Alert archive / Oklahoma / Mesoscale Discussions in 2017
Mesoscale Discussion 1465
The Storm Prediction Center issued this mesoscale discussion at Aug 10, 2017, 1:42 PM CDT for Harper County, Sumner County, Kansas; 27 counties in Oklahoma; Hemphill County, Lipscomb County, Wheeler County, Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 10, 2017, 1:42 PM CDT (18:42 UTC)
- Expired
- Aug 10, 2017, 3:45 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 32 counties
Harper County, KS, Sumner County, KS, Alfalfa County, OK, Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Cleveland County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Grady County, OK, Grant County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, McClain County, OK, Noble County, OK, Oklahoma County, OK, Payne County, OK, Pottawatomie County, OK, Roger Mills County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Hemphill County, TX, Lipscomb County, TX, Wheeler County, TX
The radar
The Vance AFB radar (KVNX), 82 km from the middle of the area, began a volume at 18:42 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, 6.7 hours before the alert went out and 144 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
- 335 J/kg
- Mixed-layer CIN
- -149 J/kg
- Mixed-layer LCL
- 1030 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 84 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 |
|---|---|---|---|---|
| Aug 9, 7:36 PM CDT | Mesoscale Discussion | SPC | Barber, Comanche, Harper | 84 min |
| Aug 10, 2:05 PM CDT | Mesoscale Discussion | SPC | Barton, Cloud, Ellis, Ellsworth, Gove, Graham and 15 more | 115 min |
| Aug 10, 2:06 PM CDT | Severe Thunderstorm Watch | SPC | Barber, Comanche, Harper, Sumner | 7 hr |
| Aug 10, 2:27 PM CDT | Severe Thunderstorm Watch | SPC | Allen, Barton, Butler, Chase, Chautauqua, Clay and 38 more | 7 hr |
| Aug 10, 3:50 PM CDT | Mesoscale Discussion | SPC | Grant, Gray, Greeley, Hamilton, Haskell, Kearny and 5 more | 115 min |
| Aug 10, 4:52 PM CDT | Severe Thunderstorm Watch | SPC | Finney, Grant, Gray, Greeley, Hamilton, Haskell and 7 more | 7 hr |
| Aug 10, 4:53 PM CDT | Mesoscale Discussion | SPC | Barton, Edwards, Ellsworth, Harvey, Kingman, Kiowa and 11 more | 97 min |
| Aug 10, 6:44 PM CDT | Mesoscale Discussion | SPC | Barber, Comanche | 91 min |
| Aug 10, 4:33 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Caddo, Canadian, Cleveland, Creek and 19 more | 57 min |
Nearby
Mesoscale Discussions in Oklahoma, 2017Mesoscale Discussions in Texas, 2017Mesoscale Discussions in Kansas, 2017Every mesoscale discussion in 2017
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.