Alert archive / Missouri / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 31, NWS Kansas City, MO

June 11, 20214 counties in Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Jun 11, 2021, 4:25 PM CDT for 4 counties in Missouri. It was in force for 35 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: Jun 11, 2021, 4:25 PM CDT (21:25 UTC)
Expired: Jun 11, 2021, 5:00 PM CDT
In force: 35 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Johnson County, MO, Lafayette County, MO, Pettis County, MO, Saline County, MO

The radar

The Pleasant Hill radar (KEAX), 73 km from the middle of the area, began a volume at 21:29 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
Jun 11, 12:32 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 11, 3:54 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 9.4 hours before the alert went out and 191 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.

710 
WUUS53 KEAX 112125
SVREAX
MOC101-107-159-195-112200-
/O.NEW.KEAX.SV.W.0031.210611T2125Z-210611T2200Z/

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

The National Weather Service in Pleasant Hill has issued a

* Severe Thunderstorm Warning for...
  Northwestern Pettis County in central Missouri...
  Southwestern Saline County in central Missouri...
  Southeastern Lafayette County in west central Missouri...
  Northeastern Johnson County in west central Missouri...

* Until 500 PM CDT.

* At 425 PM CDT, a severe thunderstorm was located over Sweet
  Springs, moving southeast at 15 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.

* This severe thunderstorm will be near...
  Houstonia around 445 PM CDT.

This includes Interstate 70 in Missouri between mile markers 59 and
71.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3892 9365 3904 9351 3893 9320 3880 9321
      3876 9337
TIME...MOT...LOC 2125Z 305DEG 13KT 3893 9344 

HAIL...1.00IN
WIND...60MPH
 
$$

Leighton

1 follow-up statement

354 
WWUS53 KEAX 112158 RRA
SVSEAX

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

MOC101-107-159-195-112208-
/O.EXP.KEAX.SV.W.0031.000000T0000Z-210611T2200Z/
Pettis MO-Saline MO-Lafayette MO-Johnson MO-
458 PM CDT Fri Jun 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN PETTIS...
SOUTHWESTERN SALINE...SOUTHEASTERN LAFAYETTE AND NORTHEASTERN JOHNSON
COUNTIES WILL EXPIRE AT 500 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 700 PM CDT for
west central Missouri. A Severe Thunderstorm Watch also remains in
effect until 1000 PM CDT for central Missouri.

LAT...LON 3892 9365 3904 9351 3893 9320 3880 9321
      3876 9337
TIME...MOT...LOC 2158Z 305DEG 13KT 3886 9332 

$$

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, 3:57 PM CDT	Severe Thunderstorm Warning	EAX	Clay, Clinton, Jackson, Ray	14 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, 4:42 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.