Alert archive / Oklahoma / Mesoscale Discussions in 2013

Mesoscale Discussion 882

May 30, 20134 states

The Storm Prediction Center issued this mesoscale discussion at May 30, 2013, 2:35 PM CDT for 4 states. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued: May 30, 2013, 2:35 PM CDT (19:35 UTC)
Expired: May 30, 2013, 3:30 PM CDT
In force: 55 min
Issued by: the Storm Prediction Center

All 64 counties

Benton County, AR, Crawford County, AR, Franklin County, AR, Garland County, AR, Howard County, AR, Logan County, AR, Madison County, AR, Montgomery County, AR, Pike County, AR, Polk County, AR, Scott County, AR, Sebastian County, AR, Sevier County, AR, Washington County, AR, Yell County, AR, Cherokee County, KS, Barry County, MO, Jasper County, MO, McDonald County, MO, Newton County, MO, Adair County, OK, Atoka County, OK, Carter County, OK, Cherokee County, OK, Choctaw County, OK, Cleveland County, OK, Coal County, OK, Comanche County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Garvin County, OK, Grady County, OK, Haskell County, OK, Hughes County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, Lincoln County, OK, Mayes County, OK, McClain County, OK, McCurtain 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, Ottawa 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 Western Arkansas radar (KSRX), 82 km from the middle of the area, began a volume at 19:34 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 12:00Z, 7.6 hours before the alert went out and 195 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: 2281 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 542 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 366 m²/s²
0-3 km storm-relative helicity: 703 m²/s²
Significant tornado parameter: 4.2
Supercell composite: 22.1

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 29, 10:44 PM CDT	Severe Thunderstorm Watch	SPC	Benton, Crawford, Sebastian, Washington	7 hr
May 30, 11:44 AM CDT	Mesoscale Discussion	SPC	Benton, Boone, Carroll, Crawford, Franklin, Johnson and 7 more	91 min
May 30, 1:21 PM CDT	Tornado Watch	SPC	Baxter, Benton, Boone, Carroll, Clark, Cleburne and 30 more	8 hr
May 30, 5:23 PM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Clark, Cleburne and 29 more	2 hr
May 29, 7:36 PM CDT	Mesoscale Discussion	SPC	Barber, Barton, Clark, Comanche, Edwards, Ellis and 20 more	84 min
May 29, 8:06 PM CDT	Mesoscale Discussion	SPC	Jewell, Mitchell, Osborne, Phillips, Rooks, Smith	54 min
May 30, 1:55 PM CDT	Mesoscale Discussion	SPC	Barber, Barton, Cheyenne, Clark, Comanche, Decatur and 35 more	2 hr
May 30, 11:29 AM CDT	Mesoscale Discussion	SPC	Bollinger, Cape Girardeau, Carter, Clark, Crawford, Dent and 23 more	61 min
May 30, 12:32 PM CDT	Tornado Watch	SPC	Audrain, Bollinger, Boone, Callaway, Cape Girardeau, Clark and 28 more	7 hr
May 30, 2:16 PM CDT	Mesoscale Discussion	SPC	Audrain, Bollinger, Callaway, Cape Girardeau, Clark, Crawford and 28 more	59 min
May 30, 3:52 PM CDT	Mesoscale Discussion	SPC	Audrain, Bollinger, Callaway, Cape Girardeau, Clark, Crawford and 28 more	113 min
May 29, 10:25 PM CDT	Mesoscale Discussion	SPC	Atoka, Canadian, Carter, Cleveland, Coal, Creek and 21 more	65 min
May 30, 3:18 AM CDT	Mesoscale Discussion	SPC	Atoka, Canadian, Carter, Cleveland, Coal, Creek and 21 more	87 min
May 30, 12:20 PM CDT	Mesoscale Discussion	SPC	Caddo, Canadian, Carter, Cleveland, Comanche, Cotton and 20 more	2 hr
May 30, 12:52 PM CDT	Tornado Watch	SPC	Atoka, Bryan, Caddo, Canadian, Carter, Cleveland and 38 more	10 hr
May 30, 5:52 PM CDT	Mesoscale Discussion	SPC	Atoka, Carter, Cherokee, Cleveland, Coal, Comanche and 29 more	113 min

Nearby

Mesoscale Discussions in Oklahoma, 2013 Mesoscale Discussions in Arkansas, 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.