Alert archive / Texas / Mesoscale Discussions in 2016
Mesoscale Discussion 509
The Storm Prediction Center issued this mesoscale discussion at Apr 30, 2016, 1:46 AM CDT for 9 counties in Texas. It was in force for 59 min.
The area
The outline as issued.
The facts
- Issued
- Apr 30, 2016, 1:46 AM CDT (06:46 UTC)
- Expired
- Apr 30, 2016, 2:45 AM CDT
- In force
- 59 min
- Issued by
- the Storm Prediction Center
Counties Bandera County, TX, Bexar County, TX, Blanco County, TX, Comal County, TX, Hays County, TX, Kendall County, TX, Kinney County, TX, Medina County, TX, Uvalde County, TX
The radar
The Laughlin AFB radar (KDFX), 110 km from the middle of the area, began a volume at 06:45 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
Del Rio, TX (KDLF), launched 00:00Z, 6.8 hours before the alert went out and 160 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
- 1523 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 1775 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- -68 m²/s²
- 0-3 km storm-relative helicity
- -49 m²/s²
- Significant tornado parameter
- -0.3
- Supercell composite
- -8.5
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 8:07 PM CDT | Mesoscale Discussion | SPC | Bandera, Bastrop, Bell, Bexar, Blanco, Bosque and 29 more | 83 min |
| Apr 29, 8:20 PM CDT | Severe Thunderstorm Watch | SPC | Bandera, Bastrop, Bexar, Blanco, Burnet, Caldwell and 19 more | 9 hr |
| Apr 29, 8:56 PM CDT | Mesoscale Discussion | SPC | Anderson, Angelina, Bowie, Brazos, Burleson, Camp and 34 more | 94 min |
| Apr 29, 9:58 PM CDT | Severe Thunderstorm Watch | SPC | Anderson, Angelina, Bell, Bowie, Brazos, Burleson and 47 more | 7 hr |
| Apr 29, 11:42 PM CDT | Mesoscale Discussion | SPC | Bowie, Camp, Cass, Gregg, Harrison, Marion and 4 more | 93 min |
| Apr 30, 3:23 AM CDT | Mesoscale Discussion | SPC | Hardin, Harris, Jasper, Jefferson, Liberty, Newton and 7 more | 97 min |
| Apr 30, 5:11 AM CDT | Severe Thunderstorm Watch | SPC | Hardin, Jasper, Jefferson, Newton, Orange, Sabine and 1 more | 9 hr |
| Apr 30, 5:12 AM CDT | Mesoscale Discussion | SPC | Austin, Burleson, Colorado, Fayette, Grimes, Harris and 7 more | 93 min |
| Apr 30, 5:27 AM CDT | Severe Thunderstorm Watch | SPC | Austin, Brazoria, Brazos, Burleson, Chambers, Colorado and 11 more | 6 hr |
| Apr 30, 7:38 AM CDT | Mesoscale Discussion | SPC | Chambers, Fort Bend, Hardin, Harris, Jefferson, Liberty and 1 more | 67 min |
Nearby
Mesoscale Discussions in Texas, 2016Every mesoscale discussion in 2016
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.