Alert archive / Kansas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 122, NWS Kansas City, MO

August 12, 2021Linn County, Miami County, Kansas; Bates County, Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Aug 12, 2021, 11:57 PM CDT for Linn County, Miami County, Kansas; Bates County, Missouri. It was in force for 33 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: Aug 12, 2021, 11:57 PM CDT (04:57 UTC)
Expired: Aug 13, 2021, 12:30 AM CDT
In force: 33 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Linn County, KS, Miami County, KS, Bates County, MO

The radar

The Pleasant Hill radar (KEAX), 61 km from the middle of the area, began a volume at 05:00 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

Topeka, KS (KTOP), launched 00:00Z, 5.0 hours before the alert went out and 118 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: 4214 J/kg
Mixed-layer CIN: -86 J/kg
Mixed-layer LCL: 1420 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 110 m²/s²
0-3 km storm-relative helicity: 179 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.4

Open this sounding in Storm Lab

The text

As transmitted.

845 
WUUS53 KEAX 130457
SVREAX
KSC107-121-MOC013-130530-
/O.NEW.KEAX.SV.W.0122.210813T0457Z-210813T0530Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Kansas City/Pleasant Hill MO
1157 PM CDT Thu Aug 12 2021

The National Weather Service in Pleasant Hill has issued a

* Severe Thunderstorm Warning for...
  Southeastern Miami County in east central Kansas...
  Northeastern Linn County in east central Kansas...
  Northwestern Bates County in west central Missouri...

* Until 1230 AM CDT.

* At 1156 PM CDT, a severe thunderstorm was located near Archie, or
  near Adrian, moving southeast at 20 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Butler, Adrian, Pleasanton, La Cygne, Drexel, Linn Valley, Fontana,
  Amsterdam, Amoret, Merwin, Passaic, Worland and New Lancaster.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3824 9487 3847 9489 3848 9439 3845 9424
      3825 9421 3816 9465
TIME...MOT...LOC 0456Z 296DEG 15KT 3844 9445 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Blair

1 follow-up statement

104 
WWUS53 KEAX 130526
SVSEAX

Severe Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
1226 AM CDT Fri Aug 13 2021

KSC107-121-MOC013-130535-
/O.EXP.KEAX.SV.W.0122.000000T0000Z-210813T0530Z/
Miami KS-Linn KS-Bates MO-
1226 AM CDT Fri Aug 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MIAMI...
NORTHEASTERN LINN AND NORTHWESTERN BATES COUNTIES WILL EXPIRE AT 1230
AM 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 are still possible with this thunderstorm.

LAT...LON 3824 9487 3847 9489 3848 9439 3845 9424
      3825 9421 3816 9465
TIME...MOT...LOC 0525Z 296DEG 15KT 3839 9432 

$$

Blair

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 7:32 PM CDT	Special Weather Statement	EAX	Wyandotte	28 min
Aug 12, 8:03 PM CDT	Special Weather Statement	EAX	Johnson, Wyandotte	27 min
Aug 12, 8:16 PM CDT	Severe Thunderstorm Warning	EAX	Johnson, Wyandotte	29 min
Aug 12, 8:45 PM CDT	Special Weather Statement	EAX	Johnson	30 min
Aug 12, 9:06 PM CDT	Severe Thunderstorm Warning	EAX	Johnson	24 min
Aug 12, 9:29 PM CDT	Severe Thunderstorm Warning	EAX	Johnson, Miami	31 min
Aug 12, 9:36 PM CDT	Severe Thunderstorm Warning	EAX	Johnson, Leavenworth, Wyandotte	24 min
Aug 12, 9:52 PM CDT	Severe Thunderstorm Warning	EAX	Johnson	23 min
Aug 12, 9:55 PM CDT	Severe Thunderstorm Warning	EAX	Johnson, Leavenworth, Wyandotte	20 min
Aug 12, 10:03 PM CDT	Flash Flood Warning	EAX	Johnson	4 hr
Aug 12, 10:16 PM CDT	Special Weather Statement	EAX	Johnson	29 min
Aug 12, 11:39 PM CDT	River Flood Warning	EAX	Johnson	4 hr
Aug 12, 11:39 PM CDT	River Flood Warning	EAX	Johnson	8 hr
Aug 12, 11:39 PM CDT	River Flood Warning	EAX	Johnson	18 hr
Aug 13, 12:42 AM CDT	Special Weather Statement	EAX	Atchison	33 min
Aug 13, 1:57 AM CDT	Flash Flood Warning	EAX	Johnson, Leavenworth, Wyandotte	6 hr
Aug 13, 5:49 AM CDT	Areal Flood Warning	EAX	Linn, Miami	12 hr
Aug 13, 7:39 AM CDT	Areal Flood Warning	EAX	Johnson, Leavenworth, Wyandotte	10 hr
Aug 12, 8:01 PM CDT	Special Weather Statement	EAX	Jackson	29 min
Aug 12, 8:53 PM CDT	Severe Thunderstorm Warning	EAX	Jackson, Johnson, Lafayette, Ray	15 min
Aug 12, 11:52 PM CDT	Special Weather Statement	EAX	Bates	23 min
Aug 13, 9:59 AM CDT	River Flood Warning	EAX	Bates, Cass, Henry	12 hr

Nearby

Severe Thunderstorm Warnings in Kansas, 2021 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.