Alert archive / Texas / Mesoscale Discussions in 2018
Mesoscale Discussion 519
The Storm Prediction Center issued this mesoscale discussion at May 25, 2018, 2:41 PM CDT for 10 counties in Oklahoma; 26 counties in Texas. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- May 25, 2018, 2:41 PM CDT (19:41 UTC)
- Expired
- May 25, 2018, 5:15 PM CDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 36 counties
Beckham County, OK, Custer County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, Roger Mills County, OK, Tillman County, OK, Washita County, OK, Archer County, TX, Baylor County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Dickens County, TX, Foard County, TX, Hall County, TX, Hardeman County, TX, Haskell County, TX, Hemphill County, TX, Jack County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Motley County, TX, Palo Pinto County, TX, Shackelford County, TX, Stephens County, TX, Stonewall County, TX, Throckmorton County, TX, Wheeler County, TX, Wichita County, TX, Wilbarger County, TX, Young County, TX
The radar
The Altus AFB radar (KFDR), 62 km from the middle of the area, began a volume at 19:40 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
Amarillo Airport, TX (KAMA), launched 12:00Z, 7.7 hours before the alert went out and 208 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
- 919 J/kg
- Mixed-layer CIN
- -240 J/kg
- Mixed-layer LCL
- 2054 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- 124 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
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 |
|---|---|---|---|---|
| May 25, 3:43 PM CDT | Severe Thunderstorm Watch | SPC | Beckham, Comanche, Cotton, Custer, Dewey, Ellis and 8 more | 6 hr |
| May 25, 6:41 PM CDT | Mesoscale Discussion | SPC | Beckham, Blaine, Caddo, Comanche, Cotton, Custer and 11 more | 64 min |
| May 25, 11:21 AM CDT | Mesoscale Discussion | SPC | Anderson, Camp, Collin, Cooke, Dallas, Delta and 23 more | 2 hr |
| May 25, 5:25 PM CDT | Mesoscale Discussion | SPC | Brown, Comanche, Eastland, Erath, Hood, Palo Pinto | 95 min |
Nearby
Mesoscale Discussions in Texas, 2018Mesoscale Discussions in Oklahoma, 2018Every mesoscale discussion in 2018
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.