Alert archive / Texas / Mesoscale Discussions in 2015
Mesoscale Discussion 342
The Storm Prediction Center issued this mesoscale discussion at Apr 17, 2015, 5:41 PM CDT for 32 counties in Texas. It was in force for 94 min.
The area
The outline as issued.
The facts
- Issued
- Apr 17, 2015, 5:41 PM CDT (22:41 UTC)
- Expired
- Apr 17, 2015, 7:15 PM CDT
- In force
- 94 min
- Issued by
- the Storm Prediction Center
All 32 counties
Aransas County, TX, Atascosa County, TX, Bee County, TX, Brazoria County, TX, Brooks County, TX, Calhoun County, TX, Colorado County, TX, DeWitt County, TX, Dimmit County, TX, Duval County, TX, Fort Bend County, TX, Frio County, TX, Goliad County, TX, Jackson County, TX, Jim Hogg County, TX, Jim Wells County, TX, Karnes County, TX, Kenedy County, TX, Kleberg County, TX, La Salle County, TX, Lavaca County, TX, Live Oak County, TX, Matagorda County, TX, McMullen County, TX, Nueces County, TX, Refugio County, TX, San Patricio County, TX, Starr County, TX, Victoria County, TX, Webb County, TX, Wharton County, TX, Zapata County, TX
The radar
The Corpus Christi radar (KCRP), 69 km from the middle of the area, began a volume at 22:43 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
Corpus Christi, TX (KCRP), launched 12:00Z, 10.7 hours before the alert went out and 84 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
- 854 J/kg
- Mixed-layer CIN
- -117 J/kg
- Mixed-layer LCL
- 525 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 89 m²/s²
- 0-3 km storm-relative helicity
- 110 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 4.2
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, 7:08 PM CDT | Mesoscale Discussion | SPC | Collingsworth, Wheeler | 2 hr |
| Apr 16, 7:16 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Briscoe, Brown, Callahan, Childress and 41 more | 89 min |
| Apr 16, 7:44 PM CDT | Mesoscale Discussion | SPC | Dallam, Hansford, Sherman | 61 min |
| Apr 16, 8:20 PM CDT | Mesoscale Discussion | SPC | Brazoria, Chambers, Colorado, Fort Bend, Galveston, Harris and 2 more | 85 min |
| Apr 16, 8:36 PM CDT | Tornado Watch | SPC | Austin, Brazoria, Chambers, Colorado, Fort Bend, Galveston and 10 more | 3 hr |
| Apr 16, 10:20 PM CDT | Mesoscale Discussion | SPC | Andrews, Armstrong, Borden, Briscoe, Carson, Castro and 32 more | 2 hr |
| Apr 16, 11:33 PM CDT | Mesoscale Discussion | SPC | Austin, Brazoria, Chambers, Colorado, Fort Bend, Galveston and 6 more | 87 min |
| Apr 16, 11:59 PM CDT | Severe Thunderstorm Watch | SPC | Collingsworth, Donley, Gray, Hemphill, Roberts, Wheeler | 5 hr |
| Apr 17, 1:10 AM CDT | Mesoscale Discussion | SPC | Borden, Childress, Cottle, Crosby, Dawson, Dickens and 13 more | 95 min |
| Apr 17, 2:02 AM CDT | Mesoscale Discussion | SPC | Collingsworth, Donley, Gray, Hemphill, Lipscomb, Roberts and 1 more | 88 min |
| Apr 17, 4:43 AM CDT | Mesoscale Discussion | SPC | Hardeman | 62 min |
| Apr 17, 10:26 AM CDT | Mesoscale Discussion | SPC | Bandera, Bexar, Blanco, Burnet, Comal, Edwards and 12 more | 2 hr |
| Apr 17, 10:55 AM CDT | Mesoscale Discussion | SPC | Baylor, Brown, Callahan, Coke, Coleman, Concho and 15 more | 2 hr |
| Apr 17, 11:53 AM CDT | Severe Thunderstorm Watch | SPC | Archer, Atascosa, Bandera, Baylor, Bee, Bell and 73 more | 7 hr |
| Apr 17, 1:31 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bee, Calhoun, DeWitt, Dimmit, Frio and 12 more | 89 min |
| Apr 17, 3:06 PM CDT | Mesoscale Discussion | SPC | Briscoe, Carson, Childress, Collingsworth, Donley, Gray and 8 more | 84 min |
| Apr 17, 3:22 PM CDT | Mesoscale Discussion | SPC | Aransas, Bee, Brazoria, Calhoun, Colorado, DeWitt and 11 more | 113 min |
| Apr 17, 3:30 PM CDT | Severe Thunderstorm Watch | SPC | Aransas, Atascosa, Austin, Bastrop, Brazoria, Brazos and 30 more | 6 hr |
| Apr 17, 5:02 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Bosque, Brown, Callahan, Clay and 28 more | 88 min |
| Apr 17, 6:57 PM CDT | Tornado Watch | SPC | Aransas, Bee, Brooks, Calhoun, Duval, Goliad and 16 more | 5 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; radar from the NEXRAD Level II archive.