Alert archive / Kansas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 44, NWS Topeka, KS

June 11, 2021Brown County, Marshall County, Nemaha County, Kansas

NWS Topeka, KS issued this severe thunderstorm warning at Jun 11, 2021, 12:19 PM CDT for Brown County, Marshall County, Nemaha County, Kansas. It was in force for 41 min. 5 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, 12:19 PM CDT (17:19 UTC)
Expired
Jun 11, 2021, 1:00 PM CDT
In force
41 min
Issued by
NWS Topeka, KS
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Brown County, KS, Marshall County, KS, Nemaha County, KS

The radar

The Topeka radar (KTWX), 99 km from the middle of the area, began a volume at 17:20 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

TimeReportWhereRemark
Jun 11, 12:31 PM CDTTSTM WND DMGBern, KSTREE DAMAGE IN TOWN. POWER POLES SNAPPED AROUND BERN.
Jun 11, 12:46 PM CDTTSTM WND DMG1 E Sabetha, KSREPORT OF AIRCRAFT OVERTURNED, AND DAMAGE TO AIRCRAFT HANGER. TIME ESTIMATED BY RADAR.
Jun 11, 12:46 PM CDTTSTM WND DMGSabetha, KSTREES REPORTED TO HAVE FALLEN ON HOUSE. TIME ESTIMATED BY RADAR.
Jun 11, 12:46 PM CDTTSTM WND GST 601 E Sabetha, KSTIME ESTIMATED BY RADAR.
Jun 11, 1:05 PM CDTTSTM WND DMGFairview, KSREPORT OF HOUSE BLOWN OFF FOUNDATION. TIME ESTIMATED BY RADAR.

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.

IssuedProductOfficeLasted
Jun 11, 8:30 AM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 5.3 hours before the alert went out and 93 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-pSkew-T log-p diagram, Topeka, KS at 12:00Z on 2021-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2135 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Topeka, KS at 12:00Z on 2021-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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.

488 
WUUS53 KTOP 111719
SVRTOP
KSC013-117-131-111800-
/O.NEW.KTOP.SV.W.0044.210611T1719Z-210611T1800Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Topeka KS
1219 PM CDT Fri Jun 11 2021

The National Weather Service in Topeka has issued a

* Severe Thunderstorm Warning for...
  Nemaha County in northeastern Kansas...
  Brown County in northeastern Kansas...
  East central Marshall County in northeastern Kansas...

* Until 100 PM CDT.

* At 1219 PM CDT, severe thunderstorms were located along a line
  extending from near Bern to near Seneca to 3 miles northeast of
  Vermillion, moving east at 40 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Severe thunderstorms will be near...
  Bern around 1225 PM CDT.
  Sabetha and Oneida around 1230 PM CDT.
  Corning around 1235 PM CDT.

Other locations in the path of these severe thunderstorms include
Morrill, Goff, Fairview, Reserve, Hamlin, Woodlawn, Hiawatha,
Robinson, Powhattan, Willis and Kickapoo Reservation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4000 9534 3978 9534 3965 9572 3964 9604
      3967 9640 3986 9616 4000 9603
TIME...MOT...LOC 1719Z 275DEG 38KT 3999 9595 3986 9607 3976 9622 

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

Omitt
1 follow-up statement
903 
WWUS53 KTOP 111740
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
1240 PM CDT Fri Jun 11 2021

KSC117-111750-
/O.CAN.KTOP.SV.W.0044.000000T0000Z-210611T1800Z/
Marshall-
1240 PM CDT Fri Jun 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL MARSHALL COUNTY
IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 300 PM CDT for
northeastern Kansas.

LAT...LON 4000 9534 3978 9534 3965 9571 3964 9604
      3966 9624 3969 9624 3985 9611 4000 9603
TIME...MOT...LOC 1740Z 270DEG 26KT 3999 9576 3986 9588 3976 9603 

$$

KSC013-131-111800-
/O.CON.KTOP.SV.W.0044.000000T0000Z-210611T1800Z/
Nemaha-Brown-
1240 PM CDT Fri Jun 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 PM CDT
FOR NEMAHA AND BROWN COUNTIES...

At 1240 PM CDT, severe thunderstorms were located along a line
extending from 5 miles northwest of Morrill to 3 miles east of Oneida
to 5 miles east of Centralia, moving east at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
  Morrill, Sabetha, Fairview, Reserve, Hamlin, Hiawatha, Robinson, 
  Powhattan and Kickapoo Reservation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4000 9534 3978 9534 3965 9571 3964 9604
      3966 9624 3969 9624 3985 9611 4000 9603
TIME...MOT...LOC 1740Z 270DEG 26KT 3999 9576 3986 9588 3976 9603 

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

Omitt

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 11, 12:10 PM CDTSpecial Weather StatementTOPNemaha35 min
Jun 11, 12:56 PM CDTSevere Thunderstorm WarningTOPBrown, Jackson, Nemaha49 min
Jun 11, 1:28 PM CDTSevere Thunderstorm WarningTOPJackson, Jefferson47 min
Jun 11, 2:03 PM CDTSevere Thunderstorm WarningTOPDouglas, Jefferson, Shawnee42 min
Jun 11, 2:10 PM CDTSevere Thunderstorm WarningTOPJefferson35 min
Jun 11, 2:21 PM CDTSpecial Weather StatementTOPShawnee, Wabaunsee24 min
Jun 11, 2:25 PM CDTSevere Thunderstorm WarningTOPJackson19 min
Jun 11, 2:40 PM CDTSevere Thunderstorm WarningTOPDouglas, Jefferson, Shawnee50 min
Jun 11, 3:08 PM CDTAreal Flood AdvisoryTOPDouglas3 hr
Jun 11, 3:20 PM CDTSevere Thunderstorm WarningTOPJackson, Jefferson25 min
Jun 11, 3:35 PM CDTSevere Thunderstorm WarningTOPJackson25 min
Jun 11, 4:05 PM CDTSevere Thunderstorm WarningTOPCoffey, Douglas, Franklin, Osage40 min
Jun 11, 4:45 PM CDTSevere Thunderstorm WarningTOPAnderson, Franklin30 min
Jun 11, 5:15 PM CDTSevere Thunderstorm WarningTOPAnderson, Franklin30 min
Jun 11, 5:32 PM CDTSevere Thunderstorm WarningTOPAnderson, Coffey28 min
Jun 11, 6:01 PM CDTSevere Thunderstorm WarningTOPAnderson, Coffey29 min

Nearby

Severe Thunderstorm Warnings in Kansas, 2021Every 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.