Alert archive / Oklahoma / Mesoscale Discussions in 2018
Mesoscale Discussion 838
The Storm Prediction Center issued this mesoscale discussion at Jun 23, 2018, 2:17 PM CDT for 26 counties in Oklahoma; 7 counties in Texas. It was in force for 118 min.
The area
The outline as issued.
The facts
- Issued
- Jun 23, 2018, 2:17 PM CDT (19:17 UTC)
- Expired
- Jun 23, 2018, 4:15 PM CDT
- In force
- 118 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 33 counties
Beckham County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Custer County, OK, Garvin County, OK, Grady County, OK, Greer County, OK, Jackson County, OK, Jefferson County, OK, Johnston County, OK, Kiowa County, OK, Love County, OK, Marshall County, OK, McClain County, OK, Murray County, OK, Oklahoma County, OK, Pontotoc County, OK, Pottawatomie County, OK, Roger Mills County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK, Archer County, TX, Clay County, TX, Cooke County, TX, Grayson County, TX, Montague County, TX, Wichita County, TX, Wilbarger County, TX
The radar
The Altus AFB radar (KFDR), 69 km from the middle of the area, began a volume at 19:20 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Norman, OK (KOUN), launched 12:00Z, 7.3 hours before the alert went out and 113 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2502 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- -153 m²/s²
- 0-3 km storm-relative helicity
- -38 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
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 22, 7:12 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Beaver, Beckham, Blaine, Caddo, Canadian and 22 more | 2 hr |
| Jun 22, 9:07 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 38 more | 113 min |
| Jun 22, 9:27 PM CDT | Severe Thunderstorm Watch | SPC | Atoka, Bryan, Carter, Choctaw, Cleveland, Coal and 38 more | 6 hr |
| Jun 22, 11:09 PM CDT | Mesoscale Discussion | SPC | Atoka, Blaine, Bryan, Caddo, Canadian, Carter and 44 more | 2 hr |
| Jun 22, 11:48 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Cherokee, LeFlore, McCurtain, Mayes, Sequoyah | 7 hr |
| Jun 23, 1:01 AM CDT | Mesoscale Discussion | SPC | Atoka, Blaine, Bryan, Caddo, Canadian, Carter and 44 more | 59 min |
| Jun 23, 2:36 PM CDT | Mesoscale Discussion | SPC | Cimarron | 114 min |
| Jun 23, 3:20 PM CDT | Severe Thunderstorm Watch | SPC | Cimarron | 7 hr |
| Jun 23, 3:56 PM CDT | Severe Thunderstorm Watch | SPC | Beckham, Blaine, Caddo, Canadian, Carter, Cleveland and 24 more | 6 hr |
| Jun 23, 6:37 PM CDT | Mesoscale Discussion | SPC | Cimarron, Texas | 113 min |
Nearby
Mesoscale Discussions in Oklahoma, 2018Mesoscale Discussions in Texas, 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.