Alert archive / Texas / Mesoscale Discussions in 2015
Mesoscale Discussion 284
The Storm Prediction Center issued this mesoscale discussion at Apr 12, 2015, 5:05 PM CDT for 21 counties in Texas. It was in force for 115 min.
The area
The outline as issued.
The facts
- Issued
- Apr 12, 2015, 5:05 PM CDT (22:05 UTC)
- Expired
- Apr 12, 2015, 7:00 PM CDT
- In force
- 115 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 21 counties
Andrews County, TX, Borden County, TX, Crane County, TX, Crockett County, TX, Dawson County, TX, Ector County, TX, Gaines County, TX, Garza County, TX, Glasscock County, TX, Howard County, TX, Irion County, TX, Kent County, TX, Lynn County, TX, Martin County, TX, Midland County, TX, Mitchell County, TX, Reagan County, TX, Scurry County, TX, Sterling County, TX, Terry County, TX, Upton County, TX
The watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Midland Regional, TX (KMAF), launched 12:00Z, 10.1 hours before the alert went out and 36 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
- 319 J/kg
- Mixed-layer CIN
- -242 J/kg
- Mixed-layer LCL
- 1230 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 198 m²/s²
- 0-3 km storm-relative helicity
- 130 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 11, 8:19 PM CDT | Mesoscale Discussion | SPC | Armstrong, Briscoe, Carson, Childress, Collingsworth, Crosby and 13 more | 56 min |
| Apr 12, 5:03 PM CDT | Mesoscale Discussion | SPC | Childress, Collingsworth, Hardeman, Hemphill, Lipscomb, Wheeler | 57 min |
| Apr 12, 5:17 PM CDT | Severe Thunderstorm Watch | SPC | Briscoe, Childress, Collingsworth, Cottle, Crosby, Dickens and 16 more | 7 hr |
| Apr 12, 5:39 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Bee, Bexar, Brooks, Dimmit and 20 more | 2 hr |
| Apr 12, 5:59 PM CDT | Severe Thunderstorm Watch | SPC | Atascosa, Bandera, Brooks, Cameron, Crockett, Dimmit and 28 more | 7 hr |
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.