Alert archive / Kansas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 21, NWS Topeka, KS

April 11, 2020Pottawatomie County, Kansas

NWS Topeka, KS issued this severe thunderstorm warning at Apr 11, 2020, 11:58 PM CDT for Pottawatomie County, Kansas. It was in force for 47 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
Apr 11, 2020, 11:58 PM CDT (04:58 UTC)
Expired
Apr 12, 2020, 12:45 AM CDT
In force
47 min
Issued by
NWS Topeka, KS
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Pottawatomie County, KS

The radar

The Topeka radar (KTWX), 59 km from the middle of the area, began a volume at 04:57 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 11, 5:35 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 5.0 hours before the alert went out and 91 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 2020-04-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 934 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 00:00Z on 2020-04-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 square meters per square second.1939587897Sfc1 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
934 J/kg
Mixed-layer CIN
-39 J/kg
Mixed-layer LCL
2123 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
120 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.8

Open this sounding in Storm Lab

The text

As transmitted.

223 
WUUS53 KTOP 120458
SVRTOP
KSC149-120545-
/O.NEW.KTOP.SV.W.0021.200412T0458Z-200412T0545Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Topeka KS
1158 PM CDT Sat Apr 11 2020

The National Weather Service in Topeka has issued a

* Severe Thunderstorm Warning for...
  Northwestern Pottawatomie County in northeastern Kansas...

* Until 1245 AM CDT.

* At 1157 PM CDT, a severe thunderstorm was located near Olsburg,
  moving northeast at 15 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Trained weather spotters.

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

* Locations impacted include...
  Blaine and Olsburg. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3942 9633 3941 9666 3949 9667 3951 9665
      3957 9644 3957 9640
TIME...MOT...LOC 0457Z 246DEG 11KT 3947 9656 

HAIL...1.00IN
WIND...60MPH
 
$$
JP
2 follow-up statements
836 
WWUS53 KTOP 120522
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
1222 AM CDT Sun Apr 12 2020

KSC149-120545-
/O.CON.KTOP.SV.W.0021.000000T0000Z-200412T0545Z/
Pottawatomie-
1222 AM CDT Sun Apr 12 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 AM CDT
FOR NORTH CENTRAL POTTAWATOMIE COUNTY...

At 1221 AM CDT, a severe thunderstorm was located 4 miles west of
Blaine, moving northeast at 15 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...
Blaine.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3944 9634 3944 9652 3948 9655 3953 9657
      3957 9644 3957 9640
TIME...MOT...LOC 0521Z 247DEG 13KT 3950 9649 

HAIL...1.00IN
WIND...60MPH
 
$$
121 
WWUS53 KTOP 120541
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
1241 AM CDT Sun Apr 12 2020

KSC149-120551-
/O.EXP.KTOP.SV.W.0021.000000T0000Z-200412T0545Z/
Pottawatomie-
1241 AM CDT Sun Apr 12 2020

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL POTTAWATOMIE
COUNTY WILL EXPIRE AT 1245 AM 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 heavy rain are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 100 AM CDT for
northeastern Kansas.

LAT...LON 3944 9634 3944 9652 3948 9655 3953 9657
      3957 9644 3957 9640
TIME...MOT...LOC 0541Z 246DEG 11KT 3952 9642 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 11, 7:03 PM CDTSevere Thunderstorm WarningTOPWabaunsee57 min
Apr 11, 7:23 PM CDTSpecial Weather StatementTOPMorris37 min
Apr 11, 7:35 PM CDTSevere Thunderstorm WarningTOPLyon, Osage, Shawnee, Wabaunsee55 min
Apr 11, 7:40 PM CDTSevere Thunderstorm WarningTOPJackson, Shawnee, Wabaunsee50 min
Apr 11, 7:56 PM CDTSevere Thunderstorm WarningTOPDouglas, Jefferson, Shawnee49 min
Apr 11, 8:04 PM CDTSevere Thunderstorm WarningTOPJackson, Jefferson26 min
Apr 11, 8:08 PM CDTSpecial Weather StatementTOPLyon52 min
Apr 11, 8:09 PM CDTSevere Thunderstorm WarningTOPOsage, Shawnee, Wabaunsee36 min
Apr 11, 8:27 PM CDTSevere Thunderstorm WarningTOPJackson, Shawnee, Wabaunsee33 min
Apr 11, 8:48 PM CDTSpecial Weather StatementTOPShawnee42 min
Apr 11, 9:17 PM CDTSpecial Weather StatementTOPJefferson43 min
Apr 11, 9:33 PM CDTSpecial Weather StatementTOPJackson27 min
Apr 11, 9:40 PM CDTSevere Thunderstorm WarningTOPJackson50 min
Apr 11, 9:46 PM CDTSpecial Weather StatementTOPPottawatomie29 min
Apr 11, 10:16 PM CDTSevere Thunderstorm WarningTOPBrown, Jackson, Marshall, Nemaha, Pottawatomie, Riley44 min
Apr 11, 10:42 PM CDTSpecial Weather StatementTOPJackson33 min
Apr 11, 10:57 PM CDTSevere Thunderstorm WarningTOPJackson, Marshall, Nemaha, Pottawatomie, Riley48 min
Apr 11, 11:20 PM CDTSevere Thunderstorm WarningTOPJackson, Jefferson40 min
Apr 11, 11:22 PM CDTSevere Thunderstorm WarningTOPPottawatomie38 min
Apr 11, 11:26 PM CDTFlash Flood WarningTOPJackson4 hr
Apr 11, 11:39 PM CDTFlash Flood WarningTOPPottawatomie4 hr
Apr 12, 12:18 AM CDTSpecial Weather StatementTOPJackson27 min
Apr 12, 12:45 AM CDTSpecial Weather StatementTOPPottawatomie30 min
Apr 12, 1:08 AM CDTSpecial Weather StatementTOPJackson37 min
Apr 12, 3:24 AM CDTAreal Flood WarningTOPJackson6 hr
Apr 12, 3:49 AM CDTAreal Flood WarningTOPPottawatomie6 hr
Apr 12, 4:19 AM CDTFreeze WarningTOPAnderson, Brown, Clay, Cloud, Coffey, Dickinson and 17 more30 hr
Apr 12, 10:51 AM CDTSpecial Weather StatementTOPJefferson24 min
Apr 12, 11:14 AM CDTSpecial Weather StatementTOPJefferson31 min
Apr 12, 11:26 AM CDTSpecial Weather StatementTOPDouglas34 min

Nearby

Severe Thunderstorm Warnings in Kansas, 2020Every severe thunderstorm warning in 2020

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.