Alert archive / Missouri / Tornado Warnings in 2021

Tornado Warning 40, NWS St. Louis, MO

December 10, 2021Pike County, Missouri; Pike County, Illinois

NWS St. Louis, MO issued this tornado warning at Dec 10, 2021, 6:42 PM CST for Pike County, Missouri; Pike County, Illinois. It was in force for 48 min. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Dec 10, 2021, 6:42 PM CST (00:42 UTC)
Expired: Dec 10, 2021, 7:30 PM CST
In force: 48 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Pike County, IL, Pike County, MO

The radar

The St Louis radar (KLSX), 99 km from the middle of the area, began a volume at 00:46 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.

What was reported inside it

Time	Report	Where	Remark
Dec 10, 6:42 PM CST	TSTM WND DMG	1 W Ashburn, MO	PIKE COUNTY DISPATCH REPORTED 4 TREES BLOCKING MISSOURI HIGHWAY 79 NEAR THE INTERSECTION WITH ROUTE TT. TIME ESTIMATED VIA RADAR.
Dec 10, 6:57 PM CST	TSTM WND DMG	El Dara, IL	PIKE COUNTY DISPATCH REPORTED SEVERAL TREES DOWN ALONG COUNTY HIGHWAY 4 NEAR EL DARA. TIME ESTIMATED USING RADAR.
Dec 10, 7:12 PM CST	TSTM WND DMG	Griggsville, IL	TRANSFORMER BLOWN AND POWER LINES DOWN IN THE CITY OF GRIGGSVILLE.
Dec 10, 7:15 PM CST	NON-TSTM WND GST 52	2 Ne Pittsfield, IL	AWOS STATION KPPQ PITTSFIELD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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, 5:17 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 0.7 hours before the alert went out and 218 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: 119 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 662 m above ground
0-6 km bulk shear: 73 kt
0-1 km storm-relative helicity: 341 m²/s²
0-3 km storm-relative helicity: 357 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

295 
WFUS53 KLSX 110042
TORLSX
ILC149-MOC163-110130-
/O.NEW.KLSX.TO.W.0040.211211T0042Z-211211T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
642 PM CST Fri Dec 10 2021

The National Weather Service in St Louis has issued a

* Tornado Warning for...
  Central Pike County in west central Illinois...
  North central Pike County in northeastern Missouri...

* Until 730 PM CST.
    
* At 642 PM CST, a severe thunderstorm capable of producing a tornado
  was located near Frankford, moving northeast at 55 mph.

  HAZARD...Tornado and quarter size hail.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Louisiana and Pike around 650 PM CST.
  Atlas around 655 PM CST.

Other locations in the path of this tornadic thunderstorm include
Pittsfield and Griggsville.

This includes Interstate 72 between exits 31 and 35.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

This is a dangerous situation. Immediately follow evacuation orders
from local authorities. If there are no evacuation orders, take cover
now in the closest substantial shelter. Move to the basement or an
interior room on the lowest floor of a sturdy building and avoid
windows.

&&

LAT...LON 3939 9126 3953 9130 3982 9076 3959 9059
TIME...MOT...LOC 0042Z 239DEG 49KT 3948 9121 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

Glass

3 follow-up statements

162 
WWUS53 KLSX 110055 RRA
SVSLSX

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

MOC163-110105-
/O.CAN.KLSX.TO.W.0040.000000T0000Z-211211T0130Z/
Pike MO-
655 PM CST Fri Dec 10 2021

...THE TORNADO WARNING FOR NORTH CENTRAL PIKE COUNTY IN NORTHEASTERN
MISSOURI IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 1100 PM CST for west central
Illinois...and northeastern Missouri.

