Alert archive / Texas / Mesoscale Discussions in 2006

Mesoscale Discussion 2107

October 12, 20064 parishes in Louisiana; 56 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Oct 12, 2006, 6:08 PM CDT for 4 parishes in Louisiana; 56 counties in Texas. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued
Oct 12, 2006, 6:08 PM CDT (23:08 UTC)
Expired
Oct 12, 2006, 7:15 PM CDT
In force
67 min
Issued by
the Storm Prediction Center
All 60 counties

Beauregard Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, Vernon Parish, LA, Angelina County, TX, Aransas County, TX, Austin County, TX, Bastrop County, TX, Bee County, TX, Blanco County, TX, Brazoria County, TX, Brazos County, TX, Burleson County, TX, Caldwell County, TX, Calhoun County, TX, Chambers County, TX, Colorado County, TX, Comal County, TX, DeWitt County, TX, Fayette County, TX, Fort Bend County, TX, Galveston County, TX, Goliad County, TX, Gonzales County, TX, Grimes County, TX, Guadalupe County, TX, Hardin County, TX, Harris County, TX, Hays County, TX, Jackson County, TX, Jasper County, TX, Jefferson County, TX, Jim Wells County, TX, Karnes County, TX, Lavaca County, TX, Lee County, TX, Liberty County, TX, Live Oak County, TX, Madison County, TX, Matagorda County, TX, Milam County, TX, Montgomery County, TX, Newton County, TX, Nueces County, TX, Orange County, TX, Polk County, TX, Refugio County, TX, Sabine County, TX, San Jacinto County, TX, San Patricio County, TX, Travis County, TX, Trinity County, TX, Tyler County, TX, Victoria County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wharton County, TX, Williamson County, TX, Wilson County, TX

The radar

The Houston radar (KHGX), 124 km from the middle of the area, began a volume at 23:07 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

Corpus Christi, TX (KCRP), launched 12:00Z, 11.1 hours before the alert went out and 185 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, Corpus Christi, TX at 12:00Z on 2006-10-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2634 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, Corpus Christi, TX at 12:00Z on 2006-10-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 80 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
2634 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
565 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
80 m²/s²
0-3 km storm-relative helicity
119 m²/s²
Significant tornado parameter
1.3
Supercell composite
8.4

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
Oct 12, 3:30 PM CDTMesoscale DiscussionSPCCameron90 min
Oct 12, 11:38 AM CDTMesoscale DiscussionSPCAngelina, Austin, Bastrop, Bell, Blanco, Brazoria and 43 more3 hr
Oct 12, 1:20 PM CDTSevere Thunderstorm WatchSPCAransas, Austin, Bastrop, Brazoria, Brazos, Burleson and 32 more8 hr

Nearby

Mesoscale Discussions in Texas, 2006Mesoscale Discussions in Louisiana, 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.