Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 95, NWS Kansas City, MO

August 8, 20124 counties in Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Aug 8, 2012, 6:56 PM CDT for 4 counties in Missouri. It was in force for 34 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
Aug 8, 2012, 6:56 PM CDT (23:56 UTC)
Expired
Aug 8, 2012, 7:30 PM CDT
In force
34 min
Issued by
NWS Kansas City, MO
Area
Storm-based polygon
Hail
0.75 in
Wind
70.0 mph

Counties Andrew County, MO, Buchanan County, MO, Clinton County, MO, DeKalb County, MO

The radar

The Pleasant Hill radar (KEAX), 111 km from the middle of the area, began a volume at 23:58 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.

IssuedProductOfficeLasted
Aug 8, 4:53 PM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Topeka, KS (KFOE), launched 12:00Z, 11.9 hours before the alert went out and 113 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-pSkew-T log-p diagram, Topeka, KS at 12:00Z on 2012-08-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 597 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Topeka, KS at 12:00Z on 2012-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
597 J/kg
Mixed-layer CIN
-298 J/kg
Mixed-layer LCL
2032 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
34 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.

433 
WUUS53 KEAX 082356
SVREAX
MOC003-021-049-063-090030-
/O.NEW.KEAX.SV.W.0095.120808T2356Z-120809T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
656 PM CDT WED AUG 8 2012

THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN ANDREW COUNTY IN NORTHWEST MISSOURI...
  NORTHERN BUCHANAN COUNTY IN NORTHWEST MISSOURI...
  CLINTON COUNTY IN NORTHWEST MISSOURI...
  SOUTHERN DEKALB COUNTY IN NORTHWEST MISSOURI...

* UNTIL 730 PM CDT

* AT 654 PM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
  LINE EXTENDING FROM 7 MILES SOUTHWEST OF UNION STAR TO 6 MILES     
  SOUTHWEST OF CLARKSDALE TO AGENCY...AND MOVING SOUTHEAST AT 40     
  MPH. AT 639 PM...OFFICIAL WEATHER INSTRUMENTATION MEASURED A 63    
  MPH WIND GUST IN ST JOSEPH.

  HAZARD...70 MPH WIND GUSTS.

  SOURCE...RADAR INDICATED.

  IMPACT...TREE BRANCHES UP TO THREE INCHES IN DIAMETER BROKEN.
           POSSIBLE MINOR DAMAGE TO SHINGLE ROOFS AND METAL
           OUTBUILDINGS.

* LOCATIONS IMPACTED INCLUDE...
  GOWER...PLATTSBURG...CLARKSDALE...STEWARTSVILLE...OSBORN...AMITY
  AND TURNEY.

THIS WILL IMPACT THE FOLLOWING INTERSTATES...

  I-29 BETWEEN MILE MARKERS 39 AND 53.
  I-229 BETWEEN MILE MARKERS 0 AND 7.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3973 9491 3973 9488 3973 9487 3976 9486
      3977 9487 3982 9484 3992 9479 3987 9428
      3962 9426 3947 9441 3969 9494
TIME...MOT...LOC 2356Z 295DEG 35KT 3989 9466 3974 9459
          3960 9472

HAIL...<.75IN
WIND...70 MPH

$$

DEROCHE
2 follow-up statements
964 
WWUS53 KEAX 090008
SVSEAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
708 PM CDT WED AUG 8 2012

MOC003-021-049-063-090030-
/O.CON.KEAX.SV.W.0095.000000T0000Z-120809T0030Z/
BUCHANAN MO-CLINTON MO-DEKALB MO-ANDREW MO-
708 PM CDT WED AUG 8 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
ANDREW...SOUTHERN DEKALB...CLINTON AND NORTHEASTERN BUCHANAN COUNTIES
UNTIL 730 PM CDT...

AT 705 PM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
LINE EXTENDING FROM CLARKSDALE TO STEWARTSVILLE TO GOWER...AND MOVING
SOUTHEAST AT 40 MPH.

HAZARD...60 MPH WIND GUSTS.

SOURCE...RADAR INDICATED.

IMPACT...MINOR TREE DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER
         BROKEN.

LOCATIONS IMPACTED INCLUDE...
PLATTSBURG...OSBORN...AMITY AND TURNEY.

THIS WILL IMPACT

 I-29 BETWEEN MILE MARKERS 38 AND 42.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3975 9473 3991 9472 3987 9428 3962 9426
      3947 9441 3965 9484
TIME...MOT...LOC 0008Z 295DEG 35KT 3984 9452 3969 9445
          3955 9458

HAIL...<.75IN
WIND...60 MPH

$$

DEROCHE
267 
WWUS53 KEAX 090024
SVSEAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
724 PM CDT WED AUG 8 2012

MOC003-021-049-063-090034-
/O.EXP.KEAX.SV.W.0095.000000T0000Z-120809T0030Z/
BUCHANAN MO-CLINTON MO-DEKALB MO-ANDREW MO-
724 PM CDT WED AUG 8 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ANDREW...SOUTHERN
DEKALB...CLINTON AND NORTHEASTERN BUCHANAN COUNTIES WILL EXPIRE AT
730 PM CDT...

THE LINE OF STORMS 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 1AM.

LAT...LON 3975 9473 3991 9472 3987 9428 3962 9426
      3947 9441 3965 9484
TIME...MOT...LOC 0024Z 295DEG 35KT 3977 9434 3962 9427
          3948 9440

$$

DEROCHE

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 8, 6:09 PM CDTSevere Thunderstorm WarningEAXAndrew, Holt36 min
Aug 8, 6:18 PM CDTSevere Thunderstorm WarningEAXBuchanan, Platte27 min
Aug 8, 6:36 PM CDTSevere Thunderstorm WarningEAXAndrew, Buchanan24 min
Aug 8, 6:45 PM CDTSevere Thunderstorm WarningEAXBuchanan, Platte30 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2012Every 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.