Alert archive / Texas / Mesoscale Discussions in 2006

Mesoscale Discussion 309

March 18, 200634 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 18, 2006, 10:15 PM CST for 34 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Mar 18, 2006, 10:15 PM CST (04:15 UTC)
Expired
Mar 19, 2006, 12:15 AM CST
In force
2 hr
Issued by
the Storm Prediction Center
All 34 counties

Bell County, TX, Blanco County, TX, Bosque County, TX, Brown County, TX, Burnet County, TX, Callahan County, TX, Coleman County, TX, Comal County, TX, Comanche County, TX, Coryell County, TX, Eastland County, TX, Erath County, TX, Gillespie County, TX, Hamilton County, TX, Hays County, TX, Hill County, TX, Hood County, TX, Jack County, TX, Johnson County, TX, Kendall County, TX, Lampasas County, TX, Llano County, TX, Mills County, TX, Palo Pinto County, TX, Parker County, TX, San Saba County, TX, Shackelford County, TX, Somervell County, TX, Stephens County, TX, Tarrant County, TX, Throckmorton County, TX, Travis County, TX, Williamson County, TX, Young County, TX

The radar

The Ft Hood radar (KGRK), 137 km from the middle of the area, began a volume at 04:15 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

Del Rio, TX (KDRT), launched 00:00Z, 4.3 hours before the alert went out and 320 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 00:00Z on 2006-03-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1296 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 00:00Z on 2006-03-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 81 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
1296 J/kg
Mixed-layer CIN
-102 J/kg
Mixed-layer LCL
1421 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
81 m²/s²
0-3 km storm-relative helicity
239 m²/s²
Significant tornado parameter
0.8
Supercell composite
7.1

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
Mar 18, 7:13 PM CSTSevere Thunderstorm WatchSPCAndrews, Bandera, Borden, Callahan, Coke, Coleman and 42 more7 hr
Mar 18, 8:58 PM CSTMesoscale DiscussionSPCBandera, Borden, Brown, Callahan, Coke, Coleman and 34 more2 hr
Mar 18, 11:30 PM CSTMesoscale DiscussionSPCBandera, Brown, Callahan, Coleman, Concho, Crockett and 15 more90 min
Mar 19, 1:23 AM CSTMesoscale DiscussionSPCBandera, Bexar, Blanco, Burnet, Comal, Crockett and 18 more37 min
Mar 19, 2:05 AM CSTTornado WatchSPCBlanco, Burnet, Concho, Edwards, Gillespie, Kerr and 9 more6 hr
Mar 19, 4:47 AM CSTMesoscale DiscussionSPCBell, Blanco, Burnet, Concho, Edwards, Gillespie and 13 more88 min
Mar 19, 7:55 AM CSTMesoscale DiscussionSPCBandera, Bell, Blanco, Bosque, Brown, Burnet and 43 more35 min
Mar 19, 8:01 AM CSTSevere Thunderstorm WatchSPCBlanco, Burnet, Gillespie, Llano, Travis, Williamson2 hr
Mar 19, 10:12 AM CSTMesoscale DiscussionSPCAnderson, Bell, Bosque, Brown, Burnet, Camp and 42 more93 min
Mar 19, 12:15 PM CSTMesoscale DiscussionSPCCallahan, Coke, Coleman, Concho, Crockett, Glasscock and 13 more2 hr
Mar 19, 3:02 PM CSTMesoscale DiscussionSPCBandera, Bell, Blanco, Burnet, Comal, Coryell and 20 more118 min
Mar 19, 3:38 PM CSTTornado WatchSPCBandera, Brown, Coke, Coleman, Concho, Crockett and 20 more5 hr
Mar 19, 5:36 PM CSTMesoscale DiscussionSPCBandera, Brown, Concho, Edwards, Gillespie, Irion and 16 more114 min
Mar 19, 5:51 PM CSTMesoscale DiscussionSPCAndrews, Bailey, Cochran, Deaf Smith, Ector, Gaines and 8 more54 min

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.