Alert archive / Missouri / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 79, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jun 19, 2021, 9:33 PM CDT for Callaway County, Missouri. It was in force for 42 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 19, 2021, 9:33 PM CDT (02:33 UTC)
- Expired
- Jun 19, 2021, 10:15 PM CDT
- In force
- 42 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.88 in
- Wind
- 60.0 mph
County Callaway County, MO
The radar
The St Louis radar (KLSX), 108 km from the middle of the area, began a volume at 02:36 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 nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 2.6 hours before the alert went out and 284 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
- 1685 J/kg
- Mixed-layer CIN
- -99 J/kg
- Mixed-layer LCL
- 1459 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 116 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.0
The text
As transmitted.
409
WUUS53 KLSX 200233
SVRLSX
MOC027-200315-
/O.NEW.KLSX.SV.W.0079.210620T0233Z-210620T0315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
933 PM CDT Sat Jun 19 2021
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Northeastern Callaway County in central Missouri...
* Until 1015 PM CDT.
* At 932 PM CDT, a severe thunderstorm was located near Auxvasse,
moving southeast at 25 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* This severe thunderstorm will be near...
Williamsburg around 950 PM CDT.
This includes Interstate 70 in Missouri between exits 144 and 161.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. This storm may cause serious injury and significant
property damage.
&&
LAT...LON 3906 9201 3906 9193 3904 9163 3871 9165
3884 9205
TIME...MOT...LOC 0232Z 297DEG 23KT 3894 9187
TORNADO...POSSIBLE
HAIL...0.88IN
WIND...60MPH
$$
GKS2 follow-up statements
501 WWUS53 KLSX 200249 SVSLSX Severe Weather Statement National Weather Service St Louis MO 949 PM CDT Sat Jun 19 2021 MOC027-200315- /O.CON.KLSX.SV.W.0079.000000T0000Z-210620T0315Z/ Callaway MO- 949 PM CDT Sat Jun 19 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT FOR NORTHEASTERN CALLAWAY COUNTY... At 948 PM CDT, a severe thunderstorm was located near Williamsburg, moving southeast at 25 mph. HAZARD...60 mph wind gusts and nickel size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Williamsburg. This includes Interstate 70 in Missouri between exits 155 and 161. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain alert for a possible tornado! Tornadoes can develop quickly from severe thunderstorms. If you spot a tornado go at once into the basement or small central room in a sturdy structure. Intense thunderstorm lines can produce brief tornadoes and widespread significant wind damage. Although a tornado is not immediately likely, it is best to move to an interior room on the lowest floor of a building. This storm may cause serious injury and significant property damage. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3901 9189 3899 9164 3871 9165 3883 9200 TIME...MOT...LOC 0248Z 311DEG 18KT 3888 9182 TORNADO...POSSIBLE HAIL...0.88IN WIND...60MPH $$ GKS
149
WWUS53 KLSX 200312
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
1012 PM CDT Sat Jun 19 2021
MOC027-200321-
/O.EXP.KLSX.SV.W.0079.000000T0000Z-210620T0315Z/
Callaway MO-
1012 PM CDT Sat Jun 19 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CALLAWAY COUNTY
WILL EXPIRE AT 1015 PM CDT...
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 will be allowed to expire. However small
hail, gusty winds and heavy rain are still possible with this
thunderstorm.
LAT...LON 3901 9189 3899 9164 3871 9165 3883 9200
TIME...MOT...LOC 0311Z 297DEG 23KT 3882 9166
$$
GKSThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 7:12 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Pike | 48 min |
| Jun 19, 7:31 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Saint Charles | 44 min |
| Jun 19, 8:00 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Saint Charles, Saint Louis | 21 min |
| Jun 19, 8:42 PM CDT | Flash Flood Warning | LSX | Audrain, Boone, Monroe | 6 hr |
| Jun 19, 11:49 PM CDT | Areal Flood Warning | LSX | Marion, Pike, Ralls | 11 hr |
| Jun 20, 1:39 AM CDT | Flash Flood Warning | LSX | Boone | 5 hr |
| Jun 20, 2:13 AM CDT | Areal Flood Warning | LSX | Audrain, Boone, Monroe | 3 hr |
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.