Alert archive / Kansas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 45, NWS Topeka, KS

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

NWS Topeka, KS issued this severe thunderstorm warning at Jun 11, 2021, 12:56 PM CDT for Brown County, Jackson County, Nemaha County, Kansas. It was in force for 49 min. 2 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, 12:56 PM CDT (17:56 UTC)
Expired
Jun 11, 2021, 1:45 PM CDT
In force
49 min
Issued by
NWS Topeka, KS
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Brown County, KS, Jackson County, KS, Nemaha County, KS

The radar

The Topeka radar (KTWX), 98 km from the middle of the area, began a volume at 17:56 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, 1:05 PM CDTTSTM WND DMGFairview, KSREPORT OF HOUSE BLOWN OFF FOUNDATION. TIME ESTIMATED BY RADAR.
Jun 11, 1:17 PM CDTTSTM WND DMGHiawatha, KSTREES REPORTED DOWN IN CITY. 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, 5.9 hours before the alert went out and 81 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.

911 
WUUS53 KTOP 111756
SVRTOP
KSC013-085-131-111845-
/O.NEW.KTOP.SV.W.0045.210611T1756Z-210611T1845Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Topeka KS
1256 PM CDT Fri Jun 11 2021

The National Weather Service in Topeka has issued a

* Severe Thunderstorm Warning for...
  Northeastern Jackson County in northeastern Kansas...
  Southeastern Nemaha County in northeastern Kansas...
  Brown County in northeastern Kansas...

* Until 145 PM CDT.

* At 1256 PM CDT, severe thunderstorms were located along a line
  extending from 4 miles west of Reserve to 4 miles west of Powhattan
  to 4 miles southeast of Goff, moving east at 30 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Severe thunderstorms will be near...
  Morrill, Hamlin and Kickapoo Reservation around 100 PM CDT.
  Reserve and Powhattan around 105 PM CDT.
  Hiawatha, Netawaka and Willis around 115 PM CDT.

Other locations in the path of these severe thunderstorms include
Everest, Robinson, Whiting, Horton and Horton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3966 9534 3965 9556 3948 9557 3960 9608
      3978 9579 4000 9573 4000 9534
TIME...MOT...LOC 1756Z 273DEG 27KT 3999 9564 3978 9571 3961 9590 

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

Omitt
1 follow-up statement
832 
WWUS53 KTOP 111833
SVSTOP

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

KSC131-111842-
/O.CAN.KTOP.SV.W.0045.000000T0000Z-210611T1845Z/
Nemaha-
133 PM CDT Fri Jun 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN NEMAHA 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 3951 9557 3954 9570 3976 9545 4000 9537
      4000 9534 3966 9534 3965 9556
TIME...MOT...LOC 1832Z 272DEG 27KT 3998 9531 3977 9538 3955 9563 

$$

KSC013-085-111845-
/O.CON.KTOP.SV.W.0045.000000T0000Z-210611T1845Z/
Jackson-Brown-
133 PM CDT Fri Jun 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM CDT
FOR NORTHEASTERN JACKSON AND EASTERN BROWN COUNTIES...

At 132 PM CDT, severe thunderstorms were located along a line
extending from White Cloud to 3 miles south of Robinson to near
Whiting, moving east at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

These severe thunderstorms will remain over mainly rural areas of
northeastern Jackson and eastern Brown Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3951 9557 3954 9570 3976 9545 4000 9537
      4000 9534 3966 9534 3965 9556
TIME...MOT...LOC 1832Z 272DEG 27KT 3998 9531 3977 9538 3955 9563 

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, 12:19 PM CDTSevere Thunderstorm WarningTOPBrown, Marshall, Nemaha41 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.