Alert archive / Texas / Mesoscale Discussions in 2011

Mesoscale Discussion 2299

November 8, 201110 counties in Oklahoma; 34 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Nov 8, 2011, 2:12 AM CST for 10 counties in Oklahoma; 34 counties in Texas. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued
Nov 8, 2011, 2:12 AM CST (08:12 UTC)
Expired
Nov 8, 2011, 3:45 AM CST
In force
93 min
Issued by
the Storm Prediction Center
All 44 counties

Atoka County, OK, Bryan County, OK, Carter County, OK, Coal County, OK, Jefferson County, OK, Johnston County, OK, Love County, OK, Marshall County, OK, Murray County, OK, Pontotoc County, OK, Archer County, TX, Baylor County, TX, Brown County, TX, Callahan County, TX, Clay County, TX, Coleman County, TX, Collin County, TX, Comanche County, TX, Cooke County, TX, Dallas County, TX, Denton County, TX, Eastland County, TX, Erath County, TX, Fannin County, TX, Grayson County, TX, Haskell County, TX, Hood County, TX, Hunt County, TX, Jack County, TX, Johnson County, TX, Jones County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, Rockwall County, TX, Runnels County, TX, Shackelford County, TX, Somervell County, TX, Stephens County, TX, Tarrant County, TX, Taylor County, TX, Throckmorton County, TX, Wise County, TX, Young County, TX

The radar

The Dyess AFB radar (KDYX), 113 km from the middle of the area, began a volume at 08:15 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 nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 8.2 hours before the alert went out and 112 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 00:00Z on 2011-11-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1725 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 2011-11-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 236 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
1725 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
615 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
236 m²/s²
0-3 km storm-relative helicity
303 m²/s²
Significant tornado parameter
2.9
Supercell composite
10.8

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
Nov 7, 7:43 PM CSTMesoscale DiscussionSPCCaddo, Canadian, Cleveland, Comanche, Cotton, Creek and 22 more62 min
Nov 7, 8:28 PM CSTTornado WatchSPCAdair, Caddo, Canadian, Carter, Cherokee, Cleveland and 36 more8 hr
Nov 7, 11:20 PM CSTMesoscale DiscussionSPCCarter, Cherokee, Cleveland, Cotton, Craig, Creek and 22 more85 min
Nov 8, 1:17 AM CSTMesoscale DiscussionSPCAdair, Atoka, Cherokee, Coal, Haskell, Hughes and 7 more118 min
Nov 8, 9:38 AM CSTMesoscale DiscussionSPCHaskell, LeFlore, Sequoyah67 min
Nov 8, 10:31 AM CSTMesoscale DiscussionSPCMcCurtain29 min
Nov 8, 10:49 AM CSTTornado WatchSPCChoctaw, LeFlore, McCurtain, Pushmataha7 hr
Nov 8, 1:03 PM CSTMesoscale DiscussionSPCChoctaw, McCurtain57 min
Nov 8, 3:48 PM CSTMesoscale DiscussionSPCMcCurtain87 min
Nov 7, 6:44 PM CSTTornado WatchSPCBosque, Camp, Collin, Cooke, Coryell, Dallas and 24 more2 hr
Nov 7, 8:53 PM CSTMesoscale DiscussionSPCBorden, Coke, Fisher, Glasscock, Haskell, Howard and 9 more2 hr
Nov 7, 9:16 PM CSTTornado WatchSPCBorden, Callahan, Coke, Coleman, Concho, Crane and 31 more8 hr
Nov 8, 1:44 PM CSTMesoscale DiscussionSPCAustin, Chambers, Grimes, Hardin, Harris, Jasper and 10 more61 min
Nov 8, 1:59 PM CSTTornado WatchSPCChambers, Grimes, Hardin, Harris, Houston, Jasper and 12 more6 hr
Nov 8, 3:53 PM CSTMesoscale DiscussionSPCAngelina, Grimes, Hardin, Harris, Jasper, Liberty and 7 more2 hr
Nov 8, 5:09 PM CSTMesoscale DiscussionSPCHardin, Jasper, Newton, Orange, Sabine, San Augustine and 2 more66 min
Nov 8, 5:30 PM CSTTornado WatchSPCAngelina, Hardin, Jasper, Jefferson, Nacogdoches, Newton and 6 more7 hr

Nearby

Mesoscale Discussions in Texas, 2011Mesoscale Discussions in Oklahoma, 2011Every mesoscale discussion in 2011

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.