Alert archive / Oklahoma / Mesoscale Discussions in 2020

Mesoscale Discussion 965

June 22, 202010 counties in Oklahoma; Hemphill County, Wheeler County, Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 22, 2020, 3:16 AM CDT for 10 counties in Oklahoma; Hemphill County, Wheeler County, Texas. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued: Jun 22, 2020, 3:16 AM CDT (08:16 UTC)
Expired: Jun 22, 2020, 4:45 AM CDT
In force: 89 min
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch unlikely
Chance of a watch: 5%

Counties Beckham County, OK, Caddo County, OK, Comanche County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, Roger Mills County, OK, Tillman County, OK, Washita County, OK, Hemphill County, TX, Wheeler County, TX

The radar

The Altus AFB radar (KFDR), 95 km from the middle of the area, began a volume at 08:17 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

Norman, OK (KOUN), launched 00:00Z, 8.3 hours before the alert went out and 185 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: 42 J/kg
Mixed-layer CIN: -455 J/kg
Mixed-layer LCL: 1589 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 117 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Jun 21, 10:13 PM CDT	Mesoscale Discussion	SPC	Beckham, Caddo, Custer, Roger Mills, Washita	92 min
Jun 22, 12:42 AM CDT	Mesoscale Discussion	SPC	Carter, Coal, Cotton, Garvin, Jefferson, Johnston and 6 more	33 min
Jun 22, 3:13 PM CDT	Mesoscale Discussion	SPC	Cimarron, Roger Mills, Texas	2 hr
Jun 22, 4:00 PM CDT	Severe Thunderstorm Watch	SPC	Beaver, Cimarron, Texas	7 hr
Jun 22, 6:00 PM CDT	Mesoscale Discussion	SPC	Beckham, Cimarron, Texas	2 hr

Nearby

Mesoscale Discussions in Oklahoma, 2020 Mesoscale Discussions in Texas, 2020 Every mesoscale discussion in 2020

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.