Alert archive / Oklahoma / Mesoscale Discussions in 2020
Mesoscale Discussion 1807
The Storm Prediction Center issued this mesoscale discussion at Nov 24, 2020, 12:31 PM CST for 4 counties in Kansas; 26 counties in Oklahoma; 4 counties in Texas. It was in force for 119 min.
The area
The outline as issued.
The facts
- Issued
- Nov 24, 2020, 12:31 PM CST (18:31 UTC)
- Expired
- Nov 24, 2020, 2:30 PM CST
- In force
- 119 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch likely
- Chance of a watch
- 95%
All 34 counties
Barber County, KS, Comanche County, KS, Harper County, KS, Sumner County, KS, Alfalfa County, OK, Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Grant County, OK, Greer County, OK, Harper County, OK, Kay County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, Noble County, OK, Oklahoma County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Roger Mills County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Hemphill County, TX, Lipscomb County, TX, Roberts County, TX, Wheeler County, TX
The radar
The Vance AFB radar (KVNX), 106 km from the middle of the area, began a volume at 18:34 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
Dodge City, (KDDC), launched 12:00Z, 6.5 hours before the alert went out and 214 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
- 652 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 273 m²/s²
- 0-3 km storm-relative helicity
- 285 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 |
|---|---|---|---|---|
| Nov 24, 5:17 PM CST | Mesoscale Discussion | SPC | Chautauqua, Cherokee, Cowley, Elk, Harper, Labette and 3 more | 118 min |
| Nov 24, 1:50 PM CST | Severe Thunderstorm Watch | SPC | Alfalfa, Beaver, Beckham, Blaine, Caddo, Canadian and 23 more | 6 hr |
Nearby
Mesoscale Discussions in Oklahoma, 2020Mesoscale Discussions in Kansas, 2020Mesoscale Discussions in Texas, 2020Every mesoscale discussion in 2020
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.