Alert archive / Missouri / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 131, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 21, 1998, 3:20 PM CDT for Iron County, Madison County, Missouri. It was in force for 45 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 21, 1998, 3:20 PM CDT (20:20 UTC)
- Expired
- May 21, 1998, 4:05 PM CDT
- In force
- 45 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
Counties Iron County, MO, Madison County, MO
The radar
The St Louis radar (KLSX), 135 km from the middle of the area, began a volume at 20:22 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 21, 11:30 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 8.3 hours before the alert went out and 298 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
- 2242 J/kg
- Mixed-layer CIN
- -143 J/kg
- Mixed-layer LCL
- 1149 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 55 m²/s²
- 0-3 km storm-relative helicity
- 86 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.8
The text
As transmitted, in the capitals the NWS used until 2016.
409 WUUS1 KSTL 212021 RRA SVRSTL MOC093-123-212105- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 320 PM CDT THU MAY 21 1998 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN IRON COUNTY IN SOUTHEASTERN MISSOURI MADISON COUNTY MISSOURI IN SOUTHEASTERN MISSOURI * UNTIL 405 PM CDT * AT 317 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES EAST OF GLOVER... MOVING SOUTHEAST AT 20 TO 25 MPH. * LOCATIONS THAT WILL BE AFFECTED... CRANE LAKE ANNAPOLIS SACO HIGHWAY 67 3/4 INCH HAIL NEAR IRONTON AT 245 PM SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND GUSTS IN EXCESS OF 60 MPH...DAMAGING HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OR YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. JPK/GS &
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 21, 1:29 PM CDT, 1 hour 51 minutes before
ILZ095>097-MOZ026-034>036-041-042-047-048-050-211930- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 129 PM CDT THU MAY 21 1998 ...SEVERE THUNDERSTORM WATCH 384 FOR CENTRAL MISSOURI HAS EXPIRED... ...SEVERE THUNDERSTORM WATCH 386 HAS BEEN CANCELLED FOR PORTIONS OF WEST CENTRAL ILLINOIS... THE FOLLOWING COUNTIES ARE NO LONGER IN ANY SEVERE THUNDERSTORM WATCH... IN MISSOURI...BOONE...MONITEAU...COLE...AUDRAIN...RALLS...SHELBY...PIKE ...MONROE...CALLAWAY IN ILLINOIS...ADAMS...BROWN...PIKE .END GLASS
Special weather statement, May 21, 1:29 PM CDT, 1 hour 51 minutes before
ILZ095>097-MOZ026-034>036-041-042-047-048-050-211930- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 129 PM CDT THU MAY 21 1998 ...SEVERE THUNDERSTORM WATCH 384 FOR CENTRAL MISSOURI HAS EXPIRED... ...SEVERE THUNDERSTORM WATCH 386 HAS BEEN CANCELLED FOR PORTIONS OF WEST CENTRAL ILLINOIS... THE FOLLOWING COUNTIES ARE NO LONGER IN ANY SEVERE THUNDERSTORM WATCH... IN MISSOURI...BOONE...MONITEAU...COLE...AUDRAIN...RALLS...SHELBY...PIKE ...MONROE...CALLAWAY IN ILLINOIS...ADAMS...BROWN...PIKE .END GLASS
Special weather statement, May 21, 1:42 PM CDT, 1 hour 38 minutes before
ILZ098-MOZ049-051-052-059-060-211945- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 142 PM CDT THU MAY 21 1998 ...SEVERE THUNDERSTORM WATCH 386 HAS BEEN CANCELLED FOR PORTIONS OF EAST CENTRAL MISSOURI AND SOUTHWEST ILLINOIS... THE FOLLOWING COUNTIES ARE NO LONGER IN ANY SEVERE THUNDERSTORM WATCH... IN MISSOURI...LINCOLN...MONTGOMERY...WARREN...GASCONADE...OSAGE IN ILLINOIS...CALHOUN .END GLASS
Special weather statement, May 21, 1:42 PM CDT, 1 hour 38 minutes before
ILZ098-MOZ049-051-052-059-060-211945- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 142 PM CDT THU MAY 21 1998 ...SEVERE THUNDERSTORM WATCH 386 HAS BEEN CANCELLED FOR PORTIONS OF EAST CENTRAL MISSOURI AND SOUTHWEST ILLINOIS... THE FOLLOWING COUNTIES ARE NO LONGER IN ANY SEVERE THUNDERSTORM WATCH... IN MISSOURI...LINCOLN...MONTGOMERY...WARREN...GASCONADE...OSAGE IN ILLINOIS...CALHOUN .END GLASS
Special weather statement, May 21, 2:06 PM CDT, 1 hour 14 minutes before
ILZ058-059-099-MOZ061>064-212000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 206 PM CDT THU MAY 21 1998 ...SEVERE THUNDERSTORM WATCH 386 HAS BEEN CANCELLED FOR PORTIONS OF EAST CENTRAL MISSOURI AND SOUTHWEST ILLINOIS... THE FOLLOWING COUNTIES ARE NO LONGER IN ANY SEVERE THUNDERSTORM WATCH... IN MISSOURI...ST LOUIS COUNTY AND CITY...ST CHARLES...FRANKLIN IN ILLINOIS...GREENE...JERSEY...MACOUPIN .END GLASS
Special weather statement, May 21, 3:00 PM CDT, 20 minutes before
ILZ060-064-100>102-MOZ065-072-073-212100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 300 PM CDT THU MAY 21 1998 ...SEVERE THUNDERSTORM WATCH 386 HAS BEEN CANCELLED FOR PORTIONS OF EAST CENTRAL MISSOURI AND SOUTHWEST ILLINOIS... THE FOLLOWING COUNTIES ARE NO LONGER IN ANY SEVERE THUNDERSTORM WATCH... IN MISSOURI...CRAWFORD...WASHINGTON...JEFFERSON IN ILLINOIS...MONROE...ST CLAIR...MADISON...BOND...MONTGOMERY .END GLASS
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 21, 10:16 AM CDT | Severe Thunderstorm Warning | LSX | Shelby | 49 min |
| May 21, 10:58 AM CDT | Severe Thunderstorm Warning | LSX | Audrain, Monroe | 47 min |
| May 21, 11:29 AM CDT | Severe Thunderstorm Warning | LSX | Pike | 46 min |
| May 21, 11:41 AM CDT | Severe Thunderstorm Warning | LSX | Callaway, Montgomery | 44 min |
| May 21, 12:05 PM CDT | Severe Thunderstorm Warning | LSX | Callaway | 35 min |
| May 21, 12:13 PM CDT | Severe Thunderstorm Warning | LSX | Osage | 32 min |
| May 21, 12:25 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Warren | 50 min |
| May 21, 12:28 PM CDT | Severe Thunderstorm Warning | LSX | Gasconade | 47 min |
| May 21, 12:53 PM CDT | Severe Thunderstorm Warning | LSX | Saint Louis | 47 min |
| May 21, 12:57 PM CDT | Severe Thunderstorm Warning | LSX | Franklin | 48 min |
| May 21, 1:06 PM CDT | Severe Thunderstorm Warning | LSX | City of Saint Louis | 44 min |
| May 21, 1:44 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson | 46 min |
| May 21, 1:54 PM CDT | Severe Thunderstorm Warning | LSX | Washington | 46 min |
| May 21, 2:28 PM CDT | Severe Thunderstorm Warning | LSX | Iron, Madison, Saint Francois | 52 min |
| May 21, 6:30 PM CDT | Flash Flood Warning | LSX | Iron, Madison | 5 hr |
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.