Alert archive / Missouri / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 79, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 2, 1998, 4:32 PM CDT for Sainte Genevieve County, Missouri. It was in force for 48 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
- May 2, 1998, 4:32 PM CDT (21:32 UTC)
- Expired
- May 2, 1998, 5:20 PM CDT
- In force
- 48 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Sainte Genevieve County, MO
The radar
The St Louis radar (KLSX), 99 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.
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 2, 2:00 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 9.5 hours before the alert went out and 286 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
- 4 J/kg
- Mixed-layer CIN
- -189 J/kg
- Mixed-layer LCL
- 1009 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 113 m²/s²
- 0-3 km storm-relative helicity
- 150 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
908 WUUS1 KSTL 022134 RRA SVRSTL MOC186-022220- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 432 PM CDT SAT MAY 2 1998 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... STE GENEVIEVE COUNTY IN EAST CENTRAL MISSOURI * UNTIL 520 PM CDT * AT 430 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 10 MILES NORTH OF FARMINGTON... MOVING EAST AT 30 MPH. * LOCATIONS THAT WILL BE AFFECTED... ROCKY RIDGE WEINGARTEN RIVER AUX VASE QUARTER-SIZED HAIL WAS REPORTED FROM THIS STORM IN ST FRANCOIS COUNTY AT 350 PM THIS STORM HAS A HISTORY OF DAMAGING HAIL. STAY INSIDE AND AWAY FROM WINDOWS. WDB &
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 2, 11:23 AM CDT, 5 hours 9 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>075-084-085-099-022230- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 1123 AM CDT SAT MAY 2 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 THIS AFTERNOON AND EARLY TONIGHT OVER PARTS OF SOUTHERN ILLINOIS AND NORTHEAST THROUGH SOUTHEAST MISSOURI IN THE AREAS COVERED BY ST LOUIS WARNING AREA. THIS INCLUDES ALL THE AREA COVERED BY THE ST LOUIS AREA OF RESPONSIBILITY. EXTREMELY COLD AIR IN MIDDLE AND UPPER LEVELS OF THE ATMOSPHERE IS MOVING SOUTHEAST FROM THE DAKOTAS OVER SOUTHERN ILLINOIS AND EASTERN MISSOURI. THIS...COMBINED WITH SURFACE HEATING WILL PRODUCE A VERY UNSTABLE AIR MASS...AND CAUSE THUNDERSTORMS TO DEVELOP ACROSS THE STATE THIS AFTERNOON. THE MOST SIGNIFICANT THREAT FOR SEVERE WEATHER FROM THESE STORMS WILL BE LARGE HAIL. THE HEIGHT OF THE FREEZING LEVEL IS RELATIVELY LOW...WHICH WILL REDUCE MELTING BEFORE STRIKING THE GROUND. EMERGENCY MANAGERS AND STORM SPOTTERS GROUPS SHOULD MONITOR WEATHER INFORMATION THROUGHOUT TODAY AND TONIGHT FOR POSSIBLE SKYWARN ACTIVATION. BECHTOLD
