Alert archive / Texas / Mesoscale Discussions in 2020

Mesoscale Discussion 683

May 23, 20204 counties in Oklahoma; 36 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 23, 2020, 2:18 PM CDT for 4 counties in Oklahoma; 36 counties in Texas. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued
May 23, 2020, 2:18 PM CDT (19:18 UTC)
Expired
May 23, 2020, 4:15 PM CDT
In force
117 min
Issued by
the Storm Prediction Center
Concerning
Severe potential...watch likely
Chance of a watch
80%
All 40 counties

Beaver County, OK, Ellis County, OK, Harper County, OK, Roger Mills County, OK, Armstrong County, TX, Borden County, TX, Briscoe County, TX, Carson County, TX, Castro County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Dawson County, TX, Dickens County, TX, Donley County, TX, Floyd County, TX, Gaines County, TX, Garza County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hansford County, TX, Hemphill County, TX, Hockley County, TX, Hutchinson County, TX, Kent County, TX, King County, TX, Lamb County, TX, Lipscomb County, TX, Lubbock County, TX, Lynn County, TX, Motley County, TX, Ochiltree County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Swisher County, TX, Terry County, TX, Wheeler County, TX

The radar

The Amarillo radar (KAMA), 86 km from the middle of the area, began a volume at 19:18 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 12:00Z, 7.3 hours before the alert went out and 85 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 12:00Z on 2020-05-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 12:00Z on 2020-05-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 131 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2554 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
131 m²/s²
0-3 km storm-relative helicity
140 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 22, 7:00 PM CDTSevere Thunderstorm WatchSPCAtoka, Bryan, Caddo, Carter, Cleveland, Coal and 16 more8 hr
May 22, 7:17 PM CDTMesoscale DiscussionSPCAdair, Cherokee, Choctaw, Haskell, Latimer, LeFlore and 8 more58 min
May 22, 7:34 PM CDTSevere Thunderstorm WatchSPCChoctaw, Haskell, Latimer, LeFlore, McCurtain, Pittsburg and 2 more8 hr
May 22, 9:14 PM CDTMesoscale DiscussionSPCHaskell, Latimer, LeFlore, Pittsburg, Sequoyah91 min
May 22, 9:26 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Caddo, Carter, Cleveland, Coal and 16 more2 hr
May 22, 11:56 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Coal, Comanche and 18 more2 hr
May 23, 3:06 PM CDTSevere Thunderstorm WatchSPCBeaver, Beckham, Ellis, Greer, Harmon, Jackson and 1 more7 hr
May 23, 5:25 PM CDTMesoscale DiscussionSPCBeaver, Beckham, Ellis, Greer, Harmon, Jackson and 1 more2 hr
May 22, 7:16 PM CDTMesoscale DiscussionSPCCoke, Crockett, Fisher, Irion, Jones, Mitchell and 6 more2 hr
May 23, 2:12 PM CDTMesoscale DiscussionSPCBrewster, Coke, Crane, Crockett, Ector, Glasscock and 10 more93 min
May 23, 2:29 PM CDTSevere Thunderstorm WatchSPCBorden, Brewster, Coke, Crane, Crockett, Dawson and 19 more8 hr

Nearby

Mesoscale Discussions in Texas, 2020Mesoscale Discussions in Oklahoma, 2020Every mesoscale discussion in 2020

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.