Alert archive / Texas / Mesoscale Discussions in 2012

Mesoscale Discussion 2051

October 13, 201233 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Oct 13, 2012, 6:30 PM CDT for 33 counties in Texas. It was in force for 60 min.

The area

The outline as issued.

The facts

Issued
Oct 13, 2012, 6:30 PM CDT (23:30 UTC)
Expired
Oct 13, 2012, 7:30 PM CDT
In force
60 min
Issued by
the Storm Prediction Center
Chance of a watch
20%
All 33 counties

Angelina County, TX, Austin County, TX, Bastrop County, TX, Bexar County, TX, Brazos County, TX, Burleson County, TX, Caldwell County, TX, Colorado County, TX, Comal County, TX, Fayette County, TX, Fort Bend County, TX, Gonzales County, TX, Grimes County, TX, Guadalupe County, TX, Harris County, TX, Hays County, TX, Houston County, TX, Lavaca County, TX, Lee County, TX, Leon County, TX, Madison County, TX, Medina County, TX, Milam County, TX, Montgomery County, TX, Polk County, TX, Robertson County, TX, San Jacinto County, TX, Travis County, TX, Trinity County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Williamson County, TX

The radar

The Ft Hood radar (KGRK), 90 km from the middle of the area, began a volume at 23:32 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

Fort Worth, TX (KFWD), launched 12:00Z, 11.5 hours before the alert went out and 288 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, Fort Worth, TX at 12:00Z on 2012-10-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 184 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, Fort Worth, TX at 12:00Z on 2012-10-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 202 square meters per square second.193958Sfc1 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
184 J/kg
Mixed-layer CIN
-330 J/kg
Mixed-layer LCL
732 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
202 m²/s²
0-3 km storm-relative helicity
187 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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, 9:19 PM CDTMesoscale DiscussionSPCArmstrong, Bailey, Briscoe, Carson, Castro, Cochran and 20 more56 min
Oct 12, 10:11 PM CDTMesoscale DiscussionSPCDallam, Hansford, Ochiltree, Sherman94 min
Oct 12, 11:34 PM CDTMesoscale DiscussionSPCAndrews, Bailey, Cochran, Crosby, Dawson, Floyd and 9 more86 min
Oct 12, 11:52 PM CDTMesoscale DiscussionSPCDallam, Hansford, Hartley, Hutchinson, Lipscomb, Moore and 5 more83 min
Oct 13, 2:06 AM CDTMesoscale DiscussionSPCCarson, Gray, Hansford, Hemphill, Hutchinson, Lipscomb and 7 more84 min
Oct 13, 12:23 PM CDTMesoscale DiscussionSPCBaylor, Coke, Fisher, Foard, Hardeman, Haskell and 13 more3 hr
Oct 13, 1:00 PM CDTTornado WatchSPCArcher, Baylor, Callahan, Clay, Cooke, Eastland and 20 more8 hr
Oct 13, 1:10 PM CDTMesoscale DiscussionSPCCoke, Concho, Crockett, Irion, Menard, Reagan and 7 more95 min
Oct 13, 1:37 PM CDTSevere Thunderstorm WatchSPCBrown, Coke, Coleman, Concho, Crockett, Edwards and 19 more9 hr
Oct 13, 2:55 PM CDTMesoscale DiscussionSPCArcher, Baylor, Clay, Cooke, Haskell, Jack and 8 more95 min
Oct 13, 3:42 PM CDTMesoscale DiscussionSPCCoke, Crockett, Irion, Kinney, Maverick, Reagan and 6 more93 min
Oct 13, 6:59 PM CDTMesoscale DiscussionSPCArcher, Callahan, Clay, Collin, Cooke, Dallas and 25 more2 hr

Nearby

Mesoscale Discussions in Texas, 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.