LAT...LON 3982 9076 3959 9059 3949 9106 3951 9108
      3954 9110 3954 9112 3959 9117 3960 9116
TIME...MOT...LOC 0055Z 239DEG 49KT 3957 9101 

$$

ILC149-110130-
/O.CON.KLSX.TO.W.0040.000000T0000Z-211211T0130Z/
Pike IL-
655 PM CST Fri Dec 10 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CST FOR CENTRAL
PIKE COUNTY IN WEST CENTRAL ILLINOIS...
    
At 655 PM CST, a severe thunderstorm capable of producing a tornado
was located near Atlas, moving northeast at 55 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
  Pittsfield and Griggsville.

This includes Interstate 72 between exits 31 and 35.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 3982 9076 3959 9059 3949 9106 3951 9108
      3954 9110 3954 9112 3959 9117 3960 9116
TIME...MOT...LOC 0055Z 239DEG 49KT 3957 9101 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

Glass

406 
WWUS53 KLSX 110105
SVSLSX

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

ILC149-110130-
/O.CON.KLSX.TO.W.0040.000000T0000Z-211211T0130Z/
Pike IL-
705 PM CST Fri Dec 10 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CST FOR
NORTHEASTERN PIKE COUNTY IN WEST CENTRAL ILLINOIS...
    
At 705 PM CST, a severe thunderstorm capable of producing a tornado
was located near Pittsfield, moving northeast at 55 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
Pittsfield, Griggsville, Perry, Baylis, New Salem, Detroit and New
Hartford.

This includes Interstate 72 between exits 31 and 35.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 3982 9076 3959 9059 3955 9093 3968 9099
TIME...MOT...LOC 0105Z 239DEG 49KT 3965 9085 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

Glass

506 
WWUS53 KLSX 110128
SVSLSX

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

ILC149-110137-
/O.EXP.KLSX.TO.W.0040.000000T0000Z-211211T0130Z/
Pike IL-
728 PM CST Fri Dec 10 2021

...THE TORNADO WARNING FOR NORTHEASTERN PIKE COUNTY IN WEST CENTRAL
ILLINOIS WILL EXPIRE AT 730 PM CST...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

A Tornado Watch remains in effect until 1100 PM CST for west central
Illinois.

LAT...LON 3982 9076 3959 9059 3955 9093 3968 9099
TIME...MOT...LOC 0127Z 239DEG 49KT 3981 9051 

$$

Glass

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, 6:49 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, 10:26 PM CST	Severe Thunderstorm Warning	LSX	Reynolds	20 min
Dec 10, 10:55 PM CST	Severe Thunderstorm Warning	LSX	Madison	18 min
Dec 10, 7:16 PM CST	Tornado Warning	LSX	Pike	14 min
Dec 10, 7:36 PM CST	Tornado Warning	LSX	Pike	21 min
Dec 10, 8:33 PM CST	Tornado Warning Tornado observedConsiderable damage threat	LSX	Bond, Madison	42 min
Dec 10, 8:37 PM CST	Tornado Warning	LSX	Macoupin, Madison	17 min
Dec 10, 8:44 PM CST	Tornado Warning Tornado observed	LSX	Fayette, Macoupin, Madison, Montgomery	46 min
Dec 10, 8:56 PM CST	Tornado Warning	LSX	Bond, Fayette, Montgomery	34 min
Dec 10, 10:18 PM CST	Severe Thunderstorm Warning	LSX	Bond, Fayette, Macoupin, Madison, Montgomery	57 min
Dec 10, 10:26 PM CST	Tornado Warning	LSX	Bond, Fayette, Montgomery	49 min
Dec 10, 10:51 PM CST	Severe Thunderstorm Warning	LSX	Clinton, Saint Clair, Washington	39 min
Dec 10, 11:02 PM CST	Tornado Warning	LSX	Fayette	29 min
Dec 10, 11:10 PM CST	Tornado Warning	LSX	Clinton, Marion, Washington	50 min

Nearby

Tornado Warnings in Missouri, 2021 Tornado Warnings in Illinois, 2021 Every tornado warning in 2021 Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.