Alert archive / Missouri / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 159, NWS Kansas City, MO

December 15, 2021Carroll County, Jackson County, Lafayette County, Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Dec 15, 2021, 6:35 PM CST for Carroll County, Jackson County, Lafayette County, Missouri. It was in force for 40 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 15, 2021, 6:35 PM CST (00:35 UTC)
Expired: Dec 15, 2021, 7:15 PM CST
In force: 40 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Damage threat: Considerable
Hail: 0.75 in
Wind: 70.0 mph

Counties Carroll County, MO, Jackson County, MO, Lafayette County, MO

The radar

The Pleasant Hill radar (KEAX), 44 km from the middle of the area, began a volume at 00:38 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 15, 3:18 PM CST	Severe Thunderstorm Watch	SPC	5 hr
Dec 15, 6:00 PM CST	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 0.6 hours before the alert went out and 146 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2425 m above ground
0-6 km bulk shear: 99 kt
0-1 km storm-relative helicity: -149 m²/s²
0-3 km storm-relative helicity: 201 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

596 
WUUS53 KEAX 160035
SVREAX
MOC033-095-107-160115-
/O.NEW.KEAX.SV.W.0159.211216T0035Z-211216T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Kansas City/Pleasant Hill MO
635 PM CST Wed Dec 15 2021

The National Weather Service in Pleasant Hill has issued a

* Severe Thunderstorm Warning for...
  Southwestern Carroll County in north central Missouri...
  Lafayette County in west central Missouri...
  Eastern Jackson County in west central Missouri...

* Until 715 PM CST.

* At 634 PM CST, a severe thunderstorm was located over Levasy, or
  near Buckner, moving east at 65 mph.

  HAZARD...70 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  Independence, Blue Springs, Grain Valley, Oak Grove, Odessa,
  Higginsville, Lexington, Buckner, Concordia, Lake Lotawana,
  Waverly, Wellington, Corder, Alma, Sibley, Blackburn, Mayview,
  Levasy, Lake Lafayette and Emma.

This includes Interstate 70 in Missouri between mile markers 20 and
62.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for damaging winds. People outside should move 
immediately to shelter inside a strong building. Stay away from 
windows.

&&

LAT...LON 3891 9431 3921 9424 3921 9419 3918 9419
      3913 9406 3915 9403 3919 9403 3921 9398
      3918 9396 3915 9399 3914 9396 3918 9393
      3921 9385 3921 9376 3926 9376 3932 9348
      3894 9350 3894 9383 3891 9385
TIME...MOT...LOC 0034Z 249DEG 57KT 3915 9413 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

CDB

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 15, 6:00 PM CST	Severe Thunderstorm Warning Considerable damage threat	EAX	Cass, Jackson	45 min
Dec 15, 6:11 PM CST	Severe Thunderstorm Warning Considerable damage threat	EAX	Bates, Cass	64 min
Dec 15, 6:15 PM CST	Severe Thunderstorm Warning Considerable damage threat	EAX	Caldwell, Carroll, Clay, Clinton, Daviess, Livingston and 1 more	60 min
Dec 15, 6:24 PM CST	Severe Thunderstorm Warning Considerable damage threat	EAX	Daviess, Grundy, Harrison, Mercer, Putnam, Sullivan	66 min
Dec 15, 6:43 PM CST	Severe Thunderstorm Warning Considerable damage threat	EAX	Cass, Jackson, Johnson	47 min
Dec 15, 7:03 PM CST	Severe Thunderstorm Warning Considerable damage threat	EAX	Adair, Carroll, Chariton, Grundy, Linn, Livingston and 7 more	87 min
Dec 15, 7:08 PM CST	Severe Thunderstorm Warning Considerable damage threat	EAX	Bates, Carroll, Cass, Chariton, Cooper, Henry and 7 more	82 min
Dec 15, 8:25 PM CST	Severe Thunderstorm Warning	EAX	Cooper, Howard, Randolph	35 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.