Alert archive / Kansas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 123, NWS Topeka, KS

August 10, 2021Cloud County, Ottawa County, Kansas

NWS Topeka, KS issued this severe thunderstorm warning at Aug 10, 2021, 8:41 PM CDT for Cloud County, Ottawa County, Kansas. It was in force for 49 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: Aug 10, 2021, 8:41 PM CDT (01:41 UTC)
Expired: Aug 10, 2021, 9:30 PM CDT
In force: 49 min
Issued by: NWS Topeka, KS
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cloud County, KS, Ottawa County, KS

The radar

The Grand Island radar (KUEX), 111 km from the middle of the area, began a volume at 01:42 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 10, 9:03 PM CDT	HAIL 1	6 S Jamestown, KS	ESTIMATED 50 MPH WINDS ALSO.
Aug 10, 9:17 PM CDT	TSTM WND GST 49	2 Sse Concordia, KS	CORRECTS PREVIOUS TSTM WND GST REPORT FROM 2 SSE CONCORDIA.
Aug 10, 9:25 PM CDT	TSTM WND GST 49	2 Sse Concordia, KS

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, 1.7 hours before the alert went out and 189 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: 2591 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 1584 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 134 m²/s²
0-3 km storm-relative helicity: 274 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 8.9

Open this sounding in Storm Lab

The text

As transmitted.

795 
WUUS53 KTOP 110141
SVRTOP
KSC029-143-110230-
/O.NEW.KTOP.SV.W.0123.210811T0141Z-210811T0230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Topeka KS
841 PM CDT Tue Aug 10 2021

The National Weather Service in Topeka has issued a

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

* Until 930 PM CDT.

* At 840 PM CDT, a severe thunderstorm was located 5 miles southwest
  of Asherville, moving northeast at 40 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...
  Concordia, Glasco, Delphos, Jamestown and Aurora. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3965 9793 3965 9747 3925 9748 3917 9793
TIME...MOT...LOC 0140Z 234DEG 34KT 3934 9803 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Reese

4 follow-up statements

707 
WWUS53 KTOP 110149
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
849 PM CDT Tue Aug 10 2021

KSC029-143-110230-
/O.CON.KTOP.SV.W.0123.000000T0000Z-210811T0230Z/
Ottawa-Cloud-
849 PM CDT Tue Aug 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM CDT
FOR NORTHWESTERN OTTAWA AND CLOUD COUNTIES...

At 847 PM CDT, a severe thunderstorm was located over Simpson, moving
northeast at 40 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Trained weather spotters. At 844 PM CDT trained spotters 
         reported ping pong ball size hail 3 miles south of Beloit.

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...
Concordia, Glasco, Delphos, Jamestown and Aurora. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3965 9793 3965 9747 3925 9748 3917 9793
TIME...MOT...LOC 0147Z 234DEG 34KT 3938 9795 

HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Reese

800 
WWUS53 KTOP 110203
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
903 PM CDT Tue Aug 10 2021

KSC029-143-110230-
/O.CON.KTOP.SV.W.0123.000000T0000Z-210811T0230Z/
Ottawa-Cloud-
903 PM CDT Tue Aug 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM CDT
FOR NORTHWESTERN OTTAWA AND CLOUD COUNTIES...

At 902 PM CDT, a severe thunderstorm was located 5 miles southeast of
Scottsville, moving northeast at 35 mph.

HAZARD...Two inch hail and 60 mph wind gusts.

SOURCE...Trained weather spotters. At 850 PM CDT trained spotters 
         reported baseball size hail 4 miles north of Asherville.

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...
Concordia, Glasco, Delphos, Jamestown and Aurora. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3965 9793 3965 9747 3925 9748 3917 9793
TIME...MOT...LOC 0202Z 248DEG 31KT 3948 9788 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...OBSERVED
MAX HAIL SIZE...2.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Reese

842 
WWUS53 KTOP 110216
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
916 PM CDT Tue Aug 10 2021

KSC143-110225-
/O.CAN.KTOP.SV.W.0123.000000T0000Z-210811T0230Z/
Ottawa-
916 PM CDT Tue Aug 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN OTTAWA 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 3965 9785 3965 9747 3931 9748 3931 9782
TIME...MOT...LOC 0215Z 248DEG 31KT 3952 9774 

$$

KSC029-110230-
/O.CON.KTOP.SV.W.0123.000000T0000Z-210811T0230Z/
Cloud-
916 PM CDT Tue Aug 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM CDT
FOR CLOUD COUNTY...

At 915 PM CDT, a severe thunderstorm was located 5 miles southwest of
Concordia, moving east at 35 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Trained weather spotters. At 903 PM CDT, a trained spotter 
         measured quarter size hail 6 miles south of Jamestown.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Concordia and Aurora. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3965 9785 3965 9747 3931 9748 3931 9782
TIME...MOT...LOC 0215Z 248DEG 31KT 3952 9774 

HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Reese

762 
WWUS53 KTOP 110225
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
925 PM CDT Tue Aug 10 2021

KSC029-110234-
/O.EXP.KTOP.SV.W.0123.000000T0000Z-210811T0230Z/
Cloud-
925 PM CDT Tue Aug 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR CLOUD COUNTY WILL EXPIRE AT
930 PM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However small hail
and gusty winds are still possible with this thunderstorm.

LAT...LON 3965 9785 3965 9747 3931 9748 3931 9782
TIME...MOT...LOC 0224Z 244DEG 32KT 3954 9765 

$$

Reese

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.