Alert archive / Kansas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 115, NWS Topeka, KS

August 7, 2021Cloud County, Ottawa County, Kansas

NWS Topeka, KS issued this severe thunderstorm warning at Aug 7, 2021, 8:42 PM CDT for Cloud County, Ottawa County, Kansas. It was in force for 33 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: Aug 7, 2021, 8:42 PM CDT (01:42 UTC)
Expired: Aug 7, 2021, 9:15 PM CDT
In force: 33 min
Issued by: NWS Topeka, KS
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Cloud County, KS, Ottawa County, KS

The radar

The Grand Island radar (KUEX), 130 km from the middle of the area, began a volume at 01:44 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
Aug 7, 8:45 PM CDT	TSTM WND GST 60	Culver, KS	REPORT OF 6 INCH TREE LIMBS DOWN AND 60 MPH WINDS.

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
Aug 7, 6:35 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 1.7 hours before the alert went out and 181 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: 1803 J/kg
Mixed-layer CIN: -63 J/kg
Mixed-layer LCL: 1923 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 157 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 7.5

Open this sounding in Storm Lab

The text

As transmitted.

040 
WUUS53 KTOP 080142
SVRTOP
KSC029-143-080215-
/O.NEW.KTOP.SV.W.0115.210808T0142Z-210808T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Topeka KS
842 PM CDT Sat Aug 7 2021

The National Weather Service in Topeka has issued a

* Severe Thunderstorm Warning for...
  Ottawa County in north central Kansas...
  Cloud County in north central Kansas...

* Until 915 PM CDT.

* At 842 PM CDT, severe thunderstorms were located along a line
  extending from 7 miles south of Concordia to 6 miles south of
  Tescott, moving northeast at 50 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Minneapolis, Clyde, Bennington, Miltonvale, Glasco, Delphos,
  Tescott, Culver, Wells, Aurora, Niles and Ada.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3948 9793 3960 9737 3896 9737 3896 9793
TIME...MOT...LOC 0142Z 242DEG 45KT 3947 9771 3891 9788 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Reese

2 follow-up statements

591 
WWUS53 KTOP 080200
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
900 PM CDT Sat Aug 7 2021

KSC029-143-080215-
/O.CON.KTOP.SV.W.0115.000000T0000Z-210808T0215Z/
Ottawa-Cloud-
900 PM CDT Sat Aug 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR OTTAWA AND SOUTHERN CLOUD COUNTIES...

At 859 PM CDT, severe thunderstorms were located along a line
extending from 5 miles southwest of Clyde to 4 miles southwest of
Bennington, moving east at 50 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Minneapolis, Clyde, Bennington, Miltonvale, Delphos, Tescott, Culver,
Wells, Aurora and Niles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3951 9777 3960 9737 3896 9737 3896 9793
TIME...MOT...LOC 0159Z 270DEG 45KT 3956 9749 3900 9766 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Reese

971 
WWUS53 KTOP 080211
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
911 PM CDT Sat Aug 7 2021

KSC029-143-080220-
/O.EXP.KTOP.SV.W.0115.000000T0000Z-210808T0215Z/
Ottawa-Cloud-
911 PM CDT Sat Aug 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR OTTAWA AND SOUTHERN CLOUD
COUNTIES WILL EXPIRE AT 915 PM CDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.  However gusty
winds are still possible with these thunderstorms.

A Severe Thunderstorm Watch remains in effect until 100 AM CDT for
central and north central Kansas.

Remember, a Severe Thunderstorm Warning still remains in effect for
southeast Ottawa County until 1000 PM CDT.

LAT...LON 3951 9777 3960 9737 3896 9737 3896 9793
TIME...MOT...LOC 0210Z 270DEG 45KT 3962 9734 3906 9752 

$$

Reese

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 8:19 PM CDT	Severe Thunderstorm Warning	TOP	Cloud, Republic	41 min
Aug 7, 8:26 PM CDT	Special Weather Statement	TOP	Cloud, Ottawa	49 min
Aug 7, 8:56 PM CDT	Severe Thunderstorm Warning	TOP	Clay, Riley, Washington	49 min
Aug 7, 9:08 PM CDT	Severe Thunderstorm Warning	TOP	Clay, Dickinson, Geary, Morris, Ottawa, Riley	52 min
Aug 7, 9:41 PM CDT	Severe Thunderstorm Warning	TOP	Clay, Marshall, Pottawatomie, Riley, Washington	49 min
Aug 7, 9:49 PM CDT	Severe Thunderstorm Warning Considerable damage threat	TOP	Geary, Lyon, Morris, Pottawatomie, Riley, Wabaunsee	41 min
Aug 7, 10:28 PM CDT	Special Weather Statement	TOP	Morris, Wabaunsee	32 min
Aug 7, 10:29 PM CDT	Special Weather Statement	TOP	Nemaha	31 min
Aug 7, 10:56 PM CDT	Special Weather Statement	TOP	Jackson, Shawnee	34 min
Aug 7, 11:28 PM CDT	Special Weather Statement	TOP	Brown, Douglas, Jackson, Jefferson, Lyon, Morris and 3 more	32 min
Aug 8, 12:00 AM CDT	Special Weather Statement	TOP	Anderson, Coffey, Douglas, Franklin, Lyon, Osage	30 min
Aug 8, 2:27 PM CDT	Heat Advisory	TOP	Anderson, Brown, Clay, Cloud, Coffey, Dickinson and 17 more	4 days

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.