Alert archive / Texas / Mesoscale Discussions in 2017
Mesoscale Discussion 819
The Storm Prediction Center issued this mesoscale discussion at May 23, 2017, 6:58 PM CDT for 23 counties in Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- May 23, 2017, 6:58 PM CDT (23:58 UTC)
- Expired
- May 23, 2017, 9:00 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 23 counties
Aransas County, TX, Austin County, TX, Bee County, TX, Calhoun County, TX, Colorado County, TX, DeWitt County, TX, Duval County, TX, Fort Bend County, TX, Goliad County, TX, Jackson County, TX, Jim Wells County, TX, Karnes 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, Victoria County, TX, Wharton County, TX
The radar
The Corpus Christi radar (KCRP), 77 km from the middle of the area, began a volume at 00:01 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 12:00Z, 12.0 hours before the alert went out and 78 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
- 749 J/kg
- Mixed-layer CIN
- -292 J/kg
- Mixed-layer LCL
- 743 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 116 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
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 |
|---|---|---|---|---|
| May 22, 7:26 PM CDT | Severe Thunderstorm Watch | SPC | Andrews, Borden, Callahan, Cochran, Coke, Crane and 40 more | 6 hr |
| May 22, 8:50 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Clay, Cooke, Foard, Hardeman and 10 more | 2 hr |
| May 23, 2:34 PM CDT | Mesoscale Discussion | SPC | Bandera, Bastrop, Bell, Bexar, Blanco, Brazos and 27 more | 116 min |
| May 23, 3:33 PM CDT | Severe Thunderstorm Watch | SPC | Anderson, Angelina, Atascosa, Austin, Bastrop, Bell and 51 more | 7 hr |
| May 23, 6:54 PM CDT | Severe Thunderstorm Watch | SPC | Aransas, Bee, Calhoun, Duval, Goliad, Jim Wells and 9 more | 3 hr |
Nearby
Mesoscale Discussions in Texas, 2017Every mesoscale discussion in 2017
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.