Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 8, NWS Kansas City, MO

February 28, 20124 counties in Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Feb 28, 2012, 11:31 PM CST for 4 counties in Missouri. It was in force for 29 min. 1 report 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: Feb 28, 2012, 11:31 PM CST (05:31 UTC)
Expired: Feb 29, 2012, 12:00 AM CST
In force: 29 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Carroll County, MO, Chariton County, MO, Linn County, MO, Macon County, MO

The radar

The Pleasant Hill radar (KEAX), 139 km from the middle of the area, began a volume at 05:31 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

Time	Report	Where	Remark
Feb 28, 11:36 PM CST	TSTM WND GST 58	2 Se Linneus, MO

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.

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, 5.5 hours before the alert went out and 230 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.

520 
WUUS53 KEAX 290531
SVREAX
MOC033-041-115-121-290600-
/O.NEW.KEAX.SV.W.0008.120229T0531Z-120229T0600Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1131 PM CST TUE FEB 28 2012

THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN CARROLL COUNTY IN NORTH CENTRAL MISSOURI...
  NORTHERN CHARITON COUNTY IN NORTH CENTRAL MISSOURI...
  LINN COUNTY IN NORTH CENTRAL MISSOURI...
  WESTERN MACON COUNTY IN NORTH CENTRAL MISSOURI...

* UNTIL MIDNIGHT CST

* AT 1126 PM CST...TRAINED WEATHER SPOTTERS REPORTED A LINE OF SEVERE
  THUNDERSTORMS PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE
  STORMS WERE LOCATED ALONG A LINE EXTENDING FROM LINNEUS TO 6 MILES
  NORTHEAST OF HALE TO 6 MILES NORTH OF CARROLLTON...AND MOVING EAST
  AT 50 MPH. PENNY SIZE HAIL MAY ALSO ACCOMPANY THESE DAMAGING WINDS.

  AT 1113 PM A 60 MPH WIND WAS REPORTED IN CHILLICOTHE WITH THIS     
  STORM.

* LOCATIONS IMPACTED INCLUDE...
  BROOKFIELD...MARCELINE...BOSWORTH...BUCKLIN...CALLAO...MENDON...
  ROTHVILLE...SAINT CATHERINE...TRIPLETT...NEW BOSTON...NEW
  CAMBRIA...ETHEL...WIEN...ELMER AND SOUTH GIFFORD.

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 3977 9258 3949 9288 3937 9361 3962 9335
      3962 9326 3965 9329 3965 9328 3969 9328
      3970 9327 3971 9330 3993 9328 4004 9256
TIME...MOT...LOC 0531Z 257DEG 44KT 3986 9317 3967 9319
          3946 9341
WIND...HAIL 60MPH 0.75IN

$$

CUTTER

2 follow-up statements

793 
WWUS53 KEAX 290549
SVSEAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1149 PM CST TUE FEB 28 2012

MOC033-290556-
/O.CAN.KEAX.SV.W.0008.000000T0000Z-120229T0600Z/
CARROLL MO-
1149 PM CST TUE FEB 28 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CARROLL COUNTY IS
CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED ACROSS 
AND MOVED OUT OF THE WARNED AREA.

LAT...LON 3977 9258 3949 9288 3946 9322 3962 9326
      3986 9306 3998 9299 4004 9256
TIME...MOT...LOC 0546Z 252DEG 59KT 3991 9280 3974 9288
          3953 9313

$$

MOC041-115-121-290600-
/O.CON.KEAX.SV.W.0008.000000T0000Z-120229T0600Z/
CHARITON MO-LINN MO-MACON MO-
1149 PM CST TUE FEB 28 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN
MACON...EASTERN LINN AND NORTHERN CHARITON COUNTIES IN NORTH CENTRAL
MISSOURI UNTIL MIDNIGHT CST...

AT 1143 PM CST...TRAINED WEATHER SPOTTERS REPORTED A LINE OF SEVERE
THUNDERSTORMS PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE
STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 8 MILES NORTH OF
BUCKLIN TO MARCELINE TO 7 MILES NORTHWEST OF BRUNSWICK...MOVING EAST
AT 70 MPH. PENNY SIZE HAIL MAY ALSO ACCOMPANY THESE DAMAGING WINDS.

AT 1041 PM A 55 MPH WIND OCCURRED IN THE CITY OF BROOKFIELD. 

LOCATIONS IMPACTED INCLUDE...
  CALLAO...ETHEL...NEW CAMBRIA...ELMER AND WIEN.

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 3977 9258 3949 9288 3946 9322 3962 9326
      3986 9306 3998 9299 4004 9256
TIME...MOT...LOC 0546Z 252DEG 59KT 3991 9280 3974 9288
          3953 9313
WIND...HAIL 60MPH 0.75IN

$$

CUTTER

526 
WWUS53 KEAX 290606
SVSEAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1206 AM CST WED FEB 29 2012

MOC041-115-121-290615-
/O.EXP.KEAX.SV.W.0008.000000T0000Z-120229T0600Z/
CHARITON MO-LINN MO-MACON MO-
1206 AM CST WED FEB 29 2012

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN MACON...EASTERN LINN
AND NORTHERN CHARITON COUNTIES IN NORTH CENTRAL MISSOURI HAS
EXPIRED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE
WARNED AREA.

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

REMEMBER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR 
EASTERN HALF OF MACON COUNTY UNTIL 1215 AM.

LAT...LON 3977 9258 3949 9288 3946 9322 3962 9326
      3986 9306 3998 9299 4004 9256
TIME...MOT...LOC 0549Z 252DEG 59KT 3992 9274 3975 9282
          3954 9307

$$

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, 10:55 PM CST	Severe Thunderstorm Warning	EAX	Clay, Jackson, Lafayette, Ray	26 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, 11:35 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.