Alert archive / Missouri / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 44, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 16, 2021, 6:43 PM CDT for 4 counties in Missouri. It was in force for 23 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
- May 16, 2021, 6:43 PM CDT (23:43 UTC)
- Expired
- May 16, 2021, 7:06 PM CDT
- In force
- 23 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Callaway County, MO, Gasconade County, MO, Montgomery County, MO, Osage County, MO
The radar
The St Louis radar (KLSX), 79 km from the middle of the area, began a volume at 23:46 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 12:00Z, 11.7 hours before the alert went out and 282 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
- 122 J/kg
- Mixed-layer CIN
- -133 J/kg
- Mixed-layer LCL
- 1041 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 72 m²/s²
- 0-3 km storm-relative helicity
- 85 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
377
WUUS53 KLSX 162343
SVRLSX
MOC027-073-139-151-170030-
/O.NEW.KLSX.SV.W.0044.210516T2343Z-210517T0030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
643 PM CDT Sun May 16 2021
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Southwestern Montgomery County in east central Missouri...
Southeastern Callaway County in central Missouri...
Northeastern Osage County in central Missouri...
Northern Gasconade County in east central Missouri...
* Until 730 PM CDT.
* At 643 PM CDT, a severe thunderstorm was located near Chamois,
moving east at 20 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Hermann and Big Spring.
This also includes Deutschheim Historic Site.
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.
&&
LAT...LON 3880 9189 3889 9143 3879 9142 3871 9142
3871 9140 3862 9139 3861 9186
TIME...MOT...LOC 2343Z 261DEG 19KT 3872 9178
TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
$$
Carney1 follow-up statement
705
WWUS53 KLSX 170006
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
706 PM CDT Sun May 16 2021
MOC027-073-139-151-170016-
/O.CAN.KLSX.SV.W.0044.000000T0000Z-210517T0030Z/
Montgomery MO-Callaway MO-Osage MO-Gasconade MO-
706 PM CDT Sun May 16 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN MONTGOMERY...
SOUTHEASTERN CALLAWAY...NORTHEASTERN OSAGE AND NORTHERN GASCONADE
COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However small hail, gusty
winds and heavy rain are still possible with this thunderstorm.
LAT...LON 3880 9189 3889 9143 3879 9142 3871 9142
3871 9140 3862 9139 3861 9186
TIME...MOT...LOC 0004Z 261DEG 19KT 3874 9162
$$
CarneyThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 4:04 PM CDT | Severe Thunderstorm Warning | LSX | Moniteau | 41 min |
| May 16, 4:49 PM CDT | Severe Thunderstorm Warning | LSX | Boone, Callaway | 41 min |
| May 16, 6:00 PM CDT | Severe Thunderstorm Warning | LSX | Callaway, Osage | 45 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.