Alert archive / Arkansas / Mesoscale Discussions in 2013

Mesoscale Discussion 924

June 1, 20136 states

The Storm Prediction Center issued this mesoscale discussion at Jun 1, 2013, 3:46 AM CDT for 6 states. It was in force for 29 min.

The area

The outline as issued.

The facts

Issued: Jun 1, 2013, 3:46 AM CDT (08:46 UTC)
Expired: Jun 1, 2013, 4:15 AM CDT
In force: 29 min
Issued by: the Storm Prediction Center

All 73 counties

Baxter County, AR, Clay County, AR, Cleburne County, AR, Conway County, AR, Craighead County, AR, Crawford County, AR, Franklin County, AR, Fulton County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Johnson County, AR, Lawrence County, AR, Logan County, AR, Marion County, AR, Mississippi County, AR, Montgomery County, AR, Newton County, AR, Poinsett County, AR, Polk County, AR, Pope County, AR, Randolph County, AR, Scott County, AR, Searcy County, AR, Sebastian County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, Yell County, AR, Massac County, IL, Ballard County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Christian County, KY, Crittenden County, KY, Daviess County, KY, Fulton County, KY, Graves County, KY, Hancock County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Muhlenberg County, KY, Ohio County, KY, Trigg County, KY, Webster County, KY, Butler County, MO, Dunklin County, MO, Mississippi County, MO, New Madrid County, MO, Oregon County, MO, Pemiscot County, MO, Ripley County, MO, Scott County, MO, Stoddard County, MO, Coal County, OK, Haskell County, OK, Hughes County, OK, Latimer County, OK, LeFlore County, OK, McIntosh County, OK, Pittsburg County, OK, Sequoyah County, OK, Dyer County, TN, Lake County, TN, Obion County, TN, Weakley County, TN

The radar

The Little Rock radar (KLZK), 147 km from the middle of the area, began a volume at 08:50 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

Little Rock, AR (KLZK), launched 00:00Z, 8.8 hours before the alert went out and 210 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: 3909 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 814 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 106 m²/s²
0-3 km storm-relative helicity: 178 m²/s²
Significant tornado parameter: 2.6
Supercell composite: 14.5

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
May 31, 11:08 PM CDT	Mesoscale Discussion	SPC	Crawford, Sebastian	67 min
May 31, 11:23 PM CDT	Tornado Watch	SPC	Baxter, Benton, Boone, Carroll, Crawford, Franklin and 11 more	5 hr
Jun 1, 1:51 AM CDT	Mesoscale Discussion	SPC	Benton, Boone, Carroll, Madison, Marion, Washington	114 min
Jun 1, 2:19 AM CDT	Mesoscale Discussion	SPC	Boone, Crawford, Franklin, Johnson, Logan, Madison and 5 more	116 min
Jun 1, 9:53 AM CDT	Mesoscale Discussion	SPC	Arkansas, Bradley, Calhoun, Clark, Cleveland, Craighead and 22 more	2 hr
May 31, 7:05 PM CDT	Mesoscale Discussion	SPC	Bond, Calhoun, Christian, Greene, Jersey, Macon and 5 more	85 min
May 31, 7:23 PM CDT	Tornado Watch	SPC	Champaign, Christian, Clark, Clay, Coles, Crawford and 12 more	6 hr
May 31, 8:46 PM CDT	Mesoscale Discussion	SPC	Bond, Clay, Clinton, Coles, Cumberland, Effingham and 16 more	59 min
May 31, 9:37 PM CDT	Tornado Watch	SPC	Alexander, Clinton, Edwards, Franklin, Gallatin, Hamilton and 19 more	6 hr
May 31, 9:47 PM CDT	Mesoscale Discussion	SPC	Iroquois	58 min
May 31, 10:11 PM CDT	Tornado Watch	SPC	Ford, Iroquois	5 hr
Jun 1, 1:13 AM CDT	Mesoscale Discussion	SPC	Crawford, Lawrence, Wabash	2 hr
Jun 1, 1:24 PM CDT	Mesoscale Discussion	SPC	Adair, Allen, Anderson, Barren, Bath, Boone and 61 more	96 min
Jun 1, 5:05 PM CDT	Mesoscale Discussion	SPC	Bath, Bell, Breathitt, Clark, Clay, Clinton and 20 more	85 min
May 31, 8:02 PM CDT	Mesoscale Discussion	SPC	Canadian, Carter, Cleveland, Craig, Creek, Garvin and 17 more	58 min
May 31, 11:46 PM CDT	Severe Thunderstorm Watch	SPC	Blaine, Caddo, Canadian, Cleveland, Grady, Hughes and 9 more	5 hr
Jun 1, 2:30 AM CDT	Mesoscale Discussion	SPC	Blaine, Canadian, Cleveland, Hughes, Kingfisher, Lincoln and 6 more	2 hr

Nearby

Mesoscale Discussions in Arkansas, 2013 Mesoscale Discussions in Kentucky, 2013 Mesoscale Discussions in Missouri, 2013 Every mesoscale discussion in 2013

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.