Alert archive / Missouri / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 138, NWS Kansas City, MO

September 20, 2021Carroll County, Lafayette County, Ray County, Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Sep 20, 2021, 6:47 PM CDT for Carroll County, Lafayette County, Ray County, Missouri. It was in force for 43 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: Sep 20, 2021, 6:47 PM CDT (23:47 UTC)
Expired: Sep 20, 2021, 7:30 PM CDT
In force: 43 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Carroll County, MO, Lafayette County, MO, Ray County, MO

The radar

The Pleasant Hill radar (KEAX), 80 km from the middle of the area, began a volume at 23:48 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
Sep 20, 6:51 PM CDT	TSTM WND DMG	1 Nne Richmond, MO	DELAYED REPORT FROM MPING: 1-INCH TREE LIMBS BROKEN; SHINGLES BLOWN OFF.

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
Sep 20, 3:25 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 11.8 hours before the alert went out and 179 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: 583 J/kg
Mixed-layer CIN: -288 J/kg
Mixed-layer LCL: 1142 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 185 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

186 
WUUS53 KEAX 202347
SVREAX
MOC033-107-177-210030-
/O.NEW.KEAX.SV.W.0138.210920T2347Z-210921T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Kansas City/Pleasant Hill MO
647 PM CDT Mon Sep 20 2021

The National Weather Service in Pleasant Hill has issued a

* Severe Thunderstorm Warning for...
  Eastern Ray County in west central Missouri...
  Western Carroll County in north central Missouri...
  Northeastern Lafayette County in west central Missouri...

* Until 730 PM CDT.

* At 646 PM CDT, a severe thunderstorm was located near Richmond,
  moving east at 40 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...
  Richmond, Carrollton, Waverly, Norborne, Hardin, Henrietta, Bogard,
  Tina, Dover and Stet.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3928 9345 3929 9348 3918 9349 3921 9400
      3950 9397 3954 9343
TIME...MOT...LOC 2346Z 269DEG 37KT 3935 9400 

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

$$

Klaus

1 follow-up statement

495 
WWUS53 KEAX 210026
SVSEAX

Severe Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
726 PM CDT Mon Sep 20 2021

MOC033-107-177-210036-
/O.EXP.KEAX.SV.W.0138.000000T0000Z-210921T0030Z/
Ray MO-Carroll MO-Lafayette MO-
726 PM CDT Mon Sep 20 2021

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN RAY...WESTERN CARROLL
AND NORTHEASTERN LAFAYETTE COUNTIES WILL EXPIRE AT 730 PM CDT...
                
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 will be allowed to expire.  However gusty
winds and heavy rain are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
central, north central and west central Missouri.

LAT...LON 3928 9345 3929 9348 3918 9349 3921 9400
      3950 9397 3954 9343
TIME...MOT...LOC 0026Z 269DEG 37KT 3936 9348 

$$

Klaus

The office that day

Everything else NWS Kansas City, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 20, 4:00 PM CDT	Special Weather Statement	EAX	Buchanan	30 min
Sep 20, 4:12 PM CDT	Severe Thunderstorm Warning	EAX	Harrison, Worth	33 min
Sep 20, 4:36 PM CDT	Special Weather Statement	EAX	DeKalb	24 min
Sep 20, 4:57 PM CDT	Severe Thunderstorm Warning	EAX	Daviess, DeKalb, Gentry, Harrison	33 min
Sep 20, 5:13 PM CDT	Severe Thunderstorm Warning	EAX	Clay, Clinton, Platte	47 min
Sep 20, 5:29 PM CDT	Severe Thunderstorm Warning Considerable damage threat	EAX	Jackson	46 min
Sep 20, 5:33 PM CDT	Severe Thunderstorm Warning	EAX	Clay, Clinton, Platte	42 min
Sep 20, 5:49 PM CDT	Special Weather Statement	EAX	Daviess	26 min
Sep 20, 6:00 PM CDT	Severe Thunderstorm Warning	EAX	Clay, Jackson	45 min
Sep 20, 6:13 PM CDT	Severe Thunderstorm Warning	EAX	Bates	47 min
Sep 20, 6:23 PM CDT	Severe Thunderstorm Warning	EAX	Clay, Jackson, Ray	52 min
Sep 20, 6:34 PM CDT	Special Weather Statement	EAX	Cass	26 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.