Alert archive / Kansas / Tornado Warnings in 2011

Tornado Warning 9, NWS Kansas City, MO

May 21, 2011Miami County, Kansas

NWS Kansas City, MO issued this tornado warning at May 21, 2011, 11:29 PM CDT for Miami County, Kansas. It was in force for 31 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: May 21, 2011, 11:29 PM CDT (04:29 UTC)
Expired: May 22, 2011, 12:00 AM CDT
In force: 31 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon

County Miami County, KS

The radar

The Pleasant Hill radar (KEAX), 64 km from the middle of the area, began a volume at 04:30 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.

Issued	Product	Office	Lasted
May 21, 5:34 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 4.5 hours before the alert went out and 222 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 804 J/kg
Mixed-layer CIN: -63 J/kg
Mixed-layer LCL: 1618 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 137 m²/s²
0-3 km storm-relative helicity: 202 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 6.0

Open this sounding in Storm Lab

The text

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

377 
WFUS53 KEAX 220429
TOREAX
KSC121-220500-
/O.NEW.KEAX.TO.W.0009.110522T0429Z-110522T0500Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1129 PM CDT SAT MAY 21 2011

THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN MIAMI COUNTY IN EAST CENTRAL KANSAS...

* UNTIL MIDNIGHT CDT

* AT 1125 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED 5 MILES EAST OF OTTAWA...AND MOVING EAST AT 30
  MPH.  IN ADDITION TO A TORNADO...GOLF BALL SIZE HAIL IS EXPECTED
  WITH THIS STORM.

* LOCATIONS IMPACTED INCLUDE...
  HILLSDALE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 3870 9506 3874 9481 3860 9480 3858 9507
      3869 9507
TIME...MOT...LOC 0430Z 257DEG 26KT 3864 9513
HAIL 1.75IN

$$

MJ

2 follow-up statements

187 
WWUS53 KEAX 220452
SVSEAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1152 PM CDT SAT MAY 21 2011

KSC121-220500-
/O.CON.KEAX.TO.W.0009.000000T0000Z-110522T0500Z/
MIAMI KS-
1152 PM CDT SAT MAY 21 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTH CENTRAL MIAMI COUNTY
UNTIL MIDNIGHT CDT...

AT 1149 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 6 MILES SOUTHEAST OF EDGERTON...MOVING EAST AT 30
MPH.  IN ADDITION TO A TORNADO...PING PONG BALL SIZE HAIL IS EXPECTED
WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
  HILLSDALE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 3864 9496 3871 9498 3874 9481 3866 9480
TIME...MOT...LOC 0452Z 254DEG 28KT 3870 9490
HAIL 1.50IN

$$

MJ

517 
WWUS53 KEAX 220457
SVSEAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1157 PM CDT SAT MAY 21 2011

KSC121-220507-
/O.EXP.KEAX.TO.W.0009.000000T0000Z-110522T0500Z/
MIAMI KS-
1157 PM CDT SAT MAY 21 2011

...THE TORNADO WARNING FOR NORTH CENTRAL MIAMI COUNTY WILL EXPIRE AT
MIDNIGHT CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
HOWEVER SMALL HAIL AND GUSTY WINDS ARE STILL POSSIBLE WITH THIS 
THUNDERSTORM.

LAT...LON 3864 9496 3871 9498 3874 9481 3866 9480
TIME...MOT...LOC 0457Z 254DEG 28KT 3871 9485

$$

MJ

The office that day

Everything else NWS Kansas City, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 21, 7:34 PM CDT	Tornado Warning	EAX	Atchison, Leavenworth	41 min
May 21, 8:01 PM CDT	Severe Thunderstorm Warning	EAX	Atchison	44 min
May 21, 8:08 PM CDT	Severe Thunderstorm Warning	EAX	Atchison, Leavenworth	22 min
May 21, 8:12 PM CDT	Tornado Warning	EAX	Leavenworth	33 min
May 21, 8:34 PM CDT	Special Weather Statement	EAX	Doniphan	26 min
May 21, 8:38 PM CDT	Severe Thunderstorm Warning	EAX	Atchison, Leavenworth	37 min
May 21, 8:46 PM CDT	Severe Thunderstorm Warning	EAX	Atchison, Leavenworth	29 min
May 21, 9:13 PM CDT	Severe Thunderstorm Warning	EAX	Atchison, Leavenworth	32 min
May 21, 9:23 PM CDT	Severe Thunderstorm Warning	EAX	Atchison, Leavenworth	37 min
May 21, 9:34 PM CDT	Special Weather Statement	EAX	Atchison	26 min
May 21, 9:38 PM CDT	Areal Flood Advisory	EAX	Atchison, Doniphan, Leavenworth	4 hr
May 21, 9:44 PM CDT	Severe Thunderstorm Warning	EAX	Atchison, Leavenworth	35 min
May 21, 9:50 PM CDT	Severe Thunderstorm Warning	EAX	Leavenworth	25 min
May 21, 10:11 PM CDT	Severe Thunderstorm Warning	EAX	Atchison, Leavenworth	21 min
May 21, 10:54 PM CDT	Tornado Warning	EAX	Johnson, Miami	51 min
May 21, 11:17 PM CDT	Severe Thunderstorm Warning	EAX	Johnson, Miami	28 min
May 21, 11:41 PM CDT	Severe Thunderstorm Warning	EAX	Johnson	34 min
May 22, 1:27 AM CDT	River Flood Warning	EAX	Atchison, Leavenworth	32 hr
May 22, 4:04 AM CDT	River Flood Warning	EAX	Atchison	126 days
May 22, 3:23 PM CDT	Special Weather Statement	EAX	Linn	37 min

Nearby

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