Alert archive / Illinois / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 33, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 3, 2021, 3:27 PM CDT for Adams County, Brown County, Illinois. It was in force for 48 min. 4 reports 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 3, 2021, 3:27 PM CDT (20:27 UTC)
- Expired
- May 3, 2021, 4:15 PM CDT
- In force
- 48 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Adams County, IL, Brown County, IL
The radar
The Lincoln radar (KILX), 114 km from the middle of the area, began a volume at 20:30 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 3, 3:42 PM CDT | TSTM WND DMG | 2 Wsw Clayton, IL | LARGE TREE SNAPPED OFF. WINDS ESTIMATED BETWEEN 60 AND 70 MPH. |
| May 3, 4:06 PM CDT | HAIL 1.5 | Buckhorn, IL | PING PONG BALL SIZED HAIL REPORTED VIA TWITTER IN BUCKHORN, IL. |
| May 3, 4:07 PM CDT | HAIL 1.25 | 2 W Buckhorn, IL | REPORT FROM MPING: HALF DOLLAR (1.25 IN.). |
| May 3, 4:15 PM CDT | HAIL 1 | 2 Sse Mount Sterling, IL | QUARTER SIZED HAIL REPORTED AT THE WESTERN ILLINOIS CORRECTIONAL FACILITY. |
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 3, 2:47 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 8.5 hours before the alert went out and 176 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.
134
WUUS53 KLSX 032027
SVRLSX
ILC001-009-032115-
/O.NEW.KLSX.SV.W.0033.210503T2027Z-210503T2115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
327 PM CDT Mon May 3 2021
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
East central Adams County in west central Illinois...
Brown County in west central Illinois...
* Until 415 PM CDT.
* At 327 PM CDT, a severe thunderstorm was located near Quincy
Regional Airport, moving east at 45 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...
Mount Sterling, Camp Point, Clayton, Buckhorn, La Grange, Liberty,
Versailles, Mound Station, Ripley, Coopertown and Kellerville.
This also includes Siloam Springs State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4005 9068 4002 9063 4003 9061 4001 9062
4000 9060 3998 9060 3998 9054 3999 9052
3997 9051 3995 9053 3992 9054 3988 9058
3985 9059 3989 9113 4008 9110 4008 9067
TIME...MOT...LOC 2027Z 271DEG 39KT 3999 9115
HAIL...1.00IN
WIND...60MPH
$$
Glass4 follow-up statements
193
WWUS53 KLSX 032039
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
339 PM CDT Mon May 3 2021
ILC001-009-032115-
/O.CON.KLSX.SV.W.0033.000000T0000Z-210503T2115Z/
Adams IL-Brown IL-
339 PM CDT Mon May 3 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM CDT
FOR EAST CENTRAL ADAMS AND BROWN COUNTIES...
At 338 PM CDT, a severe thunderstorm was located near Clayton, moving
east at 55 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Trained weather spotters reported nearly half dollar size
hail 3 miles southwest of Coatsburg.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Mount Sterling, Camp Point, Clayton, Buckhorn, La Grange, Liberty,
Versailles, Mound Station, Ripley, Coopertown and Kellerville.
This also includes Siloam Springs State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4005 9068 4002 9063 4003 9061 4001 9062
4000 9060 3998 9060 3998 9054 3999 9052
3997 9051 3995 9053 3992 9054 3988 9058
3985 9059 3989 9113 4008 9110 4008 9067
TIME...MOT...LOC 2038Z 270DEG 46KT 4001 9101
HAIL...1.25IN
WIND...60MPH
$$
Glass180
WWUS53 KLSX 032050
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
350 PM CDT Mon May 3 2021
ILC001-009-032115-
/O.CON.KLSX.SV.W.0033.000000T0000Z-210503T2115Z/
Adams IL-Brown IL-
350 PM CDT Mon May 3 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM CDT
FOR EAST CENTRAL ADAMS AND BROWN COUNTIES...
At 350 PM CDT, a severe thunderstorm was located near Clayton, moving
east at 45 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Public reported tree damage between Clayton and Camp Point.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Mount Sterling, Camp Point, Clayton, Buckhorn, La Grange, Liberty,
Versailles, Mound Station, Ripley, Coopertown and Kellerville.
This also includes Siloam Springs State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4005 9068 4002 9063 4003 9061 4001 9062
4000 9060 3998 9060 3998 9054 3999 9052
3997 9051 3995 9053 3992 9054 3988 9058
3985 9059 3989 9113 4004 9111 4008 9067
TIME...MOT...LOC 2050Z 273DEG 39KT 4002 9090
HAIL...1.25IN
WIND...60MPH
$$
Glass743
WWUS53 KLSX 032059
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
359 PM CDT Mon May 3 2021
ILC001-009-032115-
/O.CON.KLSX.SV.W.0033.000000T0000Z-210503T2115Z/
Adams IL-Brown IL-
359 PM CDT Mon May 3 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM CDT
FOR EAST CENTRAL ADAMS AND BROWN COUNTIES...
At 359 PM CDT, a severe thunderstorm was located near Buckhorn,
moving east at 45 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Mount Sterling, Clayton, Buckhorn, La Grange, Versailles, Mound
Station, Ripley, Coopertown and Kellerville.
This also includes Siloam Springs State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4005 9068 4002 9063 4003 9061 4001 9062
4000 9060 3998 9060 3998 9054 3999 9052
3997 9051 3995 9053 3992 9054 3988 9058
3985 9059 3989 9108 4006 9093 4008 9067
TIME...MOT...LOC 2059Z 270DEG 40KT 3994 9094
HAIL...1.25IN
WIND...60MPH
$$
Glass488
WWUS53 KLSX 032105
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
405 PM CDT Mon May 3 2021
ILC001-032115-
/O.CAN.KLSX.SV.W.0033.000000T0000Z-210503T2115Z/
Adams IL-
405 PM CDT Mon May 3 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL ADAMS 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
west central Illinois.
LAT...LON 4005 9068 4002 9063 4003 9061 4001 9062
4000 9060 3998 9060 3998 9052 3999 9052
3997 9051 3995 9053 3992 9054 3989 9058
3985 9059 3988 9092 4006 9091 4008 9067
TIME...MOT...LOC 2105Z 271DEG 39KT 3994 9085
$$
ILC009-032115-
/O.CON.KLSX.SV.W.0033.000000T0000Z-210503T2115Z/
Brown IL-
405 PM CDT Mon May 3 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM CDT
FOR BROWN COUNTY...
At 405 PM CDT, a severe thunderstorm was located over Buckhorn,
moving east at 45 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Mount Sterling, Buckhorn, La Grange, Versailles, Mound Station,
Ripley and Coopertown.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4005 9068 4002 9063 4003 9061 4001 9062
4000 9060 3998 9060 3998 9052 3999 9052
3997 9051 3995 9053 3992 9054 3989 9058
3985 9059 3988 9092 4006 9091 4008 9067
TIME...MOT...LOC 2105Z 271DEG 39KT 3994 9085
HAIL...1.25IN
WIND...60MPH
$$
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, 4:13 PM CDT | Severe Thunderstorm Warning | LSX | Brown | 28 min |
| May 3, 6:13 PM CDT | Severe Thunderstorm Warning | LSX | Greene, Macoupin | 47 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.