Alert archive / Kansas / Tornado Warnings in 2011

Tornado Warning 11, NWS Topeka, KS

May 21, 2011Jefferson County, Kansas

NWS Topeka, KS issued this tornado warning at May 21, 2011, 7:41 PM CDT for Jefferson County, Kansas. It was in force for 49 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
May 21, 2011, 7:41 PM CDT (00:41 UTC)
Expired
May 21, 2011, 8:30 PM CDT
In force
49 min
Issued by
NWS Topeka, KS
Area
Storm-based polygon

County Jefferson County, KS

The radar

The Topeka radar (KTWX), 85 km from the middle of the area, began a volume at 00:41 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
May 21, 8:01 PM CDTHAIL 24 Ne Oskaloosa, KS
May 21, 8:04 PM CDTHAIL 2.54 Ne Oskaloosa, KS
May 21, 8:05 PM CDTHAIL 1.255 N Mclouth, KS
May 21, 8:08 PM CDTHAIL 2.754 Ne Oskaloosa, KS
May 21, 8:10 PM CDTHAIL 22 Ese Oskaloosa, KS

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
May 21, 3:41 PM CDTSevere Thunderstorm WatchSPC9 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 0.7 hours before the alert went out and 245 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, Omaha, NE at 00:00Z on 2011-05-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1436 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, Omaha, NE at 00:00Z on 2011-05-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 99 square meters per square second.193958Sfc1 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
1436 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
1205 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
99 m²/s²
0-3 km storm-relative helicity
145 m²/s²
Significant tornado parameter
0.6
Supercell composite
5.0

Open this sounding in Storm Lab

The text

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

120 
WFUS53 KTOP 220041
TORTOP
KSC087-220130-
/O.NEW.KTOP.TO.W.0011.110522T0041Z-110522T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TOPEKA KS
741 PM CDT SAT MAY 21 2011

THE NATIONAL WEATHER SERVICE IN TOPEKA HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN JEFFERSON COUNTY IN NORTHEAST KANSAS...

* UNTIL 830 PM CDT

* AT 737 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A TORNADO 2 
  MILES SOUTHWEST OF OSKALOOSA. THE TORNADO WAS MOVING
  NORTHEAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  OSKALOOSA...MCLOUTH...WINCHESTER...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR SAFETY...GO TO A STORM SHELTER OR BASEMENT NOW!

LARGE DESTRUCTIVE HAIL IS ALSO LIKELY ALONG AND NORTH OF THE EXPECTED
TORNADO TRACK.

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

&&

LAT...LON 3910 9546 3927 9547 3943 9529 3942 9518
      3942 9517 3915 9517
TIME...MOT...LOC 0040Z 226DEG 29KT 3928 9530
HAIL 2.75IN

$$

ANGLE
4 follow-up statements
709 
WWUS53 KTOP 220053
SVSTOP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TOPEKA KS
753 PM CDT SAT MAY 21 2011

KSC087-220130-
/O.CON.KTOP.TO.W.0011.000000T0000Z-110522T0130Z/
JEFFERSON-
753 PM CDT SAT MAY 21 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR EASTERN
JEFFERSON COUNTY...

AT 746 PM CDT...RADAR INDICATED A STORM CAPABLE OF PRODUCING A 
TORNADO 7 MILES NORTHEAST OF OSKALOOSA...MOVING NORTHEAST AT 35 
MPH.  ANOTHER DEVELOPING SEVERE STORM WAS LOCATED NEAR OSKALOOSA AND 
ALSO HAS THE POTENTIAL TO PRODUCE A TORNADO.

LOCATIONS IMPACTED INCLUDE...
OSKALOOSA AND OTHERWISE MAINLY RURAL AREAS OF NORTHEASTERN JEFFERSON 
COUNTY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR SAFETY...GO TO A STORM SHELTER OR BASEMENT NOW!

LARGE DESTRUCTIVE HAIL IS ALSO LIKELY ALONG AND NORTH OF THE EXPECTED
TORNADO TRACK.

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

&&

LAT...LON 3910 9546 3927 9547 3943 9529 3942 9518
      3942 9517 3915 9517
TIME...MOT...LOC 0051Z 226DEG 29KT 3934 9522
HAIL 2.75IN

$$

ANGLE
191 
WWUS53 KTOP 220101
SVSTOP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TOPEKA KS
801 PM CDT SAT MAY 21 2011

KSC087-220130-
/O.CON.KTOP.TO.W.0011.000000T0000Z-110522T0130Z/
JEFFERSON-
801 PM CDT SAT MAY 21 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR EASTERN
JEFFERSON COUNTY...

AT 755 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM WITH STRONG ROTATION CAPABLE OF
PRODUCING A TORNADO.  THIS STORM WAS LOCATED NEAR OSKALOOSA...MOVING
NORTHEAST AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
MCLOUTH AND RURAL AREAS EAST AND NORTHEAST OF OSKALOOSA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR SAFETY...GO TO A STORM SHELTER OR BASEMENT NOW!

