Alert archive / Texas / Mesoscale Discussions in 2021

Mesoscale Discussion 818

May 30, 2021Lea County, New Mexico; 26 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 30, 2021, 8:22 PM MDT for Lea County, New Mexico; 26 counties in Texas. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued
May 30, 2021, 8:22 PM MDT (02:22 UTC)
Expired
May 30, 2021, 9:45 PM MDT
In force
83 min
Issued by
the Storm Prediction Center
Concerning
Severe thunderstorm watch 227
All 27 counties

Lea County, NM, Andrews County, TX, Borden County, TX, Cochran County, TX, Cottle County, TX, Crosby County, TX, Dawson County, TX, Dickens County, TX, Fisher County, TX, Floyd County, TX, Gaines County, TX, Garza County, TX, Hale County, TX, Hall County, TX, Hockley County, TX, Howard County, TX, Kent County, TX, King County, TX, Lamb County, TX, Lubbock County, TX, Lynn County, TX, Martin County, TX, Motley County, TX, Scurry County, TX, Stonewall County, TX, Terry County, TX, Yoakum County, TX

The radar

The Lubbock radar (KLBB), 37 km from the middle of the area, began a volume at 02:23 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

Midland Regional, TX (KMAF), launched 00:00Z, 2.4 hours before the alert went out and 157 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, Midland Regional, TX at 00:00Z on 2021-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 43 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, Midland Regional, TX at 00:00Z on 2021-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -20 square meters per square second.19395878Sfc1 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
43 J/kg
Mixed-layer CIN
-343 J/kg
Mixed-layer LCL
1626 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
-20 m²/s²
0-3 km storm-relative helicity
35 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

As transmitted.

732 
ACUS11 KWNS 310222
SWOMCD
SPC MCD 310222 
TXZ000-NMZ000-310345-

Mesoscale Discussion 0818
NWS Storm Prediction Center Norman OK
0922 PM CDT Sun May 30 2021

Areas affected...portions of far southeast New Mexico into west
Texas

Concerning...Severe Thunderstorm Watch 227...

Valid 310222Z - 310345Z

The severe weather threat for Severe Thunderstorm Watch 227
continues.

SUMMARY...The severe threat continues across Severe Thunderstorm
Watch 227. Large hail may continue with the more discrete storms as
damaging gust potential increases with line segments that develop.

DISCUSSION...Multicellular clusters and transient supercells (some
with a history of producing marginally severe hail along the TX/NM
border) are ongoing across western portions of Severe Thunderstorm
Watch 227. Some severe hail may continue to accompany the stronger,
more discrete storms for a couple more hours given the availability
of 1000+ J/kg MLCAPE across the Cap Rock/Rolling Plains. Though
convective inhibition has been slowly increasing with the onset of
nocturnal cooling, cold pool mergers and resultant upscale growth
may compensate to support a damaging gust threat through the
evening.

..Squitieri/Guyer.. 05/31/2021

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...OUN...SJT...LUB...MAF...ABQ...

LAT...LON   32620457 33810314 34320222 34580092 34380017 33889996
            33230010 32640044 32330110 32150299 32620457

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 31, 8:18 AM MDTMesoscale DiscussionSPCChaves, Curry, De Baca, Lincoln, Roosevelt57 min
May 31, 10:33 AM MDTMesoscale DiscussionSPCChaves, De Baca, Eddy, Lea, Lincoln, Roosevelt and 1 more87 min
May 31, 11:16 AM MDTSevere Thunderstorm WatchSPCChaves, Eddy, Lea, Lincoln, Socorro9 hr
May 31, 12:47 PM MDTMesoscale DiscussionSPCBernalillo, Cibola, Los Alamos, McKinley, Rio Arriba, Sandoval and 3 more88 min
May 31, 2:29 PM MDTMesoscale DiscussionSPCChaves, Eddy, Lea, Lincoln, Socorro91 min
May 31, 5:17 PM MDTMesoscale DiscussionSPCOtero88 min
May 30, 7:59 PM MDTMesoscale DiscussionSPCCarson, Gray, Hansford, Hemphill, Hutchinson, Lipscomb and 6 more91 min
May 30, 8:17 PM MDTSevere Thunderstorm WatchSPCArmstrong, Carson, Collingsworth, Donley, Gray, Hemphill and 4 more5 hr
May 30, 10:43 PM MDTMesoscale DiscussionSPCBailey, Cochran, Cottle, Crosby, Dickens, Floyd and 12 more92 min
May 31, 1:12 AM MDTMesoscale DiscussionSPCBorden, Fisher, Haskell, Howard, Jones, Kent and 5 more3 hr
May 31, 1:15 PM MDTMesoscale DiscussionSPCBosque, Brown, Callahan, Coleman, Comanche, Coryell and 10 more2 hr
May 31, 1:54 PM MDTSevere Thunderstorm WatchSPCBell, Bosque, Comanche, Coryell, Ellis, Erath and 13 more4 hr
May 31, 4:12 PM MDTMesoscale DiscussionSPCBell, Bosque, Coryell, Ellis, Falls, Freestone and 10 more93 min
May 31, 4:49 PM MDTMesoscale DiscussionSPCBrewster, Pecos, Terrell116 min

Nearby

Mesoscale Discussions in Texas, 2021Mesoscale Discussions in New Mexico, 2021Every mesoscale discussion in 2021

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.