Alert archive / Oklahoma / Mesoscale Discussions in 2015

Mesoscale Discussion 1197

June 26, 20156 counties in Arkansas; 23 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Jun 26, 2015, 2:35 PM CDT for 6 counties in Arkansas; 23 counties in Oklahoma. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued: Jun 26, 2015, 2:35 PM CDT (19:35 UTC)
Expired: Jun 26, 2015, 4:00 PM CDT
In force: 85 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

All 29 counties

Benton County, AR, Crawford County, AR, Franklin County, AR, Madison County, AR, Sebastian County, AR, Washington County, AR, Adair County, OK, Cherokee County, OK, Cleveland County, OK, Creek County, OK, Delaware County, OK, Haskell County, OK, Hughes County, OK, Lincoln County, OK, Mayes County, OK, McClain County, OK, McIntosh County, OK, Muskogee County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Payne County, OK, Pittsburg County, OK, Pottawatomie County, OK, Rogers County, OK, Seminole County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK

The radar

The Tulsa radar (KINX), 59 km from the middle of the area, began a volume at 19:37 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 362Jun 26, 3:30 PM CDT

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 7.6 hours before the alert went out and 187 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: 686 J/kg
Mixed-layer CIN: -162 J/kg
Mixed-layer LCL: 1417 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 142 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 26, 11:50 AM CDT	Mesoscale Discussion	SPC	Baxter, Boone, Clay, Craighead, Fulton, Greene and 8 more	115 min
Jun 26, 12:18 PM CDT	Severe Thunderstorm Watch	SPC	Baxter, Boone, Clay, Cleburne, Craighead, Crittenden and 15 more	7 hr
Jun 26, 3:16 PM CDT	Mesoscale Discussion	SPC	Clay, Cleburne, Conway, Craighead, Crittenden, Cross and 33 more	89 min
Jun 26, 3:31 PM CDT	Severe Thunderstorm Watch	SPC	Arkansas, Clark, Cleveland, Conway, Crawford, Cross and 33 more	5 hr
Jun 26, 6:28 PM CDT	Mesoscale Discussion	SPC	Arkansas, Clark, Cleveland, Conway, Cross, Dallas and 26 more	92 min
Jun 25, 7:04 PM CDT	Mesoscale Discussion	SPC	Cimarron, Texas	86 min
Jun 26, 5:24 AM CDT	Mesoscale Discussion	SPC	Alfalfa, Beckham, Blaine, Caddo, Canadian, Custer and 19 more	96 min

Nearby

Mesoscale Discussions in Oklahoma, 2015 Mesoscale Discussions in Arkansas, 2015 Every mesoscale discussion in 2015

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.