Alert archive / Texas / Mesoscale Discussions in 2015
Mesoscale Discussion 311
The Storm Prediction Center issued this mesoscale discussion at Apr 16, 2015, 1:34 PM CDT for 54 counties in Texas. It was in force for 116 min.
The area
The outline as issued.
The facts
- Issued
- Apr 16, 2015, 1:34 PM CDT (18:34 UTC)
- Expired
- Apr 16, 2015, 3:30 PM CDT
- In force
- 116 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
All 54 counties
Austin County, TX, Bastrop County, TX, Bell County, TX, Bexar County, TX, Blanco County, TX, Bosque County, TX, Brazos County, TX, Burleson County, TX, Burnet County, TX, Caldwell County, TX, Colorado County, TX, Comal County, TX, Comanche County, TX, Coryell County, TX, DeWitt County, TX, Falls County, TX, Fayette County, TX, Fort Bend County, TX, Freestone County, TX, Gillespie County, TX, Gonzales County, TX, Grimes County, TX, Guadalupe County, TX, Hamilton County, TX, Harris County, TX, Hays County, TX, Hill County, TX, Houston County, TX, Jackson County, TX, Kendall County, TX, Lampasas County, TX, Lavaca County, TX, Lee County, TX, Leon County, TX, Limestone County, TX, Llano County, TX, Madison County, TX, McLennan County, TX, Milam County, TX, Mills County, TX, Montgomery County, TX, Navarro County, TX, Robertson County, TX, San Jacinto County, TX, San Saba County, TX, Travis County, TX, Trinity County, TX, Victoria County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wharton County, TX, Williamson County, TX, Wilson County, TX
The radar
The Ft Hood radar (KGRK), 28 km from the middle of the area, began a volume at 18:36 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
Fort Worth, TX (KFWD), launched 12:00Z, 6.6 hours before the alert went out and 233 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
- 521 J/kg
- Mixed-layer CIN
- -142 J/kg
- Mixed-layer LCL
- 884 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 98 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 16, 12:49 PM CDT | Mesoscale Discussion | SPC | Armstrong, Briscoe, Carson, Castro, Crosby, Donley and 15 more | 116 min |
| Apr 16, 1:48 PM CDT | Tornado Watch | SPC | Armstrong, Carson, Collingsworth, Donley, Gray, Hansford and 8 more | 8 hr |
| Apr 16, 2:22 PM CDT | Severe Thunderstorm Watch | SPC | Anderson, Aransas, Austin, Bastrop, Bee, Bell and 81 more | 8 hr |
| Apr 16, 2:42 PM CDT | Mesoscale Discussion | SPC | Anderson, Aransas, Austin, Bastrop, Bee, Bell and 75 more | 63 min |
| Apr 16, 4:06 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Borden, Brown, Callahan, Childress and 46 more | 2 hr |
| Apr 16, 4:40 PM CDT | Severe Thunderstorm Watch | SPC | Archer, Baylor, Briscoe, Brown, Callahan, Castro and 45 more | 7 hr |
| Apr 16, 4:59 PM CDT | Mesoscale Discussion | SPC | Angelina, Cherokee, Gregg, Hardin, Houston, Jasper and 12 more | 91 min |
| Apr 16, 5:06 PM CDT | Mesoscale Discussion | SPC | Armstrong, Carson, Collingsworth, Donley, Gray, Hansford and 7 more | 84 min |
| Apr 16, 5:29 PM CDT | Mesoscale Discussion | SPC | Bailey, Dallam, Deaf Smith, Hartley, Oldham, Parmer | 91 min |
| Apr 16, 6:19 PM CDT | Mesoscale Discussion | SPC | Anderson, Aransas, Austin, Bastrop, Bell, Bexar and 84 more | 86 min |
Nearby
Mesoscale Discussions in Texas, 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.