Alert archive / Oklahoma / Mesoscale Discussions in 2014

Mesoscale Discussion 873

June 7, 20144 counties in Arkansas; 37 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Jun 7, 2014, 1:54 AM CDT for 4 counties in Arkansas; 37 counties in Oklahoma. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 7, 2014, 1:54 AM CDT (06:54 UTC)
Expired
Jun 7, 2014, 4:00 AM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 41 counties

Benton County, AR, Crawford County, AR, Sebastian County, AR, Washington County, AR, Adair County, OK, Atoka County, OK, Cherokee County, OK, Cleveland County, OK, Coal County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Garvin County, OK, Haskell County, OK, Hughes County, OK, Latimer County, OK, LeFlore County, OK, Lincoln County, OK, Mayes County, OK, McClain County, OK, McIntosh County, OK, Murray County, OK, Muskogee County, OK, Nowata County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Pushmataha County, OK, Rogers County, OK, Seminole County, OK, Sequoyah County, OK, Stephens County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The radar

The Norman radar (KTLX), 89 km from the middle of the area, began a volume at 06:57 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

Norman, OK (KOUN), launched 00:00Z, 6.9 hours before the alert went out and 104 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 2014-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2151 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 2014-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 108 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
2151 J/kg
Mixed-layer CIN
-107 J/kg
Mixed-layer LCL
1170 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
108 m²/s²
0-3 km storm-relative helicity
119 m²/s²
Significant tornado parameter
0.5
Supercell composite
10.0

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, 12:25 PM CDTMesoscale DiscussionSPCBaxter, Clay, Cleburne, Craighead, Fulton, Greene and 12 more2 hr
Jun 7, 1:06 PM CDTMesoscale DiscussionSPCFranklin, Logan, Montgomery, Polk, Scott, Sebastian and 1 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

Nearby

Mesoscale Discussions in Oklahoma, 2014Mesoscale Discussions in Arkansas, 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.