Alert archive / Texas / Mesoscale Discussions in 2021
Mesoscale Discussion 739
The Storm Prediction Center issued this mesoscale discussion at May 25, 2021, 7:21 PM CDT for 39 counties in Texas. It was in force for 84 min.
The area
The outline as issued.
The facts
- Issued
- May 25, 2021, 7:21 PM CDT (00:21 UTC)
- Expired
- May 25, 2021, 8:45 PM CDT
- In force
- 84 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 204
All 39 counties
Armstrong County, TX, Borden County, TX, Briscoe County, TX, Carson County, TX, Childress County, TX, Coke County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Donley County, TX, Fisher County, TX, Floyd County, TX, Garza County, TX, Glasscock County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hemphill County, TX, Howard County, TX, Hutchinson County, TX, Jones County, TX, Kent County, TX, King County, TX, Lipscomb County, TX, Lubbock County, TX, Lynn County, TX, Midland County, TX, Mitchell County, TX, Motley County, TX, Nolan County, TX, Ochiltree County, TX, Roberts County, TX, Scurry County, TX, Sterling County, TX, Stonewall County, TX, Swisher County, TX, Taylor County, TX, Wheeler County, TX
The radar
The Lubbock radar (KLBB), 65 km from the middle of the area, began a volume at 00:23 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
Amarillo Airport, TX (KAMA), launched 00:00Z, 0.4 hours before the alert went out and 171 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.
- Mixed-layer CAPE
- 1499 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 1874 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 95 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.8
The text
As transmitted.
151
ACUS11 KWNS 260021
SWOMCD
SPC MCD 260021
OKZ000-TXZ000-260145-
Mesoscale Discussion 0739
NWS Storm Prediction Center Norman OK
0721 PM CDT Tue May 25 2021
Areas affected...west Texas through a portion of the Oklahoma
Panhandle
Concerning...Severe Thunderstorm Watch 204...
Valid 260021Z - 260145Z
The severe weather threat for Severe Thunderstorm Watch 204
continues.
SUMMARY...Isolated damaging wind and large hail remain possible
through mid evening across portions of west Texas. The greatest
coverage of severe storms will probably persist with a cluster near
Sweetwater. Additional storms might develop across a portion of the
Texas and Oklahoma panhandles.
DISCUSSION...Early this evening the greatest coverage of storms
persist over the southern portions of west TX near Sweetwater and
this activity will pose a threat for damaging wind and large hail as
it continues slowly east during the next couple of hours. Farther
north orphaned anvils are evident west of the Lubbock area where
attempts at initiation occurred along the dryline. However, with
loss of diabatic heating and only weak forcing along the retreating
dryline, confidence in storm development is low for this area. An
isolated, weakening supercell persists across the Panhandle just
west of Amarillo. Additional storms are possible along a
southwest-northeast oriented front from the northern part of the
Texas Panhandle into the eastern Oklahoma Panhandle during the next
couple of hours.
..Dial.. 05/26/2021
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...OUN...SJT...LUB...AMA...MAF...
LAT...LON 31720209 32540182 33810220 34520207 35220178 36360104
36879979 34920003 33559991 32269979 31680082 31720209SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 25, 10:10 PM CDT | Mesoscale Discussion | SPC | Armstrong, Briscoe, Callahan, Carson, Childress, Collingsworth and 27 more | 65 min |
| May 26, 12:43 AM CDT | Mesoscale Discussion | SPC | Armstrong, Briscoe, Childress, Collingsworth, Cottle, Donley and 3 more | 92 min |
| May 26, 3:24 PM CDT | Mesoscale Discussion | SPC | Armstrong, Bailey, Briscoe, Carson, Castro, Childress and 25 more | 96 min |
| May 26, 5:13 PM CDT | Tornado Watch | SPC | Armstrong, Bailey, Briscoe, Carson, Castro, Collingsworth and 20 more | 7 hr |
Nearby
Mesoscale Discussions in Texas, 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.