Alert archive / Missouri / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 118, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jul 9, 2021, 9:10 PM CDT for Adams County, Illinois; 4 counties in Missouri. It was in force for 65 min. 2 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
- Jul 9, 2021, 9:10 PM CDT (02:10 UTC)
- Expired
- Jul 9, 2021, 10:15 PM CDT
- In force
- 65 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 1.25 in
- Wind
- 60.0 mph
Counties Adams County, IL, Knox County, MO, Lewis County, MO, Marion County, MO, Shelby County, MO
The radar
The St Louis radar (KLSX), 160 km from the middle of the area, began a volume at 02:11 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 |
|---|---|---|---|
| Jul 9, 9:23 PM CDT | TSTM WND DMG | 5 Wnw Palmyra, MO | REPORTS OF TREES DOWN ACROSS MULTIPLE COUNTY ROADS. TIME AND LOCATION ESTIMATED FROM RADAR. |
| Jul 9, 9:30 PM CDT | TSTM WND DMG | Ewing, MO | SEVERAL LARGE TREE LIMBS WERE BLOWN DOWN AROUND TOWN. PICTURE FROM WGEM. |
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 |
|---|---|---|---|
| Jul 9, 8:18 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 2.2 hours before the alert went out and 212 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
- 1111 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 114 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
106
WUUS53 KLSX 100210
SVRLSX
ILC001-MOC103-111-127-205-100315-
/O.NEW.KLSX.SV.W.0118.210710T0210Z-210710T0315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
910 PM CDT Fri Jul 9 2021
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Southwestern Adams County in west central Illinois...
Southeastern Knox County in northeastern Missouri...
Marion County in northeastern Missouri...
Northeastern Shelby County in northeastern Missouri...
Lewis County in northeastern Missouri...
* Until 1015 PM CDT.
* At 909 PM CDT, a severe thunderstorm was located over Lewistown,
moving southeast at 20 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.
* This severe thunderstorm will be near...
Ewing around 925 PM CDT.
Other locations in the path of this severe thunderstorm include
Maywood, Philadelphia and Palmyra.
This includes Interstate 172 near exit 2.
This also includes Wakonda State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 200 AM CDT for west central
Illinois...and northeastern Missouri.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3976 9126 3973 9202 4018 9217 4019 9153
TIME...MOT...LOC 0209Z 328DEG 19KT 4008 9176
TORNADO...POSSIBLE
HAIL...1.25IN
WIND...60MPH
$$
Elmore3 follow-up statements
901
WWUS53 KLSX 100239
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
939 PM CDT Fri Jul 9 2021
ILC001-MOC103-111-127-205-100315-
/O.CON.KLSX.SV.W.0118.000000T0000Z-210710T0315Z/
Adams IL-Knox MO-Marion MO-Shelby MO-Lewis MO-
939 PM CDT Fri Jul 9 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT
FOR SOUTHWESTERN ADAMS...SOUTHEASTERN KNOX...MARION...NORTHEASTERN
SHELBY AND SOUTHERN LEWIS COUNTIES...
At 939 PM CDT, a severe thunderstorm was located over Maywood, moving
southeast at 20 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Philadelphia and Palmyra.
This also includes Wakonda State Park.
This includes Interstate 172 near exit 2.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 200 AM CDT for west central
Illinois...and northeastern Missouri.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3976 9126 3973 9202 4004 9212 4004 9144
TIME...MOT...LOC 0239Z 328DEG 19KT 3994 9165
TORNADO...POSSIBLE
HAIL...1.25IN
WIND...60MPH
$$
Elmore590
WWUS53 KLSX 100253
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
953 PM CDT Fri Jul 9 2021
MOC103-111-100302-
/O.CAN.KLSX.SV.W.0118.000000T0000Z-210710T0315Z/
Knox MO-Lewis MO-
953 PM CDT Fri Jul 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN KNOX AND SOUTHERN
LEWIS COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 200 AM CDT for west central
Illinois...and northeastern Missouri.
LAT...LON 3976 9126 3973 9202 3993 9208 3990 9135
TIME...MOT...LOC 0252Z 328DEG 19KT 3988 9160
$$
ILC001-MOC127-205-100315-
/O.CON.KLSX.SV.W.0118.000000T0000Z-210710T0315Z/
Adams IL-Marion MO-Shelby MO-
953 PM CDT Fri Jul 9 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT
FOR SOUTHWESTERN ADAMS...CENTRAL MARION AND NORTHEASTERN SHELBY
COUNTIES...
At 952 PM CDT, a severe thunderstorm was located near Maywood, moving
southeast at 20 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Palmyra, Warren, Shelbyville, Fall Creek, Emden, Philadelphia, Bethel
and Marblehead.
This includes Interstate 172 near exit 2.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 200 AM CDT for west central
Illinois...and northeastern Missouri.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3976 9126 3973 9202 3993 9208 3990 9135
TIME...MOT...LOC 0252Z 328DEG 19KT 3988 9160
HAIL...1.25IN
WIND...60MPH
$$
Elmore287
WWUS53 KLSX 100313
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
1013 PM CDT Fri Jul 9 2021
ILC001-MOC127-205-100322-
/O.EXP.KLSX.SV.W.0118.000000T0000Z-210710T0315Z/
Adams IL-Marion MO-Shelby MO-
1013 PM CDT Fri Jul 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN ADAMS...CENTRAL
MARION AND NORTHEASTERN SHELBY COUNTIES WILL EXPIRE AT 1015 PM CDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
A Tornado Watch remains in effect until 200 AM CDT for west central
Illinois...and northeastern Missouri.
