Alert archive / Texas / Mesoscale Discussions in 2023
Mesoscale Discussion 656
The Storm Prediction Center issued this mesoscale discussion at Apr 28, 2023, 6:15 PM CDT for 22 counties in Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 28, 2023, 6:15 PM CDT (23:15 UTC)
- Expired
- Apr 28, 2023, 8:15 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 179...180
All 22 counties
Atascosa County, TX, Austin County, TX, Bee County, TX, Brazoria County, TX, Colorado County, TX, DeWitt County, TX, Fayette County, TX, Fort Bend County, TX, Goliad County, TX, Gonzales County, TX, Guadalupe County, TX, Harris County, TX, Jackson County, TX, Karnes County, TX, Lavaca County, TX, Live Oak County, TX, McMullen County, TX, Victoria County, TX, Waller County, TX, Washington County, TX, Wharton County, TX, Wilson County, TX
The radar
The Austin/San Antonio radar (KEWX), 109 km from the middle of the area, began a volume at 23:17 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
Del Rio, TX (KDRT), launched 12:00Z, 11.3 hours before the alert went out and 370 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
- 1016 J/kg
- Mixed-layer CIN
- -296 J/kg
- Mixed-layer LCL
- 1372 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 133 m²/s²
- 0-3 km storm-relative helicity
- 263 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
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 28, 12:25 PM CDT | Mesoscale Discussion | SPC | Bell, Bosque, Collin, Comanche, Cooke, Coryell and 29 more | 3 hr |
| Apr 28, 1:17 PM CDT | Tornado Watch | SPC | Bell, Bosque, Comanche, Coryell, Falls, Freestone and 11 more | 7 hr |
| Apr 28, 1:29 PM CDT | Severe Thunderstorm Watch | SPC | Collin, Dallas, Denton, Ellis, Erath, Fannin and 12 more | 7 hr |
| Apr 28, 1:42 PM CDT | Mesoscale Discussion | SPC | Hamilton | 93 min |
| Apr 28, 1:52 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 20 more | 83 min |
| Apr 28, 2:19 PM CDT | Severe Thunderstorm Watch | SPC | Atascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 25 more | 7 hr |
| Apr 28, 3:23 PM CDT | Mesoscale Discussion | SPC | Bell, Coryell | 67 min |
| Apr 28, 3:43 PM CDT | Severe Thunderstorm Watch | SPC | Austin, Brazos, Burleson, Colorado, Grimes, Madison and 2 more | 6 hr |
| Apr 28, 4:53 PM CDT | Mesoscale Discussion | SPC | Austin, Bastrop, Brazos, Burleson, Caldwell, Comal and 10 more | 2 hr |
| Apr 28, 5:34 PM CDT | Mesoscale Discussion | SPC | Duval, Jim Hogg, La Salle, McMullen, Starr, Webb and 1 more | 116 min |
| Apr 28, 5:51 PM CDT | Severe Thunderstorm Watch | SPC | Bee, Brooks, Duval, Goliad, Jim Hogg, Jim Wells and 7 more | 7 hr |
| Apr 28, 6:30 PM CDT | Severe Thunderstorm Watch | SPC | Aransas, Brazoria, Calhoun, Fort Bend, Galveston, Harris and 12 more | 6 hr |
Nearby
Mesoscale Discussions in Texas, 2023Every mesoscale discussion in 2023
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.