Alert archive / Texas / Mesoscale Discussions in 2024

Mesoscale Discussion 521

April 26, 2024Jackson County, Oklahoma; 25 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 26, 2024, 12:30 AM CDT for Jackson County, Oklahoma; 25 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Apr 26, 2024, 12:30 AM CDT (05:30 UTC)
Expired
Apr 26, 2024, 2:30 AM CDT
In force
2 hr
Issued by
the Storm Prediction Center
Concerning
Severe thunderstorm watch 135
All 26 counties

Jackson County, OK, Baylor County, TX, Borden County, TX, Cottle County, TX, Dawson County, TX, Dickens County, TX, Fisher County, TX, Foard County, TX, Garza County, TX, Glasscock County, TX, Hardeman County, TX, Haskell County, TX, Howard County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Martin County, TX, Midland County, TX, Mitchell County, TX, Nolan County, TX, Scurry County, TX, Sterling County, TX, Stonewall County, TX, Taylor County, TX, Throckmorton County, TX

The radar

The Lubbock radar (KLBB), 125 km from the middle of the area, began a volume at 05:30 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, 5.5 hours before the alert went out and 161 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 2024-04-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 488 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 2024-04-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 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
488 J/kg
Mixed-layer CIN
-76 J/kg
Mixed-layer LCL
2396 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
40 m²/s²
0-3 km storm-relative helicity
123 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.3

Open this sounding in Storm Lab

The text

As transmitted.

494 
ACUS11 KWNS 260531
SWOMCD
SPC MCD 260530 
TXZ000-OKZ000-260730-

Mesoscale Discussion 0521
NWS Storm Prediction Center Norman OK
1230 AM CDT Fri Apr 26 2024

Areas affected...Texas South Plains and Northwest Texas vicinity

Concerning...Severe Thunderstorm Watch 135...

Valid 260530Z - 260730Z

The severe weather threat for Severe Thunderstorm Watch 135
continues.

SUMMARY...Severe risk continues across WW 135.

DISCUSSION...A cluster of strong/severe storms is currently moving
across the Texas South Plains region, per recent radar composite
loop.  The convection -- within a zone of QG ascent associated with
a subtle short-wave trough moving out of eastern New Mexico -- is
forecast to continue advancing northeastward across Northwest Texas
toward the Red River Valley.

Abundant (in excess of 2000 J/kg) CAPE is present across this area,
atop a weakly stable boundary layer.  This, along with sufficient
cloud-layer shear for organized/severe storms, suggests that risk
for large hail will continue over the next several hours.  Locally
damaging wind gusts will also be possible, particularly if
convection expands to form an organized cold pool.

..Goss.. 04/26/2024

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

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

LAT...LON   31800227 32860192 34390035 34969944 33259906 32139978
            31660179 31800227

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 25, 7:42 PM CDTMesoscale DiscussionSPCBeaver, Texas2 hr
Apr 25, 9:36 PM CDTSevere Thunderstorm WatchSPCHarmon, Jackson, Tillman6 hr
Apr 26, 2:43 AM CDTMesoscale DiscussionSPCCaddo, Carter, Cleveland, Comanche, Cotton, Garvin and 9 more2 hr
Apr 26, 3:27 AM CDTSevere Thunderstorm WatchSPCAtoka, Bryan, Carter, Cleveland, Coal, Comanche and 14 more6 hr
Apr 26, 5:12 AM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Coal, Creek, Hughes and 12 more93 min
Apr 26, 5:33 AM CDTTornado WatchSPCAdair, Cherokee, Craig, Creek, Delaware, Haskell and 14 more5 hr
Apr 26, 7:35 AM CDTMesoscale DiscussionSPCAdair, Cherokee, Delaware, Haskell, Latimer, LeFlore and 5 more115 min
Apr 26, 10:12 AM CDTTornado WatchSPCMcCurtain8 hr
Apr 26, 12:53 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Coal, Creek and 25 more2 hr
Apr 26, 2:12 PM CDTTornado WatchSPCAdair, Atoka, Bryan, Carter, Cherokee, Choctaw and 33 more6 hr
Apr 26, 5:13 PM CDTMesoscale DiscussionSPCMcCurtain92 min
Apr 25, 9:19 PM CDTMesoscale DiscussionSPCAndrews, Archer, Baylor, Borden, Cottle, Crosby and 30 more86 min
Apr 26, 9:33 AM CDTMesoscale DiscussionSPCAnderson, Bosque, Bowie, Camp, Cass, Cherokee and 41 more2 hr
Apr 26, 1:56 PM CDTMesoscale DiscussionSPCEllis, Gregg, Henderson, Hill, Kaufman, McLennan and 6 more2 hr
Apr 26, 5:58 PM CDTTornado WatchSPCAnderson, Bowie, Camp, Cass, Franklin, Gregg and 12 more5 hr

Nearby

Mesoscale Discussions in Texas, 2024Mesoscale Discussions in Oklahoma, 2024Every mesoscale discussion in 2024

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.