Alert archive / Missouri / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 232, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jun 18, 1998, 5:06 PM CDT for Clark County, Missouri. It was in force for 34 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
- Jun 18, 1998, 5:06 PM CDT (22:06 UTC)
- Expired
- Jun 18, 1998, 5:40 PM CDT
- In force
- 34 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Clark County, MO
The radar
The Quad Cities radar (KDVN), 165 km from the middle of the area, began a volume at 22:05 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 |
|---|---|---|---|
| Jun 18, 5:30 PM CDT | Thunderstorm Wind 50 | Kahoka, MO |
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 |
|---|---|---|---|
| Jun 18, 4:00 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 10.1 hours before the alert went out and 170 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.
679 WUUS1 KSTL 182207 RRA SVRSTL MOC045-182240- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 506 PM CDT THU JUN 18 1998 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN CLARK COUNTY IN NORTHEASTERN MISSOURI * UNTIL 540 PM CDT * AT 505 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM NEAR KAHOKA... MOVING EAST-NORTHEAST AT 40 MPH. * LOCATIONS THAT WILL BE AFFECTED... REVERE SAINT FRANCISVILLE WAYLAND THE PRIMARY SEVERE WEATHER THREAT IS DAMAGING WINDS. MOVE QUICKLY TO A STURDY BUILDING AND STAY AWAY FROM DOORS AND WINDOWS. GLASS/TRUETT
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, 4:55 PM CDT | Severe Thunderstorm Warning | LSX | Shelby | 50 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.