Alert archive / Kansas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 112, NWS Topeka, KS

July 10, 2021Douglas County, Kansas

NWS Topeka, KS issued this severe thunderstorm warning at Jul 10, 2021, 7:22 PM CDT for Douglas County, Kansas. It was in force for 38 min. 1 report 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: Jul 10, 2021, 7:22 PM CDT (00:22 UTC)
Expired: Jul 10, 2021, 8:00 PM CDT
In force: 38 min
Issued by: NWS Topeka, KS
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

County Douglas County, KS

The radar

The Pleasant Hill radar (KEAX), 76 km from the middle of the area, began a volume at 00:24 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
Jul 10, 7:30 PM CDT	TSTM WND GST 60	Eudora, KS	DELAYED REPORT.

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
Jul 10, 2:18 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 0.4 hours before the alert went out and 45 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: 1434 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 1268 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 2 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.3

Open this sounding in Storm Lab

The text

As transmitted.

908 
WUUS53 KTOP 110022
SVRTOP
KSC045-110100-
/O.NEW.KTOP.SV.W.0112.210711T0022Z-210711T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Topeka KS
722 PM CDT Sat Jul 10 2021

The National Weather Service in Topeka has issued a

* Severe Thunderstorm Warning for...
  Northeastern Douglas County in east central Kansas...

* Until 800 PM CDT.

* At 722 PM CDT, severe thunderstorms were located along a line
  extending from 4 miles west of Bonner Springs to near Clinton Lake,
  moving southeast at 35 mph.

  HAZARD...70 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Eastern Lawrence and Eudora. 

This includes Kansas Turnpike between mile markers 202 and 205.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3874 9506 3900 9527 3902 9519 3896 9518
      3896 9517 3898 9516 3897 9513 3897 9511
      3895 9509 3896 9508 3898 9508 3899 9506
TIME...MOT...LOC 0022Z 304DEG 31KT 3905 9497 3894 9542 

HAIL...0.75IN
WIND...70MPH
 
$$

Baerg

3 follow-up statements

610 
WWUS53 KTOP 110023
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
723 PM CDT Sat Jul 10 2021

KSC045-110100-
/O.CON.KTOP.SV.W.0112.000000T0000Z-210711T0100Z/
Douglas-
723 PM CDT Sat Jul 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR NORTHEASTERN DOUGLAS COUNTY...

At 723 PM CDT, severe thunderstorms were located along a line
extending from 4 miles west of Bonner Springs to near Clinton Lake,
moving southeast at 35 mph.

HAZARD...70 mph wind gusts and penny size hail.

SOURCE...69 MPH winds were measured at the Lawrence Airport at 714 
         PM. 

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

Locations impacted include...
Eastern Lawrence and Eudora. 

This includes Kansas Turnpike between mile markers 202 and 205.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3874 9506 3900 9527 3902 9519 3896 9518
      3896 9517 3898 9516 3897 9513 3897 9511
      3895 9509 3896 9508 3898 9508 3899 9506
TIME...MOT...LOC 0023Z 304DEG 31KT 3905 9497 3894 9542 

HAIL...0.75IN
WIND...70MPH
 
$$

Baerg

394 
WWUS53 KTOP 110042
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
742 PM CDT Sat Jul 10 2021

KSC045-110100-
/O.CON.KTOP.SV.W.0112.000000T0000Z-210711T0100Z/
Douglas-
742 PM CDT Sat Jul 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR EAST CENTRAL DOUGLAS COUNTY...

At 741 PM CDT, a severe thunderstorm was located 4 miles south of
Eudora, moving east at 40 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Eudora.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3891 9519 3896 9518 3896 9517 3898 9516
      3897 9513 3897 9511 3895 9509 3896 9508
      3898 9508 3899 9506 3874 9506
TIME...MOT...LOC 0041Z 291DEG 34KT 3889 9513 

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

Baerg

908 
WWUS53 KTOP 110051
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
751 PM CDT Sat Jul 10 2021

KSC045-110100-
/O.EXP.KTOP.SV.W.0112.000000T0000Z-210711T0100Z/
Douglas-
751 PM CDT Sat Jul 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL DOUGLAS COUNTY
WILL EXPIRE AT 800 PM CDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
east central Kansas.

LAT...LON 3891 9519 3896 9518 3896 9517 3898 9516
      3897 9513 3897 9511 3895 9509 3896 9508
      3898 9508 3899 9506 3874 9506
TIME...MOT...LOC 0050Z 304DEG 31KT 3885 9506 

$$
Flanagan/Baerg

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 7:10 PM CDT	Severe Thunderstorm Warning	TOP	Douglas, Shawnee	35 min
Jul 10, 8:43 PM CDT	Special Weather Statement	TOP	Franklin	32 min
Jul 10, 9:32 PM CDT	Special Weather Statement	TOP	Anderson	28 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.