Alert archive / Illinois / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 35, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 3, 2021, 6:13 PM CDT for Greene County, Macoupin County, Illinois. It was in force for 47 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 3, 2021, 6:13 PM CDT (23:13 UTC)
- Expired
- May 3, 2021, 7:00 PM CDT
- In force
- 47 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Greene County, IL, Macoupin County, IL
The radar
The Lincoln radar (KILX), 94 km from the middle of the area, began a volume at 23:13 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 3, 2:47 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 11.2 hours before the alert went out and 136 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
- 460 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 44 m²/s²
- 0-3 km storm-relative helicity
- 56 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
632
WUUS53 KLSX 032313
SVRLSX
ILC061-117-040000-
/O.NEW.KLSX.SV.W.0035.210503T2313Z-210504T0000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
613 PM CDT Mon May 3 2021
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Northeastern Greene County in southwestern Illinois...
Northern Macoupin County in southwestern Illinois...
* Until 700 PM CDT.
* At 613 PM CDT, a severe thunderstorm was located over Athensville,
moving east 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, Palmyra, Athensville, Nilwood, Modesto, Standard
City, Scottville and Atwater.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3935 8970 3935 8971 3933 8970 3938 9025
3952 9021 3952 8970
TIME...MOT...LOC 2313Z 269DEG 32KT 3947 9015
HAIL...1.00IN
WIND...60MPH
$$
Glass2 follow-up statements
524
WWUS53 KLSX 032322
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
622 PM CDT Mon May 3 2021
ILC061-032331-
/O.CAN.KLSX.SV.W.0035.000000T0000Z-210504T0000Z/
Greene IL-
622 PM CDT Mon May 3 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN GREENE COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
south central and southwestern Illinois.
LAT...LON 3935 8970 3935 8971 3933 8970 3937 9015
3952 9015 3952 8970
TIME...MOT...LOC 2321Z 269DEG 32KT 3947 9005
$$
ILC117-040000-
/O.CON.KLSX.SV.W.0035.000000T0000Z-210504T0000Z/
Macoupin IL-
622 PM CDT Mon May 3 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR NORTHERN MACOUPIN COUNTY...
At 621 PM CDT, a severe thunderstorm was located near Palmyra, moving
east 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, Palmyra, Nilwood, Modesto, Standard City, Scottville
and Atwater.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3935 8970 3935 8971 3933 8970 3937 9015
3952 9015 3952 8970
TIME...MOT...LOC 2321Z 269DEG 32KT 3947 9005
HAIL...1.00IN
WIND...60MPH
$$
Glass789
WWUS53 KLSX 032333
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
633 PM CDT Mon May 3 2021
ILC117-040000-
/O.CON.KLSX.SV.W.0035.000000T0000Z-210504T0000Z/
Macoupin IL-
633 PM CDT Mon May 3 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR NORTHEASTERN MACOUPIN COUNTY...
At 633 PM CDT, a severe thunderstorm was located near Palmyra, moving
east at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Virden, Girard, Nilwood, Modesto and Standard City.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3935 8970 3935 8971 3933 8970 3938 8998
3952 8998 3952 8970
TIME...MOT...LOC 2333Z 269DEG 32KT 3947 8991
HAIL...1.00IN
WIND...60MPH
$$
GlassThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 2:54 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 51 min |
| May 3, 3:27 PM CDT | Severe Thunderstorm Warning | LSX | Adams, Brown | 48 min |
| May 3, 4:13 PM CDT | Severe Thunderstorm Warning | LSX | Brown | 28 min |
| May 3, 6:32 PM CDT | Severe Thunderstorm Warning | LSX | Greene, Macoupin | 32 min |
| May 3, 6:45 PM CDT | Severe Thunderstorm Warning | LSX | Montgomery | 23 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.