Alert archive / Missouri / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 28, NWS Kansas City, MO

June 11, 20214 counties in Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Jun 11, 2021, 3:57 PM CDT for 4 counties in Missouri. It was in force for 14 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: Jun 11, 2021, 3:57 PM CDT (20:57 UTC)
Expired: Jun 11, 2021, 4:11 PM CDT
In force: 14 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 70.0 mph

Counties Clay County, MO, Clinton County, MO, Jackson County, MO, Ray County, MO

The radar

The Pleasant Hill radar (KEAX), 57 km from the middle of the area, began a volume at 21:02 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
Jun 11, 4:00 PM CDT	TSTM WND GST 62	Mosby, MO

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
Jun 11, 12:32 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 9.0 hours before the alert went out and 126 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: 2135 J/kg
Mixed-layer CIN: -160 J/kg
Mixed-layer LCL: 1019 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 72 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -1.2

Open this sounding in Storm Lab

The text

As transmitted.

158 
WUUS53 KEAX 112057
SVREAX
MOC047-049-095-177-112130-
/O.NEW.KEAX.SV.W.0028.210611T2057Z-210611T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Kansas City/Pleasant Hill MO
357 PM CDT Fri Jun 11 2021

The National Weather Service in Pleasant Hill has issued a

* Severe Thunderstorm Warning for...
  Northeastern Clay County in west central Missouri...
  Southeastern Clinton County in northwestern Missouri...
  Western Ray County in west central Missouri...
  North central Jackson County in west central Missouri...

* Until 430 PM CDT.

* At 357 PM CDT, a severe thunderstorm was located near Leawood,
  moving southeast at 35 mph.

  HAZARD...70 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect considerable 
           tree damage. Wind damage is also likely to mobile homes, 
           roofs, and outbuildings.

* This severe thunderstorm will remain over mainly rural areas of
  northeastern Clay, southeastern Clinton, western Ray and north
  central Jackson Counties, including the following locations...
  Knoxville, Mosby, Prathersville, Homestead, Rayville and Elmira.

This includes Interstate 35 in Missouri between mile markers 23 and
33.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3945 9440 3953 9404 3933 9393 3919 9415
      3919 9428 3921 9437 3925 9439
TIME...MOT...LOC 2057Z 319DEG 32KT 3895 9456 

HAIL...1.00IN
WIND...70MPH
 
$$

PP

1 follow-up statement

740 
WWUS53 KEAX 112111
SVSEAX

Severe Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
411 PM CDT Fri Jun 11 2021

MOC047-049-095-177-112119-
/O.CAN.KEAX.SV.W.0028.000000T0000Z-210611T2130Z/
Clay MO-Clinton MO-Ray MO-Jackson MO-
411 PM CDT Fri Jun 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CLAY...
SOUTHEASTERN CLINTON...WESTERN RAY AND NORTH CENTRAL JACKSON COUNTIES
IS CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.  However gusty winds are
still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 700 PM CDT for
north central, northwestern and west central Missouri.

Remember, a Severe Thunderstorm Warning still remains in effect for
southern Ray County.

LAT...LON 3945 9440 3953 9404 3933 9393 3919 9415
      3919 9428 3921 9437 3925 9439
TIME...MOT...LOC 2108Z 319DEG 32KT 3886 9446 

$$

PP

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 12:04 PM CDT	Special Weather Statement	EAX	Atchison	41 min
Jun 11, 12:10 PM CDT	Severe Thunderstorm Warning	EAX	Atchison, Holt	21 min
Jun 11, 1:16 PM CDT	Severe Thunderstorm Warning	EAX	Holt	29 min
Jun 11, 1:41 PM CDT	Severe Thunderstorm Warning	EAX	Andrew, Buchanan, Holt	34 min
Jun 11, 2:12 PM CDT	Severe Thunderstorm Warning	EAX	Andrew, Buchanan, DeKalb, Holt, Platte	63 min
Jun 11, 2:44 PM CDT	Severe Thunderstorm Warning	EAX	Andrew, Buchanan, Clay, Clinton, DeKalb, Platte	46 min
Jun 11, 2:49 PM CDT	Severe Thunderstorm Warning	EAX	Carroll, Lafayette, Ray	41 min
Jun 11, 2:52 PM CDT	Severe Thunderstorm Warning	EAX	Clay, Clinton, Jackson, Platte	68 min
Jun 11, 3:26 PM CDT	Severe Thunderstorm Warning	EAX	Caldwell, Clay, Clinton, Jackson, Ray	34 min
Jun 11, 3:28 PM CDT	Special Weather Statement	EAX	Lafayette	47 min
Jun 11, 3:37 PM CDT	Severe Thunderstorm Warning	EAX	Cass, Clay, Jackson, Lafayette, Ray	38 min
Jun 11, 3:59 PM CDT	Severe Thunderstorm Warning	EAX	Cass, Clay, Jackson	31 min
Jun 11, 4:02 PM CDT	Areal Flood Advisory	EAX	Platte	4 hr
Jun 11, 4:07 PM CDT	Special Weather Statement	EAX	Pettis	38 min
Jun 11, 4:14 PM CDT	Severe Thunderstorm Warning	EAX	Cass, Clay, Jackson, Johnson, Lafayette, Ray	46 min
Jun 11, 4:25 PM CDT	Severe Thunderstorm Warning	EAX	Johnson, Lafayette, Pettis, Saline	35 min
Jun 11, 4:42 PM CDT	Severe Thunderstorm Warning	EAX	Bates, Cass, Henry, Johnson, Pettis	33 min
Jun 11, 5:08 PM CDT	Severe Thunderstorm Warning	EAX	Henry, Johnson, Lafayette, Pettis, Saline	37 min
Jun 11, 5:58 PM CDT	River Flood Warning	EAX	Jackson	81 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.