Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 6, NWS Kansas City, MO

February 28, 20124 counties in Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Feb 28, 2012, 10:55 PM CST for 4 counties in Missouri. 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: Feb 28, 2012, 10:55 PM CST (04:55 UTC)
Expired: Feb 28, 2012, 11:21 PM CST
In force: 26 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

Counties Clay County, MO, Jackson County, MO, Lafayette County, MO, Ray County, MO

The radar

The Pleasant Hill radar (KEAX), 56 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.

Issued	Product	Office	Lasted
Feb 28, 10:07 PM CST	Severe Thunderstorm Watch	SPC	3 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 4.9 hours before the alert went out and 132 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: 37 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 482 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: 427 m²/s²
0-3 km storm-relative helicity: 451 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

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

023 
WUUS53 KEAX 290455
SVREAX
MOC047-095-107-177-290530-
/O.NEW.KEAX.SV.W.0006.120229T0455Z-120229T0530Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1055 PM CST TUE FEB 28 2012

THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN CLAY COUNTY IN WEST CENTRAL MISSOURI...
  NORTHERN JACKSON COUNTY IN WEST CENTRAL MISSOURI...
  NORTHWESTERN LAFAYETTE COUNTY IN WEST CENTRAL MISSOURI...
  RAY COUNTY IN WEST CENTRAL MISSOURI...

* UNTIL 1130 PM CST

* AT 1052 PM CST...LOCAL LAW ENFORCEMENT REPORTED A SEVERE
  THUNDERSTORM PRODUCING DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THIS
  STORM WAS LOCATED NEAR COURTNEY...AND MOVING NORTHEAST AT 60 MPH.

  AT 1045 PM 60 MPH WIND WAS REPORTED IN RIVER MARKET WITH THIS      
  STORM.

* LOCATIONS IMPACTED INCLUDE...
  BUCKNER...EXCELSIOR SPRINGS...LAWSON...RICHMOND...MISSOURI CITY...
  SIBLEY...LEVASY...ORRICK...CRYSTAL LAKES...EXCELSIOR ESTATES...
  WOODS HEIGHTS...WELLINGTON...HENRIETTA...MOSBY...PRATHERSVILLE...
  NAPOLEON...HOMESTEAD...FLEMING...CAMDEN AND RAYVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 3925 9447 3948 9416 3952 9376 3950 9376
      3908 9400 3905 9448
TIME...MOT...LOC 0454Z 240DEG 51KT 3918 9437
WIND...HAIL 70MPH <.75IN

$$

CUTTER

2 follow-up statements

011 
WWUS53 KEAX 290507
SVSEAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1107 PM CST TUE FEB 28 2012

MOC047-095-107-290517-
/O.CAN.KEAX.SV.W.0006.000000T0000Z-120229T0530Z/
CLAY MO-JACKSON MO-LAFAYETTE MO-
1107 PM CST TUE FEB 28 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN LAFAYETTE...
NORTHERN JACKSON AND SOUTHEASTERN CLAY COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED ACROSS ACROSS THE 
WARNED AREA.

LAT...LON 3952 9376 3950 9376 3918 9395 3918 9396
      3921 9398 3919 9404 3917 9403 3915 9411
      3917 9414 3918 9418 3919 9419 3921 9417
      3921 9420 3944 9421 3948 9416
TIME...MOT...LOC 0507Z 240DEG 51KT 3927 9416

$$

MOC177-290530-
/O.CON.KEAX.SV.W.0006.000000T0000Z-120229T0530Z/
RAY MO-
1107 PM CST TUE FEB 28 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR RAY COUNTY
UNTIL 1130 PM CST...

AT 1101 PM CST...LOCAL LAW ENFORCEMENT REPORTED A SEVERE THUNDERSTORM
PRODUCING DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THIS STORM WAS
LOCATED NEAR MISSOURI CITY...OR 7 MILES NORTHWEST OF BUCKNER...MOVING
NORTHEAST AT 60 MPH.

LOCATIONS IMPACTED INCLUDE...
  RICHMOND...CRYSTAL LAKES...WOODS HEIGHTS...HENRIETTA...HOMESTEAD...
  FLEMING...CAMDEN...RAYVILLE...KNOXVILLE AND RUSSELLVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 3952 9376 3950 9376 3918 9395 3918 9396
      3921 9398 3919 9404 3917 9403 3915 9411
      3917 9414 3918 9418 3919 9419 3921 9417
      3921 9420 3944 9421 3948 9416
TIME...MOT...LOC 0507Z 240DEG 51KT 3927 9416
WIND...HAIL 70MPH <.75IN

$$

CUTTER

374 
WWUS53 KEAX 290521
SVSEAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1121 PM CST TUE FEB 28 2012

MOC177-290530-
/O.CAN.KEAX.SV.W.0006.000000T0000Z-120229T0530Z/
RAY MO-
1121 PM CST TUE FEB 28 2012

...THE SEVERE THUNDERSTORM WARNING FOR RAY COUNTY IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 3 AM. 

LAT...LON 3952 9376 3950 9376 3918 9395 3918 9396
      3921 9398 3919 9404 3917 9403 3915 9411
      3917 9414 3918 9418 3919 9419 3921 9417
      3921 9420 3944 9421 3948 9416
TIME...MOT...LOC 0520Z 240DEG 51KT 3936 9395

$$

CUTTER

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 28, 9:44 PM CST	Severe Thunderstorm Warning	EAX	Platte	31 min
Feb 28, 9:47 PM CST	Severe Thunderstorm Warning	EAX	Buchanan, Clay, Clinton, Platte	28 min
Feb 28, 10:16 PM CST	Severe Thunderstorm Warning	EAX	Clay, Jackson, Platte	29 min
Feb 28, 10:30 PM CST	Severe Thunderstorm Warning	EAX	Clay, Jackson, Platte	30 min
Feb 28, 10:34 PM CST	Special Weather Statement	EAX	Cass	26 min
Feb 28, 10:37 PM CST	Special Weather Statement	EAX	Bates	23 min
Feb 28, 11:02 PM CST	Special Weather Statement	EAX	Cass	28 min
Feb 28, 11:02 PM CST	Severe Thunderstorm Warning	EAX	Caldwell, Carroll, Chariton, Linn, Livingston	28 min
Feb 28, 11:04 PM CST	Special Weather Statement	EAX	Bates, Henry	26 min
Feb 28, 11:13 PM CST	Special Weather Statement	EAX	Carroll, Chariton	32 min
Feb 28, 11:31 PM CST	Severe Thunderstorm Warning	EAX	Carroll, Chariton, Linn, Macon	29 min
Feb 28, 11:35 PM CST	Special Weather Statement	EAX	Henry	25 min
Feb 29, 12:03 AM CST	Severe Thunderstorm Warning	EAX	Macon	12 min
Feb 29, 12:19 AM CST	Special Weather Statement	EAX	Macon	41 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2012 Every severe thunderstorm warning in 2012

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.