Special weather statement, May 2, 11:23 AM CDT, 5 hours 9 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>075-084-085-099-022230- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 1123 AM CDT SAT MAY 2 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 THIS AFTERNOON AND EARLY TONIGHT OVER PARTS OF SOUTHERN ILLINOIS AND NORTHEAST THROUGH SOUTHEAST MISSOURI IN THE AREAS COVERED BY ST LOUIS WARNING AREA. THIS INCLUDES ALL THE AREA COVERED BY THE ST LOUIS AREA OF RESPONSIBILITY. EXTREMELY COLD AIR IN MIDDLE AND UPPER LEVELS OF THE ATMOSPHERE IS MOVING SOUTHEAST FROM THE DAKOTAS OVER SOUTHERN ILLINOIS AND EASTERN MISSOURI. THIS...COMBINED WITH SURFACE HEATING WILL PRODUCE A VERY UNSTABLE AIR MASS...AND CAUSE THUNDERSTORMS TO DEVELOP ACROSS THE STATE THIS AFTERNOON. THE MOST SIGNIFICANT THREAT FOR SEVERE WEATHER FROM THESE STORMS WILL BE LARGE HAIL. THE HEIGHT OF THE FREEZING LEVEL IS RELATIVELY LOW...WHICH WILL REDUCE MELTING BEFORE STRIKING THE GROUND. EMERGENCY MANAGERS AND STORM SPOTTERS GROUPS SHOULD MONITOR WEATHER INFORMATION THROUGHOUT TODAY AND TONIGHT FOR POSSIBLE SKYWARN ACTIVATION. BECHTOLD
Special weather statement, May 2, 3:50 PM CDT, 42 minutes before
ILZ058-059-098-099-MOZ051-052-060-022145- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 350 PM CDT SAT MAY 2 1998 ...SEVERE THUNDERSTORM WATCH CANCELLED FOR PORTIONS OF EAST CENTRAL MISSOURI AND PORTIONS OF WEST CENTRAL ILLINOIS... THE SEVERE THUNDERSTORM WATCH NUMBER 266 HAS BEEN CANCELLED FOR THE FOLLOWING COUNTIES... IN MISSOURI... WARREN...LINCOLN IN ILLINOIS... CALHOUN...JERSEY...GREENE...AND MACOUPIN THE AREA OF SEVERE THUNDERSTORMS HAS MOVED SOUTH AND EAST OF THESE COUNTIES AND CONDITIONS ARE LESS FAVORABLE FOR SEVERE THUNDERSTORM DEVELOPMENT. SEVERE THUNDERSTORMS CONTINUE TO DEVELOP OVER PORTIONS OF EAST CENTRAL MISSOURI AND SOUTHWEST ILLINOIS. PERSONS IN THE WATCH AREA SHOULD CONTINUE TO MONITOR TV AND RADIO BROADCASTS FOR THE LATEST INFORMATION CONCERNING THE MOVEMENT OF STORMS AND STATUS OF WARNINGS AND WATCHES. WDB
Special weather statement, May 2, 3:50 PM CDT, 42 minutes before
ILZ058-059-098-099-MOZ051-052-060-022145- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 350 PM CDT SAT MAY 2 1998 ...SEVERE THUNDERSTORM WATCH CANCELLED FOR PORTIONS OF EAST CENTRAL MISSOURI AND PORTIONS OF WEST CENTRAL ILLINOIS... THE SEVERE THUNDERSTORM WATCH NUMBER 266 HAS BEEN CANCELLED FOR THE FOLLOWING COUNTIES... IN MISSOURI... WARREN...LINCOLN IN ILLINOIS... CALHOUN...JERSEY...GREENE...AND MACOUPIN THE AREA OF SEVERE THUNDERSTORMS HAS MOVED SOUTH AND EAST OF THESE COUNTIES AND CONDITIONS ARE LESS FAVORABLE FOR SEVERE THUNDERSTORM DEVELOPMENT. SEVERE THUNDERSTORMS CONTINUE TO DEVELOP OVER PORTIONS OF EAST CENTRAL MISSOURI AND SOUTHWEST ILLINOIS. PERSONS IN THE WATCH AREA SHOULD CONTINUE TO MONITOR TV AND RADIO BROADCASTS FOR THE LATEST INFORMATION CONCERNING THE MOVEMENT OF STORMS AND STATUS OF WARNINGS AND WATCHES. WDB
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 2, 1:33 PM CDT | Severe Thunderstorm Warning | LSX | Iron, Reynolds | 62 min |
| May 2, 2:38 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Gasconade | 62 min |
| May 2, 2:51 PM CDT | Severe Thunderstorm Warning | LSX | Washington | 64 min |
| May 2, 3:29 PM CDT | Severe Thunderstorm Warning | LSX | Sainte Genevieve | 61 min |
| May 2, 3:38 PM CDT | Severe Thunderstorm Warning | LSX | Saint Francois | 62 min |
| May 2, 4:04 PM CDT | Severe Thunderstorm Warning | LSX | Iron, Reynolds | 56 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.