Alert archive / Kansas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 134, NWS Topeka, KS

August 13, 2021Coffey County, Lyon County, Kansas

NWS Topeka, KS issued this severe thunderstorm warning at Aug 13, 2021, 2:07 AM CDT for Coffey County, Lyon County, Kansas. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 13, 2021, 2:07 AM CDT (07:07 UTC)
Expired
Aug 13, 2021, 2:45 AM CDT
In force
38 min
Issued by
NWS Topeka, KS
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Coffey County, KS, Lyon County, KS

The radar

The Topeka radar (KTWX), 78 km from the middle of the area, began a volume at 07:09 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.

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 7.1 hours before the alert went out and 89 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 00:00Z on 2021-08-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4214 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Topeka, KS at 00:00Z on 2021-08-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 110 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
4214 J/kg
Mixed-layer CIN
-86 J/kg
Mixed-layer LCL
1420 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
110 m²/s²
0-3 km storm-relative helicity
179 m²/s²
Significant tornado parameter
0.0
Supercell composite
6.4

Open this sounding in Storm Lab

The text

As transmitted.

661 
WUUS53 KTOP 130707
SVRTOP
KSC031-111-130745-
/O.NEW.KTOP.SV.W.0134.210813T0707Z-210813T0745Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Topeka KS
207 AM CDT Fri Aug 13 2021

The National Weather Service in Topeka has issued a

* Severe Thunderstorm Warning for...
  West central Coffey County in east central Kansas...
  Southern Lyon County in east central Kansas...

* Until 245 AM CDT.

* At 206 AM CDT, a severe thunderstorm was located 4 miles southeast
  of Emporia, moving southeast at 25 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Trained weather spotters. At 204 AM CDT Emporia Municipal 
           Airport measured a wind gust of 64 mph.

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

* Locations impacted include...
  Emporia, Olpe, Hartford and Neosho Rapids. 

This includes the following highways...
 Interstate 35 between mile markers 128 and 142.
 Kansas Turnpike between mile markers 123 and 132.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3817 9626 3844 9629 3853 9603 3817 9583
TIME...MOT...LOC 0706Z 324DEG 20KT 3836 9612 

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

$$

Reese
2 follow-up statements
034 
WWUS53 KTOP 130727
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
227 AM CDT Fri Aug 13 2021

KSC031-111-130745-
/O.CON.KTOP.SV.W.0134.000000T0000Z-210813T0745Z/
Coffey-Lyon-
227 AM CDT Fri Aug 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 AM CDT
FOR WEST CENTRAL COFFEY AND SOUTHERN LYON COUNTIES...

At 226 AM CDT, a severe thunderstorm was located near Olpe, moving
southeast at 25 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Emporia, Olpe, Hartford and Neosho Rapids. 

This includes the following highways...
 Interstate 35 between mile markers 128 and 142.
 Kansas Turnpike between mile markers 123 and 132.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3817 9626 3844 9629 3853 9603 3817 9583
TIME...MOT...LOC 0726Z 327DEG 20KT 3824 9611 

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

$$

Reese
501 
WWUS53 KTOP 130746
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
246 AM CDT Fri Aug 13 2021

KSC031-111-130756-
/O.EXP.KTOP.SV.W.0134.000000T0000Z-210813T0745Z/
Coffey-Lyon-
246 AM CDT Fri Aug 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL COFFEY AND
SOUTHERN LYON COUNTIES HAS EXPIRED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been allowed to expire.  However heavy
rain is still possible with this thunderstorm.

LAT...LON 3817 9626 3844 9629 3853 9603 3817 9583
TIME...MOT...LOC 0746Z 324DEG 20KT 3816 9603 

$$

Reese

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 12, 7:19 PM CDTSevere Thunderstorm WarningTOPCloud, Republic26 min
Aug 12, 7:31 PM CDTSpecial Weather StatementTOPDouglas29 min
Aug 12, 8:58 PM CDTSpecial Weather StatementTOPMorris32 min
Aug 12, 9:06 PM CDTSevere Thunderstorm WarningTOPMorris24 min
Aug 12, 9:29 PM CDTSpecial Weather StatementTOPFranklin31 min
Aug 12, 9:43 PM CDTSpecial Weather StatementTOPDickinson47 min
Aug 12, 9:46 PM CDTSevere Thunderstorm WarningTOPDouglas, Franklin29 min
Aug 12, 10:02 PM CDTSpecial Weather StatementTOPDickinson43 min
Aug 12, 10:18 PM CDTSpecial Weather StatementTOPFranklin42 min
Aug 12, 10:38 PM CDTSevere Thunderstorm WarningTOPDouglas, Franklin37 min
Aug 12, 10:49 PM CDTAreal Flood AdvisoryTOPDouglas, Franklin5 hr
Aug 12, 11:06 PM CDTSevere Thunderstorm WarningTOPDouglas, Franklin24 min
Aug 12, 11:55 PM CDTFlash Flood WarningTOPDouglas, Franklin, Shawnee3 min
Aug 13, 12:01 AM CDTFlash Flood WarningTOPDouglas, Franklin6 hr
Aug 13, 12:11 AM CDTAreal Flood AdvisoryTOPDouglas, Jefferson3 hr
Aug 13, 12:22 AM CDTSevere Thunderstorm WarningTOPBrown, Jackson, Nemaha23 min
Aug 13, 12:43 AM CDTSevere Thunderstorm WarningTOPBrown17 min
Aug 13, 12:55 AM CDTSpecial Weather StatementTOPBrown35 min
Aug 13, 1:19 AM CDTSpecial Weather StatementTOPMarshall41 min
Aug 13, 1:38 AM CDTSpecial Weather StatementTOPDouglas, Jefferson52 min
Aug 13, 1:49 AM CDTAreal Flood AdvisoryTOPBrown, Jackson, Marshall, Nemaha5 hr
Aug 13, 1:56 AM CDTSpecial Weather StatementTOPLyon49 min
Aug 13, 2:10 AM CDTFlash Flood WarningTOPLyon, Osage4 hr
Aug 13, 2:18 AM CDTFlash Flood WarningTOPDouglas, Franklin, Jefferson4 hr
Aug 13, 2:44 AM CDTSpecial Weather StatementTOPWabaunsee46 min
Aug 13, 2:51 AM CDTFlash Flood WarningTOPLyon4 hr
Aug 13, 3:15 AM CDTAreal Flood AdvisoryTOPDouglas, Jefferson, Osage, Shawnee3 hr
Aug 13, 3:51 AM CDTAreal Flood AdvisoryTOPRepublic, Washington3 hr
Aug 13, 6:09 AM CDTAreal Flood AdvisoryTOPLyon, Osage105 min
Aug 13, 6:27 AM CDTAreal Flood AdvisoryTOPDouglas, Franklin2 hr
Aug 13, 6:30 AM CDTAreal Flood AdvisoryTOPDouglas, Franklin, Jefferson2 hr
Aug 13, 6:52 AM CDTAreal Flood AdvisoryTOPLyon53 min
Aug 13, 9:08 AM CDTRiver Flood WarningTOPWashington4 hr

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.