Alert archive / Texas / Mesoscale Discussions in 2006

Mesoscale Discussion 682

April 28, 200623 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 28, 2006, 3:38 PM CDT for 23 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Apr 28, 2006, 3:38 PM CDT (20:38 UTC)
Expired
Apr 28, 2006, 5:45 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 23 counties

Childress County, TX, Coke County, TX, Cottle County, TX, Dickens County, TX, Fisher County, TX, Foard County, TX, Glasscock County, TX, Hardeman County, TX, Haskell County, TX, Howard County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Mitchell County, TX, Motley County, TX, Nolan County, TX, Runnels County, TX, Scurry County, TX, Sterling County, TX, Stonewall County, TX, Taylor County, TX, Wilbarger County, TX

The radar

The Dyess AFB radar (KDYX), 127 km from the middle of the area, began a volume at 20:38 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

Midland Regional, TX (KMAF), launched 12:00Z, 8.6 hours before the alert went out and 189 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, Midland Regional, TX at 12:00Z on 2006-04-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1582 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, Midland Regional, TX at 12:00Z on 2006-04-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 117 square meters per square second.1939587897117136Sfc1 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
1582 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
625 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
117 m²/s²
0-3 km storm-relative helicity
138 m²/s²
Significant tornado parameter
0.8
Supercell composite
4.3

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 28, 7:03 AM CDTMesoscale DiscussionSPCDallam, Hansford, Hartley, Hutchinson, Lipscomb, Moore and 3 more117 min
Apr 28, 10:23 AM CDTMesoscale DiscussionSPCChildress, Collingsworth, Cottle, Donley, Foard, Gray and 8 more97 min
Apr 28, 10:43 AM CDTMesoscale DiscussionSPCBorden, Crosby, Dawson, Garza, Glasscock, Howard and 8 more92 min
Apr 28, 11:36 AM CDTTornado WatchSPCArcher, Baylor, Borden, Brown, Callahan, Childress and 39 more9 hr
Apr 28, 1:04 PM CDTMesoscale DiscussionSPCBosque, Brown, Callahan, Clay, Coleman, Collin and 33 more86 min
Apr 28, 1:13 PM CDTMesoscale DiscussionSPCBandera, Crockett, Edwards, Gillespie, Kerr, Kimble and 10 more62 min
Apr 28, 1:20 PM CDTMesoscale DiscussionSPCBriscoe, Cottle, Dickens, Floyd, Foard, Hall and 7 more85 min
Apr 28, 1:28 PM CDTTornado WatchSPCBandera, Blanco, Crockett, Edwards, Gillespie, Kendall and 13 more6 hr
Apr 28, 3:42 PM CDTMesoscale DiscussionSPCBandera, Crockett, Edwards, Gillespie, Kendall, Kerr and 11 more2 hr
Apr 28, 6:07 PM CDTMesoscale DiscussionSPCArcher, Baylor, Childress, Clay, Cooke, Cottle and 15 more53 min
Apr 28, 6:18 PM CDTMesoscale DiscussionSPCBell, Bosque, Brazos, Brown, Burnet, Callahan and 42 more87 min
Apr 28, 6:42 PM CDTTornado WatchSPCArcher, Baylor, Bell, Bosque, Brown, Callahan and 48 more7 hr

Nearby

Mesoscale Discussions in Texas, 2006Every mesoscale discussion in 2006

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.