Alert archive / Missouri / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 263, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jun 20, 1998, 3:34 AM CDT for Jefferson County, Saint Louis County, Missouri; Monroe County, Illinois. It was in force for 51 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 20, 1998, 3:34 AM CDT (08:34 UTC)
- Expired
- Jun 20, 1998, 4:25 AM CDT
- In force
- 51 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
Counties Monroe County, IL, Jefferson County, MO, Saint Louis County, MO
The radar
The St Louis radar (KLSX), 43 km from the middle of the area, began a volume at 08:37 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 nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 8.6 hours before the alert went out and 249 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2156 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 99 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSTL 200834 RRA SVRSTL ILC133-MOC099-189-200920- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 334 AM CDT SAT JUN 20 1998 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WESTERN MONROE COUNTY ILLINOIS IN SOUTHWESTERN ILLINOIS JEFFERSON COUNTY IN EAST CENTRAL MISSOURI SOUTHERN ST LOUIS COUNTY IN EAST CENTRAL MISSOURI * UNTIL 425 AM CDT * AT 330 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 2 MILES SOUTHEAST OF DITTMER... MOVING NORTHEAST AT 30 MPH. * LOCATIONS THAT WILL BE AFFECTED... HOUSE SPRINGS CEDAR HILL 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. TPS/AMS
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 10:04 PM CDT | Severe Thunderstorm Warning | LSX | Gasconade, Osage | 61 min |
| Jun 19, 10:30 PM CDT | Severe Thunderstorm Warning | LSX | Reynolds | 50 min |
| Jun 19, 11:03 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Warren | 62 min |
| Jun 19, 11:39 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Saint Louis | 61 min |
| Jun 20, 1:38 AM CDT | Severe Thunderstorm Warning | LSX | Cole, Osage | 62 min |
| Jun 20, 1:38 AM CDT | Severe Thunderstorm Warning | LSX | Moniteau | 62 min |
| Jun 20, 4:39 AM CDT | Severe Thunderstorm Warning | LSX | Iron, Madison | 46 min |
| Jun 20, 12:00 PM CDT | Severe Thunderstorm Warning | LSX | Moniteau | 45 min |
| Jun 20, 12:54 PM CDT | Flash Flood Warning | LSX | Moniteau | 2 hr |
| Jun 20, 12:44 AM CDT | Severe Thunderstorm Warning | LSX | Monroe, Saint Clair | 66 min |
| Jun 20, 1:24 AM CDT | Severe Thunderstorm Warning | LSX | Randolph | 46 min |
| Jun 20, 1:32 AM CDT | Severe Thunderstorm Warning | LSX | Clinton, Washington | 48 min |
Nearby
Severe Thunderstorm Warnings in Missouri, 1998Severe Thunderstorm Warnings in Illinois, 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.