Alert archive / Illinois / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 139, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Aug 8, 2021, 2:54 PM CDT for Adams County, Brown County, Pike County, Illinois. It was in force for 50 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
- Aug 8, 2021, 2:54 PM CDT (19:54 UTC)
- Expired
- Aug 8, 2021, 3:44 PM CDT
- In force
- 50 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, Pike County, IL
The radar
The Lincoln radar (KILX), 120 km from the middle of the area, began a volume at 19:57 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 |
|---|---|---|---|
| Aug 8, 12:44 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 7.9 hours before the alert went out and 182 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
- 310 J/kg
- Mixed-layer CIN
- -97 J/kg
- Mixed-layer LCL
- 1165 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- -25 m²/s²
- 0-3 km storm-relative helicity
- -3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
472
WUUS53 KLSX 081954
SVRLSX
ILC001-009-149-082100-
/O.NEW.KLSX.SV.W.0139.210808T1954Z-210808T2100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
254 PM CDT Sun Aug 8 2021
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Northern Pike County in west central Illinois...
Southeastern Adams County in west central Illinois...
Brown County in west central Illinois...
* Until 400 PM CDT.
* At 254 PM CDT, a severe thunderstorm was located over Barry, moving
northeast 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.
* This severe thunderstorm will be near...
Beverly around 305 PM CDT.
Other locations in the path of this severe thunderstorm include
Buckhorn and Mount Sterling.
This includes Interstate 72 near exit 20.
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.
To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in St Louis.
&&
LAT...LON 4010 9070 4009 9070 4008 9067 4005 9068
4002 9063 4003 9061 4001 9062 4000 9060
3998 9060 3998 9051 3992 9054 3988 9058
3983 9057 3970 9081 3959 9108 3964 9120
3990 9109 4011 9091
TIME...MOT...LOC 1954Z 221DEG 31KT 3969 9106
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Gosselin2 follow-up statements
946
WWUS53 KLSX 082024
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
324 PM CDT Sun Aug 8 2021
ILC001-082034-
/O.CAN.KLSX.SV.W.0139.000000T0000Z-210808T2100Z/
Adams IL-
324 PM CDT Sun Aug 8 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ADAMS COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 800 PM CDT for
west central Illinois.
LAT...LON 4002 9063 4003 9061 4001 9062 4000 9060
3998 9060 3998 9051 3992 9054 3988 9058
3983 9057 3970 9081 3962 9101 3976 9102
3976 9091 3992 9091 4005 9068
TIME...MOT...LOC 2024Z 221DEG 31KT 3989 9084
$$
ILC009-149-082100-
/O.CON.KLSX.SV.W.0139.000000T0000Z-210808T2100Z/
Pike IL-Brown IL-
324 PM CDT Sun Aug 8 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM CDT
FOR NORTHEASTERN PIKE AND BROWN COUNTIES IN WEST CENTRAL ILLINOIS...
At 324 PM CDT, a severe thunderstorm was located near Buckhorn,
moving northeast at 35 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Mount Sterling.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
St Louis.
&&
LAT...LON 4002 9063 4003 9061 4001 9062 4000 9060
3998 9060 3998 9051 3992 9054 3988 9058
3983 9057 3970 9081 3962 9101 3976 9102
3976 9091 3992 9091 4005 9068
TIME...MOT...LOC 2024Z 221DEG 31KT 3989 9084
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Gosselin240
WWUS53 KLSX 082044
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
344 PM CDT Sun Aug 8 2021
ILC009-149-082054-
/O.CAN.KLSX.SV.W.0139.000000T0000Z-210808T2100Z/
Pike IL-Brown IL-
344 PM CDT Sun Aug 8 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PIKE AND BROWN
COUNTIES IN WEST CENTRAL ILLINOIS IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 800 PM CDT for
west central Illinois.
LAT...LON 4002 9063 4003 9061 4001 9062 4000 9060
3998 9060 3998 9051 3992 9054 3988 9058
3983 9057 3970 9081 3962 9101 3976 9102
3976 9091 3992 9091 4005 9068
TIME...MOT...LOC 2041Z 221DEG 31KT 4002 9069
$$
GosselinThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 2:37 PM CDT | Heat Advisory | LSX | Adams, Bond, Brown, Calhoun, Clinton, Fayette and 11 more | 4 days |
| Aug 8, 3:54 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Greene, Jersey | 66 min |
| Aug 8, 4:35 PM CDT | Areal Flood Advisory | LSX | Adams, Pike | 3 hr |
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.