Alert archive / Oklahoma / Mesoscale Discussions in 2018

Mesoscale Discussion 565

May 29, 201815 counties in Kansas; 17 counties in Oklahoma; Hemphill County, Lipscomb County, Ochiltree County, Texas

The Storm Prediction Center issued this mesoscale discussion at May 29, 2018, 1:55 PM CDT for 15 counties in Kansas; 17 counties in Oklahoma; Hemphill County, Lipscomb County, Ochiltree County, Texas. It was in force for 65 min.

The area

The outline as issued.

The facts

Issued: May 29, 2018, 1:55 PM CDT (18:55 UTC)
Expired: May 29, 2018, 3:00 PM CDT
In force: 65 min
Issued by: the Storm Prediction Center
Chance of a watch: 95%

All 35 counties

Barber County, KS, Clark County, KS, Comanche County, KS, Edwards County, KS, Ford County, KS, Harper County, KS, Kingman County, KS, Kiowa County, KS, Meade County, KS, Pratt County, KS, Reno County, KS, Sedgwick County, KS, Seward County, KS, Stafford County, KS, Sumner County, KS, Alfalfa County, OK, Beaver County, OK, Blaine County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Grant County, OK, Harper County, OK, Kay County, OK, Kingfisher County, OK, Logan County, OK, Major County, OK, Noble County, OK, Roger Mills County, OK, Woods County, OK, Woodward County, OK, Hemphill County, TX, Lipscomb County, TX, Ochiltree County, TX

The radar

The Vance AFB radar (KVNX), 116 km from the middle of the area, began a volume at 18:58 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.

The nearest sounding before it

Dodge City, (KDDC), launched 12:00Z, 6.9 hours before the alert went out and 114 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: 57 J/kg
Mixed-layer CIN: -422 J/kg
Mixed-layer LCL: 1490 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 131 m²/s²
0-3 km storm-relative helicity: 487 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.3

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 28, 9:06 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Decatur, Ellis, Graham, Norton, Osborne and 7 more	84 min
May 28, 9:08 PM CDT	Mesoscale Discussion	SPC	Clark, Comanche, Edwards, Ford, Gray, Hodgeman and 5 more	67 min
May 29, 2:01 PM CDT	Mesoscale Discussion	SPC	Atchison, Brown, Geary, Jackson, Jefferson, Lyon and 7 more	89 min
May 29, 2:19 PM CDT	Tornado Watch	SPC	Barber, Clark, Comanche, Harper, Kingman, Sedgwick and 1 more	8 hr
May 29, 2:40 PM CDT	Severe Thunderstorm Watch	SPC	Barton, Brown, Chase, Clay, Cloud, Dickinson and 33 more	7 hr
May 29, 3:10 PM CDT	Mesoscale Discussion	SPC	Cheyenne	95 min
May 29, 5:04 PM CDT	Mesoscale Discussion	SPC	Barton, Brown, Chase, Clay, Cloud, Dickinson and 26 more	116 min
May 29, 5:56 PM CDT	Mesoscale Discussion	SPC	Barber, Clark, Comanche, Harper, Kingman, Meade and 2 more	2 hr

Nearby

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