Alert archive / Missouri / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 195, NWS St. Louis, MO

December 10, 2021Reynolds County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Dec 10, 2021, 10:26 PM CST for Reynolds County, Missouri. It was in force for 20 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: Dec 10, 2021, 10:26 PM CST (04:26 UTC)
Expired: Dec 10, 2021, 10:46 PM CST
In force: 20 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

County Reynolds County, MO

The radar

The St Louis radar (KLSX), 172 km from the middle of the area, began a volume at 04:27 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
Dec 10, 3:07 PM CST	Tornado Watch	SPC	11 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 4.4 hours before the alert went out and 259 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 637 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 1113 m above ground
0-6 km bulk shear: 80 kt
0-1 km storm-relative helicity: 344 m²/s²
0-3 km storm-relative helicity: 300 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 8.4

Open this sounding in Storm Lab

The text

As transmitted.

117 
WUUS53 KLSX 110426
SVRLSX
MOC179-110500-
/O.NEW.KLSX.SV.W.0195.211211T0426Z-211211T0500Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
1026 PM CST Fri Dec 10 2021

The National Weather Service in St Louis has issued a

* Severe Thunderstorm Warning for...
  Southeastern Reynolds County in southeastern Missouri...

* Until 1100 PM CST.

* At 1026 PM CST, a severe thunderstorm was located near Ellington,
  moving east at 50 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.

* This severe thunderstorm will remain over mainly rural areas of
  southeastern Reynolds County.

This also includes Clearwater Lake Recreational Area.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM CST for southeastern
Missouri.

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.

For your protection move to an interior room on the lowest floor of a
building.

A Tornado Watch remains in effect until 1100 PM CST for southeastern
Missouri.

&&

LAT...LON 3705 9096 3710 9096 3710 9102 3714 9102
      3714 9103 3717 9103 3716 9107 3718 9107
      3718 9109 3724 9111 3737 9075 3727 9075
      3727 9074 3720 9073 3717 9074 3717 9075
      3714 9076 3714 9078 3705 9078
TIME...MOT...LOC 0426Z 257DEG 45KT 3718 9096 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Britt

1 follow-up statement

518 
WWUS53 KLSX 110446
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
1046 PM CST Fri Dec 10 2021

MOC179-110456-
/O.CAN.KLSX.SV.W.0195.000000T0000Z-211211T0500Z/
Reynolds MO-
1046 PM CST Fri Dec 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN REYNOLDS COUNTY
IS CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.

A Tornado Watch remains in effect until 1100 PM CST for southeastern
Missouri.

LAT...LON 3705 9096 3710 9096 3710 9102 3714 9102
      3714 9103 3717 9103 3716 9107 3718 9107
      3718 9109 3724 9111 3737 9075 3727 9075
      3727 9074 3720 9073 3717 9074 3717 9075
      3714 9076 3714 9078 3705 9078
TIME...MOT...LOC 0445Z 257DEG 45KT 3724 9065 

$$

Britt

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 10, 6:13 PM CST	Severe Thunderstorm Warning	LSX	Boone, Callaway, Cole, Moniteau	47 min
Dec 10, 6:18 PM CST	Severe Thunderstorm Warning	LSX	Cole, Osage	42 min
Dec 10, 6:27 PM CST	Tornado Warning	LSX	Audrain, Callaway	34 min
Dec 10, 6:30 PM CST	Tornado Warning	LSX	Callaway, Cole, Gasconade, Montgomery, Osage	45 min
Dec 10, 6:42 PM CST	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade, Osage	48 min
Dec 10, 6:42 PM CST	Tornado Warning	LSX	Pike	48 min
Dec 10, 6:49 PM CST	Tornado Warning	LSX	Franklin, Gasconade, Osage, Warren	41 min
Dec 10, 6:50 PM CST	Tornado Warning	LSX	Audrain, Callaway, Montgomery, Pike, Ralls	40 min
Dec 10, 7:00 PM CST	Tornado Warning	LSX	Gasconade, Lincoln, Montgomery, Pike, Warren	45 min
Dec 10, 7:02 PM CST	Tornado Warning	LSX	Crawford, Franklin, Gasconade	43 min
Dec 10, 7:11 PM CST	Tornado Warning	LSX	Lincoln, Montgomery, Pike	49 min
Dec 10, 7:16 PM CST	Tornado Warning	LSX	Franklin, Lincoln, Saint Charles, Warren	44 min
Dec 10, 7:30 PM CST	Tornado Warning	LSX	Lincoln	45 min
Dec 10, 7:35 PM CST	Tornado Warning Tornado observed	LSX	Franklin, Jefferson, Lincoln, Saint Charles, Saint Louis, Warren	40 min
Dec 10, 7:49 PM CST	Severe Thunderstorm Warning	LSX	Crawford, Washington	26 min
Dec 10, 8:06 PM CST	Tornado Warning Tornado observed	LSX	Saint Charles, Saint Louis, City of Saint Louis	39 min
Dec 10, 8:10 PM CST	Severe Thunderstorm Warning	LSX	Franklin	35 min
Dec 10, 8:29 PM CST	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Louis, City of Saint Louis	30 min
Dec 10, 8:34 PM CST	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade, Osage	41 min
Dec 10, 8:47 PM CST	Tornado Warning	LSX	Franklin, Gasconade, Warren	43 min
Dec 10, 9:07 PM CST	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Lincoln, Saint Charles, Saint Louis, Warren and 1 more	38 min
Dec 10, 9:39 PM CST	Tornado Warning	LSX	Saint Charles, Saint Louis	51 min
Dec 10, 10:00 PM CST	Severe Thunderstorm Warning	LSX	Iron, Reynolds	45 min
Dec 10, 10:05 PM CST	Severe Thunderstorm Warning	LSX	City of Saint Louis	25 min
Dec 10, 10:14 PM CST	Tornado Warning	LSX	Iron, Madison, Reynolds	46 min
Dec 10, 10:19 PM CST	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois	41 min
Dec 10, 10:55 PM CST	Severe Thunderstorm Warning	LSX	Madison	18 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2021 Every 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.