Alert archive / Oklahoma / Mesoscale Discussions in 2018
Mesoscale Discussion 1203
The Storm Prediction Center issued this mesoscale discussion at Jul 30, 2018, 2:01 AM CDT for 28 counties in Oklahoma; 10 counties in Texas. It was in force for 59 min.
The area
The outline as issued.
The facts
- Issued
- Jul 30, 2018, 2:01 AM CDT (07:01 UTC)
- Expired
- Jul 30, 2018, 3:00 AM CDT
- In force
- 59 min
- Issued by
- the Storm Prediction Center
All 38 counties
Atoka County, OK, Bryan County, OK, Caddo 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, Greer County, OK, Hughes County, OK, Jackson County, OK, Jefferson County, OK, Johnston County, OK, Kiowa County, OK, Love County, OK, Marshall County, OK, McClain County, OK, Murray County, OK, Pontotoc County, OK, Pottawatomie County, OK, Pushmataha County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK, Archer County, TX, Clay County, TX, Cooke County, TX, Delta County, TX, Fannin County, TX, Grayson County, TX, Lamar County, TX, Montague County, TX, Wichita County, TX, Wilbarger County, TX
The radar
The Norman radar (KTLX), 101 km from the middle of the area, began a volume at 07:01 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, 7.0 hours before the alert went out and 86 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
- 1506 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 1518 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 4.2
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 29, 9:44 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Beaver, Beckham, Blaine, Caddo, Canadian and 17 more | 61 min |
| Jul 29, 10:04 PM CDT | Severe Thunderstorm Watch | SPC | Alfalfa, Beaver, Beckham, Blaine, Caddo, Canadian and 26 more | 7 hr |
| Jul 29, 11:49 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Beaver, Beckham, Blaine, Caddo, Canadian and 35 more | 56 min |
| Jul 30, 3:49 AM CDT | Severe Thunderstorm Watch | SPC | Atoka, Bryan, Carter, Choctaw, Coal, Cotton and 9 more | 5 hr |
| Jul 30, 6:27 AM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Choctaw, Pushmataha | 93 min |
| Jul 30, 12:17 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Garfield, Grant, Kay, Major, Noble and 4 more | 2 hr |
| Jul 30, 3:47 PM CDT | Mesoscale Discussion | SPC | Adair, Cherokee, Craig, Creek, Delaware, Haskell and 14 more | 2 hr |
Nearby
Mesoscale Discussions in Oklahoma, 2018Mesoscale Discussions in Texas, 2018Every mesoscale discussion in 2018
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.