Alert archive / Missouri / Tornado Warnings in 1999
Tornado Warning 18, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Apr 8, 1999, 6:48 PM CDT for Osage County, Missouri. It was in force for 47 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
- Apr 8, 1999, 6:48 PM CDT (23:48 UTC)
- Expired
- Apr 8, 1999, 7:35 PM CDT
- In force
- 47 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Osage County, MO
The radar
The St Louis radar (KLSX), 106 km from the middle of the area, began a volume at 23:49 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 |
|---|---|---|---|
| Apr 8, 7:00 PM CDT | Tornado F1 | Linn, 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 |
|---|---|---|---|
| Apr 8, 5:15 PM CDT | Tornado Watch | SPC | 4 hr |
The nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 11.8 hours before the alert went out and 243 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
- 1128 J/kg
- Mixed-layer CIN
- -214 J/kg
- Mixed-layer LCL
- 1102 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 121 m²/s²
- 0-3 km storm-relative helicity
- 120 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.8
The text
As transmitted, in the capitals the NWS used until 2016.
999 WFUS1 KSTL 082349 RRA TORSTL MOC151-090035- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 648 PM CDT THU APR 8 1999 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * TORNADO WARNING FOR... OSAGE COUNTY IN CENTRAL MISSOURI * UNTIL 735 PM CDT * AT 650 PM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO EASTERN COLE COUNTY NEAR THE TOWN OF BRAZITO... MOVING NORTHEAST AT 50 MPH. * LOCATIONS IN THE PATH... LINN WESTPHALIA RICH FOUNTAIN THIS IS A DANGEROUS SITUATION IF IN THE PATH...TAKE COVER NOW MOVE TO A BASEMENT IF AVAILABLE. IF NOT...STAY ON THE LOWEST LEVEL AND GO TO A SMALL INTERIOR ROOM. MOBILE HOMES AND AUTOMOBILESHOULD BE ABANDONED IN FAVOR OF A STRONG STRUCTURE. AS A LAST RESORT... MOVE TO A DITCH OR CULVERT AND COVER YOUR HEAD. TS/RP
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 8, 5:21 PM CDT | Tornado Warning | LSX | Knox, Shelby | 64 min |
| Apr 8, 5:46 PM CDT | Severe Thunderstorm Warning | LSX | Boone | 59 min |
| Apr 8, 5:50 PM CDT | Tornado Warning | LSX | Lewis | 50 min |
| Apr 8, 5:54 PM CDT | Tornado Warning | LSX | Boone | 51 min |
| Apr 8, 6:09 PM CDT | Tornado Warning | LSX | Clark | 46 min |
| Apr 8, 6:15 PM CDT | Tornado Warning | LSX | Cole | 50 min |
| Apr 8, 6:21 PM CDT | Tornado Warning | LSX | Audrain | 49 min |
| Apr 8, 6:34 PM CDT | Tornado Warning | LSX | Shelby | 46 min |
| Apr 8, 6:40 PM CDT | Tornado Warning | LSX | Lewis | 50 min |
| Apr 8, 6:52 PM CDT | Tornado Warning | LSX | Pike, Ralls | 48 min |
Nearby
Tornado Warnings in Missouri, 1999Every tornado warning in 1999Tornadoes 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.