Alert archive / Missouri / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 167, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Sep 20, 2021, 10:35 PM CDT for Marion County, Pike County, Ralls County, Missouri; Adams County, Pike County, Illinois. It was in force for 40 min. 1 report 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
- Sep 20, 2021, 10:35 PM CDT (03:35 UTC)
- Expired
- Sep 20, 2021, 11:15 PM CDT
- In force
- 40 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Adams County, IL, Pike County, IL, Marion County, MO, Pike County, MO, Ralls County, MO
The radar
The St Louis radar (KLSX), 108 km from the middle of the area, began a volume at 03:35 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 |
|---|---|---|---|
| Sep 20, 11:00 PM CDT | TSTM WND DMG | 2 N Bowling Green, MO | TREE BLOWN DOWN ONTO CAR. REPORTED BY BOWLING GREEN PD. TIME ESTIMATED BY RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 3.6 hours before the alert went out and 223 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
- 766 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 1264 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 57 m²/s²
- 0-3 km storm-relative helicity
- 108 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.6
The text
As transmitted.
827
WUUS53 KLSX 210335
SVRLSX
ILC001-149-MOC127-163-173-210415-
/O.NEW.KLSX.SV.W.0167.210921T0335Z-210921T0415Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
1035 PM CDT Mon Sep 20 2021
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Pike County in west central Illinois...
Southeastern Adams County in west central Illinois...
Northern Ralls County in northeastern Missouri...
Southeastern Marion County in northeastern Missouri...
Northwestern Pike County in northeastern Missouri...
* Until 1115 PM CDT.
* At 1035 PM CDT, severe thunderstorms were located along a line
extending from near Monroe City to near Center to near Vandalia,
moving east at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Severe thunderstorms will be near...
Curryville and Spencerburg around 1045 PM CDT.
New London, Frankford, Rensselaer and Spaulding around 1050 PM
CDT.
Tarrants around 1055 PM CDT.
Other locations in the path of these severe thunderstorms include
Hannibal, Fall Creek, Louisiana, Payson, Pike, Barry, Pleasant Hill
and Atlas.
This includes the following highways...
Interstate 172 near exit 2.
Interstate 72 between exits 4 and 35.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3971 9077 3944 9065 3932 9143 3950 9147
3966 9172 3993 9103
TIME...MOT...LOC 0335Z 251DEG 41KT 3962 9172 3950 9158 3937 9152
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Britt2 follow-up statements
418
WWUS53 KLSX 210400
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
1100 PM CDT Mon Sep 20 2021
ILC001-149-MOC127-163-173-210415-
/O.CON.KLSX.SV.W.0167.000000T0000Z-210921T0415Z/
Pike IL-Adams IL-Ralls MO-Marion MO-Pike MO-
1100 PM CDT Mon Sep 20 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT
FOR PIKE AND SOUTHEASTERN ADAMS COUNTIES IN WEST CENTRAL ILLINOIS...
NORTHEASTERN RALLS...SOUTHEASTERN MARION AND NORTHWESTERN PIKE
COUNTIES IN NORTHEASTERN MISSOURI...
At 1100 PM CDT, severe thunderstorms were located along a line
extending from near Hannibal to 7 miles northeast of Frankford to
near Tarrants, moving east at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Louisiana, Payson, Pike, Barry, Pleasant Hill, Atlas, Beverly and
Pittsfield.
This includes the following highways...
Interstate 172 near exit 2.
Interstate 72 between exits 4 and 35.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3971 9077 3944 9065 3934 9133 3954 9139
3972 9157 3993 9103
TIME...MOT...LOC 0400Z 251DEG 43KT 3971 9134 3959 9124 3941 9121
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Britt212
WWUS53 KLSX 210415
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
1115 PM CDT Mon Sep 20 2021
ILC001-149-MOC127-163-173-210425-
/O.EXP.KLSX.SV.W.0167.000000T0000Z-210921T0415Z/
Pike IL-Adams IL-Ralls MO-Marion MO-Pike MO-
1115 PM CDT Mon Sep 20 2021
...THE SEVERE THUNDERSTORM WARNING FOR PIKE AND SOUTHEASTERN ADAMS
COUNTIES IN WEST CENTRAL ILLINOIS...NORTHEASTERN RALLS...SOUTHEASTERN
MARION AND NORTHWESTERN PIKE COUNTIES IN NORTHEASTERN MISSOURI HAS
EXPIRED...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been allowed to expire.
LAT...LON 3971 9077 3944 9065 3934 9133 3954 9139
3972 9157 3993 9103
TIME...MOT...LOC 0415Z 251DEG 41KT 3976 9114 3964 9104 3946 9101
$$
BrittThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 20, 8:45 PM CDT | Severe Thunderstorm Warning | LSX | Knox, Lewis | 45 min |
| Sep 20, 9:56 PM CDT | Severe Thunderstorm Warning | LSX | Audrain, Monroe, Ralls | 51 min |
Nearby
Severe Thunderstorm Warnings in Missouri, 2021Severe 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.