Alert archive / Oklahoma / Mesoscale Discussions in 2018

Mesoscale Discussion 889

June 26, 20184 states

The Storm Prediction Center issued this mesoscale discussion at Jun 26, 2018, 12:56 PM CDT for 4 states. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued: Jun 26, 2018, 12:56 PM CDT (17:56 UTC)
Expired: Jun 26, 2018, 2:00 PM CDT
In force: 64 min
Issued by: the Storm Prediction Center
Chance of a watch: 80%

Counties Benton County, AR, Carroll County, AR, Madison County, AR, Washington County, AR, Chautauqua County, KS, Cherokee County, KS, Labette County, KS, Montgomery County, KS, Barry County, MO, McDonald County, MO, Newton County, MO, Stone County, MO, Adair County, OK, Craig County, OK, Delaware County, OK, Mayes County, OK, Nowata County, OK, Ottawa County, OK, Rogers County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 87 km from the middle of the area, began a volume at 17:55 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 223Jun 26, 1:25 PM CDT

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 5.9 hours before the alert went out and 91 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: 710 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 702 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 326 m²/s²
0-3 km storm-relative helicity: 289 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 6.7

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
Jun 26, 1:26 PM CDT	Severe Thunderstorm Watch	SPC	Benton, Carroll, Madison, Washington	6 hr
Jun 26, 2:46 PM CDT	Mesoscale Discussion	SPC	Benton, Carroll, Washington	89 min
Jun 26, 5:26 PM CDT	Severe Thunderstorm Watch	SPC	Baxter, Boone, Clay, Cleburne, Conway, Craighead and 22 more	6 hr
Jun 26, 6:49 PM CDT	Mesoscale Discussion	SPC	Baxter, Boone, Clay, Cleburne, Conway, Craighead and 20 more	116 min
Jun 26, 8:01 AM CDT	Mesoscale Discussion	SPC	Barton, Butler, Chase, Dickinson, Edwards, Ellis and 18 more	119 min
Jun 26, 8:58 AM CDT	Severe Thunderstorm Watch	SPC	Allen, Anderson, Barton, Butler, Chase, Chautauqua and 26 more	8 hr
Jun 26, 12:16 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Cherokee, Crawford, Franklin and 5 more	59 min
Jun 26, 12:35 PM CDT	Severe Thunderstorm Watch	SPC	Bourbon, Crawford, Johnson, Leavenworth, Linn, Miami and 1 more	7 hr
Jun 25, 8:08 PM CDT	Mesoscale Discussion	SPC	Bollinger, Cape Girardeau, Franklin, Jefferson, Mississippi, Perry and 7 more	2 hr
Jun 26, 2:19 AM CDT	Mesoscale Discussion	SPC	Barry, Benton, Callaway, Camden, Cedar, Christian and 32 more	116 min
Jun 26, 7:39 AM CDT	Mesoscale Discussion	SPC	Benton, Bollinger, Boone, Callaway, Camden, Cape Girardeau and 43 more	2 hr
Jun 26, 1:53 PM CDT	Mesoscale Discussion	SPC	Bollinger, Butler, Cape Girardeau, Carter, Crawford, Dent and 13 more	67 min
Jun 26, 2:22 PM CDT	Severe Thunderstorm Watch	SPC	Bollinger, Boone, Callaway, Cape Girardeau, Cole, Crawford and 19 more	6 hr

Nearby

Mesoscale Discussions in Oklahoma, 2018 Mesoscale Discussions in Arkansas, 2018 Mesoscale Discussions in Kansas, 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.