CDT | Tornado Warning | LSX | Cole | 31 min |
Nearby
Severe Thunderstorm Warnings in Missouri, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.