Alert archive / Texas / Mesoscale Discussions in 2012

Mesoscale Discussion 624

April 29, 201210 counties in Kansas; 7 counties in Oklahoma; 14 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 29, 2012, 7:33 PM CDT for 10 counties in Kansas; 7 counties in Oklahoma; 14 counties in Texas. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued
Apr 29, 2012, 7:33 PM CDT (00:33 UTC)
Expired
Apr 29, 2012, 9:00 PM CDT
In force
87 min
Issued by
the Storm Prediction Center
All 31 counties

Barber County, KS, Clark County, KS, Comanche County, KS, Edwards County, KS, Ford County, KS, Harper County, KS, Kingman County, KS, Kiowa County, KS, Meade County, KS, Pratt County, KS, Alfalfa County, OK, Beaver County, OK, Ellis County, OK, Harper County, OK, Roger Mills County, OK, Woods County, OK, Woodward County, OK, Carson County, TX, Dallam County, TX, Gray County, TX, Hansford County, TX, Hartley County, TX, Hemphill County, TX, Hutchinson County, TX, Lipscomb County, TX, Moore County, TX, Ochiltree County, TX, Oldham County, TX, Potter County, TX, Roberts County, TX, Sherman County, TX

The radar

The Dodge City radar (KDDC), 140 km from the middle of the area, began a volume at 00:36 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Dodge City, (KDDC), launched 00:00Z, 0.6 hours before the alert went out and 142 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, Dodge City, at 00:00Z on 2012-04-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 439 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, Dodge City, at 00:00Z on 2012-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 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
439 J/kg
Mixed-layer CIN
-19 J/kg
Mixed-layer LCL
1738 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
62 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.5

Open this sounding in Storm Lab

The text

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

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 29, 8:04 PM CDTSevere Thunderstorm WatchSPCAllen, Bourbon, Butler, Chautauqua, Cherokee, Cowley and 14 more7 hr
Apr 29, 10:31 PM CDTMesoscale DiscussionSPCAllen, Barber, Bourbon, Chautauqua, Cherokee, Comanche and 14 more119 min
Apr 30, 2:20 AM CDTMesoscale DiscussionSPCCherokee25 min
Apr 30, 2:58 PM CDTMesoscale DiscussionSPCGrant, Haskell, Morton, Seward, Stanton, Stevens62 min
Apr 30, 3:36 PM CDTSevere Thunderstorm WatchSPCGrant, Haskell, Meade, Morton, Seward, Stanton and 1 more7 hr
Apr 30, 5:19 PM CDTMesoscale DiscussionSPCBarber, Barton, Clark, Comanche, Edwards, Finney and 15 more56 min
Apr 30, 5:42 PM CDTTornado WatchSPCBarber, Clark, Comanche, Edwards, Finney, Ford and 13 more7 hr
Apr 30, 6:55 PM CDTMesoscale DiscussionSPCAllen, Barber, Bourbon, Butler, Chautauqua, Cherokee and 22 more2 hr
Apr 30, 12:38 AM CDTMesoscale DiscussionSPCRoger Mills37 min
Apr 29, 7:23 PM CDTSevere Thunderstorm WatchSPCAndrews, Bailey, Borden, Briscoe, Castro, Cochran and 14 more4 hr
Apr 29, 8:55 PM CDTSevere Thunderstorm WatchSPCArmstrong, Carson, Collingsworth, Donley, Gray, Hemphill and 6 more6 hr
Apr 29, 10:04 PM CDTMesoscale DiscussionSPCArmstrong, Borden, Briscoe, Carson, Castro, Childress and 29 more86 min
Apr 29, 10:50 PM CDTSevere Thunderstorm WatchSPCBailey, Borden, Castro, Cochran, Dawson, Garza and 11 more4 hr
Apr 30, 2:15 AM CDTMesoscale DiscussionSPCBriscoe, Castro, Crosby, Dickens, Floyd, Garza and 5 more30 min
Apr 30, 2:08 PM CDTMesoscale DiscussionSPCCrane, Ector, Midland, Pecos, Terrell, Upton97 min
Apr 30, 2:39 PM CDTSevere Thunderstorm WatchSPCBorden, Brewster, Crane, Dawson, Ector, Howard and 12 more7 hr
Apr 30, 6:11 PM CDTMesoscale DiscussionSPCBaylor, Borden, Callahan, Coke, Coleman, Concho and 48 more2 hr
Apr 30, 6:54 PM CDTSevere Thunderstorm WatchSPCArcher, Baylor, Callahan, Coke, Coleman, Concho and 33 more6 hr

Nearby

Mesoscale Discussions in Texas, 2012Mesoscale Discussions in Kansas, 2012Mesoscale Discussions in Oklahoma, 2012Every mesoscale discussion 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.