Alert archive / Illinois / Tornado Warnings in 2021
Tornado Warning 9, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at May 27, 2021, 12:56 PM CDT for 4 counties in Illinois. It was in force for 28 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
- May 27, 2021, 12:56 PM CDT (17:56 UTC)
- Expired
- May 27, 2021, 1:24 PM CDT
- In force
- 28 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Bond County, IL, Macoupin County, IL, Madison County, IL, Montgomery County, IL
The radar
The St Louis radar (KLSX), 92 km from the middle of the area, began a volume at 17:57 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 |
|---|---|---|---|
| May 27, 11:26 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 5.9 hours before the alert went out and 157 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
- 1679 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 130 m²/s²
- 0-3 km storm-relative helicity
- 150 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
294
WFUS53 KLSX 271756
TORLSX
ILC005-117-119-135-271845-
/O.NEW.KLSX.TO.W.0009.210527T1756Z-210527T1845Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
1256 PM CDT Thu May 27 2021
The National Weather Service in St Louis has issued a
* Tornado Warning for...
Northwestern Bond County in south central Illinois...
Northeastern Madison County in southwestern Illinois...
Southeastern Macoupin County in southwestern Illinois...
Southwestern Montgomery County in south central Illinois...
* Until 145 PM CDT.
* At 1256 PM CDT, a severe thunderstorm capable of producing a
tornado was located near Staunton, moving east at 35 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 dangerous storm will be near...
Staunton and Mount Clare around 100 PM CDT.
Benld, Livingston, Sawyerville and Eagarville around 105 PM CDT.
Mount Olive around 110 PM CDT.
Other locations in the path of this tornadic thunderstorm include
Sorento, Reno, Hillsboro, Taylor Springs, Schram City and Coffeen.
This includes Interstate 55 in Illinois between exits 37 and 44.
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 3894 8992 3905 8995 3925 8936 3895 8937
TIME...MOT...LOC 1756Z 258DEG 30KT 3901 8986
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
MRM1 follow-up statement
357
WWUS53 KLSX 271824
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
124 PM CDT Thu May 27 2021
ILC005-117-119-135-271834-
/O.CAN.KLSX.TO.W.0009.000000T0000Z-210527T1845Z/
Bond IL-Madison IL-Macoupin IL-Montgomery IL-
124 PM CDT Thu May 27 2021
...THE TORNADO WARNING FOR NORTHWESTERN BOND COUNTY IN SOUTH CENTRAL
ILLINOIS...NORTHEASTERN MADISON...SOUTHEASTERN MACOUPIN COUNTIES IN
SOUTHWESTERN ILLINOIS AND SOUTHWESTERN MONTGOMERY COUNTIES IN SOUTH
CENTRAL ILLINOIS IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 700 PM CDT for
south central and southwestern Illinois.
LAT...LON 3894 8992 3905 8995 3925 8936 3895 8937
TIME...MOT...LOC 1821Z 258DEG 30KT 3906 8957
$$
MRMThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 27, 11:13 AM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Greene, Jersey | 47 min |
| May 27, 11:32 AM CDT | Severe Thunderstorm Warning | LSX | Greene, Macoupin | 43 min |
| May 27, 11:50 AM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Greene, Jersey, Macoupin, Madison, Saint Clair | 55 min |
| May 27, 12:07 PM CDT | Severe Thunderstorm Warning | LSX | Greene, Macoupin, Montgomery | 38 min |
| May 27, 12:26 PM CDT | Tornado Warning | LSX | Macoupin, Madison | 34 min |
| May 27, 12:39 PM CDT | Areal Flood Advisory | LSX | Calhoun, Madison | 3 hr |
| May 27, 2:16 PM CDT | Areal Flood Advisory | LSX | Bond, Fayette | 3 hr |
| May 27, 2:31 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Fayette, Marion | 44 min |
| May 27, 2:46 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Randolph | 29 min |
Nearby
Tornado Warnings in Illinois, 2021Every tornado warning in 2021Tornadoes in 2021
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.