Alert archive / Texas / Mesoscale Discussions in 2016

Mesoscale Discussion 635

May 16, 201611 counties in Oklahoma; 13 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 16, 2016, 7:23 PM CDT for 11 counties in Oklahoma; 13 counties in Texas. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued
May 16, 2016, 7:23 PM CDT (00:23 UTC)
Expired
May 16, 2016, 8:30 PM CDT
In force
67 min
Issued by
the Storm Prediction Center
All 24 counties

Beckham County, OK, Blaine County, OK, Caddo County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Greer County, OK, Kingfisher County, OK, Kiowa County, OK, Roger Mills County, OK, Washita County, OK, Carson County, TX, Collingsworth County, TX, Gray County, TX, Hansford County, TX, Hartley County, TX, Hemphill County, TX, Hutchinson County, TX, Lipscomb County, TX, Moore County, TX, Ochiltree County, TX, Potter County, TX, Roberts County, TX, Wheeler County, TX

The radar

The Amarillo radar (KAMA), 82 km from the middle of the area, began a volume at 00:22 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.

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 0.4 hours before the alert went out and 81 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-pSkew-T log-p diagram, Amarillo Airport, TX at 00:00Z on 2016-05-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1214 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Amarillo Airport, TX at 00:00Z on 2016-05-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 240 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
1214 J/kg
Mixed-layer CIN
-133 J/kg
Mixed-layer LCL
1620 m above ground
0-6 km bulk shear
69 kt
0-1 km storm-relative helicity
240 m²/s²
0-3 km storm-relative helicity
349 m²/s²
Significant tornado parameter
0.3
Supercell composite
16.5

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.

IssuedProductOfficeCountiesLasted
May 16, 8:59 PM CDTSevere Thunderstorm WatchSPCBeckham, Blaine, Caddo, Canadian, Carter, Cleveland and 24 more6 hr
May 16, 9:59 PM CDTMesoscale DiscussionSPCBeckham, Roger Mills31 min
May 16, 11:53 PM CDTMesoscale DiscussionSPCCaddo, Canadian, Cleveland, Garvin, Grady, McClain and 1 more67 min
May 17, 2:08 AM CDTMesoscale DiscussionSPCCarter, Comanche, Cotton, Garvin, Jefferson, Johnston and 9 more2 hr
May 16, 11:58 PM CDTSevere Thunderstorm WatchSPCArcher, Baylor, Briscoe, Childress, Clay, Cottle and 7 more5 hr
May 17, 1:52 PM CDTMesoscale DiscussionSPCBandera, Crane, Crockett, Edwards, Irion, Kerr and 8 more113 min
May 17, 2:25 PM CDTSevere Thunderstorm WatchSPCAtascosa, Bandera, Bexar, Blanco, Brewster, Comal and 34 more13 hr
May 17, 5:18 PM CDTMesoscale DiscussionSPCBee, Duval, Jim Wells, Live Oak, Webb57 min
May 17, 5:38 PM CDTMesoscale DiscussionSPCBandera, Crockett, Dimmit, Edwards, Frio, Gillespie and 17 more97 min
May 17, 6:20 PM CDTSevere Thunderstorm WatchSPCBrooks, Duval, Hidalgo, Jim Hogg, La Salle, McMullen and 3 more5 hr

Nearby

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