Alert archive / Texas / Mesoscale Discussions in 2021
Mesoscale Discussion 863
The Storm Prediction Center issued this mesoscale discussion at Jun 6, 2021, 11:47 PM CDT for 14 counties in Texas. It was in force for 88 min.
The area
The outline as issued.
The facts
- Issued
- Jun 6, 2021, 11:47 PM CDT (04:47 UTC)
- Expired
- Jun 7, 2021, 1:15 AM CDT
- In force
- 88 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 240
Counties Briscoe County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Floyd County, TX, Garza County, TX, Hale County, TX, Hall County, TX, Kent County, TX, King County, TX, Lubbock County, TX, Lynn County, TX, Motley County, TX, Stonewall County, TX
The radar
The Lubbock radar (KLBB), 55 km from the middle of the area, began a volume at 04:48 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, 4.8 hours before the alert went out and 153 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
- 1369 J/kg
- Mixed-layer CIN
- -59 J/kg
- Mixed-layer LCL
- 2265 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 230 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 11.2
The text
As transmitted.
185 ACUS11 KWNS 070447 SWOMCD SPC MCD 070447 TXZ000-070615- Mesoscale Discussion 0863 NWS Storm Prediction Center Norman OK 1147 PM CDT Sun Jun 06 2021 Areas affected...Southern TX Panhandle/TX South Plains Concerning...Severe Thunderstorm Watch 240... Valid 070447Z - 070615Z The severe weather threat for Severe Thunderstorm Watch 240 continues. SUMMARY...Threat for strong wind gusts and isolated large hail will continue across the southern TX Panhandle for at the next 2 hours. DISCUSSION...Recent radar imagery has begun to show a bit quicker forward progression with the line of storms north of LBB in the southern TX Panhandle. Storm motion is still only around 20-25 kt but persistent southeasterly low-level flow and strong instability downstream suggest the potential for additional organization/strengthening remains. Thunderstorms south of LBB are organizing along the same outflow and have also recently exhibited similar forward propagating characteristics. Large hail remains possible, but the primary threat has now shifted to strong wind gusts. The downstream air mass continues to undergo nocturnal stabilization, but convective inhibition does appear weak enough to allow the ongoing storms to continue. The overall expectation is for the ongoing storms to persist for at least the next 2 hours as they move eastward across the southern TX Panhandle toward northwest TX. ..Mosier.. 06/07/2021 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...SJT...LUB...AMA...MAF... LAT...LON 34390208 34770105 34180007 32870029 32780218 34390208
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 6, 8:49 PM CDT | Mesoscale Discussion | SPC | Armstrong, Briscoe, Carson, Castro, Crosby, Dawson and 14 more | 116 min |
| Jun 6, 9:42 PM CDT | Severe Thunderstorm Watch | SPC | Armstrong, Briscoe, Carson, Castro, Childress, Collingsworth and 22 more | 6 hr |
| Jun 7, 1:37 AM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Callahan, Childress, Coleman, Cottle and 20 more | 83 min |
| Jun 7, 2:48 AM CDT | Severe Thunderstorm Watch | SPC | Archer, Baylor, Callahan, Clay, Cooke, Denton and 17 more | 7 hr |
| Jun 7, 4:12 AM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Clay, Foard, Hardeman, Haskell and 12 more | 93 min |
| Jun 7, 7:19 AM CDT | Mesoscale Discussion | SPC | Callahan, Comanche, Eastland, Erath, Hood, Johnson and 3 more | 116 min |
| Jun 7, 9:36 AM CDT | Mesoscale Discussion | SPC | Anderson, Angelina, Bosque, Cherokee, Ellis, Falls and 16 more | 2 hr |
| Jun 7, 12:32 PM CDT | Severe Thunderstorm Watch | SPC | Angelina, Bowie, Camp, Cass, Cherokee, Franklin and 24 more | 6 hr |
| Jun 7, 3:08 PM CDT | Mesoscale Discussion | SPC | Sabine, San Augustine, Shelby | 2 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.