Alert archive / Missouri / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 44, NWS Kansas City, MO

June 20, 20214 counties in Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Jun 20, 2021, 6:52 PM CDT for 4 counties in Missouri. It was in force for 23 min. 2 reports 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 20, 2021, 6:52 PM CDT (23:52 UTC)
Expired: Jun 20, 2021, 7:15 PM CDT
In force: 23 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Harrison County, MO, Mercer County, MO, Putnam County, MO, Sullivan County, MO

The radar

The Des Moines radar (KDMX), 155 km from the middle of the area, began a volume at 23:54 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 20, 6:58 PM CDT	HAIL 1.75	Mercer, MO
Jun 20, 7:17 PM CDT	HAIL 1	Princeton, MO	ALSO ESTIMATED 60MPH WINDS.

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 20, 4:01 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 11.9 hours before the alert went out and 239 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: 577 J/kg
Mixed-layer CIN: -261 J/kg
Mixed-layer LCL: 1356 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 166 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

720 
WUUS53 KEAX 202352
SVREAX
MOC081-129-171-211-210015-
/O.NEW.KEAX.SV.W.0044.210620T2352Z-210621T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Kansas City/Pleasant Hill MO
652 PM CDT Sun Jun 20 2021

The National Weather Service in Pleasant Hill has issued a

* Severe Thunderstorm Warning for...
  Western Putnam County in north central Missouri...
  Mercer County in north central Missouri...
  Northwestern Sullivan County in north central Missouri...
  Northeastern Harrison County in north central Missouri...

* Until 715 PM CDT.

* At 652 PM CDT, a severe thunderstorm was located near Lamoni, or 13
  miles south of Leon, moving east at 30 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...
  Cainsville around 705 PM CDT.

Other locations in the path of this severe thunderstorm include
Mercer.

This includes Interstate 35 in Missouri between mile markers 99 and
113.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4023 9320 4026 9337 4027 9337 4026 9340
      4038 9412 4057 9400 4058 9311
TIME...MOT...LOC 2352Z 280DEG 24KT 4056 9384 

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

Blair

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 7:42 PM CDT	Severe Thunderstorm Warning	EAX	Randolph	33 min
Jun 19, 8:13 PM CDT	Special Weather Statement	EAX	Randolph	47 min
Jun 19, 8:28 PM CDT	Severe Thunderstorm Warning	EAX	Randolph	32 min
Jun 19, 8:57 PM CDT	Special Weather Statement	EAX	Randolph	48 min
Jun 19, 9:09 PM CDT	Flash Flood Warning	EAX	Howard, Randolph	5 hr
Jun 19, 9:25 PM CDT	Severe Thunderstorm Warning	EAX	Randolph	35 min
Jun 19, 9:28 PM CDT	Special Weather Statement	EAX	Macon	47 min
Jun 19, 9:33 PM CDT	Areal Flood Advisory	EAX	Adair, Macon	6 hr
Jun 19, 9:40 PM CDT	Severe Thunderstorm Warning	EAX	Chariton, Howard, Randolph	35 min
Jun 19, 9:58 PM CDT	Severe Thunderstorm Warning	EAX	Adair, Macon	32 min
Jun 19, 10:33 PM CDT	Severe Thunderstorm Warning	EAX	Chariton	27 min
Jun 19, 10:56 PM CDT	Special Weather Statement	EAX	Chariton	49 min
Jun 19, 11:08 PM CDT	Severe Thunderstorm Warning	EAX	Carroll, Chariton, Livingston	37 min
Jun 19, 11:32 PM CDT	Areal Flood Advisory	EAX	Carroll, Chariton, Howard, Livingston	6 hr
Jun 19, 11:44 PM CDT	Special Weather Statement	EAX	Chariton	46 min
Jun 20, 12:01 AM CDT	Flash Flood Warning	EAX	Chariton, Howard	7 hr
Jun 20, 2:30 AM CDT	Areal Flood Warning	EAX	Randolph	3 hr
Jun 20, 3:34 AM CDT	Special Weather Statement	EAX	Gentry, Nodaway	41 min
Jun 20, 8:34 AM CDT	Special Weather Statement	EAX	Sullivan	41 min
Jun 20, 9:10 AM CDT	Special Weather Statement	EAX	Adair	50 min
Jun 20, 11:26 AM CDT	Special Weather Statement	EAX	Randolph	34 min
Jun 20, 6:07 PM CDT	Special Weather Statement	EAX	Andrew	38 min
Jun 20, 6:24 PM CDT	Severe Thunderstorm Warning	EAX	Andrew, DeKalb	36 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.