Alert archive / Texas / Mesoscale Discussions in 2013
Mesoscale Discussion 567
The Storm Prediction Center issued this mesoscale discussion at Apr 27, 2013, 6:43 PM CDT for 61 counties in Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 27, 2013, 6:43 PM CDT (23:43 UTC)
- Expired
- Apr 27, 2013, 8:45 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 61 counties
Atascosa County, TX, Austin County, TX, Bandera County, TX, Bastrop County, TX, Bexar County, TX, Blanco County, TX, Brazoria County, TX, Brazos County, TX, Burleson County, TX, Caldwell County, TX, Chambers County, TX, Colorado County, TX, Comal County, TX, DeWitt County, TX, Dimmit County, TX, Duval County, TX, Edwards County, TX, Fayette County, TX, Fort Bend County, TX, Frio County, TX, Gillespie County, TX, Gonzales County, TX, Grimes County, TX, Guadalupe County, TX, Harris County, TX, Hays County, TX, Houston County, TX, Jackson County, TX, Jim Hogg County, TX, Karnes County, TX, Kendall County, TX, Kerr County, TX, Kinney County, TX, La Salle County, TX, Lavaca County, TX, Lee County, TX, Liberty County, TX, Madison County, TX, Matagorda County, TX, Maverick County, TX, McMullen County, TX, Medina County, TX, Milam County, TX, Montgomery County, TX, Polk County, TX, Real County, TX, Robertson County, TX, San Jacinto County, TX, Travis County, TX, Trinity County, TX, Uvalde County, TX, Val Verde County, TX, Victoria County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Webb County, TX, Wharton County, TX, Wilson County, TX, Zapata County, TX, Zavala County, TX
The radar
The Austin/San Antonio radar (KEWX), 108 km from the middle of the area, began a volume at 23:43 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
Corpus Christi, TX (KCRP), launched 12:00Z, 11.7 hours before the alert went out and 179 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
- 1417 J/kg
- Mixed-layer CIN
- -95 J/kg
- Mixed-layer LCL
- 474 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 55 m²/s²
- 0-3 km storm-relative helicity
- 137 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
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 27, 3:36 PM CDT | Mesoscale Discussion | SPC | Bandera, Bastrop, Bexar, Blanco, Brazos, Burleson and 23 more | 84 min |
| Apr 27, 5:05 PM CDT | Severe Thunderstorm Watch | SPC | Atascosa, Austin, Bandera, Bastrop, Bell, Bexar and 52 more | 8 hr |
| Apr 27, 6:11 PM CDT | Mesoscale Discussion | SPC | Brewster, Terrell | 3 hr |
| Apr 27, 6:54 PM CDT | Mesoscale Discussion | SPC | Nacogdoches, Panola, Shelby | 66 min |
Nearby
Mesoscale Discussions in Texas, 2013Every mesoscale discussion in 2013
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.