Alert archive / Oklahoma / Mesoscale Discussions in 2019

Mesoscale Discussion 552

May 5, 20194 counties in Kansas; 16 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at May 5, 2019, 9:19 PM CDT for 4 counties in Kansas; 16 counties in Oklahoma. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued: May 5, 2019, 9:19 PM CDT (02:19 UTC)
Expired: May 5, 2019, 10:15 PM CDT
In force: 56 min
Issued by: the Storm Prediction Center
Chance of a watch: 80%

Counties Chautauqua County, KS, Elk County, KS, Montgomery County, KS, Wilson County, KS, Canadian County, OK, Cleveland County, OK, Creek County, OK, Grady County, OK, Lincoln County, OK, Logan County, OK, McClain County, OK, Nowata County, OK, Oklahoma County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Pottawatomie County, OK, Rogers County, OK, Tulsa County, OK, Washington County, OK

The radar

The Norman radar (KTLX), 81 km from the middle of the area, began a volume at 02:18 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 137May 5, 9:40 PM CDT

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 2.3 hours before the alert went out and 96 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: 1390 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 1111 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 54 m²/s²
0-3 km storm-relative helicity: 178 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 8.0

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 5, 7:17 PM CDT	Mesoscale Discussion	SPC	Barber, Barton, Clark, Comanche, Edwards, Ford and 15 more	58 min
May 5, 9:18 PM CDT	Mesoscale Discussion	SPC	Atchison, Brown, Clay, Cloud, Dickinson, Doniphan and 14 more	57 min
May 5, 9:41 PM CDT	Severe Thunderstorm Watch	SPC	Chautauqua, Elk, Greenwood, Montgomery, Wilson	6 hr
May 6, 1:16 PM CDT	Mesoscale Discussion	SPC	Cloud, Jewell, Mitchell, Osborne, Phillips, Republic and 2 more	119 min
May 6, 3:47 PM CDT	Mesoscale Discussion	SPC	Barton, Dickinson, Ellsworth, Finney, Hodgeman, Lane and 7 more	88 min
May 6, 3:49 PM CDT	Severe Thunderstorm Watch	SPC	Atchison, Brown, Clay, Dickinson, Doniphan, Geary and 14 more	5 hr
May 6, 5:08 PM CDT	Mesoscale Discussion	SPC	Anderson, Atchison, Brown, Chase, Clay, Coffey and 24 more	97 min
May 6, 5:13 PM CDT	Tornado Watch	SPC	Allen, Anderson, Barton, Butler, Chase, Coffey and 22 more	7 hr
May 6, 5:48 PM CDT	Mesoscale Discussion	SPC	Clark, Finney, Ford, Grant, Gray, Hamilton and 9 more	87 min
May 6, 6:46 PM CDT	Tornado Watch	SPC	Barber, Clark, Comanche, Edwards, Finney, Ford and 19 more	6 hr
May 5, 8:30 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Beckham, Blaine, Custer, Dewey, Ellis and 8 more	90 min
May 6, 3:30 PM CDT	Mesoscale Discussion	SPC	Cimarron, Texas	2 hr

Nearby

Mesoscale Discussions in Oklahoma, 2019 Mesoscale Discussions in Kansas, 2019 Every mesoscale discussion in 2019

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.