Alert archive / Kansas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 46, NWS Topeka, KS

June 11, 2021Jackson County, Jefferson County, Kansas

NWS Topeka, KS issued this severe thunderstorm warning at Jun 11, 2021, 1:28 PM CDT for Jackson County, Jefferson County, Kansas. It was in force for 47 min. 14 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 11, 2021, 1:28 PM CDT (18:28 UTC)
Expired: Jun 11, 2021, 2:15 PM CDT
In force: 47 min
Issued by: NWS Topeka, KS
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Jackson County, KS, Jefferson County, KS

The radar

The Topeka radar (KTWX), 66 km from the middle of the area, began a volume at 18:31 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 11, 1:33 PM CDT	TSTM WND DMG	4 S Holton, KS	CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 4 S HOLTON. TREE KNOCKED OVER A POWER LINE NEAR 198TH AND R4.
Jun 11, 1:44 PM CDT	TSTM WND GST 62	Mayetta, KS
Jun 11, 1:48 PM CDT	TSTM WND DMG	Mayetta, KS	REPORT FROM MPING: 1-INCH TREE LIMBS BROKEN; SHINGLES BLOWN OFF.
Jun 11, 1:50 PM CDT	TSTM WND GST 62	1 Nw Hoyt, KS
Jun 11, 1:54 PM CDT	TSTM WND DMG	1 Nw Hoyt, KS	REPORT FROM MPING: 1-INCH TREE LIMBS BROKEN; SHINGLES BLOWN OFF.
Jun 11, 1:58 PM CDT	TSTM WND DMG	1 Nw Valley Falls, KS	REPORT FROM MPING: 3-INCH TREE LIMBS BROKEN; POWER POLES BROKEN.
Jun 11, 2:00 PM CDT	TSTM WND GST 75	1 W Valley Falls, KS
Jun 11, 2:01 PM CDT	TSTM WND GST 80	Ozawkie, KS	134TH AND KING.
Jun 11, 2:13 PM CDT	TSTM WND GST 77	1 N Meriden, KS
Jun 11, 2:13 PM CDT	HAIL 1	4 Nw Ozawkie, KS
Jun 11, 2:15 PM CDT	TSTM WND GST 75	2 S Meriden, KS
Jun 11, 2:21 PM CDT	TSTM WND GST 58	Winchester, KS
Jun 11, 2:23 PM CDT	TSTM WND DMG	4 S Holton, KS	TREE KNOCKED OVER A POWER LINE NEAR 198TH AND R4.
Jun 11, 2:25 PM CDT	TSTM WND GST 73	Winchester, KS	CORRECTS PREVIOUS TSTM WND GST REPORT FROM WINCHESTER.

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 11, 8:30 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 11, 12:32 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 6.5 hours before the alert went out and 32 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.

599 
WUUS53 KTOP 111828
SVRTOP
KSC085-087-111915-
/O.NEW.KTOP.SV.W.0046.210611T1828Z-210611T1915Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Topeka KS
128 PM CDT Fri Jun 11 2021

The National Weather Service in Topeka has issued a

* Severe Thunderstorm Warning for...
  Jefferson County in northeastern Kansas...
  Southern Jackson County in northeastern Kansas...

* Until 215 PM CDT.

* At 127 PM CDT, severe thunderstorms were located along a line
  extending from near Holton to 6 miles northeast of Louisville,
  moving southeast at 35 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Severe thunderstorms will be near...
  Holton around 135 PM CDT.
  Mayetta around 140 PM CDT.
  Denison around 145 PM CDT.

Other locations in the path of these severe thunderstorms include
Valley Falls, Ozawkie, Perry Lake, Oskaloosa, McLouth and Winchester.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3915 9518 3909 9539 3910 9550 3914 9559
      3922 9559 3922 9575 3933 9603 3940 9603
      3955 9570 3948 9557 3942 9557 3942 9518
TIME...MOT...LOC 1827Z 308DEG 32KT 3949 9575 3932 9625 

HAIL...<.75IN
WIND...60MPH
 
$$

Omitt

1 follow-up statement

091 
WWUS53 KTOP 111858
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
158 PM CDT Fri Jun 11 2021

KSC085-087-111915-
/O.CON.KTOP.SV.W.0046.000000T0000Z-210611T1915Z/
Jefferson-Jackson-
158 PM CDT Fri Jun 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM CDT
FOR JEFFERSON AND SOUTHEASTERN JACKSON COUNTIES...

At 158 PM CDT, severe thunderstorms were located along a line
extending from near Nortonville to 4 miles west of Hoyt, moving
southeast at 35 mph.

HAZARD...70 mph wind gusts.

SOURCE...Emergency management.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

Locations impacted include...
  Nortonville, Winchester, Meriden and Perry Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3920 9518 3910 9548 3910 9550 3914 9559
      3922 9559 3922 9575 3926 9584 3942 9537
      3942 9518
TIME...MOT...LOC 1858Z 300DEG 30KT 3941 9529 3924 9579 

HAIL...<.75IN
WIND...70MPH
 
$$

Omitt

The office that day

Everything else NWS Topeka, KS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 11, 12:10 PM CDT	Special Weather Statement	TOP	Nemaha	35 min
Jun 11, 12:19 PM CDT	Severe Thunderstorm Warning	TOP	Brown, Marshall, Nemaha	41 min
Jun 11, 12:56 PM CDT	Severe Thunderstorm Warning	TOP	Brown, Jackson, Nemaha	49 min
Jun 11, 2:03 PM CDT	Severe Thunderstorm Warning	TOP	Douglas, Jefferson, Shawnee	42 min
Jun 11, 2:10 PM CDT	Severe Thunderstorm Warning	TOP	Jefferson	35 min
Jun 11, 2:21 PM CDT	Special Weather Statement	TOP	Shawnee, Wabaunsee	24 min
Jun 11, 2:25 PM CDT	Severe Thunderstorm Warning	TOP	Jackson	19 min
Jun 11, 2:40 PM CDT	Severe Thunderstorm Warning	TOP	Douglas, Jefferson, Shawnee	50 min
Jun 11, 3:08 PM CDT	Areal Flood Advisory	TOP	Douglas	3 hr
Jun 11, 3:20 PM CDT	Severe Thunderstorm Warning	TOP	Jackson, Jefferson	25 min
Jun 11, 3:35 PM CDT	Severe Thunderstorm Warning	TOP	Jackson	25 min
Jun 11, 4:05 PM CDT	Severe Thunderstorm Warning	TOP	Coffey, Douglas, Franklin, Osage	40 min
Jun 11, 4:45 PM CDT	Severe Thunderstorm Warning	TOP	Anderson, Franklin	30 min
Jun 11, 5:15 PM CDT	Severe Thunderstorm Warning	TOP	Anderson, Franklin	30 min
Jun 11, 5:32 PM CDT	Severe Thunderstorm Warning	TOP	Anderson, Coffey	28 min
Jun 11, 6:01 PM CDT	Severe Thunderstorm Warning	TOP	Anderson, Coffey	29 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.