Alert archive / Texas / Mesoscale Discussions in 2015
Mesoscale Discussion 449
The Storm Prediction Center issued this mesoscale discussion at Apr 25, 2015, 4:31 AM CDT for 29 counties in Texas. It was in force for 89 min.
The area
The outline as issued.
The facts
- Issued
- Apr 25, 2015, 4:31 AM CDT (09:31 UTC)
- Expired
- Apr 25, 2015, 6:00 AM CDT
- In force
- 89 min
- Issued by
- the Storm Prediction Center
All 29 counties
Atascosa County, TX, Austin County, TX, Bandera County, TX, Bastrop County, TX, Bexar County, TX, Caldwell County, TX, Colorado County, TX, Comal County, TX, DeWitt County, TX, Fayette County, TX, Frio County, TX, Goliad County, TX, Gonzales County, TX, Guadalupe County, TX, Hays County, TX, Jackson County, TX, Karnes County, TX, Kendall County, TX, Kinney County, TX, Lavaca County, TX, Lee County, TX, Medina County, TX, Travis County, TX, Uvalde County, TX, Victoria County, TX, Washington County, TX, Wharton County, TX, Wilson County, TX, Zavala County, TX
The radar
The Austin/San Antonio radar (KEWX), 53 km from the middle of the area, began a volume at 09:33 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
Corpus Christi, TX (KCRP), launched 00:00Z, 9.5 hours before the alert went out and 202 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
- 2964 J/kg
- Mixed-layer CIN
- -221 J/kg
- Mixed-layer LCL
- 666 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 96 m²/s²
- 0-3 km storm-relative helicity
- 88 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.1
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 24, 7:46 PM CDT | Mesoscale Discussion | SPC | Anderson, Bosque, Bowie, Camp, Cass, Cherokee and 38 more | 89 min |
| Apr 24, 9:20 PM CDT | Mesoscale Discussion | SPC | Harrison, Panola | 55 min |
| Apr 24, 9:59 PM CDT | Tornado Watch | SPC | Cherokee, Gregg, Harrison, Marion, Nacogdoches, Panola and 3 more | 4 hr |
| Apr 24, 10:55 PM CDT | Mesoscale Discussion | SPC | Cameron | 65 min |
| Apr 25, 2:48 AM CDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Bexar, Caldwell, Comal, DeWitt and 17 more | 87 min |
| Apr 25, 3:09 AM CDT | Severe Thunderstorm Watch | SPC | Atascosa, Austin, Bandera, Bastrop, Bexar, Blanco and 31 more | 7 hr |
| Apr 25, 6:52 AM CDT | Mesoscale Discussion | SPC | Atascosa, Brazoria, Chambers, DeWitt, Fort Bend, Frio and 11 more | 83 min |
| Apr 25, 7:12 AM CDT | Severe Thunderstorm Watch | SPC | Brazoria, Chambers, Fort Bend, Galveston, Hardin, Harris and 8 more | 6 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.