Alert archive / Oklahoma / Mesoscale Discussions in 2014

Mesoscale Discussion 878

June 7, 20147 counties in Arkansas; 33 counties in Oklahoma; 4 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 7, 2014, 1:06 PM CDT for 7 counties in Arkansas; 33 counties in Oklahoma; 4 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 7, 2014, 1:06 PM CDT (18:06 UTC)
Expired
Jun 7, 2014, 3:30 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
60%
All 44 counties

Franklin County, AR, Logan County, AR, Montgomery County, AR, Polk County, AR, Scott County, AR, Sebastian County, AR, Yell County, AR, Atoka County, OK, Bryan County, OK, Caddo County, OK, Carter County, OK, Choctaw County, OK, Cleveland County, OK, Coal County, OK, Comanche County, OK, Cotton County, OK, Garvin County, OK, Grady County, OK, Haskell County, OK, Hughes County, OK, Jackson County, OK, Jefferson County, OK, Johnston County, OK, Kiowa County, OK, Latimer County, OK, LeFlore County, OK, Love County, OK, Marshall County, OK, McClain County, OK, McCurtain County, OK, McIntosh County, OK, Murray County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Pushmataha County, OK, Seminole County, OK, Sequoyah County, OK, Stephens County, OK, Tillman County, OK, Clay County, TX, Montague County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Norman radar (KTLX), 87 km from the middle of the area, began a volume at 18:09 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 12:00Z, 6.1 hours before the alert went out and 85 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 12:00Z on 2014-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 208 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 12:00Z on 2014-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 85 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
208 J/kg
Mixed-layer CIN
-382 J/kg
Mixed-layer LCL
1345 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
85 m²/s²
0-3 km storm-relative helicity
112 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
Jun 7, 1:54 AM CDTMesoscale DiscussionSPCBenton, Crawford, Sebastian, Washington2 hr
Jun 7, 12:25 PM CDTMesoscale DiscussionSPCBaxter, Clay, Cleburne, Craighead, Fulton, Greene and 12 more2 hr
Jun 7, 2:44 PM CDTSevere Thunderstorm WatchSPCClay, Cleburne, Conway, Craighead, Crittenden, Cross and 33 more6 hr
Jun 7, 4:44 PM CDTTornado WatchSPCCraighead, Greene, Mississippi, Poinsett7 hr
Jun 7, 6:32 PM CDTMesoscale DiscussionSPCArkansas, Grant, Hot Spring, Jefferson, Lee, Lincoln and 6 more88 min
Jun 6, 7:09 PM CDTTornado WatchSPCBeaver, Cimarron, Texas6 hr
Jun 6, 8:05 PM CDTTornado WatchSPCAlfalfa, Beckham, Blaine, Custer, Dewey, Ellis and 15 more7 hr
Jun 6, 10:55 PM CDTMesoscale DiscussionSPCCaddo, Canadian, Cleveland, Comanche, Creek, Garfield and 22 more2 hr
Jun 6, 11:24 PM CDTSevere Thunderstorm WatchSPCCaddo, Canadian, Carter, Cleveland, Comanche, Cotton and 29 more6 hr
Jun 7, 3:27 PM CDTMesoscale DiscussionSPCBailey, Briscoe, Castro, Cochran, Crosby, Deaf Smith and 9 more2 hr
Jun 7, 5:44 PM CDTTornado WatchSPCArmstrong, Bailey, Briscoe, Carson, Castro, Childress and 28 more7 hr
Jun 7, 5:51 PM CDTMesoscale DiscussionSPCAndrews, Borden, Brewster, Crane, Dawson, Ector and 17 more114 min
Jun 7, 6:16 PM CDTSevere Thunderstorm WatchSPCAndrews, Borden, Crane, Dawson, Ector, Gaines and 8 more9 hr

Nearby

Mesoscale Discussions in Oklahoma, 2014Mesoscale Discussions in Arkansas, 2014Mesoscale Discussions in Texas, 2014Every mesoscale discussion in 2014

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.