Alert archive / Kansas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 33, NWS Kansas City, MO

June 11, 2021Linn County, Miami County, Kansas

NWS Kansas City, MO issued this severe thunderstorm warning at Jun 11, 2021, 4:57 PM CDT for Linn County, Miami County, Kansas. It was in force for 48 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, 4:57 PM CDT (21:57 UTC)
Expired: Jun 11, 2021, 5:45 PM CDT
In force: 48 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Linn County, KS, Miami County, KS

The radar

The Pleasant Hill radar (KEAX), 86 km from the middle of the area, began a volume at 22:01 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

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 10.0 hours before the alert went out and 95 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.

937 
WUUS53 KEAX 112157
SVREAX
KSC107-121-112245-
/O.NEW.KEAX.SV.W.0033.210611T2157Z-210611T2245Z/

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

The National Weather Service in Pleasant Hill has issued a

* Severe Thunderstorm Warning for...
  Southwestern Miami County in east central Kansas...
  Northwestern Linn County in east central Kansas...

* Until 545 PM CDT.

* At 456 PM CDT, severe thunderstorms were located along a line
  extending from near Rantoul to near Greeley to near Garnett, moving
  east at 25 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Osawatomie, Parker, Paola, Fontana, La Cygne and Blue Mound.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3811 9508 3825 9507 3826 9506 3838 9506
      3838 9507 3839 9506 3856 9507 3855 9481
      3827 9475 3809 9502
TIME...MOT...LOC 2156Z 288DEG 23KT 3856 9517 3840 9515 3830 9533 

HAIL...0.88IN
WIND...60MPH
 
$$

Leighton

4 follow-up statements

977 
WWUS53 KEAX 112206
SVSEAX

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

KSC107-121-112245-
/O.CON.KEAX.SV.W.0033.000000T0000Z-210611T2245Z/
Miami KS-Linn KS-
506 PM CDT Fri Jun 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR SOUTHWESTERN MIAMI AND NORTHWESTERN LINN COUNTIES...

At 505 PM CDT, severe thunderstorms were located along a line
extending from Rantoul to near Greeley to Garnett, moving east at 25
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.

Locations impacted include...
Paola, Osawatomie, La Cygne, Parker, Blue Mound, Fontana and Beagle. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3811 9508 3825 9507 3826 9506 3838 9506
      3838 9507 3839 9506 3856 9507 3855 9481
      3827 9475 3809 9502
TIME...MOT...LOC 2205Z 288DEG 23KT 3854 9511 3838 9509 3828 9527 

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

Leighton

324 
WWUS53 KEAX 112212
SVSEAX

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

KSC107-121-112245-
/O.CON.KEAX.SV.W.0033.000000T0000Z-210611T2245Z/
Miami KS-Linn KS-
512 PM CDT Fri Jun 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR SOUTHWESTERN MIAMI AND NORTHWESTERN LINN COUNTIES...

At 512 PM CDT, severe thunderstorms were located along a line
extending from near Rantoul to near Parker to Garnett, moving east at
25 mph.

HAZARD...Golf ball size hail and 70 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect 
         considerable tree damage. Wind damage is also likely to 
         mobile homes, roofs, and outbuildings.

Locations impacted include...
Osawatomie, La Cygne, Parker, Blue Mound, Fontana and Beagle. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3811 9508 3825 9507 3826 9506 3838 9506
      3838 9507 3839 9506 3849 9507 3848 9480
      3827 9475 3809 9502
TIME...MOT...LOC 2212Z 288DEG 23KT 3853 9506 3837 9504 3827 9522 

HAIL...1.75IN
WIND...70MPH
 
$$

Leighton

744 
WWUS53 KEAX 112230
SVSEAX

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

KSC107-121-112245-
/O.CON.KEAX.SV.W.0033.000000T0000Z-210611T2245Z/
Miami KS-Linn KS-
530 PM CDT Fri Jun 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR SOUTHWESTERN MIAMI AND NORTHWESTERN LINN COUNTIES...

At 530 PM CDT, severe thunderstorms were located along a line
extending from near Osawatomie to near Parker to near Kincaid, moving
east at 25 mph.

These are very dangerous storms.

HAZARD...80 mph wind gusts and golf ball size hail.

SOURCE...Radar indicated.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be heavily damaged. Expect 
         considerable damage to roofs, windows, and vehicles. 
         Extensive tree damage and power outages are likely.

Locations impacted include...
La Cygne, Parker, Blue Mound, Fontana and Beagle. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3811 9508 3825 9507 3826 9506 3838 9506
      3838 9507 3839 9506 3846 9507 3845 9479
      3827 9475 3809 9502
TIME...MOT...LOC 2230Z 287DEG 23KT 3849 9492 3833 9490 3816 9518 

HAIL...1.75IN
WIND...80MPH
 
$$

Leighton

548 
WWUS53 KEAX 112238
SVSEAX

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

KSC107-121-112248-
/O.EXP.KEAX.SV.W.0033.000000T0000Z-210611T2245Z/
Miami KS-Linn KS-
538 PM CDT Fri Jun 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN MIAMI AND
NORTHWESTERN LINN COUNTIES WILL EXPIRE AT 545 PM CDT...
    
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will
be allowed to expire.  However gusty winds and heavy rain are still
possible with these thunderstorms.

A Severe Thunderstorm Watch remains in effect until 700 PM CDT for
east central Kansas.

LAT...LON 3811 9508 3825 9507 3826 9506 3838 9506
      3838 9507 3839 9506 3846 9507 3845 9479
      3827 9475 3809 9502
TIME...MOT...LOC 2238Z 270DEG 23KT 3848 9487 3832 9485 3815 9513 

$$

PP

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 1:16 PM CDT	Severe Thunderstorm Warning	EAX	Atchison, Doniphan	29 min
Jun 11, 1:41 PM CDT	Severe Thunderstorm Warning	EAX	Atchison, Doniphan	34 min
Jun 11, 2:12 PM CDT	Severe Thunderstorm Warning	EAX	Atchison, Doniphan, Leavenworth	63 min
Jun 11, 2:52 PM CDT	Severe Thunderstorm Warning	EAX	Johnson, Leavenworth, Wyandotte	68 min
Jun 11, 3:59 PM CDT	Severe Thunderstorm Warning	EAX	Johnson, Miami, Wyandotte	31 min
Jun 11, 4:02 PM CDT	Areal Flood Advisory	EAX	Leavenworth, Wyandotte	4 hr
Jun 11, 5:42 PM CDT	Severe Thunderstorm Warning	EAX	Linn	33 min
Jun 11, 5:58 PM CDT	River Flood Warning	EAX	Johnson	81 min

Nearby

Severe Thunderstorm Warnings in Kansas, 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.