Alert archive / Oklahoma / Mesoscale Discussions in 2020
Mesoscale Discussion 555
The Storm Prediction Center issued this mesoscale discussion at May 8, 2020, 1:22 AM CDT for 24 counties in Oklahoma. It was in force for 113 min.
The area
The outline as issued.
The facts
- Issued
- May 8, 2020, 1:22 AM CDT (06:22 UTC)
- Expired
- May 8, 2020, 3:15 AM CDT
- In force
- 113 min
- Issued by
- the Storm Prediction Center
All 24 counties
Atoka County, OK, Bryan County, OK, Carter County, OK, Choctaw County, OK, Cleveland County, OK, Coal County, OK, Comanche County, OK, Cotton County, OK, Garvin County, OK, Grady County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Latimer County, OK, Love County, OK, Marshall County, OK, McClain County, OK, Murray County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Pushmataha County, OK, Seminole County, OK, Stephens County, OK
The radar
The Norman radar (KTLX), 80 km from the middle of the area, began a volume at 06:22 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, 6.4 hours before the alert went out and 71 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
- 1914 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 177 m²/s²
- 0-3 km storm-relative helicity
- 596 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 |
|---|---|---|---|---|
| May 7, 7:40 PM CDT | Severe Thunderstorm Watch | SPC | Alfalfa, Beaver, Blaine, Caddo, Canadian, Cleveland and 21 more | 7 hr |
| May 7, 9:24 PM CDT | Mesoscale Discussion | SPC | Beaver, Ellis, Harper, Woodward | 96 min |
| May 7, 11:12 PM CDT | Mesoscale Discussion | SPC | Beckham, Blaine, Caddo, Canadian, Cleveland, Coal and 36 more | 2 hr |
| May 7, 11:25 PM CDT | Severe Thunderstorm Watch | SPC | Atoka, Beckham, Bryan, Carter, Choctaw, Coal and 24 more | 5 hr |
| May 8, 2:30 AM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Carter, Choctaw, Coal, Cotton and 10 more | 2 hr |
| May 8, 3:06 AM CDT | Severe Thunderstorm Watch | SPC | McCurtain | 7 hr |
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.