Alert archive / Texas / Mesoscale Discussions in 2021
Mesoscale Discussion 729
The Storm Prediction Center issued this mesoscale discussion at May 24, 2021, 8:56 PM CDT for 18 counties in Texas. It was in force for 94 min.
The area
The outline as issued.
The facts
- Issued
- May 24, 2021, 8:56 PM CDT (01:56 UTC)
- Expired
- May 24, 2021, 10:30 PM CDT
- In force
- 94 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 201
Counties Borden County, TX, Briscoe County, TX, Crosby County, TX, Dawson County, TX, Dickens County, TX, Floyd County, TX, Garza County, TX, Hale County, TX, Hockley County, TX, Howard County, TX, Kent County, TX, Lamb County, TX, Lubbock County, TX, Lynn County, TX, Mitchell County, TX, Motley County, TX, Scurry County, TX, Terry County, TX
The radar
The Lubbock radar (KLBB), 27 km from the middle of the area, began a volume at 01:58 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, 1.9 hours before the alert went out and 182 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
- 507 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 2330 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- -23 m²/s²
- 0-3 km storm-relative helicity
- 2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -1.5
The text
As transmitted.
677
ACUS11 KWNS 250156
SWOMCD
SPC MCD 250156
TXZ000-250330-
Mesoscale Discussion 0729
NWS Storm Prediction Center Norman OK
0856 PM CDT Mon May 24 2021
Areas affected...west Texas
Concerning...Severe Thunderstorm Watch 201...
Valid 250156Z - 250330Z
The severe weather threat for Severe Thunderstorm Watch 201
continues.
SUMMARY...Isolated damaging wind and hail remain possible through
04Z this evening over a portion of west Texas.
DISCUSSION...Storms that developed along the dryline earlier persist
across west TX generally north and west of the Lubbock area and are
moving slowly east. These storms have been poorly organized, but
tendency has been for a gradual upscale growth. Farther south, other
storms that developed in association with an MCV are moving to the
north northwest. These two clusters of storms will likely merge
within the next hour or so, and this may contribute to some
intensification. After the merger, a strengthening low-level jet may
help to maintain a forward-propagating MCS through a portion of the
warm sector before activity begins to weaken toward late evening.
..Dial.. 05/25/2021
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...SJT...LUB...MAF...
LAT...LON 34020248 34490187 34600117 34290059 33420052 32370065
32180141 32440202 33170264 34020248SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 11:43 PM CDT | Mesoscale Discussion | SPC | Baylor, Foard, King, Knox | 2 hr |
| May 25, 12:32 PM CDT | Mesoscale Discussion | SPC | Anderson, Bowie, Camp, Cass, Cherokee, Delta and 25 more | 118 min |
| May 25, 2:02 PM CDT | Mesoscale Discussion | SPC | Brewster, Crane, Pecos, Terrell, Upton, Ward | 118 min |
| May 25, 2:56 PM CDT | Mesoscale Discussion | SPC | Armstrong, Borden, Briscoe, Carson, Crosby, Dawson and 15 more | 94 min |
| May 25, 4:08 PM CDT | Severe Thunderstorm Watch | SPC | Armstrong, Borden, Briscoe, Callahan, Carson, Castro and 54 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.