Alert archive / Missouri / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 91, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jun 21, 2021, 12:34 AM CDT for 4 counties in Missouri. It was in force for 26 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
- Jun 21, 2021, 12:34 AM CDT (05:34 UTC)
- Expired
- Jun 21, 2021, 1:00 AM CDT
- In force
- 26 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Boone County, MO, Callaway County, MO, Cole County, MO, Moniteau County, MO
The radar
The St Louis radar (KLSX), 126 km from the middle of the area, began a volume at 05:34 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 |
|---|---|---|---|
| Jun 20, 8:10 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 5.6 hours before the alert went out and 244 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
- 1346 J/kg
- Mixed-layer CIN
- -132 J/kg
- Mixed-layer LCL
- 1683 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 81 m²/s²
- 0-3 km storm-relative helicity
- 264 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 5.8
The text
As transmitted.
564
WUUS53 KLSX 210534
SVRLSX
MOC019-027-051-135-210600-
/O.NEW.KLSX.SV.W.0091.210621T0534Z-210621T0600Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
1234 AM CDT Mon Jun 21 2021
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Central Cole County in central Missouri...
Southeastern Boone County in central Missouri...
Central Callaway County in central Missouri...
Southeastern Moniteau County in central Missouri...
* Until 100 AM CDT.
* At 1234 AM CDT, severe thunderstorms were located along a line
extending from 7 miles northeast of Columbia Regional Airport to
near St. Martins to near Centertown, moving east at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Severe thunderstorms will be near...
Jefferson City around 1240 AM CDT.
Fulton, Holts Summit, Lake Mykee Town and Lake Mykee around 1250
AM CDT.
Other locations in the path of these severe thunderstorms include
Wardsville.
This also includes Clarks Hill/Norton Historic Site and Jefferson
Landing Historic Site.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3866 9240 3892 9225 3891 9170 3867 9185
3859 9195 3858 9199 3854 9203 3847 9222
3854 9259
TIME...MOT...LOC 0534Z 280DEG 35KT 3890 9213 3864 9229 3857 9241
TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
$$
192 follow-up statements
926
WWUS53 KLSX 210547
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
1247 AM CDT Mon Jun 21 2021
MOC019-135-210557-
/O.CAN.KLSX.SV.W.0091.000000T0000Z-210621T0600Z/
Boone MO-Moniteau MO-
1247 AM CDT Mon Jun 21 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BOONE AND
SOUTHEASTERN MONITEAU COUNTIES IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 100 AM CDT for
central Missouri.
LAT...LON 3864 9222 3891 9205 3891 9170 3867 9185
3859 9195 3858 9199 3854 9203 3847 9222
3855 9239
TIME...MOT...LOC 0547Z 270DEG 35KT 3888 9200 3862 9216 3855 9228
$$
MOC027-051-210600-
/O.CON.KLSX.SV.W.0091.000000T0000Z-210621T0600Z/
Cole MO-Callaway MO-
1247 AM CDT Mon Jun 21 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 AM CDT
FOR CENTRAL COLE AND SOUTHERN CALLAWAY COUNTIES...
At 1247 AM CDT, severe thunderstorms were located along a line
extending from near Fulton to near Holts Summit to near St. Martins,
moving east at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
These severe storms will be near...
Fulton around 1250 AM CDT.
This also includes Clarks Hill/Norton Historic Site and Jefferson
Landing Historic Site.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3864 9222 3891 9205 3891 9170 3867 9185
3859 9195 3858 9199 3854 9203 3847 9222
3855 9239
TIME...MOT...LOC 0547Z 270DEG 35KT 3888 9200 3862 9216 3855 9228
TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
$$
19575
WWUS53 KLSX 210557
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
1257 AM CDT Mon Jun 21 2021
MOC027-051-210606-
/O.EXP.KLSX.SV.W.0091.000000T0000Z-210621T0600Z/
Cole MO-Callaway MO-
1257 AM CDT Mon Jun 21 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL COLE AND SOUTHERN
CALLAWAY COUNTIES WILL EXPIRE AT 100 AM CDT...
The storms which prompted the warning have weakened below severe
limits. Therefore, the warning will be allowed to expire. However
gusty winds are still possible with these thunderstorms.
A Severe Thunderstorm Watch remains in effect until 100 AM CDT for
central Missouri.
LAT...LON 3864 9222 3891 9205 3891 9170 3867 9185
3859 9195 3858 9199 3854 9203 3847 9222
3855 9239
TIME...MOT...LOC 0556Z 270DEG 35KT 3887 9192 3861 9208 3854 9220
$$
19The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 8:41 PM CDT | Severe Thunderstorm Warning | LSX | Knox, Lewis, Shelby | 49 min |
| Jun 20, 9:07 PM CDT | Tornado Warning | LSX | Marion, Shelby | 38 min |
| Jun 20, 9:17 PM CDT | Severe Thunderstorm Warning | LSX | Knox, Lewis, Marion, Monroe, Ralls, Shelby | 43 min |
| Jun 20, 9:42 PM CDT | Severe Thunderstorm Warning | LSX | Audrain, Boone, Monroe | 48 min |
| Jun 20, 9:59 PM CDT | Severe Thunderstorm Warning | LSX | Marion, Monroe, Pike, Ralls | 46 min |
| Jun 20, 10:10 PM CDT | Severe Thunderstorm Warning | LSX | Audrain, Boone, Monroe, Montgomery, Pike, Ralls | 50 min |
| Jun 20, 10:22 PM CDT | Severe Thunderstorm Warning | LSX | Audrain, Boone, Callaway | 38 min |
| Jun 20, 10:27 PM CDT | Areal Flood Advisory | LSX | Audrain, Boone, Monroe | 3 hr |
| Jun 20, 10:42 PM CDT | Severe Thunderstorm Warning | LSX | Boone, Callaway, Cole, Moniteau | 48 min |
| Jun 20, 10:55 PM CDT | Severe Thunderstorm Warning | LSX | Audrain, Boone, Callaway, Montgomery | 35 min |
| Jun 20, 11:29 PM CDT | Severe Thunderstorm Warning | LSX | Boone, Callaway, Cole, Franklin, Gasconade, Lincoln and 3 more | 31 min |
| Jun 20, 11:41 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Saint Charles | 19 min |
| Jun 20, 11:59 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Gasconade, Montgomery, Osage, Warren | 31 min |
Nearby
Severe Thunderstorm Warnings in Missouri, 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.