Alert archive / Oklahoma / Mesoscale Discussions in 2011

Mesoscale Discussion 2295

November 7, 201128 counties in Oklahoma; 9 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Nov 7, 2011, 7:43 PM CST for 28 counties in Oklahoma; 9 counties in Texas. It was in force for 62 min.

The area

The outline as issued.

The facts

Issued
Nov 7, 2011, 7:43 PM CST (01:43 UTC)
Expired
Nov 7, 2011, 8:45 PM CST
In force
62 min
Issued by
the Storm Prediction Center
All 37 counties

Caddo County, OK, Canadian County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Creek County, OK, Garvin County, OK, Grady County, OK, Jefferson County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, Mayes County, OK, McClain County, OK, Nowata County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Pawnee County, OK, Payne County, OK, Pottawatomie County, OK, Rogers County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Foard County, TX, Haskell County, TX, Knox County, TX, Stonewall County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Norman radar (KTLX), 27 km from the middle of the area, began a volume at 01:45 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

Norman, OK (KOUN), launched 00:00Z, 1.7 hours before the alert went out and 15 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, Norman, OK at 00:00Z on 2011-11-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1647 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, Norman, OK at 00:00Z on 2011-11-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 316 square meters per square second.1939587897Sfc1 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
1647 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
574 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
316 m²/s²
0-3 km storm-relative helicity
325 m²/s²
Significant tornado parameter
3.0
Supercell composite
12.9

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, 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, 2:12 AM CSTMesoscale DiscussionSPCAtoka, Bryan, Carter, Coal, Jefferson, Johnston and 4 more93 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 Oklahoma, 2011Mesoscale Discussions in Texas, 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.