Alert archive / Arkansas / Mesoscale Discussions in 2013

Mesoscale Discussion 970

June 5, 20134 states

The Storm Prediction Center issued this mesoscale discussion at Jun 5, 2013, 6:12 PM CDT for 4 states. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued: Jun 5, 2013, 6:12 PM CDT (23:12 UTC)
Expired: Jun 5, 2013, 7:45 PM CDT
In force: 93 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 44 counties

Arkansas County, AR, Clay County, AR, Cleburne County, AR, Conway County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Faulkner County, AR, Fulton County, AR, Garland County, AR, Grant County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Jefferson County, AR, Lawrence County, AR, Lee County, AR, Lonoke County, AR, Mississippi County, AR, Monroe County, AR, Perry County, AR, Phillips County, AR, Poinsett County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Randolph County, AR, Saline County, AR, Searcy County, AR, Sharp County, AR, St. Francis County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Dunklin County, MO, Pemiscot County, MO, Ripley County, MO, DeSoto County, MS, Tunica County, MS, Lauderdale County, TN, Shelby County, TN, Tipton County, TN

The radar

The Little Rock radar (KLZK), 105 km from the middle of the area, began a volume at 23:14 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 12:00Z, 11.2 hours before the alert went out and 153 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: 687 J/kg
Mixed-layer CIN: -158 J/kg
Mixed-layer LCL: 952 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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.

Issued	Product	Office	Counties	Lasted
Jun 5, 11:53 AM CDT	Mesoscale Discussion	SPC	Chicot, Crittenden, Desha, Lee, Phillips, St. Francis	97 min
Jun 5, 1:10 PM CDT	Severe Thunderstorm Watch	SPC	Ashley, Chicot	6 hr
Jun 5, 4:03 PM CDT	Mesoscale Discussion	SPC	Attala, Carroll, Choctaw, Claiborne, Copiah, Hinds and 16 more	87 min
Jun 5, 5:48 PM CDT	Mesoscale Discussion	SPC	Clarke, Copiah, Covington, Franklin, Jasper, Jefferson Davis and 11 more	87 min
Jun 5, 5:23 PM CDT	Mesoscale Discussion	SPC	Carter, Cocke, Greene, Hamblen, Hawkins, Jefferson and 4 more	97 min

Nearby

Mesoscale Discussions in Arkansas, 2013 Mesoscale Discussions in Missouri, 2013 Mesoscale Discussions in Tennessee, 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.