Alert archive / Missouri / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 21, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Feb 11, 1999, 12:02 PM CST for Marion County, Missouri. It was in force for 48 min. 2 reports 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, 12:02 PM CST (18:02 UTC)
- Expired
- Feb 11, 1999, 12:50 PM CST
- In force
- 48 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Marion County, MO
The radar
The St Louis radar (KLSX), 147 km from the middle of the area, began a volume at 18:04 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, 12:25 PM CST | Thunderstorm Wind 61 | Palmyra, MO | |
| Feb 11, 12:30 PM CST | Thunderstorm Wind 61 | Palmyra, 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 |
|---|---|---|---|
| Feb 11, 11:15 AM CST | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 6.0 hours before the alert went out and 223 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
- 263 J/kg
- Mixed-layer CIN
- -346 J/kg
- Mixed-layer LCL
- 653 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 395 m²/s²
- 0-3 km storm-relative helicity
- 310 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 111801 SVRSTL MOC127-111850- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 1202 PM CST THU FEB 11 1999 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... MARION COUNTY MISSOURI IN NORTHEASTERN MISSOURI * UNTIL 1250 PM CST * AT 1201 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS IN EASTERN SHELBY COUNTY NEAR SHELBINA... MOVING NORTHEAST AT 45 MPH. * LOCATIONS THAT WILL BE AFFECTED... PALMYRA PHILADELPHIA THE PRIMARY SEVERE WEATHER THREAT IS DAMAGING WINDS. MOVE QUICKLY TO A STURDY BUILDING AND STAY AWAY FROM DOORS AND WINDOWS. GKS/RP
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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, 12:04 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 |
| Feb 11, 1:56 PM CST | Tornado Warning | LSX | Pike | 49 min |
| Feb 11, 2:47 PM CST | Severe Thunderstorm Warning | LSX | Saint Louis, City of Saint Louis | 48 min |
Nearby
Severe Thunderstorm Warnings in Missouri, 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.