Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 720

May 22, 2015Chaves County, Curry County, Roosevelt County, New Mexico; 12 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 22, 2015, 11:35 PM MDT for Chaves County, Curry County, Roosevelt County, New Mexico; 12 counties in Texas. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued: May 22, 2015, 11:35 PM MDT (05:35 UTC)
Expired: May 23, 2015, 1:30 AM MDT
In force: 115 min
Issued by: the Storm Prediction Center
Chance of a watch: 60%

Counties Chaves County, NM, Curry County, NM, Roosevelt County, NM, Bailey County, TX, Castro County, TX, Cochran County, TX, Deaf Smith County, TX, Hockley County, TX, Lamb County, TX, Oldham County, TX, Parmer County, TX, Potter County, TX, Randall County, TX, Swisher County, TX, Yoakum County, TX

The radar

The Cannon AFB radar (KFDX), 63 km from the middle of the area, began a volume at 05:37 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, 5.6 hours before the alert went out and 189 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: 1289 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 96 m²/s²
0-3 km storm-relative helicity: 174 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
May 22, 6:06 PM MDT	Mesoscale Discussion	SPC	Chaves, Eddy	114 min
May 23, 4:38 AM MDT	Mesoscale Discussion	SPC	Armstrong, Briscoe, Carson, Castro, Collingsworth, Donley and 9 more	97 min
May 23, 11:17 AM MDT	Mesoscale Discussion	SPC	Baylor, Briscoe, Castro, Childress, Cottle, Crosby and 17 more	2 hr
May 23, 12:16 PM MDT	Tornado Watch	SPC	Archer, Armstrong, Bailey, Baylor, Briscoe, Castro and 31 more	6 hr
May 23, 1:02 PM MDT	Mesoscale Discussion	SPC	Brewster, Coke, Concho, Crane, Crockett, Ector and 28 more	88 min
May 23, 2:04 PM MDT	Tornado Watch	SPC	Andrews, Borden, Brewster, Brown, Callahan, Coke and 49 more	6 hr
May 23, 2:44 PM MDT	Mesoscale Discussion	SPC	Archer, Bailey, Baylor, Briscoe, Castro, Childress and 27 more	2 hr
May 23, 4:04 PM MDT	Mesoscale Discussion	SPC	Archer, Baylor, Bosque, Childress, Clay, Collin and 34 more	2 hr
May 23, 4:30 PM MDT	Tornado Watch	SPC	Archer, Baylor, Briscoe, Childress, Clay, Collin and 30 more	9 hr
May 23, 5:06 PM MDT	Mesoscale Discussion	SPC	Andrews, Atascosa, Bandera, Bexar, Blanco, Borden and 61 more	114 min
May 23, 5:19 PM MDT	Tornado Watch	SPC	Atascosa, Bandera, Bastrop, Bee, Bexar, Blanco and 30 more	9 hr
May 23, 5:37 PM MDT	Mesoscale Discussion	SPC	Archer, Clay, Cooke, Denton, Grayson, Montague and 2 more	83 min

Nearby

Mesoscale Discussions in Texas, 2015 Mesoscale Discussions in New Mexico, 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.