Alert archive / Missouri / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 172, NWS St. Louis, MO

October 24, 2021Pike County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Oct 24, 2021, 7:00 PM CDT for Pike County, Missouri. It was in force for 34 min. 1 report 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: Oct 24, 2021, 7:00 PM CDT (00:00 UTC)
Expired: Oct 24, 2021, 7:34 PM CDT
In force: 34 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

County Pike County, MO

The radar

The St Louis radar (KLSX), 87 km from the middle of the area, began a volume at 00:03 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
Oct 24, 7:31 PM CDT	TSTM WND DMG	4 Sse Louisiana, MO	SPOTTER REPORTS A LARGE TREE DOWN IN THEIR YARD.

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
Oct 24, 2:06 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 0.0 hours before the alert went out and 225 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: 3 J/kg
Mixed-layer CIN: -286 J/kg
Mixed-layer LCL: 585 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 371 m²/s²
0-3 km storm-relative helicity: 467 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.1

Open this sounding in Storm Lab

The text

As transmitted.

054 
WUUS53 KLSX 250000
SVRLSX
MOC163-250045-
/O.NEW.KLSX.SV.W.0172.211025T0000Z-211025T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
700 PM CDT Sun Oct 24 2021

The National Weather Service in St Louis has issued a

* Severe Thunderstorm Warning for...
  Pike County in northeastern Missouri...

* Until 745 PM CDT.

* At 700 PM CDT, a severe thunderstorm was located near Farber,
  moving northeast at 45 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Curryville and Spencerburg around 715 PM CDT.
  Bowling Green around 720 PM CDT.

Other locations in the path of this severe thunderstorm include
Tarrants and Louisiana.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1000 PM CDT for southwestern
and west central Illinois...and northeastern 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 southwestern
and west central Illinois...and northeastern Missouri.

&&

LAT...LON 3954 9110 3949 9106 3947 9106 3944 9103
      3942 9099 3941 9095 3938 9092 3938 9091
      3936 9089 3935 9086 3915 9141 3940 9145
      3954 9113
TIME...MOT...LOC 0000Z 239DEG 40KT 3926 9151 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

CVKING

2 follow-up statements

445 
WWUS53 KLSX 250025
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
725 PM CDT Sun Oct 24 2021

MOC163-250045-
/O.CON.KLSX.SV.W.0172.000000T0000Z-211025T0045Z/
Pike MO-
725 PM CDT Sun Oct 24 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR CENTRAL PIKE COUNTY IN NORTHEASTERN MISSOURI...

At 725 PM CDT, a severe thunderstorm was located near Tarrants,
moving northeast at 45 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
  Louisiana.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1000 PM CDT for southwestern
and west central Illinois...and northeastern Missouri.

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

&&

LAT...LON 3954 9110 3949 9106 3947 9106 3944 9103
      3942 9099 3941 9095 3938 9092 3927 9119
      3940 9129
TIME...MOT...LOC 0025Z 239DEG 40KT 3941 9119 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

CVKING

940 
WWUS53 KLSX 250034
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
734 PM CDT Sun Oct 24 2021

MOC163-250044-
/O.CAN.KLSX.SV.W.0172.000000T0000Z-211025T0045Z/
Pike MO-
734 PM CDT Sun Oct 24 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL PIKE COUNTY IN
NORTHEASTERN MISSOURI 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.

A Tornado Watch remains in effect until 1000 PM CDT for southwestern
and west central Illinois...and northeastern Missouri.

LAT...LON 3954 9110 3949 9106 3947 9106 3944 9103
      3942 9099 3941 9095 3938 9092 3927 9119
      3940 9129
TIME...MOT...LOC 0032Z 239DEG 40KT 3946 9108 

$$

CVKING

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 24, 7:03 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Warren	42 min
Oct 24, 7:06 PM CDT	Tornado Warning	LSX	Reynolds	39 min
Oct 24, 7:07 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Franklin, Gasconade, Montgomery, Osage, Warren	38 min
Oct 24, 7:09 PM CDT	Tornado Warning	LSX	Crawford, Iron, Washington	31 min
Oct 24, 7:37 PM CDT	Severe Thunderstorm Warning	LSX	Reynolds	38 min
Oct 24, 7:39 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois, Washington	51 min
Oct 24, 7:48 PM CDT	Tornado Warning	LSX	Iron, Madison, Reynolds, Saint Francois	27 min
Oct 24, 8:03 PM CDT	Tornado Warning	LSX	Sainte Genevieve, Saint Francois	42 min
Oct 24, 8:09 PM CDT	Tornado Warning	LSX	Sainte Genevieve, Saint Francois	40 min
Oct 24, 8:10 PM CDT	Tornado Warning	LSX	Iron, Madison, Reynolds	50 min
Oct 24, 8:23 PM CDT	Tornado Warning	LSX	Iron, Madison, Reynolds	52 min
Oct 24, 8:34 PM CDT	Tornado Warning Tornado observedConsiderable damage threat	LSX	Sainte Genevieve	41 min
Oct 24, 8:48 PM CDT	Tornado Warning Tornado observedConsiderable damage threat	LSX	Madison, Saint Francois	27 min
Oct 24, 9:08 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Louis	54 min
Oct 24, 9:11 PM CDT	Tornado Warning	LSX	Iron, Madison	49 min
Oct 24, 9:12 PM CDT	Flash Flood Warning	LSX	Iron, Madison	4 hr
Oct 24, 9:37 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Reynolds	36 min
Oct 24, 10:07 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Reynolds	38 min
Oct 24, 10:12 PM CDT	Flash Flood Warning	LSX	Madison	4 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.