Alert archive / Oklahoma / Mesoscale Discussions in 2016

Mesoscale Discussion 691

May 23, 20168 counties in Oklahoma; 8 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 23, 2016, 1:36 AM CDT for 8 counties in Oklahoma; 8 counties in Texas. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: May 23, 2016, 1:36 AM CDT (06:36 UTC)
Expired: May 23, 2016, 3:00 AM CDT
In force: 84 min
Issued by: the Storm Prediction Center

Counties Carter County, OK, Comanche County, OK, Cotton County, OK, Jefferson County, OK, Love County, OK, Marshall County, OK, Stephens County, OK, Tillman County, OK, Archer County, TX, Clay County, TX, Cooke County, TX, Denton County, TX, Grayson County, TX, Montague County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 97 km from the middle of the area, began a volume at 06:40 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 198May 23, 2:15 AM CDT

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 6.6 hours before the alert went out and 139 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: 1646 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 1187 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 65 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 4.7

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 22, 7:02 PM CDT	Mesoscale Discussion	SPC	Beaver	118 min
May 22, 7:46 PM CDT	Mesoscale Discussion	SPC	Comanche, Greer, Jackson, Kiowa, Tillman	89 min
May 22, 8:48 PM CDT	Severe Thunderstorm Watch	SPC	Comanche, Cotton, Greer, Harmon, Jackson, Jefferson and 3 more	5 hr
May 22, 9:10 PM CDT	Mesoscale Discussion	SPC	Beaver	65 min
May 23, 2:15 AM CDT	Severe Thunderstorm Watch	SPC	Carter, Cotton, Jackson, Jefferson, Love, Marshall and 2 more	5 hr
May 23, 4:58 AM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Choctaw, Jefferson, Love, Marshall and 1 more	62 min
May 23, 2:18 PM CDT	Mesoscale Discussion	SPC	Beckham, Dewey, Ellis, Harmon, Harper, Major and 3 more	117 min
May 23, 3:37 PM CDT	Tornado Watch	SPC	Beaver, Beckham, Custer, Dewey, Ellis, Greer and 9 more	8 hr
May 23, 6:08 PM CDT	Mesoscale Discussion	SPC	Beaver, Beckham, Custer, Dewey, Ellis, Greer and 9 more	2 hr
May 22, 9:35 PM CDT	Mesoscale Discussion	SPC	Irion, Reagan	85 min
May 23, 1:32 PM CDT	Mesoscale Discussion	SPC	Borden, Coke, Crockett, Crosby, Dawson, Garza and 15 more	118 min
May 23, 2:32 PM CDT	Tornado Watch	SPC	Borden, Brewster, Briscoe, Childress, Coke, Cottle and 37 more	7 hr
May 23, 5:29 PM CDT	Mesoscale Discussion	SPC	Borden, Briscoe, Coke, Cottle, Crockett, Crosby and 30 more	91 min

Nearby

Mesoscale Discussions in Oklahoma, 2016 Mesoscale Discussions in Texas, 2016 Every mesoscale discussion in 2016

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.