Alert archive / Missouri / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 89, NWS Kansas City, MO

July 10, 2021Johnson County, Pettis County, Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Jul 10, 2021, 7:48 PM CDT for Johnson County, Pettis County, Missouri. It was in force for 27 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: Jul 10, 2021, 7:48 PM CDT (00:48 UTC)
Expired: Jul 10, 2021, 8:15 PM CDT
In force: 27 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Johnson County, MO, Pettis County, MO

The radar

The Pleasant Hill radar (KEAX), 76 km from the middle of the area, began a volume at 00:52 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 nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 0.8 hours before the alert went out and 189 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: 2329 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 756 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 193 m²/s²
0-3 km storm-relative helicity: 261 m²/s²
Significant tornado parameter: 2.0
Supercell composite: 11.8

Open this sounding in Storm Lab

The text

As transmitted.

023 
WUUS53 KEAX 110048
SVREAX
MOC101-159-110115-
/O.NEW.KEAX.SV.W.0089.210711T0048Z-210711T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Kansas City/Pleasant Hill MO
748 PM CDT Sat Jul 10 2021

The National Weather Service in Pleasant Hill has issued a

* Severe Thunderstorm Warning for...
  Southwestern Pettis County in central Missouri...
  Southeastern Johnson County in west central Missouri...

* Until 815 PM CDT.

* At 748 PM CDT, a severe thunderstorm was located over Warrensburg,
  moving southeast at 25 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...
  Sedalia, Windsor, Knob Noster, Whiteman Air Force Base, Green
  Ridge, Whiteman Afb and Ionia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3851 9336 3851 9351 3856 9351 3856 9360
      3864 9372 3880 9360 3867 9316 3853 9329
      3850 9331
TIME...MOT...LOC 0048Z 300DEG 23KT 3875 9371 

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

PP

1 follow-up statement

997 
WWUS53 KEAX 110114
SVSEAX

Severe Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
814 PM CDT Sat Jul 10 2021

MOC101-159-110124-
/O.EXP.KEAX.SV.W.0089.000000T0000Z-210711T0115Z/
Pettis MO-Johnson MO-
814 PM CDT Sat Jul 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN PETTIS AND
SOUTHEASTERN JOHNSON COUNTIES WILL EXPIRE AT 815 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 small hail
and gusty winds are still possible with this thunderstorm.

LAT...LON 3851 9336 3851 9351 3856 9351 3856 9360
      3864 9372 3880 9360 3867 9316 3853 9329
      3850 9331
TIME...MOT...LOC 0114Z 300DEG 23KT 3868 9355 

$$

PP

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 8:03 PM CDT	Special Weather Statement	EAX	Cass	42 min
Jul 10, 8:07 PM CDT	Severe Thunderstorm Warning	EAX	Cass, Jackson	23 min
Jul 10, 8:11 PM CDT	Severe Thunderstorm Warning	EAX	Johnson, Lafayette, Pettis, Saline	22 min
Jul 10, 8:22 PM CDT	Special Weather Statement	EAX	Chariton, Linn	38 min
Jul 10, 8:57 PM CDT	Special Weather Statement	EAX	Adair, Macon, Randolph	48 min
Jul 10, 10:22 PM CDT	Special Weather Statement	EAX	Henry	53 min
Jul 11, 2:13 AM CDT	River Flood Warning	EAX	Grundy, Livingston	31 hr
Jul 11, 4:14 AM CDT	River Flood Warning	EAX	Linn, Livingston	43 hr
Jul 11, 3:13 PM CDT	River Flood Warning	EAX	Adair, Macon, Putnam, Schuyler	34 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.