Alert archive / Illinois / Tornado Warnings in 2023
Tornado Warning 31, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Aug 6, 2023, 4:33 PM CDT for Brown County, Illinois. It was in force for 13 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 6, 2023, 4:33 PM CDT (21:33 UTC)
- Expired
- Aug 6, 2023, 4:46 PM CDT
- In force
- 13 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
County Brown County, IL
The radar
The Lincoln radar (KILX), 108 km from the middle of the area, began a volume at 21:36 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 6, 3:16 PM CDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 9.6 hours before the alert went out and 170 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 749 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -98 m²/s²
- 0-3 km storm-relative helicity
- -85 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
304
WFUS53 KLSX 062133
TORLSX
ILC009-062200-
/O.NEW.KLSX.TO.W.0031.230806T2133Z-230806T2200Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
433 PM CDT Sun Aug 6 2023
The National Weather Service in St Louis has issued a
* Tornado Warning for...
Southeastern Brown County in west central Illinois...
* Until 500 PM CDT.
* At 433 PM CDT, a severe thunderstorm capable of producing a tornado
was located 7 miles southeast of Mount Sterling, moving east at 20
mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* This tornadic thunderstorm will remain over mainly rural areas of
southeastern Brown County, including the following locations...
Versailles, La Grange, and Coopertown.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4001 9062 4000 9060 3998 9060 3998 9052
3999 9053 3998 9051 3997 9051 3995 9053
3992 9054 3989 9058 3984 9058 3984 9070
4001 9072 4002 9061
TIME...MOT...LOC 2133Z 261DEG 19KT 3993 9064
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
Carney1 follow-up statement
426
WWUS53 KLSX 062146
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
446 PM CDT Sun Aug 6 2023
ILC009-062156-
/O.CAN.KLSX.TO.W.0031.000000T0000Z-230806T2200Z/
Brown IL-
446 PM CDT Sun Aug 6 2023
...THE TORNADO WARNING FOR SOUTHEASTERN BROWN COUNTY IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled. However, heavy rain is
still possible with this thunderstorm.
A Tornado Watch remains in effect until 1000 PM CDT for west central
Illinois.
LAT...LON 4001 9062 4000 9060 3998 9060 3998 9052
3999 9053 3998 9051 3997 9051 3995 9053
3992 9054 3989 9058 3984 9058 3984 9070
4001 9072 4002 9061
TIME...MOT...LOC 2144Z 261DEG 19KT 3994 9055
$$
CarneyThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 2:57 PM CDT | Tornado Warning | LSX | Adams, Brown | 63 min |
| Aug 6, 3:27 PM CDT | Tornado Warning | LSX | Brown | 48 min |
| Aug 6, 3:39 PM CDT | Tornado Warning | LSX | Adams | 34 min |
| Aug 6, 4:01 PM CDT | Areal Flood Advisory | LSX | Adams, Brown | 3 hr |
| Aug 6, 6:12 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Fayette | 48 min |
| Aug 6, 6:36 PM CDT | Tornado Warning | LSX | Fayette | 39 min |
| Aug 6, 6:48 PM CDT | Severe Thunderstorm Warning | LSX | Montgomery | 57 min |
| Aug 6, 6:51 PM CDT | Severe Thunderstorm Warning | LSX | Fayette | 24 min |
Nearby
Tornado Warnings in Illinois, 2023Every tornado warning in 2023Tornadoes in 2023
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.