Alert archive / Oklahoma / Mesoscale Discussions in 2019

Mesoscale Discussion 920

June 1, 201915 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Jun 1, 2019, 11:49 AM CDT for 15 counties in Oklahoma. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: Jun 1, 2019, 11:49 AM CDT (16:49 UTC)
Expired: Jun 1, 2019, 1:45 PM CDT
In force: 116 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Comanche County, OK, Custer County, OK, Dewey County, OK, Grady County, OK, Greer County, OK, Kingfisher County, OK, Kiowa County, OK, Major County, OK, McClain County, OK, Roger Mills County, OK, Washita County, OK

The radar

The Altus AFB radar (KFDR), 124 km from the middle of the area, began a volume at 16:52 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

Amarillo Airport, TX (KAMA), launched 12:00Z, 4.8 hours before the alert went out and 245 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: 1470 J/kg
Mixed-layer CIN: -116 J/kg
Mixed-layer LCL: 1268 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 54 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

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 1, 1:32 PM CDT	Mesoscale Discussion	SPC	Cimarron	118 min
Jun 1, 1:53 PM CDT	Mesoscale Discussion	SPC	Cotton, Jackson, Tillman	97 min
Jun 1, 1:53 PM CDT	Severe Thunderstorm Watch	SPC	Beaver, Cimarron, Texas	9 hr

Nearby

Mesoscale Discussions in Oklahoma, 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.