Alert archive / Oklahoma / Mesoscale Discussions in 2019
Mesoscale Discussion 711
The Storm Prediction Center issued this mesoscale discussion at May 20, 2019, 7:38 PM CDT for 7 counties in Oklahoma. It was in force for 97 min.
The area
The outline as issued.
The facts
- Issued
- May 20, 2019, 7:38 PM CDT (00:38 UTC)
- Expired
- May 20, 2019, 9:15 PM CDT
- In force
- 97 min
- Issued by
- the Storm Prediction Center
Counties Canadian County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kingfisher County, OK, Kiowa County, OK, Washita County, OK
The radar
The Altus AFB radar (KFDR), 98 km from the middle of the area, began a volume at 00:37 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, 0.6 hours before the alert went out and 158 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
- 3095 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 733 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 420 m²/s²
- 0-3 km storm-relative helicity
- 523 m²/s²
- Significant tornado parameter
- 10.8
- Supercell composite
- 43.6
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 20, 8:22 PM CDT | Mesoscale Discussion | SPC | Atoka, Beckham, Blaine, Bryan, Caddo, Canadian and 40 more | 53 min |
| May 20, 10:07 PM CDT | Tornado Watch | SPC | Carter, Cleveland, Coal, Comanche, Cotton, Creek and 18 more | 9 hr |
| May 20, 10:30 PM CDT | Mesoscale Discussion | SPC | Adair, Cherokee, Delaware, Haskell, Latimer, LeFlore and 10 more | 60 min |
| May 20, 11:06 PM CDT | Mesoscale Discussion | SPC | Delaware | 24 min |
| May 21, 12:18 AM CDT | Tornado Watch | SPC | Adair, Cherokee, Delaware, Haskell, Latimer, LeFlore and 5 more | 5 hr |
| May 21, 2:24 AM CDT | Mesoscale Discussion | SPC | Carter, Cleveland, Coal, Cotton, Garvin, Grady and 11 more | 96 min |
| May 21, 4:56 AM CDT | Mesoscale Discussion | SPC | Creek, Hughes, Lincoln, McIntosh, Okfuskee, Okmulgee and 2 more | 64 min |
| May 21, 5:09 AM CDT | Tornado Watch | SPC | Adair, Cherokee, Craig, Creek, Delaware, Haskell and 14 more | 9 hr |
| May 21, 7:26 AM CDT | Mesoscale Discussion | SPC | Adair, Atoka, Bryan, Cherokee, Choctaw, Coal and 21 more | 94 min |
Nearby
Mesoscale Discussions in Oklahoma, 2019Every mesoscale discussion in 2019
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.