Alert archive / Oklahoma / Mesoscale Discussions in 2020

Mesoscale Discussion 964

June 22, 202012 counties in Oklahoma; 5 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 22, 2020, 12:42 AM CDT for 12 counties in Oklahoma; 5 counties in Texas. It was in force for 33 min.

The area

The outline as issued.

The facts

Issued: Jun 22, 2020, 12:42 AM CDT (05:42 UTC)
Expired: Jun 22, 2020, 1:15 AM CDT
In force: 33 min
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 293

Counties Carter County, OK, Coal County, OK, Cotton County, OK, Garvin County, OK, Jefferson County, OK, Johnston County, OK, Love County, OK, Marshall County, OK, Murray County, OK, Pontotoc County, OK, Seminole County, OK, Stephens County, OK, Archer County, TX, Clay County, TX, Cooke County, TX, Montague County, TX, Wichita County, TX

The radar

The Norman radar (KTLX), 124 km from the middle of the area, began a volume at 05:43 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, 5.7 hours before the alert went out and 110 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, 3:16 AM CDT	Mesoscale Discussion	SPC	Beckham, Caddo, Comanche, Greer, Harmon, Jackson and 4 more	89 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.