Alert archive / Texas / Mesoscale Discussions in 2020
Mesoscale Discussion 976
The Storm Prediction Center issued this mesoscale discussion at Jun 22, 2020, 11:24 PM CDT for 8 counties in Oklahoma; 39 counties in Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 22, 2020, 11:24 PM CDT (04:24 UTC)
- Expired
- Jun 23, 2020, 1:30 AM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 296
All 47 counties
Beckham County, OK, Cotton County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, Roger Mills County, OK, Tillman County, OK, Archer County, TX, Bailey County, TX, Baylor County, TX, Borden County, TX, Briscoe County, TX, Childress County, TX, Clay County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Dawson County, TX, Dickens County, TX, Donley County, TX, Fisher County, TX, Floyd County, TX, Foard County, TX, Garza County, TX, Hale County, TX, Hall County, TX, Hardeman County, TX, Haskell County, TX, Hockley County, TX, Howard County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Lamb County, TX, Lubbock County, TX, Lynn County, TX, Mitchell County, TX, Motley County, TX, Scurry County, TX, Stonewall County, TX, Swisher County, TX, Throckmorton County, TX, Wheeler County, TX, Wichita County, TX, Wilbarger County, TX
The radar
The Lubbock radar (KLBB), 89 km from the middle of the area, began a volume at 04:24 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, 4.4 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.
- Mixed-layer CAPE
- 1588 J/kg
- Mixed-layer CIN
- -89 J/kg
- Mixed-layer LCL
- 1913 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 277 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 11.1
The text
As transmitted.
470 ACUS11 KWNS 230425 SWOMCD SPC MCD 230424 TXZ000-OKZ000-230630- Mesoscale Discussion 0976 NWS Storm Prediction Center Norman OK 1124 PM CDT Mon Jun 22 2020 Areas affected...West Texas...Southwestern Oklahoma Concerning...Severe Thunderstorm Watch 296... Valid 230424Z - 230630Z The severe weather threat for Severe Thunderstorm Watch 296 continues. SUMMARY...Severe threat will spread across the southern portions of watch 296 over the next several hours. Some consideration may be needed to expand ww296 across northern portions of MAF CWA. DISCUSSION...MCS has gradually expanded in areal coverage over the southeastern TX Panhandle into the TX South Plains. While a significant cold pool has developed in association with this complex, forward speed remains near 35kt. Greatest risk of damaging winds continues along the leading edge of the squall line, and there is some possibility for strengthening as this convection encounters increasingly moist environment. Additionally, with the LLJ focused across the Edwards Plateau into southeast NM, ongoing storms near MAF may linger while a decidedly southward motion persists along the western flank of the MCS. ..Darrow.. 06/23/2020 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...FWD...OUN...SJT...LUB...AMA...MAF... LAT...LON 34070287 35919941 33759797 31900143 34070287
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 22, 8:21 PM CDT | Mesoscale Discussion | SPC | Beckham, Greer, Harmon, Jackson, Kiowa, Tillman | 84 min |
| Jun 22, 9:06 PM CDT | Severe Thunderstorm Watch | SPC | Beckham, Caddo, Comanche, Cotton, Custer, Dewey and 8 more | 8 hr |
| Jun 23, 1:16 AM CDT | Mesoscale Discussion | SPC | Archer, Borden, Brown, Callahan, Clay, Coke and 28 more | 89 min |
| Jun 23, 1:33 AM CDT | Severe Thunderstorm Watch | SPC | Bosque, Brown, Callahan, Coke, Coleman, Collin and 36 more | 6 hr |
| Jun 23, 3:55 AM CDT | Mesoscale Discussion | SPC | Bosque, Brown, Collin, Comanche, Coryell, Dallas and 18 more | 95 min |
Nearby
Mesoscale Discussions in Texas, 2020Mesoscale Discussions in Oklahoma, 2020Every mesoscale discussion in 2020
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.