Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 282

April 11, 201513 counties in Kansas; 7 counties in Oklahoma; 19 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 11, 2015, 8:19 PM CDT for 13 counties in Kansas; 7 counties in Oklahoma; 19 counties in Texas. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued: Apr 11, 2015, 8:19 PM CDT (01:19 UTC)
Expired: Apr 11, 2015, 9:15 PM CDT
In force: 56 min
Issued by: the Storm Prediction Center

All 39 counties

Barber County, KS, Clark County, KS, Comanche County, KS, Edwards County, KS, Ford County, KS, Grant County, KS, Gray County, KS, Haskell County, KS, Kiowa County, KS, Meade County, KS, Pratt County, KS, Seward County, KS, Stevens County, KS, Beaver County, OK, Ellis County, OK, Harper County, OK, Roger Mills County, OK, Texas County, OK, Woods County, OK, Woodward County, OK, Armstrong County, TX, Briscoe County, TX, Carson County, TX, Childress County, TX, Collingsworth County, TX, Crosby County, TX, Dickens County, TX, Donley County, TX, Floyd County, TX, Gray County, TX, Hall County, TX, Hansford County, TX, Hemphill County, TX, Hutchinson County, TX, Lipscomb County, TX, Motley County, TX, Ochiltree County, TX, Roberts County, TX, Wheeler County, TX

The radar

The Dodge City radar (KDDC), 167 km from the middle of the area, began a volume at 01:21 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

Dodge City, (KDDC), launched 00:00Z, 1.3 hours before the alert went out and 169 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1269 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 12, 5:03 PM CDT	Mesoscale Discussion	SPC	Barber, Comanche, Harper, Kingman, Kiowa, Pratt and 2 more	57 min
Apr 12, 5:17 PM CDT	Severe Thunderstorm Watch	SPC	Barber, Barton, Butler, Clark, Comanche, Cowley and 13 more	7 hr
Apr 12, 5:42 PM CDT	Mesoscale Discussion	SPC	Clay, Cloud, Ellis, Ellsworth, Jewell, Lincoln and 11 more	63 min
Apr 12, 5:05 PM CDT	Mesoscale Discussion	SPC	Andrews, Borden, Crane, Crockett, Dawson, Ector and 15 more	115 min
Apr 12, 5:39 PM CDT	Mesoscale Discussion	SPC	Atascosa, Bandera, Bee, Bexar, Brooks, Dimmit and 20 more	2 hr
Apr 12, 5:59 PM CDT	Severe Thunderstorm Watch	SPC	Atascosa, Bandera, Brooks, Cameron, Crockett, Dimmit and 28 more	7 hr

Nearby

Mesoscale Discussions in Texas, 2015 Mesoscale Discussions in Kansas, 2015 Mesoscale Discussions in Oklahoma, 2015 Every mesoscale discussion in 2015

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.