Alert archive / Oklahoma / Mesoscale Discussions in 2014
Mesoscale Discussion 343
The Storm Prediction Center issued this mesoscale discussion at Apr 13, 2014, 6:25 PM CDT for 21 counties in Arkansas; 51 counties in Oklahoma; 6 counties in Texas. It was in force for 65 min.
The area
The outline as issued.
The facts
- Issued
- Apr 13, 2014, 6:25 PM CDT (23:25 UTC)
- Expired
- Apr 13, 2014, 7:30 PM CDT
- In force
- 65 min
- Issued by
- the Storm Prediction Center
All 78 counties
Clark County, AR, Conway County, AR, Crawford County, AR, Franklin County, AR, Garland County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Johnson County, AR, Logan County, AR, Montgomery County, AR, Perry County, AR, Pike County, AR, Polk County, AR, Pope County, AR, Saline County, AR, Scott County, AR, Sebastian County, AR, Sevier County, AR, Van Buren County, AR, Yell County, AR, Atoka County, OK, Bryan County, OK, Canadian County, OK, Carter County, OK, Choctaw County, OK, Cleveland County, OK, Coal County, OK, Comanche County, OK, Cotton County, OK, Craig County, OK, Creek County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Grant County, OK, Haskell County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Kay County, OK, Kingfisher County, OK, Latimer County, OK, LeFlore County, OK, Lincoln County, OK, Logan County, OK, Love County, OK, Marshall County, OK, McClain County, OK, McCurtain County, OK, McIntosh County, OK, Murray County, OK, Muskogee County, OK, Noble County, OK, Nowata County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Pushmataha County, OK, Rogers County, OK, Seminole County, OK, Sequoyah County, OK, Stephens County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK, Archer County, TX, Clay County, TX, Cooke County, TX, Grayson County, TX, Montague County, TX, Wichita County, TX
The radar
The Norman radar (KTLX), 130 km from the middle of the area, began a volume at 23:28 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 12:00Z, 11.4 hours before the alert went out and 136 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
- 275 J/kg
- Mixed-layer CIN
- -227 J/kg
- Mixed-layer LCL
- 1301 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 456 m²/s²
- 0-3 km storm-relative helicity
- 480 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.6
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 13, 2:34 PM CDT | Mesoscale Discussion | SPC | Columbia, Hempstead, Howard, Lafayette, Little River, Miller and 2 more | 2 hr |
| Apr 13, 4:13 PM CDT | Mesoscale Discussion | SPC | Baxter, Benton, Boone, Carroll, Crawford, Franklin and 9 more | 32 min |
| Apr 13, 4:27 PM CDT | Severe Thunderstorm Watch | SPC | Baxter, Benton, Boone, Carroll, Madison, Marion and 3 more | 7 hr |
| Apr 13, 4:54 PM CDT | Mesoscale Discussion | SPC | Clark, Columbia, Hempstead, Howard, Lafayette, Little River and 4 more | 66 min |
| Apr 13, 5:13 PM CDT | Tornado Watch | SPC | Columbia, Hempstead, Howard, Lafayette, Little River, Miller and 3 more | 6 hr |
| Apr 13, 6:01 PM CDT | Mesoscale Discussion | SPC | Baxter, Benton, Boone, Carroll, Madison, Marion and 3 more | 59 min |
| Apr 13, 12:26 PM CDT | Mesoscale Discussion | SPC | Caddo, Canadian, Carter, Cleveland, Comanche, Cotton and 25 more | 94 min |
| Apr 13, 1:56 PM CDT | Tornado Watch | SPC | Atoka, Bryan, Canadian, Carter, Cleveland, Coal and 39 more | 8 hr |
| Apr 13, 3:09 PM CDT | Mesoscale Discussion | SPC | Carter, Cleveland, Creek, Garvin, Grady, Lincoln and 12 more | 96 min |
| Apr 13, 1:43 PM CDT | Mesoscale Discussion | SPC | Brown, Callahan, Coleman, Comanche, Concho, Eastland and 7 more | 2 hr |
Nearby
Mesoscale Discussions in Oklahoma, 2014Mesoscale Discussions in Arkansas, 2014Mesoscale Discussions in Texas, 2014Every mesoscale discussion in 2014
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.