Alert archive / Missouri / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 73, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jun 19, 2021, 6:00 PM CDT for Jefferson County, Saint Louis County, Missouri; Monroe County, Illinois. It was in force for 45 min. 3 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
- Jun 19, 2021, 6:00 PM CDT (23:00 UTC)
- Expired
- Jun 19, 2021, 6:45 PM CDT
- In force
- 45 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Monroe County, IL, Jefferson County, MO, Saint Louis County, MO
The radar
The St Louis radar (KLSX), 42 km from the middle of the area, began a volume at 23:01 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 |
|---|---|---|---|
| Jun 19, 6:05 PM CDT | HAIL 0.25 | High Ridge, MO | PEA SIZE HAIL FALLING HEAVILY. |
| Jun 19, 6:10 PM CDT | TSTM WND DMG | High Ridge, MO | A COUPLE OF TREES DOWN OVER ROADWAYS IN HIGH RIDGE. |
| Jun 19, 6:14 PM CDT | TSTM WND DMG | 1 Ese Byrnes Mill, MO | A COUPLE OF TREES DOWN IN BYRNES MILL. |
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 |
|---|---|---|---|
| Jun 19, 2:43 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 11.0 hours before the alert went out and 240 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
- 1960 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 142 m²/s²
- 0-3 km storm-relative helicity
- 203 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
265
WUUS53 KLSX 192300
SVRLSX
ILC133-MOC099-189-192345-
/O.NEW.KLSX.SV.W.0073.210619T2300Z-210619T2345Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
600 PM CDT Sat Jun 19 2021
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Northwestern Monroe County in southwestern Illinois...
Northeastern Jefferson County in east central Missouri...
Southwestern St. Louis County in east central Missouri...
* Until 645 PM CDT.
* At 558 PM CDT, a severe thunderstorm was located over Murphy,
moving southeast at 25 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Local observations and trained weather spotter reported
widespread wind damage with this storm, including downed
trees and power lines.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* This severe thunderstorm will be near...
Arnold around 615 PM CDT.
Other locations in the path of this severe thunderstorm include
Antonia, Imperial, Barnhart, Pevely, Fountain, Horine, Herculaneum
and Valmeyer.
This includes the following highways...
Interstate 44 in Missouri between exits 264 and 277.
Interstate 55 in Missouri between exits 180 and 191.
This also includes Route 66 State Park, Mastodon Historic Site, Sandy
Creek Covered Bridge Historic Site, and Gov. Dunklin's Grave Historic
Site.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This storm is producing widespread wind damage across the St. Louis
metro area. SEEK SHELTER NOW inside a sturdy structure and stay away
from windows!
&&
LAT...LON 3819 9057 3852 9065 3860 9032 3857 9030
3855 9027 3853 9027 3853 9026 3852 9026
3842 9014 3841 9014 3838 9011
TIME...MOT...LOC 2258Z 322DEG 18KT 3847 9050
HAIL...1.00IN
WIND...60MPH
$$
KD2 follow-up statements
304
WWUS53 KLSX 192320
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
620 PM CDT Sat Jun 19 2021
MOC189-192329-
/O.CAN.KLSX.SV.W.0073.000000T0000Z-210619T2345Z/
St. Louis MO-
620 PM CDT Sat Jun 19 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN ST. LOUIS COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
southwestern Illinois...and east central Missouri.
LAT...LON 3848 9060 3850 9044 3848 9042 3846 9042
3845 9040 3840 9034 3839 9034 3839 9033
3832 9026 3821 9052
TIME...MOT...LOC 2319Z 322DEG 18KT 3839 9042
$$
ILC133-MOC099-192345-
/O.CON.KLSX.SV.W.0073.000000T0000Z-210619T2345Z/
Monroe IL-Jefferson MO-
620 PM CDT Sat Jun 19 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR WEST CENTRAL MONROE AND NORTHEASTERN JEFFERSON COUNTIES...
At 619 PM CDT, a severe thunderstorm was located over Imperial,
moving southeast at 25 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE....Local observations and trained weather spotter reported
widespread wind damage with this storm, including downed
trees and power lines.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Barnhart, Imperial, Pevely, Horine, Herculaneum and Valmeyer.
This also includes Mastodon Historic Site, Sandy Creek Covered Bridge
Historic Site, and Gov. Dunklin's Grave Historic Site.
This includes Interstate 55 in Missouri between exits 180 and 190.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This storm is producing widespread wind damage across the St. Louis
metro area! SEEK SHELTER NOW inside a sturdy structure and stay away
from windows.
&&
LAT...LON 3848 9060 3850 9044 3848 9042 3846 9042
3845 9040 3840 9034 3839 9034 3839 9033
3832 9026 3821 9052
TIME...MOT...LOC 2319Z 322DEG 18KT 3839 9042
HAIL...1.00IN
WIND...60MPH
$$
KD128
WWUS53 KLSX 192345
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
645 PM CDT Sat Jun 19 2021
ILC133-MOC099-192355-
/O.EXP.KLSX.SV.W.0073.000000T0000Z-210619T2345Z/
Monroe IL-Jefferson MO-
645 PM CDT Sat Jun 19 2021
...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL MONROE AND
NORTHEASTERN JEFFERSON COUNTIES HAS EXPIRED...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been allowed to expire.
A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
southwestern Illinois...and east central Missouri.
LAT...LON 3848 9060 3850 9044 3848 9042 3846 9042
3845 9040 3840 9034 3839 9034 3839 9033
3832 9026 3821 9052
TIME...MOT...LOC 2345Z 322DEG 18KT 3830 9033
$$
KDThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 2:15 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Pike | 31 min |
| Jun 19, 2:44 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Pike | 32 min |
| Jun 19, 2:52 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 38 min |
| Jun 19, 2:55 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln | 50 min |
| Jun 19, 3:21 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 25 min |
| Jun 19, 3:31 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Saint Charles | 44 min |
| Jun 19, 4:16 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Saint Charles, Saint Louis | 44 min |
| Jun 19, 4:35 PM CDT | Flash Flood Warning | LSX | Saint Charles | 6 hr |
| Jun 19, 4:43 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Saint Louis | 47 min |
| Jun 19, 5:09 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Saint Louis | 51 min |
| Jun 19, 5:17 PM CDT | Severe Thunderstorm Warning | LSX | Saint Louis, City of Saint Louis | 43 min |
| Jun 19, 5:25 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson, Saint Louis | 35 min |
| Jun 19, 5:31 PM CDT | Severe Thunderstorm Warning | LSX | Marion, Ralls | 59 min |
| Jun 19, 5:46 PM CDT | Severe Thunderstorm Warning | LSX | Pike, Ralls | 59 min |
| Jun 19, 5:58 PM CDT | Flash Flood Warning | LSX | Marion, Pike, Ralls | 6 hr |
| Jun 19, 6:46 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Pike | 44 min |
| Jun 19, 6:54 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Ralls | 51 min |
| Jun 19, 5:44 AM CDT | Severe Thunderstorm Warning | LSX | Marion | 18 min |
| Jun 19, 10:45 AM CDT | Severe Thunderstorm Warning | LSX | Macoupin, Montgomery | 45 min |
| Jun 19, 4:10 PM CDT | Flash Flood Warning | LSX | Calhoun | 6 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.