Alert archive / Missouri / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 170, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Oct 24, 2021, 6:36 PM CDT for Audrain County, Montgomery County, Ralls County, Missouri. It was in force for 39 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
- Oct 24, 2021, 6:36 PM CDT (23:36 UTC)
- Expired
- Oct 24, 2021, 7:15 PM CDT
- In force
- 39 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.88 in
- Wind
- 60.0 mph
Counties Audrain County, MO, Montgomery County, MO, Ralls County, MO
The radar
The St Louis radar (KLSX), 101 km from the middle of the area, began a volume at 23:40 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 |
|---|---|---|---|
| Oct 24, 2:06 PM CDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 11.6 hours before the alert went out and 286 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
- 972 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 120 m²/s²
- 0-3 km storm-relative helicity
- 162 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
584
WUUS53 KLSX 242336
SVRLSX
MOC007-139-173-250015-
/O.NEW.KLSX.SV.W.0170.211024T2336Z-211025T0015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
636 PM CDT Sun Oct 24 2021
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Southern Ralls County in northeastern Missouri...
Eastern Audrain County in central Missouri...
Northwestern Montgomery County in east central Missouri...
* Until 715 PM CDT.
* At 636 PM CDT, a severe thunderstorm was located near Mexico,
moving northeast at 40 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...
Martinsburg around 655 PM CDT.
Other locations in the path of this severe thunderstorm include
Laddonia, Farber and Vandalia.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1000 PM CDT for central,
northeastern and east central Missouri.
For your protection move to an interior room on the lowest floor of a
building.
A Tornado Watch remains in effect until 1000 PM CDT for central,
northeastern and east central Missouri.
&&
LAT...LON 3940 9145 3915 9141 3906 9163 3906 9198
3915 9202
TIME...MOT...LOC 2336Z 242DEG 34KT 3911 9188
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
CVKING2 follow-up statements
444
WWUS53 KLSX 242347
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
647 PM CDT Sun Oct 24 2021
MOC007-139-173-250015-
/O.CON.KLSX.SV.W.0170.000000T0000Z-211025T0015Z/
Ralls MO-Audrain MO-Montgomery MO-
647 PM CDT Sun Oct 24 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR SOUTHERN RALLS...EASTERN AUDRAIN AND NORTHWESTERN MONTGOMERY
COUNTIES...
At 647 PM CDT, a severe thunderstorm was located near Mexico, moving
northeast at 40 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
This severe storm will be near...
Martinsburg around 655 PM CDT.
Other locations in the path of this severe thunderstorm include
Laddonia, Farber and Vandalia.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1000 PM CDT for central,
northeastern and east central Missouri.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3940 9145 3915 9141 3908 9163 3912 9184
3924 9182
TIME...MOT...LOC 2347Z 242DEG 34KT 3916 9176
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
CVKING809 WWUS53 KLSX 242357 SVSLSX Severe Weather Statement National Weather Service St Louis MO 657 PM CDT Sun Oct 24 2021 MOC007-139-173-250015- /O.CON.KLSX.SV.W.0170.000000T0000Z-211025T0015Z/ Ralls MO-Audrain MO-Montgomery MO- 657 PM CDT Sun Oct 24 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT FOR SOUTHERN RALLS...NORTHEASTERN AUDRAIN AND NORTHWESTERN MONTGOMERY COUNTIES... At 657 PM CDT, a severe thunderstorm was located over Laddonia, moving northeast at 40 mph. HAZARD...60 mph wind gusts and nickel size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. This severe storm will be near... Farber around 705 PM CDT. Other locations in the path of this severe thunderstorm include Vandalia. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Tornado Watch remains in effect until 1000 PM CDT for central, northeastern and east central Missouri. For your protection move to an interior room on the lowest floor of a building. && LAT...LON 3940 9145 3915 9141 3908 9163 3932 9164 TIME...MOT...LOC 2357Z 242DEG 34KT 3921 9165 TORNADO...POSSIBLE HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...0.88 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ CVKING
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 24, 4:17 AM CDT | Areal Flood Advisory | LSX | Knox, Lewis, Marion, Shelby | 6 hr |
| Oct 24, 4:58 AM CDT | Flash Flood Warning | LSX | Lewis, Marion | 2 hr |
| Oct 24, 9:49 AM CDT | River Flood Warning | LSX | Marion | 23 hr |
| Oct 24, 4:49 PM CDT | Severe Thunderstorm Warning | LSX | Pike, Ralls | 41 min |
| Oct 24, 5:03 PM CDT | River Flood Warning | LSX | Marion | 38 hr |
| Oct 24, 5:17 PM CDT | Tornado Warning | LSX | Pike | 43 min |
| Oct 24, 5:27 PM CDT | Severe Thunderstorm Warning | LSX | Boone, Moniteau | 48 min |
| Oct 24, 6:37 PM CDT | Severe Thunderstorm Warning | LSX | Callaway | 38 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.