Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 85, NWS Springfield, MO

April 29, 2012Polk County, Missouri

NWS Springfield, MO issued this severe thunderstorm warning at Apr 29, 2012, 6:47 AM CDT for Polk 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
Apr 29, 2012, 6:47 AM CDT (11:47 UTC)
Expired
Apr 29, 2012, 7:14 AM CDT
In force
27 min
Issued by
NWS Springfield, MO
Area
Storm-based polygon
Hail
1.25 in
Wind
60.0 mph

County Polk County, MO

The radar

The Springfield radar (KSGF), 56 km from the middle of the area, began a volume at 11:47 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

Springfield, MO (KSGF), launched 00:00Z, 11.8 hours before the alert went out and 100 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, Springfield, MO at 00:00Z on 2012-04-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1804 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 00:00Z on 2012-04-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 square meters per square second.19395878Sfc1 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
1804 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
927 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
184 m²/s²
Significant tornado parameter
0.9
Supercell composite
6.0

Open this sounding in Storm Lab

The text

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

867 
WUUS53 KSGF 291147
SVRSGF
MOC167-291230-
/O.NEW.KSGF.SV.W.0085.120429T1147Z-120429T1230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SPRINGFIELD MO
647 AM CDT SUN APR 29 2012

THE NATIONAL WEATHER SERVICE IN SPRINGFIELD HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN POLK COUNTY IN SOUTHWEST MISSOURI...

* UNTIL 730 AM CDT

* AT 645 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED 8 MILES WEST OF
  FAIR PLAY...AND MOVING EAST AT 35 MPH.

  HAZARD...HALF DOLLAR SIZE HAIL AND 60 MPH WIND GUSTS.

  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...
  BOLIVAR...FAIR PLAY...HUMANSVILLE...DUNNEGAN...FLEMINGTON...POLK...
  GOODSON AND HALF WAY.

THIS WARNING ALSO INCLUDES POMME DE TERRE LAKE AND STOCKTON LAKE. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3781 9342 3781 9323 3780 9319 3773 9319
      3773 9318 3755 9318 3755 9362 3774 9361
      3775 9363 3782 9363
TIME...MOT...LOC 1147Z 268DEG 30KT 3765 9369

HAIL...1.25IN
WIND...60 MPH

$$

SCHAUMANN
1 follow-up statement
104 
WWUS53 KSGF 291214
SVSSGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
714 AM CDT SUN APR 29 2012

MOC167-291224-
/O.CAN.KSGF.SV.W.0085.000000T0000Z-120429T1230Z/
POLK MO-
714 AM CDT SUN APR 29 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN POLK 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.
HOWEVER HEAVY RAIN IS STILL POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 3781 9342 3781 9323 3780 9319 3773 9319
      3773 9318 3755 9318 3755 9362 3774 9361
      3775 9363 3782 9363
TIME...MOT...LOC 1214Z 268DEG 30KT 3766 9341

$$

SCHAUMANN

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 29, 4:18 AM CDTDense Fog AdvisorySGFCamden, Dallas, Laclede, Maries, Miller, Morgan and 2 more6 hr
Apr 29, 4:59 AM CDTSevere Thunderstorm WarningSGFBarton, Vernon46 min
Apr 29, 5:08 AM CDTSevere Thunderstorm WarningSGFCedar, Dade, Hickory, Polk52 min
Apr 29, 5:25 AM CDTSevere Thunderstorm WarningSGFBarton, Cedar, St. Clair, Vernon50 min
Apr 29, 5:43 AM CDTSevere Thunderstorm WarningSGFCamden, Dallas, Hickory32 min
Apr 29, 5:58 AM CDTSevere Thunderstorm WarningSGFCedar, Dade62 min
Apr 29, 6:35 AM CDTSevere Thunderstorm WarningSGFCamden, Dallas, Hickory40 min
Apr 29, 7:20 AM CDTSpecial Weather StatementSGFDade40 min
Apr 29, 7:26 AM CDTSpecial Weather StatementSGFMiller49 min
Apr 29, 8:14 AM CDTAreal Flood AdvisorySGFBarton, Camden, Cedar, Dade, Dallas, Hickory and 1 more6 hr
Apr 29, 8:33 AM CDTFlash Flood WarningSGFCamden, Dallas, Hickory, Polk5 hr
Apr 29, 8:38 AM CDTSpecial Weather StatementSGFGreene37 min
Apr 29, 9:07 AM CDTSpecial Weather StatementSGFDallas23 min
Apr 29, 9:32 AM CDTSpecial Weather StatementSGFLaclede28 min
Apr 29, 2:53 PM CDTFlash Flood WatchSGFBarry, Barton, Benton, Camden, Cedar, Dade and 15 more40 hr

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.