Alert archive / Texas / Mesoscale Discussions in 2021
Mesoscale Discussion 1118
The Storm Prediction Center issued this mesoscale discussion at Jun 26, 2021, 10:13 PM CDT for 7 counties in Oklahoma; 24 counties in Texas. It was in force for 92 min.
The area
The outline as issued.
The facts
- Issued
- Jun 26, 2021, 10:13 PM CDT (03:13 UTC)
- Expired
- Jun 26, 2021, 11:45 PM CDT
- In force
- 92 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 323...324
All 31 counties
Comanche County, OK, Cotton County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, Tillman County, OK, Baylor County, TX, Borden County, TX, Childress County, TX, Cottle County, TX, Crosby County, TX, Dawson County, TX, Dickens County, TX, Fisher County, TX, Floyd County, TX, Foard County, TX, Garza County, TX, Hall County, TX, Hardeman County, TX, Haskell County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Lynn County, TX, Motley County, TX, Scurry County, TX, Stonewall County, TX, Wichita County, TX, Wilbarger County, TX
The radar
The Lubbock radar (KLBB), 129 km from the middle of the area, began a volume at 03:15 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, 3.2 hours before the alert went out and 219 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
- 667 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 1505 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- -64 m²/s²
- 0-3 km storm-relative helicity
- -4 m²/s²
- Significant tornado parameter
- -0.1
- Supercell composite
- -1.2
The text
As transmitted.
526 ACUS11 KWNS 270313 SWOMCD SPC MCD 270313 OKZ000-TXZ000-270445- Mesoscale Discussion 1118 NWS Storm Prediction Center Norman OK 1013 PM CDT Sat Jun 26 2021 Areas affected...Northwest TX...Southwest OK Concerning...Severe Thunderstorm Watch 323...324... Valid 270313Z - 270445Z The severe weather threat for Severe Thunderstorm Watch 323, 324 continues. SUMMARY...Isolated severe wind gusts and large hail remain possible across northwest Texas into southwestern Oklahoma. A temporal extension of the watch may be warranted after 04z. DISCUSSION...Maturation of a larger MCS is likely underway as eastern NM High Plains convection digs southeast toward the old synoptic frontal zone draped across northwest TX/southwest OK. Several measured severe wind gusts have been observed with the squall line has it surged into the TX south Plains over the last few hours. Of particular note is the expanding convective complex from BPG-CDS-LBB. Increasing 1km AGL flow into the frontal zone should encourage upscale growth over the next few hours. With time this activity should propagate downstream into southwestern OK. Isolated wind/hail remain possible, but very heavy rain, possibly prolonged, may ultimately be the main meteorologic concern. ..Darrow.. 06/27/2021 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...OUN...SJT...LUB...AMA...MAF... LAT...LON 32530221 34310124 35319877 34369792 32370017 32530221
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 26, 7:54 PM CDT | Mesoscale Discussion | SPC | Bailey, Castro, Cochran, Deaf Smith, Hockley, Lamb and 1 more | 96 min |
| Jun 27, 1:18 PM CDT | Mesoscale Discussion | SPC | El Paso, Hudspeth | 117 min |
Nearby
Mesoscale Discussions in Texas, 2021Mesoscale Discussions in Oklahoma, 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.