Alert archive / Texas / Mesoscale Discussions in 2006

Mesoscale Discussion 579

April 20, 200632 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 20, 2006, 10:15 AM CDT for 32 counties in Texas. It was in force for 60 min.

The area

The outline as issued.

The facts

Issued
Apr 20, 2006, 10:15 AM CDT (15:15 UTC)
Expired
Apr 20, 2006, 11:15 AM CDT
In force
60 min
Issued by
the Storm Prediction Center
All 32 counties

Borden County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Crane County, TX, Crockett County, TX, Edwards County, TX, Fisher County, TX, Glasscock County, TX, Howard County, TX, Irion County, TX, Jones County, TX, Kimble County, TX, Martin County, TX, Menard County, TX, Midland County, TX, Mitchell County, TX, Nolan County, TX, Reagan County, TX, Real County, TX, Runnels County, TX, Schleicher County, TX, Scurry County, TX, Shackelford County, TX, Sterling County, TX, Stonewall County, TX, Sutton County, TX, Taylor County, TX, Tom Green County, TX, Upton County, TX, Val Verde County, TX

The radar

The San Angelo radar (KSJT), 13 km from the middle of the area, began a volume at 15:18 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

Del Rio, TX (KDRT), launched 12:00Z, 3.3 hours before the alert went out and 226 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, Del Rio, TX at 12:00Z on 2006-04-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1378 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, Del Rio, TX at 12:00Z on 2006-04-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 82 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
1378 J/kg
Mixed-layer CIN
-155 J/kg
Mixed-layer LCL
702 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
82 m²/s²
0-3 km storm-relative helicity
143 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

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 19, 7:31 PM CDTMesoscale DiscussionSPCDimmit, Frio, La Salle, Webb, Zavala119 min
Apr 19, 7:41 PM CDTMesoscale DiscussionSPCAngelina, Camp, Cass, Cherokee, Gregg, Harrison and 11 more94 min
Apr 19, 8:30 PM CDTMesoscale DiscussionSPCBorden, Bosque, Brown, Callahan, Coke, Coleman and 37 more60 min
Apr 19, 8:55 PM CDTSevere Thunderstorm WatchSPCArcher, Bosque, Brown, Callahan, Clay, Coke and 33 more6 hr
Apr 19, 9:23 PM CDTSevere Thunderstorm WatchSPCAnderson, Bell, Bowie, Camp, Cass, Cherokee and 35 more5 hr
Apr 20, 1:49 AM CDTSevere Thunderstorm WatchSPCAnderson, Bell, Bowie, Camp, Cass, Cherokee and 35 more7 hr
Apr 20, 2:43 AM CDTMesoscale DiscussionSPCBorden, Callahan, Dawson, Eastland, Fisher, Glasscock and 11 more62 min
Apr 20, 2:53 AM CDTSevere Thunderstorm WatchSPCDimmit, Edwards, Kinney, Maverick, Real, Uvalde and 2 more3 hr
Apr 20, 3:13 AM CDTSevere Thunderstorm WatchSPCAndrews, Borden, Brown, Callahan, Coke, Coleman and 26 more8 hr
Apr 20, 4:55 AM CDTMesoscale DiscussionSPCDimmit, Edwards, Kinney, Maverick, Real, Uvalde and 1 more65 min
Apr 20, 9:30 AM CDTSevere Thunderstorm WatchSPCBandera, Brown, Coke, Coleman, Concho, Crockett and 24 more7 hr
Apr 20, 11:18 AM CDTSevere Thunderstorm WatchSPCBastrop, Bexar, Blanco, Burnet, Caldwell, Comal and 9 more4 hr
Apr 20, 1:21 PM CDTMesoscale DiscussionSPCAnderson, Bell, Blanco, Borden, Bosque, Brown and 79 more84 min
Apr 20, 2:58 PM CDTMesoscale DiscussionSPCBandera, Blanco, Burnet, Comal, Crockett, Edwards and 16 more62 min
Apr 20, 3:24 PM CDTTornado WatchSPCBandera, Bastrop, Bexar, Blanco, Brazos, Burleson and 34 more7 hr
Apr 20, 3:31 PM CDTSevere Thunderstorm WatchSPCBell, Bosque, Brown, Callahan, Coke, Coleman and 20 more6 hr
Apr 20, 3:54 PM CDTMesoscale DiscussionSPCLoving, Ward, Winkler66 min
Apr 20, 4:37 PM CDTTornado WatchSPCAndrews, Crane, Dawson, Ector, Gaines, Glasscock and 10 more4 hr
Apr 20, 5:54 PM CDTMesoscale DiscussionSPCAustin, Bastrop, Brazos, Burleson, Caldwell, Colorado and 11 more96 min
Apr 20, 6:34 PM CDTSevere Thunderstorm WatchSPCAnderson, Angelina, Cherokee, Ellis, Gregg, Grimes and 29 more6 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.