Alert archive / Missouri / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 29, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Feb 11, 1999, 2:47 PM CST for Madison County, Illinois; Saint Louis County, City of Saint Louis, Missouri. It was in force for 48 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
- Feb 11, 1999, 2:47 PM CST (20:47 UTC)
- Expired
- Feb 11, 1999, 3:35 PM CST
- In force
- 48 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
Counties Madison County, IL, City of Saint Louis, MO, Saint Louis County, MO
The radar
The St Louis radar (KLSX), 43 km from the middle of the area, began a volume at 20:48 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 |
|---|---|---|---|
| Feb 11, 3:15 PM CST | Thunderstorm Wind 55 | St Jacob, IL |
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 |
|---|---|---|---|
| Feb 11, 11:15 AM CST | Severe Thunderstorm Watch | SPC | 7 hr |
| Feb 11, 2:30 PM CST | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 8.8 hours before the alert went out and 211 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
- 394 J/kg
- Mixed-layer CIN
- -231 J/kg
- Mixed-layer LCL
- 746 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 293 m²/s²
- 0-3 km storm-relative helicity
- 310 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSTL 112046 SVRSTL ILC119-MOC189-510-112135- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 247 PM CST THU FEB 11 1999 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... MADISON COUNTY ILLINOIS IN SOUTHWESTERN ILLINOIS ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI ST. LOUIS CITY IN EAST CENTRAL MISSOURI * UNTIL 335 PM CST * AT 244 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS ACROSS WEST CENTRAL ST LOUIS COUNTY. ...MOVING EAST AT 40 MPH. * LOCATIONS THAT WILL BE AFFECTED... ST LOUIS CITY GRANITE CITY FERGUSON EDWARDSVILLE THE PRIMARY SEVERbE WEATHER THREAT IS DAMAGING WINDS. MOVE QUICKLY TO A STURDY BUILDING AND STAY AWAY FROM DOORS AND WINDOWS. GKS/RP
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, Feb 11, 10:25 AM CST, 4 hours 22 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>075-084-085-099-112300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 1025 AM CST THU FEB 11 1999 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 THROUGH EARLY THIS EVENING ACROSS THE ENTIRE REGION. THIS INCLUDES THE LARGER CITIES OF ST LOUIS...COLUMBIA...JEFFERSON CITY... HANNIBAL...FARMINGTON...STE GENEVIEVE...QUINCY IL...VANDALIA IL...AND CENTRALIA IL. A LINE OF STRONG TO SEVERE THUNDERSTORMS IS EXPECTED TO PUSH WEST TO EAST ACROSS THE AREA. THE MAIN SEVERE WEATHER THREAT WITH THIS LINE OF STORMS WILL BE DAMAGING WIND GUSTS IN EXCESS OF 60 MPH. THE THREAT OVER CENTRAL MISSOURI SHOULD BE EARLY THIS AFTERNOON...OVER EASTERN MISSOURI AROUND MIDDLE AFTERNOON... AND OVER WESTERN ILLINOIS DURING THE LATE AFTERNOON AND EARLY EVENING. STORM SPOTTER GROUPS AND EMERGENCY MANAGERS SHOULD KEEP ADVISED OF THE LATEST FORECASTS...AND MONITOR WEATHER INFORMATION FOR POSSIhBLE SKYWARN ACTION. GLASS
Special weather statement, Feb 11, 1:51 PM CST, 56 minutes before
MOZ009-010-018-019-026-027-034-041-042-047>050-112054- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 151 PM CST THU FEB 11 1999 SEVERE THUNDERSTORM WATCH NUMBER 45 HAS BEEN CANCELLED FOR, THE FOLLOWING COUNTIES IN MISSOURI... SCOTLAND...CLARK...KNOX...LEWIS...SHELBY...MARION...MONROE... AUDRAIN...BOONE...CALLAWAY...MONITEAU...COLE...OSAGE THE SEVERE THUNDERSTORMS HAVE MOVED EAST OF THESE COUNTIES. SDT
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 11, 12:22 PM CST | Severe Thunderstorm Warning | LSX | Adams | 48 min |
| Feb 11, 1:54 PM CST | Tornado Warning | LSX | Brown | 46 min |
| Feb 11, 1:56 PM CST | Tornado Warning | LSX | Calhoun | 49 min |
| Feb 11, 2:09 PM CST | Tornado Warning | LSX | Greene | 51 min |
| Feb 11, 2:12 PM CST | Tornado Warning | LSX | Pike | 48 min |
| Feb 11, 4:24 PM CST | Severe Thunderstorm Warning | LSX | Fayette | 51 min |
| Feb 11, 4:37 PM CST | Severe Thunderstorm Warning | LSX | Marion | 48 min |
| Feb 11, 11:10 AM CST | Severe Thunderstorm Warning | LSX | Knox, Scotland | 50 min |
| Feb 11, 11:28 AM CST | Severe Thunderstorm Warning | LSX | Clark | 47 min |
| Feb 11, 11:31 AM CST | Severe Thunderstorm Warning | LSX | Monroe, Shelby | 64 min |
| Feb 11, 11:54 AM CST | Severe Thunderstorm Warning | LSX | Lewis | 46 min |
| Feb 11, 12:02 PM CST | Severe Thunderstorm Warning | LSX | Marion | 48 min |
| Feb 11, 12:04 PM CST | Severe Thunderstorm Warning | LSX | Boone | 51 min |
| Feb 11, 12:25 PM CST | Severe Thunderstorm Warning | LSX | Audrain, Callaway | 50 min |
| Feb 11, 12:46 PM CST | Severe Thunderstorm Warning | LSX | Osage | 49 min |
| Feb 11, 1:12 PM CST | Severe Thunderstorm Warning | LSX | Gasconade | 48 min |
| Feb 11, 1:26 PM CST | Severe Thunderstorm Warning | LSX | Franklin | 49 min |
| Feb 11, 1:35 PM CST | Severe Thunderstorm Warning | LSX | Franklin, Warren | 50 min |
| Feb 11, 1:48 PM CST | Tornado Warning | LSX | Lincoln | 47 min |
Nearby
Severe Thunderstorm Warnings in Missouri, 1999Severe Thunderstorm Warnings in Illinois, 1999Every severe thunderstorm warning in 1999
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.