Alert archive / Illinois / Tornado Warnings in 2021
Tornado Warning 8, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at May 27, 2021, 12:26 PM CDT for Macoupin County, Madison County, Illinois. It was in force for 34 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 27, 2021, 12:26 PM CDT (17:26 UTC)
- Expired
- May 27, 2021, 1:00 PM CDT
- In force
- 34 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Macoupin County, IL, Madison County, IL
The radar
The St Louis radar (KLSX), 59 km from the middle of the area, began a volume at 17:27 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 |
|---|---|---|---|
| May 27, 12:27 PM CDT | TSTM WND DMG | 1 S Godfrey, IL | NUMEROUS TREE LIMBS AND SEVERAL TREES BLOWN DOWN ON THE SOUTH SIDE OF GODFREY. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
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, 5.4 hours before the alert went out and 183 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.
180
WFUS53 KLSX 271726
TORLSX
ILC117-119-271800-
/O.NEW.KLSX.TO.W.0008.210527T1726Z-210527T1800Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
1226 PM CDT Thu May 27 2021
The National Weather Service in St Louis has issued a
* Tornado Warning for...
Northwestern Madison County in southwestern Illinois...
Southern Macoupin County in southwestern Illinois...
* Until 100 PM CDT.
* At 1225 PM CDT, a severe thunderstorm capable of producing a
tornado was located over Godfrey, moving east at 40 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...
Rosewood Heights around 1230 PM CDT.
Bethalto around 1235 PM CDT.
Dorsey around 1240 PM CDT.
Bunker Hill and Prairietown around 1245 PM CDT.
Other locations in the path of this tornadic thunderstorm include
Worden, Staunton, Wilsonville, Mount Clare, Benld, Sawyerville and
Eagarville.
This includes Interstate 55 in Illinois near exit 33.
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 3889 9020 3890 9021 3898 9022 3900 9016
3900 9015 3901 9015 3914 8978 3892 8978
TIME...MOT...LOC 1725Z 256DEG 34KT 3895 9016
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
MRM3 follow-up statements
805
WWUS53 KLSX 271732
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
1232 PM CDT Thu May 27 2021
ILC117-119-271800-
/O.CON.KLSX.TO.W.0008.000000T0000Z-210527T1800Z/
Madison IL-Macoupin IL-
1232 PM CDT Thu May 27 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 100 PM CDT FOR
NORTHWESTERN MADISON AND SOUTHERN MACOUPIN COUNTIES IN SOUTHWESTERN
ILLINOIS...
At 1232 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Brighton, moving east at 35 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Dorsey around 1240 PM CDT.
Bunker Hill and Prairietown around 1245 PM CDT.
Other locations in the path of this tornadic thunderstorm include
Worden, Wilsonville, Staunton, Gillespie, Benld, Sawyerville, Mount
Clare and Eagarville.
This includes Interstate 55 in Illinois near exit 33.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 3900 9016 3900 9015 3901 9015 3914 8978
3893 8978 3891 9015
TIME...MOT...LOC 1732Z 251DEG 31KT 3898 9010
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
MRM772
WWUS53 KLSX 271740
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
1240 PM CDT Thu May 27 2021
ILC117-119-271800-
/O.CON.KLSX.TO.W.0008.000000T0000Z-210527T1800Z/
Madison IL-Macoupin IL-
1240 PM CDT Thu May 27 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 100 PM CDT FOR NORTH
CENTRAL MADISON AND SOUTHEASTERN MACOUPIN COUNTIES IN SOUTHWESTERN
ILLINOIS...
At 1240 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Dorsey, 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...
Bunker Hill around 1245 PM CDT.
Prairietown around 1250 PM CDT.
Other locations in the path of this tornadic thunderstorm include
Worden, Wilsonville, Staunton, Benld, Sawyerville, Mount Clare and
Eagarville.
This includes Interstate 55 in Illinois near exit 33.
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 3914 8978 3893 8978 3891 9008 3903 9009
TIME...MOT...LOC 1740Z 260DEG 32KT 3898 9001
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
MRM149
WWUS53 KLSX 271750
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
1250 PM CDT Thu May 27 2021
ILC117-119-271800-
/O.CON.KLSX.TO.W.0008.000000T0000Z-210527T1800Z/
Madison IL-Macoupin IL-
1250 PM CDT Thu May 27 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 100 PM CDT FOR NORTH
CENTRAL MADISON AND SOUTHEASTERN MACOUPIN COUNTIES IN SOUTHWESTERN
ILLINOIS...
At 1250 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Prairietown, moving east at 35 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Staunton, Wilsonville and Mount Clare around 100 PM CDT.
Other locations in the path of this tornadic thunderstorm include
Benld, Sawyerville and Eagarville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 3911 8978 3894 8978 3894 8997 3904 8998
TIME...MOT...LOC 1750Z 258DEG 30KT 3900 8992
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
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, 12:39 PM CDT | Areal Flood Advisory | LSX | Calhoun, Madison | 3 hr |
| May 27, 12:56 PM CDT | Tornado Warning | LSX | Bond, Macoupin, Madison, Montgomery | 28 min |
| 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.