Alert archive / Illinois / Tornado Warnings in 1999
Tornado Warning 2, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Feb 11, 1999, 1:54 PM CST for Brown County, Illinois. It was in force for 46 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, 1:54 PM CST (19:54 UTC)
- Expired
- Feb 11, 1999, 2:40 PM CST
- In force
- 46 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Brown County, IL
The radar
The Lincoln radar (KILX), 122 km from the middle of the area, began a volume at 19:55 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, 2:00 PM CST | Thunderstorm Wind 55 | Mt Sterling, IL | |
| Feb 11, 2:00 PM CST | Hail 1 | Mt Sterling, 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 |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 7.9 hours before the alert went out and 184 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 111953 TORSTL ILC009-112040- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 154 PM CST THU FEB 11 1999 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * TORNADO WARNING FOR... BROWN COUNTY IN WEST CENTRAL ILLINOIS * UNTIL 240 PM CST * AT 151 PM... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO IN SOUTHWESTERN BROWN COUNTY 5 MILES SOUTH OF BUCKHORN... MOVING NORTHEAST AT 45 MPH. * LOCATIONS IN THE PATH... MT STERLING BUCKHORN VERSAILLES IF YOU ARE IN THE PATH OF THIS STORM...SEEK SHELTER NOW! A BASEMENT OFFERS THE BEST PROTECTION. IF NOT AVAILABLE...MOVE TO THE LOWEST FLOOR AND SEEK SHELTER IN A SMALL INTERIOR ROOM(. STAY AWAY FROM OUTSIDE WALLS AND WINDOWS. MOBILE HOMES SHOULD BE ABANDONED IN FAVOR OF A MORE SUBSTANTIAL STRUCTURE. DO NOT TRY TO OUTRUN A TORNADO IN A VEHICLE 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, 12:22 PM CST | Severe Thunderstorm Warning | LSX | Adams | 48 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, 2:47 PM CST | Severe Thunderstorm Warning | LSX | Madison | 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 |
Nearby
Tornado Warnings in Illinois, 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.