Alert archive / Kansas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 62, NWS Topeka, KS

June 20, 2021Franklin County, Osage County, Kansas

NWS Topeka, KS issued this severe thunderstorm warning at Jun 20, 2021, 8:07 PM CDT for Franklin County, Osage County, Kansas. It was in force for 23 min. 3 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, 8:07 PM CDT (01:07 UTC)
Expired: Jun 20, 2021, 8:30 PM CDT
In force: 23 min
Issued by: NWS Topeka, KS
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Franklin County, KS, Osage County, KS

The radar

The Topeka radar (KTWX), 87 km from the middle of the area, began a volume at 01:11 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, 8:11 PM CDT	TSTM WND GST 60	Williamsburg, KS	ALSO HAD HAIL BUT SIZE WAS UNKNOWN.
Jun 20, 8:13 PM CDT	TSTM WND DMG	4 Sw Ottawa, KS	DELAYED REPORT. VIDEO OF TREE BRANCHES UP TO 12 INCHES IN DIAMETER BROKEN -- VIDEO APPEARS TO SHOW TREES WERE HEALTHY. REPORT RECEIVED VIA TWITTER WITH TIME OF OCCURRENCE ESTIMATED WITH RADAR.
Jun 20, 8:32 PM CDT	TSTM WND GST 60	4 Sw Princeton, KS	HAD DIME SIZED HAIL TOO.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 1.1 hours before the alert went out and 57 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: 2316 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 2228 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 50 m²/s²
0-3 km storm-relative helicity: 150 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 8.8

Open this sounding in Storm Lab

The text

As transmitted.

269 
WUUS53 KTOP 210107
SVRTOP
KSC059-139-210130-
/O.NEW.KTOP.SV.W.0062.210621T0107Z-210621T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Topeka KS
807 PM CDT Sun Jun 20 2021

The National Weather Service in Topeka has issued a

* Severe Thunderstorm Warning for...
  Southwestern Franklin County in east central Kansas...
  Southeastern Osage County in east central Kansas...

* Until 830 PM CDT.

* At 807 PM CDT, a severe thunderstorm was located near Quenemo,
  moving east at 20 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...
  Ottawa, Pomona, Richmond, Williamsburg, Quenemo and Princeton. 

This includes Interstate 35 between mile markers 164 and 188.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3845 9559 3860 9557 3865 9523 3839 9523
TIME...MOT...LOC 0107Z 274DEG 17KT 3853 9551 

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

Teefey

1 follow-up statement

417 
WWUS53 KTOP 210117
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
817 PM CDT Sun Jun 20 2021

KSC139-210125-
/O.CAN.KTOP.SV.W.0062.000000T0000Z-210621T0130Z/
Osage-
817 PM CDT Sun Jun 20 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN OSAGE COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3839 9523 3844 9551 3854 9551 3859 9549
      3861 9523
TIME...MOT...LOC 0115Z 274DEG 17KT 3853 9546 

$$

KSC059-210130-
/O.CON.KTOP.SV.W.0062.000000T0000Z-210621T0130Z/
Franklin-
817 PM CDT Sun Jun 20 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT
FOR SOUTHWESTERN FRANKLIN COUNTY...

At 815 PM CDT, a severe thunderstorm was located near Williamsburg,
moving east at 20 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Ottawa, Richmond, Williamsburg and Princeton. 

This includes Interstate 35 between mile markers 168 and 186.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3839 9523 3844 9551 3854 9551 3859 9549
      3861 9523
TIME...MOT...LOC 0115Z 274DEG 17KT 3853 9546 

HAIL...1.75IN
WIND...60MPH
 
$$

Teefey

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 7:15 PM CDT	Special Weather Statement	TOP	Osage	15 min
Jun 20, 7:19 PM CDT	Severe Thunderstorm Warning	TOP	Osage	26 min
Jun 20, 7:34 PM CDT	Special Weather Statement	TOP	Coffey	26 min
Jun 20, 7:44 PM CDT	Severe Thunderstorm Warning	TOP	Franklin, Osage	31 min
Jun 20, 7:49 PM CDT	Special Weather Statement	TOP	Coffey	26 min
Jun 20, 8:02 PM CDT	Severe Thunderstorm Warning	TOP	Coffey	28 min
Jun 20, 8:26 PM CDT	Severe Thunderstorm Warning	TOP	Anderson, Franklin	34 min
Jun 20, 9:00 PM CDT	Special Weather Statement	TOP	Anderson	15 min
Jun 20, 9:11 PM CDT	Special Weather Statement	TOP	Anderson	34 min
Jun 20, 9:22 PM CDT	Severe Thunderstorm Warning	TOP	Anderson, Franklin	23 min
Jun 20, 9:34 PM CDT	Special Weather Statement	TOP	Franklin	26 min
Jun 20, 11:19 PM CDT	Special Weather Statement	TOP	Anderson	26 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.