Alert archive / Illinois / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 59, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jun 19, 2021, 10:45 AM CDT for Macoupin County, Montgomery County, Illinois. It was in force for 45 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 19, 2021, 10:45 AM CDT (15:45 UTC)
- Expired
- Jun 19, 2021, 11:30 AM CDT
- In force
- 45 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Macoupin County, IL, Montgomery County, IL
The radar
The Lincoln radar (KILX), 90 km from the middle of the area, began a volume at 15:46 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 12:00Z, 3.8 hours before the alert went out and 127 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
- 1960 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 142 m²/s²
- 0-3 km storm-relative helicity
- 203 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
937
WUUS53 KLSX 191545
SVRLSX
ILC117-135-191630-
/O.NEW.KLSX.SV.W.0059.210619T1545Z-210619T1630Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
1045 AM CDT Sat Jun 19 2021
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Northern Macoupin County in southwestern Illinois...
Northwestern Montgomery County in south central Illinois...
* Until 1130 AM CDT.
* At 1045 AM CDT, a severe thunderstorm was located near Waverly,
moving southeast at 40 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, Girard, Raymond, White Oak, Farmersville, Palmyra,
Waggoner, Nilwood, Harvel, Modesto, Standard City, Scottville,
Atwater and Honey Bend.
This includes Interstate 55 in Illinois between exits 60 and 63.
This also includes Lake Lou Yaeger.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3921 8962 3950 9016 3952 9015 3952 8956
3951 8953 3935 8953 3935 8951
TIME...MOT...LOC 1545Z 302DEG 34KT 3955 8990
HAIL...1.00IN
WIND...60MPH
$$
Byrd2 follow-up statements
700
WWUS53 KLSX 191611
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
1111 AM CDT Sat Jun 19 2021
ILC117-135-191630-
/O.CON.KLSX.SV.W.0059.000000T0000Z-210619T1630Z/
Macoupin IL-Montgomery IL-
1111 AM CDT Sat Jun 19 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 AM CDT
FOR NORTHERN MACOUPIN AND NORTHWESTERN MONTGOMERY COUNTIES...
At 1111 AM CDT, a severe thunderstorm was located near Virden, moving
southeast at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Virden, Girard, Raymond, White Oak, Farmersville, Palmyra, Waggoner,
Nilwood, Harvel, Modesto, Standard City, Scottville, Atwater and
Honey Bend.
This also includes Lake Lou Yaeger.
This includes Interstate 55 in Illinois between exits 60 and 63.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3921 8962 3950 9016 3952 9015 3952 8956
3951 8953 3935 8953 3935 8951
TIME...MOT...LOC 1611Z 296DEG 32KT 3953 8983
HAIL...1.00IN
WIND...60MPH
$$
Byrd753
WWUS53 KLSX 191629
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
1129 AM CDT Sat Jun 19 2021
ILC117-135-191639-
/O.EXP.KLSX.SV.W.0059.000000T0000Z-210619T1630Z/
Macoupin IL-Montgomery IL-
1129 AM CDT Sat Jun 19 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN MACOUPIN AND
NORTHWESTERN MONTGOMERY COUNTIES WILL EXPIRE AT 1130 AM CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However small
hail, gusty winds and heavy rain are still possible with this
thunderstorm.
LAT...LON 3921 8962 3950 9016 3952 9015 3952 8956
3951 8953 3935 8953 3935 8951
TIME...MOT...LOC 1629Z 302DEG 34KT 3944 8965
$$
ByrdThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 5:44 AM CDT | Severe Thunderstorm Warning | LSX | Marion | 18 min |
| Jun 19, 2:15 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Greene, Jersey | 31 min |
| Jun 19, 2:44 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Greene, Jersey | 32 min |
| Jun 19, 2:52 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 38 min |
| Jun 19, 2:55 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Greene, Jersey | 50 min |
| Jun 19, 3:21 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Greene, Pike | 25 min |
| Jun 19, 3:31 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Jersey | 44 min |
| Jun 19, 4:10 PM CDT | Flash Flood Warning | LSX | Calhoun | 6 hr |
| Jun 19, 4:16 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Jersey, Madison | 44 min |
| Jun 19, 4:35 PM CDT | Flash Flood Warning | LSX | Calhoun, Greene, Jersey | 6 hr |
| Jun 19, 4:43 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun | 47 min |
| Jun 19, 5:17 PM CDT | Severe Thunderstorm Warning | LSX | Saint Clair | 43 min |
| Jun 19, 5:25 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Saint Clair | 35 min |
| Jun 19, 6:00 PM CDT | Severe Thunderstorm Warning | LSX | Monroe | 45 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.