Alert archive / Missouri / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 264, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jun 20, 1998, 4:39 AM CDT for Iron County, Madison County, Missouri. It was in force for 46 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 20, 1998, 4:39 AM CDT (09:39 UTC)
- Expired
- Jun 20, 1998, 5:25 AM CDT
- In force
- 46 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 09:38 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 20, 4:50 AM CDT | Thunderstorm Wind 55 | Annapolis, 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 20, 12:00 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 9.7 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
- 2710 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 1096 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 201 m²/s²
- Significant tornado parameter
- 1.8
- Supercell composite
- 13.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSTL 200939 RRA SVRSTL MOC093-123-201025- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 439 AM CDT SAT JUN 20 1998 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN IRON COUNTY IN SOUTHEASTERN MISSOURI SOUTHERN MADISON COUNTY MISSOURI IN SOUTHEASTERN MISSOURI * UNTIL 525 AM CDT * AT AT 438 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES EAST OF ANNAPOLIS... MOVING EAST AT 40 MPH. * LOCATIONS THAT WILL BE AFFECTED... SACO BUCKHORN SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND GUSTS IN EXCESS OF 60 MPH...DAMAGING HAIL...DEADLY LIGHTNING...A2ND 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
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, Jun 20, 4:30 AM CDT, 9 minutes before
ILZ058>060-064-065-069-070-074-079-097>102-KSZ073-097-101-MOZ026-027- 034>036-041-042-047>052-055>075-077>085-088>092-094-098-099-201130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 430 AM CDT SAT JUN 20 1998 ...THE SEVERE THUNDERSTORM WATCH FOR PORTIONS OF CENTRAL...EAST CENTRAL...SOUTHWEST AND SOUTH CENTRAL MISSOURI ALONG WITH SOUTHWEST ILLINOIS HAS EXPIRED... SCATTERED STRONG THUNDERSTORMS CONTINUED ACROSS PORTIONS OF MISSOURI AND SOUTHWEST ILLINOIS EARLY THIS MORNING...HOWEVER THE THREAT OF SEVERE THUNDERSTORMS WITH LARGE HAIL AND DAMAGING WINDS HAS DIMINISHED. TPS
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, 3:34 AM CDT | Severe Thunderstorm Warning | LSX | Jefferson, Saint Louis | 51 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 |
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.