Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 83, NWS Kansas City, MO

July 8, 2012DeKalb County, Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Jul 8, 2012, 12:03 AM CDT for DeKalb County, Missouri. It was in force for 27 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: Jul 8, 2012, 12:03 AM CDT (05:03 UTC)
Expired: Jul 8, 2012, 12:30 AM CDT
In force: 27 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

County DeKalb County, MO

The radar

The Pleasant Hill radar (KEAX), 131 km from the middle of the area, began a volume at 05:06 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

Topeka, KS (KTOP), launched 00:00Z, 5.1 hours before the alert went out and 150 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: 205 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 3326 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -17 m²/s²
0-3 km storm-relative helicity: -30 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.

175 
WUUS53 KEAX 080503
SVREAX
MOC063-080530-
/O.NEW.KEAX.SV.W.0083.120708T0503Z-120708T0530Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1203 AM CDT SUN JUL 8 2012

THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN DEKALB COUNTY IN NORTHWEST MISSOURI...

* UNTIL 1230 AM CDT

* AT 1201 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED 6 MILES
  NORTHWEST OF MAYSVILLE...AND MOVING NORTH AT 5 MPH.

  HAZARD...60 MPH WIND GUSTS AND NICKEL SIZE HAIL.

  SOURCE...RADAR INDICATED.

  IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. MINOR TREE
           DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER BROKEN.

* LOCATIONS IMPACTED INCLUDE...
  FAIRPORT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4004 9455 4004 9432 3990 9427 3987 9450
TIME...MOT...LOC 0503Z 167DEG 3KT 3997 9441

HAIL...0.88IN
WIND...60 MPH

$$

CDB

2 follow-up statements

900 
WWUS53 KEAX 080520
SVSEAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1220 AM CDT SUN JUL 8 2012

MOC063-080530-
/O.CON.KEAX.SV.W.0083.000000T0000Z-120708T0530Z/
DEKALB MO-
1220 AM CDT SUN JUL 8 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
DEKALB COUNTY UNTIL 1230 AM CDT...

AT 1216 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED 7 MILES NORTHWEST 
OF MAYSVILLE...AND MOVING NORTH AT 5 MPH. THUNDERSTORM WINDS WERE 
MOVING AHEAD OF THE STORM ACROSS NORTHERN DEKALB COUNTY AND MAY 
PRODUCE 55 TO 60 MPH WINDS.

HAZARD...60 MPH WIND GUSTS AND NICKEL SIZE HAIL.

SOURCE...RADAR INDICATED.

IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. MINOR TREE
         DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER BROKEN.

LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF NORTHERN DEKALB COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4004 9455 4004 9432 3990 9427 3987 9450
TIME...MOT...LOC 0519Z 167DEG 3KT 3998 9441

HAIL...0.88IN
WIND...60 MPH

$$

CDB

125 
WWUS53 KEAX 080528
SVSEAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1228 AM CDT SUN JUL 8 2012

MOC063-080538-
/O.EXP.KEAX.SV.W.0083.000000T0000Z-120708T0530Z/
DEKALB MO-
1228 AM CDT SUN JUL 8 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN DEKALB COUNTY WILL
EXPIRE AT 1230 AM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
HOWEVER GUSTY WINDS TO 50 MPH ARE STILL POSSIBLE WITH THIS 
THUNDERSTORM AS WELL AS FREQUENT CLOUD TO GROUND LIGHTNING STRIKES.

LAT...LON 4004 9455 4004 9432 3990 9427 3987 9450
TIME...MOT...LOC 0528Z 167DEG 3KT 3999 9441

$$

CDB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 7:24 PM CDT	Special Weather Statement	EAX	Linn	36 min
Jul 7, 9:54 PM CDT	Special Weather Statement	EAX	Randolph	51 min
Jul 7, 11:15 PM CDT	Special Weather Statement	EAX	Andrew	15 min
Jul 7, 11:23 PM CDT	Special Weather Statement	EAX	Andrew	22 min
Jul 7, 11:25 PM CDT	Special Weather Statement	EAX	DeKalb	20 min
Jul 7, 11:46 PM CDT	Special Weather Statement	EAX	DeKalb	29 min
Jul 8, 12:17 AM CDT	Special Weather Statement	EAX	Gentry	28 min
Jul 8, 12:30 AM CDT	Special Weather Statement	EAX	DeKalb	30 min
Jul 8, 3:23 AM CDT	Heat Advisory	EAX	Bates, Cooper, Henry, Howard, Pettis	16 hr
Jul 8, 10:52 AM CDT	Areal Flood Advisory	EAX	Linn, Livingston	6 hr
Jul 8, 1:25 PM CDT	Special Weather Statement	EAX	Henry	50 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.