Alert archive / Texas / Mesoscale Discussions in 2018
Mesoscale Discussion 668
The Storm Prediction Center issued this mesoscale discussion at Jun 7, 2018, 6:17 PM CDT for 12 counties in Oklahoma; 34 counties in Texas. It was in force for 118 min.
The area
The outline as issued.
The facts
- Issued
- Jun 7, 2018, 6:17 PM CDT (23:17 UTC)
- Expired
- Jun 7, 2018, 8:15 PM CDT
- In force
- 118 min
- Issued by
- the Storm Prediction Center
All 46 counties
Beckham County, OK, Custer County, OK, Dewey 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, Woodward County, OK, Archer County, TX, Baylor County, TX, Callahan County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Dickens County, TX, Donley County, TX, Eastland County, TX, Fisher County, TX, Foard County, TX, Gray County, TX, Hall County, TX, Hardeman County, TX, Haskell County, TX, Hemphill County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Lipscomb County, TX, Motley County, TX, Nolan County, TX, Palo Pinto County, TX, Roberts County, TX, Scurry County, TX, Shackelford County, TX, Stephens County, TX, Stonewall County, TX, Taylor County, TX, Throckmorton County, TX, Wheeler County, TX, Wilbarger County, TX, Young County, TX
The radar
The Altus AFB radar (KFDR), 70 km from the middle of the area, began a volume at 23:20 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 12:00Z, 11.3 hours before the alert went out and 222 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
- 186 J/kg
- Mixed-layer CIN
- -347 J/kg
- Mixed-layer LCL
- 3186 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -39 m²/s²
- 0-3 km storm-relative helicity
- 8 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 |
|---|---|---|---|---|
| Jun 7, 1:58 AM CDT | Mesoscale Discussion | SPC | Alfalfa, Grant, Woods | 92 min |
| Jun 7, 2:25 AM CDT | Severe Thunderstorm Watch | SPC | Alfalfa, Grant, Woods | 5 hr |
| Jun 7, 4:35 AM CDT | Mesoscale Discussion | SPC | Alfalfa, Woods | 85 min |
| Jun 7, 8:42 AM CDT | Mesoscale Discussion | SPC | Bryan, Carter, Cleveland, Coal, Garvin, Grady and 14 more | 2 hr |
| Jun 7, 3:10 PM CDT | Mesoscale Discussion | SPC | Beckham, Ellis, Greer, Harmon, Jackson, Roger Mills | 95 min |
| Jun 7, 3:28 PM CDT | Severe Thunderstorm Watch | SPC | Beckham, Custer, Dewey, Ellis, Greer, Harmon and 6 more | 5 hr |
| Jun 7, 4:44 PM CDT | Mesoscale Discussion | SPC | Camp, Collin, Dallas, Ellis, Franklin, Gregg and 22 more | 2 hr |
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.