Alert archive / Missouri / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 160, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 23, 1998, 4:29 PM CDT for Callaway County, Missouri. It was in force for 46 min. 3 reports 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 23, 1998, 4:29 PM CDT (21:29 UTC)
- Expired
- May 23, 1998, 5:15 PM CDT
- In force
- 46 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Callaway County, MO
The radar
The St Louis radar (KLSX), 109 km from the middle of the area, began a volume at 21:32 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 23, 4:40 PM CDT | Hail 1.75 | Holts Summit, MO | |
| May 23, 4:46 PM CDT | Hail 1 | (Jef)Jffrsn City Mem, MO | |
| May 23, 5:15 PM CDT | Hail 0.75 | Fulton, 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 |
|---|---|---|---|
| May 23, 3:15 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 9.5 hours before the alert went out and 271 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
- 1719 J/kg
- Mixed-layer CIN
- -204 J/kg
- Mixed-layer LCL
- 1570 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 166 m²/s²
- 0-3 km storm-relative helicity
- 214 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
317 WUUS1 KSTL 232130 RRA SVRSTL MOC027-232215- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 429 PM CDT SAT MAY 23 1998 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CALLAWAY COUNTY IN CENTRAL MISSOURI * UNTIL 515 PM CDT * AT 430 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES SOUTH OF JEFFERSON CITY... MOVING NORTHEAST AT 35 MPH. * LOCATIONS THAT WILL BE AFFECTED... HOLTS SUMMIT NEW BLOOMFIELD THE PRIMARY SEVERE WEATHER THREAT IS DAMAGING HAIL. LARGE HAIL CAN CAUSE EXTENSIVE PROPERTY DAMAGE AN SERIOUS INJURY TO PEOPLE CAUGHT OUTDOORS. MOVE INSIDE A STURDY BUILDING IMMEDIATELY. GLASS/GKS
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, May 23, 10:40 AM CDT, 5 hours 49 minutes before
MOZ042-041-050-010-048-072-062-059-084-018-019-052-085-027-047- 051-034-049-036-035-099-061-075-074-063-064-009-026-060-073-ILZ095- 064-096-098-069-065-058-099-059-100-070-102-060-097-079-101-074- MOZ065-232300- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 1040 AM CDT SAT MAY 23 1998 THIS OUTLOOK COVERS THE COUNTY WARNING AREA OF THE NWS OFFICE IN ST. LOUIS. AREAS INCLUDED ARE PARTS OF CENTRAL...NORTHEAST AND EAST CENTRAL MISSOURI...AND SOUTHWEST ILLINOIS. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE ENTIRE AREA THIS AFTERNOON AND TONIGHT. THERE IS ALSO A THREAT OF LOCALLY HEAVY RAIN OVER NORTHEAST MISSOURI AND WEST CENTRAL ILLINOIS. A QUASI-STATIONARY FRONT WILL REMAIN DRAPED ACROSS THE CENTRAL THIRD OF MISSOURI THIS AFTERNOON AND TONIGHT. THIS FRONT...COMBINED WITH VERY UNSTABLE AIR THAT BLANKETS THE CENTRAL U.S....WILL RESULT IN THUNDERSTORM DEVELOPMENT THIS AFTERNOON AND EVENING. GIVEN THE HIGH DEGREE OF INSTABILITY...SOME OF THESE STORMS WILL LIKELY BECOME SEVERE WITH LARGE HAIL AND DAMAGING WINDS THE MAIN THREAT. STORM SPOTTER GROUPS AND EMERGENCY MANAGERS SHOULD KEEP ADVISED OF THE LATEST FORECASTS...AND MONITOR LATER WEATHER INFORMATION FOR POSSIBLE SKYWARN ACTION. GLASS
Special weather statement, May 23, 10:40 AM CDT, 5 hours 49 minutes before
MOZ042-041-050-010-048-072-062-059-084-018-019-052-085-027-047- 051-034-049-036-035-099-061-075-074-063-064-009-026-060-073-ILZ095- 064-096-098-069-065-058-099-059-100-070-102-060-097-079-101-074- MOZ065-232300- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 1040 AM CDT SAT MAY 23 1998 THIS OUTLOOK COVERS THE COUNTY WARNING AREA OF THE NWS OFFICE IN ST. LOUIS. AREAS INCLUDED ARE PARTS OF CENTRAL...NORTHEAST AND EAST CENTRAL MISSOURI...AND SOUTHWEST ILLINOIS. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE ENTIRE AREA THIS AFTERNOON AND TONIGHT. THERE IS ALSO A THREAT OF LOCALLY HEAVY RAIN OVER NORTHEAST MISSOURI AND WEST CENTRAL ILLINOIS. A QUASI-STATIONARY FRONT WILL REMAIN DRAPED ACROSS THE CENTRAL THIRD OF MISSOURI THIS AFTERNOON AND TONIGHT. THIS FRONT...COMBINED WITH VERY UNSTABLE AIR THAT BLANKETS THE CENTRAL U.S....WILL RESULT IN THUNDERSTORM DEVELOPMENT THIS AFTERNOON AND EVENING. GIVEN THE HIGH DEGREE OF INSTABILITY...SOME OF THESE STORMS WILL LIKELY BECOME SEVERE WITH LARGE HAIL AND DAMAGING WINDS THE MAIN THREAT. STORM SPOTTER GROUPS AND EMERGENCY MANAGERS SHOULD KEEP ADVISED OF THE LATEST FORECASTS...AND MONITOR LATER WEATHER INFORMATION FOR POSSIBLE SKYWARN ACTION. GLASS
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 4:10 PM CDT | Severe Thunderstorm Warning | LSX | Cole, Osage | 50 min |
| May 23, 5:12 PM CDT | Severe Thunderstorm Warning | LSX | Callaway | 33 min |
| May 23, 5:30 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson | 45 min |
| May 23, 5:34 PM CDT | Severe Thunderstorm Warning | LSX | Audrain, Montgomery | 46 min |
| May 23, 5:37 PM CDT | Severe Thunderstorm Warning | LSX | Audrain, Boone | 48 min |
| May 23, 5:59 PM CDT | Tornado Warning | LSX | Saint Charles, Saint Louis | 51 min |
| May 23, 6:20 PM CDT | Tornado Warning | LSX | Pike | 50 min |
| May 23, 6:24 PM CDT | Severe Thunderstorm Warning | LSX | Monroe | 51 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.