Alert archive / Texas / Mesoscale Discussions in 2015
Mesoscale Discussion 2008
The Storm Prediction Center issued this mesoscale discussion at Dec 12, 2015, 6:09 PM CST for 11 counties in Oklahoma; 40 counties in Texas. It was in force for 96 min.
The area
The outline as issued.
The facts
- Issued
- Dec 12, 2015, 6:09 PM CST (00:09 UTC)
- Expired
- Dec 12, 2015, 7:45 PM CST
- In force
- 96 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 51 counties
Choctaw County, OK, Haskell County, OK, Latimer County, OK, LeFlore County, OK, McCurtain County, OK, McIntosh County, OK, Muskogee County, OK, Pittsburg County, OK, Pushmataha County, OK, Sequoyah County, OK, Wagoner County, OK, Anderson County, TX, Bowie County, TX, Brazos County, TX, Camp County, TX, Cass County, TX, Cherokee County, TX, Delta County, TX, Fannin County, TX, Franklin County, TX, Freestone County, TX, Gregg County, TX, Grimes County, TX, Harrison County, TX, Henderson County, TX, Hopkins County, TX, Houston County, TX, Hunt County, TX, Kaufman County, TX, Lamar County, TX, Leon County, TX, Madison County, TX, Marion County, TX, Montgomery County, TX, Morris County, TX, Nacogdoches County, TX, Navarro County, TX, Polk County, TX, Rains County, TX, Red River County, TX, Robertson County, TX, Rusk County, TX, San Jacinto County, TX, Smith County, TX, Titus County, TX, Trinity County, TX, Upshur County, TX, Van Zandt County, TX, Walker County, TX, Waller County, TX, Wood County, TX
The radar
The Shreveport radar (KSHV), 161 km from the middle of the area, began a volume at 00:11 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, 0.2 hours before the alert went out and 167 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
- 374 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 699 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 296 m²/s²
- 0-3 km storm-relative helicity
- 305 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.4
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 |
|---|---|---|---|---|
| Dec 12, 9:14 PM CST | Mesoscale Discussion | SPC | Beckham, Comanche, Custer, Greer, Harmon, Jackson and 4 more | 2 hr |
| Dec 12, 11:40 PM CST | Mesoscale Discussion | SPC | Comanche, Cotton, Jackson, Kiowa, Tillman | 35 min |
| Dec 13, 9:18 AM CST | Mesoscale Discussion | SPC | Beaver, Cimarron, Texas | 6 hr |
| Dec 13, 7:17 AM CST | Mesoscale Discussion | SPC | Chambers, Galveston | 88 min |
Nearby
Mesoscale Discussions in Texas, 2015Mesoscale Discussions in Oklahoma, 2015Every mesoscale discussion in 2015
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.