Alert archive / Oklahoma / Mesoscale Discussions in 2018

Mesoscale Discussion 583

May 31, 20184 states

The Storm Prediction Center issued this mesoscale discussion at May 31, 2018, 2:59 AM CDT for 4 states. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued: May 31, 2018, 2:59 AM CDT (07:59 UTC)
Expired: May 31, 2018, 4:00 AM CDT
In force: 61 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

All 49 counties

Benton County, AR, Boone County, AR, Carroll County, AR, Crawford County, AR, Franklin County, AR, Johnson County, AR, Madison County, AR, Newton County, AR, Washington County, AR, Allen County, KS, Bourbon County, KS, Cherokee County, KS, Crawford County, KS, Labette County, KS, Montgomery County, KS, Neosho County, KS, Wilson County, KS, Woodson County, KS, Barry County, MO, Barton County, MO, Cedar County, MO, Christian County, MO, Dade County, MO, Greene County, MO, Jasper County, MO, Lawrence County, MO, McDonald County, MO, Newton County, MO, Polk County, MO, St. Clair County, MO, Stone County, MO, Taney County, MO, Vernon County, MO, Adair County, OK, Cherokee County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Mayes County, OK, McIntosh County, OK, Muskogee County, OK, Nowata County, OK, Okmulgee County, OK, Ottawa County, OK, Rogers County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 86 km from the middle of the area, began a volume at 08:00 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

Springfield, MO (KSGF), launched 00:00Z, 8.0 hours before the alert went out and 93 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: 1971 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 1302 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 213 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 4.9

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 31, 12:24 PM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Clay, Fulton and 4 more	96 min
May 31, 1:57 PM CDT	Tornado Watch	SPC	Clay, Greene, Lawrence, Randolph	6 hr
May 31, 4:42 PM CDT	Mesoscale Discussion	SPC	Clay, Randolph	2 hr
May 31, 5:46 PM CDT	Mesoscale Discussion	SPC	Clay, Cleburne, Craighead, Fulton, Greene, Independence and 8 more	2 hr
May 30, 8:22 PM CDT	Mesoscale Discussion	SPC	Barber, Butler, Chautauqua, Comanche, Cowley, Elk and 9 more	53 min
May 30, 9:14 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Barber, Butler, Chautauqua, Clark, Comanche and 12 more	8 hr
May 30, 10:40 PM CDT	Mesoscale Discussion	SPC	Barber, Butler, Chautauqua, Comanche, Cowley, Elk and 4 more	2 hr
May 31, 1:07 AM CDT	Mesoscale Discussion	SPC	Noble, Pawnee	53 min

Nearby

Mesoscale Discussions in Oklahoma, 2018 Mesoscale Discussions in Missouri, 2018 Mesoscale Discussions in Arkansas, 2018 Every mesoscale discussion in 2018

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.