Alert archive / Texas / Mesoscale Discussions in 2026

Mesoscale Discussion 907

May 30, 20264 counties in Oklahoma; 16 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 30, 2026, 3:47 PM CDT for 4 counties in Oklahoma; 16 counties in Texas. It was in force for 118 min.

The area

The outline as issued.

The facts

Issued: May 30, 2026, 3:47 PM CDT (20:47 UTC)
Expired: May 30, 2026, 5:45 PM CDT
In force: 118 min
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch possible
Chance of a watch: 40%

Counties Beckham County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Dickens County, TX, Donley County, TX, Foard County, TX, Hall County, TX, Hardeman County, TX, Haskell County, TX, Kent County, TX, King County, TX, Knox County, TX, Motley County, TX, Stonewall County, TX, Wheeler County, TX, Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 120 km from the middle of the area, began a volume at 20:48 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 255May 30, 5:50 PM CDT

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 8.8 hours before the alert went out and 288 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: 843 J/kg
Mixed-layer CIN: -223 J/kg
Mixed-layer LCL: 1363 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 179 m²/s²
0-3 km storm-relative helicity: 174 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

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 29, 8:16 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Garfield, Grant, Kay, Kingfisher, Logan and 5 more	119 min
May 30, 2:28 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Garfield, Grant, Kay, Woods	3 hr
May 30, 3:10 PM CDT	Mesoscale Discussion	SPC	Craig, Delaware, Ottawa	2 hr
May 30, 3:34 PM CDT	Severe Thunderstorm Watch	SPC	Alfalfa, Garfield, Grant, Kay, Major, Noble and 1 more	6 hr
May 30, 5:47 PM CDT	Severe Thunderstorm Watch	SPC	Beckham, Custer, Greer, Harmon, Jackson, Kiowa and 3 more	2 hr
May 30, 6:53 PM CDT	Mesoscale Discussion	SPC	Beckham, Comanche, Cotton, Greer, Harmon, Jackson and 3 more	2 hr
May 29, 7:28 PM CDT	Mesoscale Discussion	SPC	Andrews, Armstrong, Borden, Briscoe, Carson, Castro and 44 more	62 min
May 29, 9:14 PM CDT	Mesoscale Discussion	SPC	Childress, Collingsworth, Donley, Gray, Hall, Wheeler	61 min
May 30, 5:31 PM CDT	Mesoscale Discussion	SPC	Coke, Concho, Crockett, Irion, Reagan, Runnels and 4 more	119 min

Nearby

Mesoscale Discussions in Texas, 2026 Mesoscale Discussions in Oklahoma, 2026 Every mesoscale discussion in 2026

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.