Alert archive / Oklahoma / Mesoscale Discussions in 2020
Mesoscale Discussion 1197
The Storm Prediction Center issued this mesoscale discussion at Jul 12, 2020, 1:17 AM CDT for 4 states. It was in force for 118 min.
The area
The outline as issued.
The facts
- Issued
- Jul 12, 2020, 1:17 AM CDT (06:17 UTC)
- Expired
- Jul 12, 2020, 3:15 AM CDT
- In force
- 118 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 360...361
All 34 counties
Hempstead County, AR, Howard County, AR, Lafayette County, AR, Little River County, AR, Miller County, AR, Polk County, AR, Sevier County, AR, Bossier Parish, LA, Caddo Parish, LA, Atoka County, OK, Bryan County, OK, Choctaw County, OK, Coal County, OK, Hughes County, OK, Johnston County, OK, Latimer County, OK, McCurtain County, OK, Murray County, OK, Pittsburg County, OK, Pontotoc County, OK, Pushmataha County, OK, Seminole County, OK, Bowie County, TX, Camp County, TX, Cass County, TX, Franklin County, TX, Gregg County, TX, Harrison County, TX, Lamar County, TX, Marion County, TX, Morris County, TX, Red River County, TX, Titus County, TX, Upshur County, TX
The radar
The Western Arkansas radar (KSRX), 187 km from the middle of the area, began a volume at 06:17 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 nearest sounding before it
Fort Worth, TX (KFWD), launched 00:00Z, 6.3 hours before the alert went out and 203 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
- 2012 J/kg
- Mixed-layer CIN
- -203 J/kg
- Mixed-layer LCL
- 1989 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 106 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 |
|---|---|---|---|---|
| Jul 11, 10:59 PM CDT | Mesoscale Discussion | SPC | Polk | 91 min |
| Jul 11, 7:00 PM CDT | Mesoscale Discussion | SPC | Craig, Delaware, Mayes, Nowata, Ottawa, Rogers and 1 more | 90 min |
| Jul 11, 9:23 PM CDT | Mesoscale Discussion | SPC | Adair, Alfalfa, Blaine, Canadian, Cherokee, Creek and 24 more | 2 hr |
| Jul 12, 12:42 AM CDT | Severe Thunderstorm Watch | SPC | Atoka, Bryan, Carter, Coal, Comanche, Cotton and 10 more | 3 hr |
| Jul 12, 3:07 PM CDT | Severe Thunderstorm Watch | SPC | Cimarron | 7 hr |
Nearby
Mesoscale Discussions in Oklahoma, 2020Mesoscale Discussions in Texas, 2020Mesoscale Discussions in Arkansas, 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.