Alert archive / Texas / Mesoscale Discussions in 2021
Mesoscale Discussion 1904
The Storm Prediction Center issued this mesoscale discussion at Oct 26, 2021, 5:40 PM CDT for 5 counties in Oklahoma; 18 counties in Texas. It was in force for 65 min.
The area
The outline as issued.
The facts
- Issued
- Oct 26, 2021, 5:40 PM CDT (22:40 UTC)
- Expired
- Oct 26, 2021, 6:45 PM CDT
- In force
- 65 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...severe thunderstorm watch likely
- Chance of a watch
- 95%
All 23 counties
Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, Tillman County, OK, Baylor County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Fisher County, TX, Foard County, TX, Hardeman County, TX, Haskell County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Mitchell County, TX, Nolan County, TX, Scurry County, TX, Stonewall County, TX, Throckmorton County, TX, Wilbarger County, TX
The radar
The Dyess AFB radar (KDYX), 134 km from the middle of the area, began a volume at 22:45 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Midland Regional, TX (KMAF), launched 12:00Z, 10.7 hours before the alert went out and 238 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
- 293 J/kg
- Mixed-layer CIN
- -449 J/kg
- Mixed-layer LCL
- 1923 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 156 m²/s²
- 0-3 km storm-relative helicity
- 190 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 26, 4:51 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Custer, Dewey, Ellis, Harper and 3 more | 84 min |
| Oct 26, 6:17 PM CDT | Tornado Watch | SPC | Alfalfa, Beckham, Blaine, Custer, Dewey, Ellis and 6 more | 7 hr |
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.