Alert archive / Kansas / Tornado Warnings in 2011

Tornado Warning 2, NWS Topeka, KS

April 8, 2011Morris County, Kansas

NWS Topeka, KS issued this tornado warning at Apr 8, 2011, 9:54 PM CDT for Morris County, Kansas. It was in force for 26 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 8, 2011, 9:54 PM CDT (02:54 UTC)
Expired
Apr 8, 2011, 10:20 PM CDT
In force
26 min
Issued by
NWS Topeka, KS
Area
Storm-based polygon

County Morris County, KS

The radar

The Topeka radar (KTWX), 53 km from the middle of the area, began a volume at 02:54 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 8, 9:01 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 2.9 hours before the alert went out and 94 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 2011-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1028 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 2011-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 354 square meters per square second.19395878Sfc1 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
1028 J/kg
Mixed-layer CIN
-353 J/kg
Mixed-layer LCL
980 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
354 m²/s²
0-3 km storm-relative helicity
409 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

132 
WFUS53 KTOP 090254
TORTOP
KSC127-090330-
/O.NEW.KTOP.TO.W.0002.110409T0254Z-110409T0330Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TOPEKA KS
954 PM CDT FRI APR 8 2011

THE NATIONAL WEATHER SERVICE IN TOPEKA HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN MORRIS COUNTY IN EAST CENTRAL KANSAS...

* UNTIL 1030 PM CDT

* AT 949 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH STRONG ROTATION CAPABLE OF PRODUCING A
  TORNADO.  THIS SEVERE STORM WAS LOCATED 12 MILES SOUTH OF WILSEY...
  OR 16 MILES SOUTHWEST OF COUNCIL GROVE...MOVING NORTHEAST AT 20
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  WILSEY...
  COUNCIL GROVE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORNADOS ARE DIFFICULT TO SEE AT NIGHT. TAKE COVER NOW! IF YOU WAIT
TO SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A SAFE PLACE.

STAY TUNED TO WEATHER RADIO OR LOCAL MEDIA OUTLETS FOR THE LATEST
SEVERE WEATHER INFORMATION.

&&

LAT...LON 3868 9669 3867 9636 3851 9648 3851 9677
TIME...MOT...LOC 0254Z 212DEG 18KT 3848 9663
HAIL 2.00IN

$$

BLAIR
1 follow-up statement
198 
WWUS53 KTOP 090320
SVSTOP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TOPEKA KS
1020 PM CDT FRI APR 8 2011

KSC127-090330-
/O.CAN.KTOP.TO.W.0002.000000T0000Z-110409T0330Z/
MORRIS-
1020 PM CDT FRI APR 8 2011

...THE TORNADO WARNING FOR SOUTHEASTERN MORRIS COUNTY HAS BEEN
CANCELLED...

AT 1020 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED THAT THE
SEVERE THUNDERSTORM WITH THE POSSIBLE TORNADO HAD WEAKENED AND NO
LONGER APPEARED CAPABLE OF PRODUCING TORNADOES OR OTHER SEVERE
WEATHER...THUS THE WARNING HAS BEEN CANCELLED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

RADAR INDICATED THAT HAIL UP TO GOLFBALL SIZE WAS STILL POSSIBLE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT. STAY ALERT TO THE
WEATHER.

STAY TUNED TO NOAA WEATHER RADIO OR LOCAL MEDIA OUTLETS FOR THE
LATEST SEVERE WEATHER INFORMATION.

&&

LAT...LON 3868 9669 3867 9636 3851 9648 3851 9677
TIME...MOT...LOC 0320Z 212DEG 18KT 3859 9654

$$

BLAIR

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 8, 8:40 PM CDTSpecial Weather StatementTOPLyon35 min
Apr 8, 8:45 PM CDTSpecial Weather StatementTOPCoffey15 min
Apr 8, 8:55 PM CDTSevere Thunderstorm WarningTOPAnderson, Coffey, Franklin50 min
Apr 8, 9:00 PM CDTSevere Thunderstorm WarningTOPMorris45 min
Apr 8, 9:43 PM CDTSevere Thunderstorm WarningTOPGeary, Morris, Wabaunsee47 min
Apr 8, 10:13 PM CDTSpecial Weather StatementTOPWabaunsee32 min
Apr 8, 10:28 PM CDTSevere Thunderstorm WarningTOPMorris31 min
Apr 8, 10:49 PM CDTSevere Thunderstorm WarningTOPJefferson18 min
Apr 9, 4:49 AM CDTFire Weather WatchTOPAnderson, Brown, Clay, Cloud, Coffey, Dickinson and 17 more22 hr
Apr 9, 5:42 AM CDTDense Fog AdvisoryTOPBrown, Clay, Cloud, Jackson, Marshall, Nemaha and 4 more3 hr
Apr 9, 2:48 PM CDTRed Flag WarningTOPAnderson, Brown, Clay, Cloud, Coffey, Dickinson and 17 more29 hr

Nearby

Tornado Warnings in Kansas, 2011Every tornado warning in 2011Tornadoes in 2011

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.