Alert archive / Arkansas / Mesoscale Discussions in 2014

Mesoscale Discussion 852

June 6, 201438 counties in Arkansas; LeFlore County, McCurtain County, Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Jun 6, 2014, 9:52 AM CDT for 38 counties in Arkansas; LeFlore County, McCurtain County, Oklahoma. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued: Jun 6, 2014, 9:52 AM CDT (14:52 UTC)
Expired: Jun 6, 2014, 10:45 AM CDT
In force: 53 min
Issued by: the Storm Prediction Center
Chance of a watch: 80%

All 40 counties

Arkansas County, AR, Bradley County, AR, Calhoun County, AR, Clark County, AR, Cleveland County, AR, Conway County, AR, Crawford County, AR, Dallas County, AR, Drew County, AR, Faulkner County, AR, Franklin County, AR, Garland County, AR, Grant County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Jefferson County, AR, Johnson County, AR, Lincoln County, AR, Logan County, AR, Lonoke County, AR, Monroe County, AR, Montgomery County, AR, Nevada County, AR, Ouachita County, AR, Perry County, AR, Pike County, AR, Polk County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, Scott County, AR, Sebastian County, AR, Sevier County, AR, White County, AR, Woodruff County, AR, Yell County, AR, LeFlore County, OK, McCurtain County, OK

The radar

The Little Rock radar (KLZK), 97 km from the middle of the area, began a volume at 14:55 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.

Severe Thunderstorm Watch 239Jun 6, 10:20 AM CDT

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 2.9 hours before the alert went out and 240 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1525 J/kg
Mixed-layer CIN: -91 J/kg
Mixed-layer LCL: 700 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 147 m²/s²
0-3 km storm-relative helicity: 150 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.3

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.

Issued	Product	Office	Counties	Lasted
Jun 5, 9:14 PM CDT	Mesoscale Discussion	SPC	Benton, Carroll	3 hr
Jun 5, 9:36 PM CDT	Severe Thunderstorm Watch	SPC	Benton, Carroll, Madison, Washington	7 hr
Jun 6, 10:18 AM CDT	Severe Thunderstorm Watch	SPC	Arkansas, Baxter, Benton, Boone, Bradley, Calhoun and 51 more	5 hr
Jun 6, 11:22 AM CDT	Mesoscale Discussion	SPC	Crittenden, Lee, Phillips, St. Francis	83 min
Jun 6, 11:51 AM CDT	Severe Thunderstorm Watch	SPC	Ashley, Chicot, Clay, Craighead, Crittenden, Cross and 8 more	7 hr
Jun 6, 12:49 PM CDT	Mesoscale Discussion	SPC	Conway, Faulkner, Grant, Hot Spring, Jefferson, Lonoke and 8 more	56 min
Jun 6, 2:43 PM CDT	Mesoscale Discussion	SPC	Arkansas, Cleburne, Craighead, Crittenden, Cross, Desha and 22 more	92 min
Jun 5, 7:37 PM CDT	Mesoscale Discussion	SPC	Cimarron	113 min
Jun 5, 7:54 PM CDT	Mesoscale Discussion	SPC	Cimarron, Texas	2 hr
Jun 5, 11:49 PM CDT	Mesoscale Discussion	SPC	Cimarron	116 min
Jun 6, 1:17 AM CDT	Mesoscale Discussion	SPC	Beckham, Blaine, Caddo, Canadian, Carter, Cleveland and 28 more	88 min
Jun 6, 1:43 AM CDT	Severe Thunderstorm Watch	SPC	Alfalfa, Beaver, Beckham, Blaine, Caddo, Canadian and 27 more	6 hr
Jun 6, 4:05 AM CDT	Mesoscale Discussion	SPC	Adair, Beckham, Blaine, Caddo, Canadian, Cherokee and 39 more	115 min
Jun 6, 5:47 AM CDT	Mesoscale Discussion	SPC	Beaver, Beckham, Blaine, Caddo, Canadian, Comanche and 13 more	88 min
Jun 6, 7:02 AM CDT	Severe Thunderstorm Watch	SPC	Adair, Atoka, Bryan, Carter, Cherokee, Choctaw and 30 more	5 hr
Jun 6, 1:29 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Beaver, Grant, Harper, Major, Woods and 1 more	3 hr
Jun 6, 3:23 PM CDT	Mesoscale Discussion	SPC	Cimarron, Texas	67 min
Jun 6, 3:43 PM CDT	Tornado Watch	SPC	Beaver, Cimarron, Texas	6 hr
Jun 6, 6:25 PM CDT	Mesoscale Discussion	SPC	Beaver, Cimarron, Texas	95 min
Jun 6, 6:44 PM CDT	Tornado Watch	SPC	Beaver, Cimarron, Texas	6 hr

Nearby

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