Alert archive / Texas / Mesoscale Discussions in 2016

Mesoscale Discussion 614

May 11, 20166 counties in Oklahoma; 10 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 11, 2016, 10:13 PM CDT for 6 counties in Oklahoma; 10 counties in Texas. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: May 11, 2016, 10:13 PM CDT (03:13 UTC)
Expired: May 11, 2016, 11:45 PM CDT
In force: 92 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

Counties Beckham County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, Tillman County, OK, Armstrong County, TX, Childress County, TX, Collingsworth County, TX, Donley County, TX, Gray County, TX, Hall County, TX, Hardeman County, TX, Wheeler County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 99 km from the middle of the area, began a volume at 03:14 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 00:00Z, 3.2 hours before the alert went out and 168 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: 20 J/kg
Mixed-layer CIN: -141 J/kg
Mixed-layer LCL: 1912 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 207 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 11, 8:11 PM CDT	Mesoscale Discussion	SPC	Adair, Atoka, Bryan, Carter, Cherokee, Cleveland and 33 more	3 hr
May 11, 10:13 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Carter, Cherokee, Choctaw, Cleveland, Coal and 21 more	7 hr
May 11, 11:46 PM CDT	Mesoscale Discussion	SPC	Atoka, Carter, Coal, Garvin, Haskell, Hughes and 10 more	119 min
May 12, 2:12 AM CDT	Mesoscale Discussion	SPC	Carter, Comanche, Cotton, Jefferson, Stephens, Tillman	93 min
May 12, 2:48 AM CDT	Mesoscale Discussion	SPC	Choctaw, LeFlore, McCurtain, Pushmataha	87 min
May 11, 7:11 PM CDT	Mesoscale Discussion	SPC	Callahan, Eastland, Erath, Fisher, Haskell, Hood and 13 more	94 min
May 11, 9:52 PM CDT	Mesoscale Discussion	SPC	Brown, Callahan, Coleman, Comanche, Eastland, Erath and 15 more	53 min
May 11, 10:55 PM CDT	Severe Thunderstorm Watch	SPC	Brown, Callahan, Coke, Coleman, Fisher, Jones and 4 more	6 hr
May 12, 3:35 AM CDT	Mesoscale Discussion	SPC	Brown, Callahan, Coleman, Comanche, Eastland, Erath and 9 more	85 min

Nearby

Mesoscale Discussions in Texas, 2016 Mesoscale Discussions in Oklahoma, 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.