Alert archive / Kansas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 48, NWS Topeka, KS

June 11, 2021Jefferson County, Kansas

NWS Topeka, KS issued this severe thunderstorm warning at Jun 11, 2021, 2:10 PM CDT for Jefferson County, Kansas. It was in force for 35 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, 2:10 PM CDT (19:10 UTC)
Expired
Jun 11, 2021, 2:45 PM CDT
In force
35 min
Issued by
NWS Topeka, KS
Area
Storm-based polygon
Hail
0.75 in
Wind
80.0 mph

County Jefferson County, KS

The radar

The Topeka radar (KTWX), 78 km from the middle of the area, began a volume at 19:14 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, 2:13 PM CDTTSTM WND GST 771 N Meriden, KS
Jun 11, 2:13 PM CDTHAIL 14 Nw Ozawkie, KS
Jun 11, 2:15 PM CDTTSTM WND GST 752 S Meriden, KS
Jun 11, 2:21 PM CDTTSTM WND GST 58Winchester, KS
Jun 11, 2:25 PM CDTTSTM WND GST 73Winchester, KSCORRECTS PREVIOUS TSTM WND GST REPORT FROM WINCHESTER.

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, 12:32 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 7.2 hours before the alert went out and 34 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.

845 
WUUS53 KTOP 111910
SVRTOP
KSC087-111945-
/O.NEW.KTOP.SV.W.0048.210611T1910Z-210611T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Topeka KS
210 PM CDT Fri Jun 11 2021

The National Weather Service in Topeka has issued a

* Severe Thunderstorm Warning for...
  Jefferson County in northeastern Kansas...

* Until 245 PM CDT.

* At 209 PM CDT, severe thunderstorms were located along a line
  extending from 4 miles northeast of Winchester to 4 miles south of
  Hoyt, moving southeast at 35 mph.

  These are very dangerous storms.

  HAZARD...80 mph wind gusts.

  SOURCE...Emergency management.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be heavily damaged. Expect 
           considerable damage to roofs, windows, and vehicles. 
           Extensive tree damage and power outages are likely.

* Severe thunderstorms will be near...
  Winchester around 215 PM CDT.

Other locations in the path of these severe thunderstorms include
Perry Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3920 9518 3910 9548 3910 9550 3914 9559
      3928 9559 3942 9537 3942 9518
TIME...MOT...LOC 1909Z 308DEG 32KT 3935 9520 3919 9570 

HAIL...<.75IN
WIND...80MPH
 
$$

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, 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, 2:21 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.