LARGE DESTRUCTIVE HAIL IS ALSO LIKELY ALONG AND NORTH OF THE EXPECTED
TORNADO TRACK.

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

&&

LAT...LON 3912 9536 3931 9541 3943 9529 3942 9518
      3942 9517 3915 9517
TIME...MOT...LOC 0100Z 240DEG 24KT 3923 9527
HAIL 2.75IN

$$

ANGLE
973 
WWUS53 KTOP 220114
SVSTOP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TOPEKA KS
814 PM CDT SAT MAY 21 2011

KSC087-220130-
/O.CON.KTOP.TO.W.0011.000000T0000Z-110522T0130Z/
JEFFERSON-
814 PM CDT SAT MAY 21 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR
NORTHEASTERN JEFFERSON COUNTY...

AT 809 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM WITH STRONG ROTATION CAPABLE OF
PRODUCING A TORNADO.  THIS STORM WAS LOCATED NEAR MCLOUTH...OR 6
MILES EAST OF OSKALOOSA...MOVING NORTHEAST AT 30 MPH.

BASEBALL SIZE HAIL WAS REPORTED NORTHEAST OF OSKALOOSA AT 810 PM.

LOCATIONS IMPACTED INCLUDE...
MAINLY RURAL AREAS OF NORTHEASTERN JEFFERSON COUNTY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR SAFETY...GO TO A STORM SHELTER OR BASEMENT NOW!

LARGE DESTRUCTIVE HAIL IS ALSO LIKELY ALONG AND NORTH OF THE EXPECTED
TORNADO TRACK.

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

&&

LAT...LON 3914 9529 3931 9530 3941 9529 3942 9518
      3942 9517 3915 9517
TIME...MOT...LOC 0113Z 242DEG 25KT 3925 9518
HAIL 2.50IN

$$

ANGLE
901 
WWUS53 KTOP 220123
SVSTOP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TOPEKA KS
823 PM CDT SAT MAY 21 2011

KSC087-220131-
/O.EXP.KTOP.TO.W.0011.000000T0000Z-110522T0130Z/
JEFFERSON-
823 PM CDT SAT MAY 21 2011

...THE TORNADO WARNING FOR EASTERN JEFFERSON COUNTY WILL EXPIRE AT
830 PM CDT...

AT 821 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED THAT THE 
STORM WHICH HAD PROMPTED THE TORNADO WARNING HAD EXITED JEFFERSON 
COUNTY INTO LEAVENWORTH COUNTY...THUS THE TORNADO WARNING HAS BEEN 
ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWEST 
JEFFERSON COUNTY UNTIL 845 PM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3914 9529 3931 9530 3941 9529 3942 9518
      3942 9517 3915 9517
TIME...MOT...LOC 0121Z 242DEG 25KT 3928 9512

$$

ANGLE

The office that day

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

IssuedProductOfficeCountiesLasted
May 21, 7:01 PM CDTSevere Thunderstorm WarningTOPPottawatomie, Wabaunsee14 min
May 21, 7:26 PM CDTSevere Thunderstorm WarningTOPJackson, Jefferson34 min
May 21, 7:28 PM CDTSevere Thunderstorm WarningTOPJackson, Jefferson32 min
May 21, 7:35 PM CDTSevere Thunderstorm WarningTOPJackson, Shawnee25 min
May 21, 7:56 PM CDTSevere Thunderstorm WarningTOPBrown, Jackson, Jefferson49 min
May 21, 8:03 PM CDTSpecial Weather StatementTOPLyon42 min
May 21, 8:20 PM CDTSevere Thunderstorm WarningTOPLyon, Morris55 min
May 21, 8:22 PM CDTRiver Flood WarningTOPOttawa, Saline30 hr
May 21, 8:30 PM CDTSevere Thunderstorm WarningTOPJackson, Jefferson45 min
May 21, 8:34 PM CDTSpecial Weather StatementTOPShawnee56 min
May 21, 8:41 PM CDTSevere Thunderstorm WarningTOPJackson, Jefferson, Shawnee33 min
May 21, 8:52 PM CDTTornado WarningTOPLyon39 min
May 21, 9:08 PM CDTTornado WarningTOPOsage52 min
May 21, 9:13 PM CDTSevere Thunderstorm WarningTOPJefferson47 min
May 21, 9:23 PM CDTTornado WarningTOPOsage52 min
May 21, 9:34 PM CDTTornado WarningTOPJefferson56 min
May 21, 9:43 PM CDTSevere Thunderstorm WarningTOPLyon32 min
May 21, 9:55 PM CDTTornado WarningTOPDouglas, Franklin65 min
May 21, 10:12 PM CDTTornado WarningTOPOsage48 min
May 21, 10:55 PM CDTSevere Thunderstorm WarningTOPCoffey, Franklin, Osage35 min
May 21, 10:57 PM CDTTornado WarningTOPDouglas, Franklin63 min
May 21, 11:13 PM CDTTornado WarningTOPCoffey, Franklin, Osage47 min
May 21, 11:58 PM CDTSevere Thunderstorm WarningTOPFranklin33 min

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.