Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 9, NWS Kansas City, MO

February 29, 2012Macon County, Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Feb 29, 2012, 12:03 AM CST for Macon County, Missouri. It was in force for 12 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 29, 2012, 12:03 AM CST (06:03 UTC)
Expired: Feb 29, 2012, 12:15 AM CST
In force: 12 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Macon County, MO

The radar

The Pleasant Hill radar (KEAX), 196 km from the middle of the area, began a volume at 06:02 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 nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 6.1 hours before the alert went out and 255 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1189 m above ground
0-6 km bulk shear: 77 kt
0-1 km storm-relative helicity: 424 m²/s²
0-3 km storm-relative helicity: 528 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

310 
WUUS53 KEAX 290603
SVREAX
MOC121-290615-
/O.NEW.KEAX.SV.W.0009.120229T0603Z-120229T0615Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1203 AM CST WED FEB 29 2012

THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN MACON COUNTY IN NORTH CENTRAL MISSOURI...

* UNTIL 1215 AM CST

* AT 1157 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM 6 MILES SOUTHWEST OF LA PLATA TO CALLAO TO 9 MILES SOUTH OF
  MARCELINE...AND MOVING EAST AT 70 MPH. PENNY SIZE HAIL MAY ALSO
  ACCOMPANY THESE DAMAGING WINDS.

  AT 1136 A WIND GUST OF ALL MOST 60 MPH WAS REPORTED NEAR LINNEUS   
  WITH THESE STORMS.

* LOCATIONS IMPACTED INCLUDE...
  MACON...ATLANTA AND BEVIER.

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 3968 9230 3967 9268 3977 9259 4004 9257
      4004 9235 3995 9234 3995 9228
TIME...MOT...LOC 0602Z 252DEG 59KT 3999 9247 3982 9255
          3961 9280
WIND...HAIL 60MPH 0.75IN

$$

CUTTER

1 follow-up statement

130 
WWUS53 KEAX 290616
SVSEAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1216 AM CST WED FEB 29 2012

MOC121-290626-
/O.EXP.KEAX.SV.W.0009.000000T0000Z-120229T0615Z/
MACON MO-
1216 AM CST WED FEB 29 2012

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN MACON COUNTY HAS
EXPIRED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY.  HOWEVER HEAVY RAIN IS STILL POSSIBLE WITH THESE
THUNDERSTORMS.

IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 3 AM.

LAT...LON 3968 9230 3967 9268 3977 9259 4004 9257
      4004 9235 3995 9234 3995 9228
TIME...MOT...LOC 0603Z 252DEG 59KT 3999 9245 3982 9253
          3961 9278

$$

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, 11:31 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, 12:19 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.