Alert archive / Illinois / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 93, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jun 24, 2021, 8:11 PM CDT for Macoupin County, Illinois. It was in force for 49 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
- Jun 24, 2021, 8:11 PM CDT (01:11 UTC)
- Expired
- Jun 24, 2021, 9:00 PM CDT
- In force
- 49 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Macoupin County, IL
The radar
The Lincoln radar (KILX), 86 km from the middle of the area, began a volume at 01:10 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 nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 1.2 hours before the alert went out and 128 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
- 263 J/kg
- Mixed-layer CIN
- -103 J/kg
- Mixed-layer LCL
- 875 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 245 m²/s²
- 0-3 km storm-relative helicity
- 444 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 3.5
The text
As transmitted.
030
WUUS53 KLSX 250111
SVRLSX
ILC117-250200-
/O.NEW.KLSX.SV.W.0093.210625T0111Z-210625T0200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
811 PM CDT Thu Jun 24 2021
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Northeastern Macoupin County in southwestern Illinois...
* Until 900 PM CDT.
* At 811 PM CDT, a severe thunderstorm was located near Waverly,
moving east at 15 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Virden and Girard.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3944 8970 3946 8999 3952 9000 3952 8970
TIME...MOT...LOC 0111Z 271DEG 11KT 3954 8992
HAIL...1.00IN
WIND...60MPH
$$
MRM3 follow-up statements
981
WWUS53 KLSX 250126
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
826 PM CDT Thu Jun 24 2021
ILC117-250200-
/O.CON.KLSX.SV.W.0093.000000T0000Z-210625T0200Z/
Macoupin IL-
826 PM CDT Thu Jun 24 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR NORTHEASTERN MACOUPIN COUNTY...
At 826 PM CDT, a severe thunderstorm was located over Virden, moving
east at 10 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Virden and Girard.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3944 8970 3946 8987 3952 8991 3952 8970
TIME...MOT...LOC 0126Z 261DEG 9KT 3954 8979
HAIL...1.00IN
WIND...60MPH
$$
MRM272
WWUS53 KLSX 250144
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
844 PM CDT Thu Jun 24 2021
ILC117-250200-
/O.CON.KLSX.SV.W.0093.000000T0000Z-210625T0200Z/
Macoupin IL-
844 PM CDT Thu Jun 24 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR NORTHEASTERN MACOUPIN COUNTY...
At 844 PM CDT, a severe thunderstorm was located over Virden, moving
east at 10 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Virden.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3944 8970 3947 8981 3952 8984 3952 8970
TIME...MOT...LOC 0144Z 275DEG 7KT 3953 8973
TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
$$
MRM872
WWUS53 KLSX 250159
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
859 PM CDT Thu Jun 24 2021
ILC117-250209-
/O.EXP.KLSX.SV.W.0093.000000T0000Z-210625T0200Z/
Macoupin IL-
859 PM CDT Thu Jun 24 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MACOUPIN COUNTY
WILL EXPIRE AT 900 PM CDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
LAT...LON 3944 8970 3947 8981 3952 8984 3952 8970
TIME...MOT...LOC 0159Z 271DEG 11KT 3953 8967
$$
MRMThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 24, 8:42 PM CDT | Severe Thunderstorm Warning | LSX | Montgomery | 47 min |
| Jun 24, 11:29 PM CDT | Severe Thunderstorm Warning | LSX | Adams, Pike | 46 min |
| Jun 25, 12:03 AM CDT | Tornado Warning | LSX | Adams, Pike | 42 min |
| Jun 25, 12:17 AM CDT | Severe Thunderstorm Warning | LSX | Adams, Brown, Calhoun, Pike | 43 min |
| Jun 25, 12:57 AM CDT | Severe Thunderstorm Warning | LSX | Brown, Calhoun, Greene, Jersey, Pike | 48 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2021Every severe thunderstorm warning 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.