Alert archive / Oklahoma / Mesoscale Discussions in 2020
Mesoscale Discussion 664
The Storm Prediction Center issued this mesoscale discussion at May 22, 2020, 3:51 AM CDT for 14 counties in Oklahoma. It was in force for 84 min.
The area
The outline as issued.
The facts
- Issued
- May 22, 2020, 3:51 AM CDT (08:51 UTC)
- Expired
- May 22, 2020, 5:15 AM CDT
- In force
- 84 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 200
Counties Blaine County, OK, Canadian County, OK, Custer County, OK, Dewey County, OK, Garfield County, OK, Grant County, OK, Kay County, OK, Kingfisher County, OK, Logan County, OK, Major County, OK, Noble County, OK, Oklahoma County, OK, Pawnee County, OK, Payne County, OK
The radar
The Vance AFB radar (KVNX), 88 km from the middle of the area, began a volume at 08:54 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 00:00Z, 8.9 hours before the alert went out and 98 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
- 922 J/kg
- Mixed-layer CIN
- -99 J/kg
- Mixed-layer LCL
- 885 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 81 m²/s²
- 0-3 km storm-relative helicity
- 130 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 3.9
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 21, 9:10 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Beaver, Ellis, Harper, Texas, Woods and 1 more | 65 min |
| May 21, 9:49 PM CDT | Severe Thunderstorm Watch | SPC | Alfalfa, Beaver, Blaine, Canadian, Dewey, Ellis and 14 more | 8 hr |
| May 21, 11:28 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Beaver, Harper, Woods, Woodward | 2 hr |
| May 22, 5:01 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Atoka, Cherokee, Cleveland, Coal, Creek and 21 more | 6 hr |
| May 22, 9:15 AM CDT | Mesoscale Discussion | SPC | LeFlore | 90 min |
| May 22, 1:27 PM CDT | Severe Thunderstorm Watch | SPC | Carter, Comanche, Cotton, Garvin, Jefferson, Love and 3 more | 6 hr |
| May 22, 4:55 PM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Carter, Choctaw, Coal, Comanche and 17 more | 2 hr |
| May 22, 6:20 PM CDT | Mesoscale Discussion | SPC | Cotton, Jefferson, Love | 115 min |
Nearby
Mesoscale Discussions in Oklahoma, 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.