Alert archive / Texas / Mesoscale Discussions in 2020
Mesoscale Discussion 747
The Storm Prediction Center issued this mesoscale discussion at May 27, 2020, 5:05 PM CDT for 19 counties in Texas. It was in force for 115 min.
The area
The outline as issued.
The facts
- Issued
- May 27, 2020, 5:05 PM CDT (22:05 UTC)
- Expired
- May 27, 2020, 7:00 PM CDT
- In force
- 115 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 230...231
Counties Bexar County, TX, Blanco County, TX, Caldwell County, TX, Comal County, TX, DeWitt County, TX, Gillespie County, TX, Goliad County, TX, Gonzales County, TX, Guadalupe County, TX, Hays County, TX, Jackson County, TX, Karnes County, TX, Kendall County, TX, Lavaca County, TX, Llano County, TX, Mason County, TX, Travis County, TX, Victoria County, TX, Wilson County, TX
The radar
The Austin/San Antonio radar (KEWX), 20 km from the middle of the area, began a volume at 22:07 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, 10.1 hours before the alert went out and 259 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
- 994 J/kg
- Mixed-layer CIN
- -202 J/kg
- Mixed-layer LCL
- 1162 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 95 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 |
|---|---|---|---|---|
| May 27, 12:08 PM CDT | Mesoscale Discussion | SPC | Austin, Bastrop, Bell, Brazos, Burleson, Burnet and 16 more | 2 hr |
| May 27, 12:44 PM CDT | Mesoscale Discussion | SPC | Brown, Burnet, Callahan, Coleman, Comanche, Concho and 11 more | 2 hr |
| May 27, 1:24 PM CDT | Severe Thunderstorm Watch | SPC | Austin, Bastrop, Bell, Blanco, Bosque, Brazoria and 42 more | 9 hr |
| May 27, 1:47 PM CDT | Severe Thunderstorm Watch | SPC | Brown, Callahan, Coleman, Concho, Kimble, McCulloch and 5 more | 7 hr |
| May 27, 2:33 PM CDT | Mesoscale Discussion | SPC | Austin, Colorado, Fayette, Fort Bend, Harris, Lee and 3 more | 87 min |
| May 27, 3:40 PM CDT | Mesoscale Discussion | SPC | Brown, Burnet, Callahan, Coleman, Concho, Lampasas and 6 more | 95 min |
| May 27, 5:23 PM CDT | Severe Thunderstorm Watch | SPC | Atascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 22 more | 8 hr |
Nearby
Mesoscale Discussions in Texas, 2020Every mesoscale discussion in 2020
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.