Remember, a Severe Thunderstorm Warning still remains in effect for
portions of Marion and Shelby county until 1030 PM.
LAT...LON 3976 9126 3973 9202 3993 9208 3990 9135
TIME...MOT...LOC 0312Z 328DEG 19KT 3980 9154
$$
ElmoreThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 8:07 PM CDT | Severe Thunderstorm Warning | LSX | Adams, Brown | 38 min |
| Jul 9, 8:43 PM CDT | Severe Thunderstorm Warning | LSX | Brown | 47 min |
| Jul 9, 9:17 PM CDT | Severe Thunderstorm Warning | LSX | Brown, Pike | 43 min |
| Jul 9, 10:03 PM CDT | Areal Flood Advisory | LSX | Adams, Brown, Pike | 3 hr |
| Jul 9, 11:24 PM CDT | Areal Flood Advisory | LSX | Pike | 3 hr |
| Jul 9, 11:28 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Jersey | 47 min |
| Jul 9, 11:57 PM CDT | Areal Flood Advisory | LSX | Calhoun, Greene, Pike | 3 hr |
| Jul 9, 11:59 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Jersey, Madison | 61 min |
| Jul 10, 12:26 AM CDT | Areal Flood Advisory | LSX | Calhoun, Jersey | 3 hr |
| Jul 10, 12:42 AM CDT | Severe Thunderstorm Warning | LSX | Bond, Clinton, Madison, Monroe, Saint Clair, Washington | 63 min |
| Jul 10, 1:08 AM CDT | Severe Thunderstorm Warning | LSX | Monroe, Randolph | 52 min |
| Jul 10, 1:36 AM CDT | Severe Thunderstorm Warning | LSX | Bond, Clinton, Marion, Saint Clair, Washington | 54 min |
| Jul 10, 1:50 AM CDT | Severe Thunderstorm Warning | LSX | Randolph | 40 min |
| Jul 10, 2:49 AM CDT | River Flood Warning | LSX | Calhoun, Greene, Jersey | 10 days |
| Jul 10, 3:05 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Clinton, Madison, Saint Clair | 21 min |
| Jul 10, 3:11 PM CDT | Areal Flood Advisory | LSX | Macoupin, Madison | 3 hr |
| Jul 10, 4:31 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Marion, Randolph, Washington | 59 min |
| Jul 9, 8:21 PM CDT | Severe Thunderstorm Warning | LSX | Lewis, Marion | 39 min |
| Jul 9, 8:55 PM CDT | Severe Thunderstorm Warning | LSX | Marion, Ralls | 50 min |
| Jul 9, 8:58 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Saint Louis | 62 min |
| Jul 9, 9:00 PM CDT | Severe Thunderstorm Warning | LSX | Knox | 45 min |
| Jul 9, 9:08 PM CDT | Areal Flood Advisory | LSX | Lewis, Marion | 32 min |
| Jul 9, 9:14 PM CDT | Severe Thunderstorm Warning | LSX | Saint Louis, City of Saint Louis | 48 min |
| Jul 9, 9:36 PM CDT | Severe Thunderstorm Warning | LSX | Marion, Monroe, Pike, Ralls, Shelby | 54 min |
| Jul 9, 9:40 PM CDT | Flash Flood Warning | LSX | Lewis, Marion | 3 hr |
| Jul 9, 10:10 PM CDT | Severe Thunderstorm Warning | LSX | Audrain, Lincoln, Monroe, Pike, Ralls | 50 min |
| Jul 9, 10:32 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Shelby | 23 min |
| Jul 9, 10:45 PM CDT | Severe Thunderstorm Warning | LSX | Audrain, Callaway, Lincoln, Montgomery, Pike, Warren | 45 min |
| Jul 9, 11:08 PM CDT | Severe Thunderstorm Warning | LSX | Callaway, Franklin, Gasconade, Montgomery, Osage, Warren | 67 min |
| Jul 9, 11:10 PM CDT | River Flood Warning | LSX | Lewis | 5 days |
| Jul 9, 11:10 PM CDT | River Flood Warning | LSX | Lewis | 32 hr |
| Jul 9, 11:10 PM CDT | River Flood Warning | LSX | Marion | 4 days |
| Jul 10, 12:41 AM CDT | Areal Flood Advisory | LSX | Saint Louis, City of Saint Louis | 3 hr |
| Jul 10, 1:49 AM CDT | River Flood Warning | LSX | Marion | 18 hr |
| Jul 10, 2:29 AM CDT | Severe Thunderstorm Warning | LSX | Iron, Madison | 21 min |
| Jul 10, 6:14 AM CDT | River Flood Warning | LSX | Monroe | 4 days |
| Jul 10, 8:30 AM CDT | River Flood Warning | LSX | Lincoln | 3 days |
| Jul 10, 2:15 PM CDT | Areal Flood Advisory | LSX | Saint Charles, Saint Louis | 3 hr |
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.