Alert archive / Texas / Mesoscale Discussions in 2011
Mesoscale Discussion 303
The Storm Prediction Center issued this mesoscale discussion at Mar 29, 2011, 2:18 PM CDT for 28 counties in Texas. It was in force for 117 min.
The area
The outline as issued.
The facts
- Issued
- Mar 29, 2011, 2:18 PM CDT (19:18 UTC)
- Expired
- Mar 29, 2011, 4:15 PM CDT
- In force
- 117 min
- Issued by
- the Storm Prediction Center
All 28 counties
Atascosa County, TX, Bandera County, TX, Bee County, TX, Bexar County, TX, DeWitt County, TX, Dimmit County, TX, Edwards County, TX, Frio County, TX, Gillespie County, TX, Goliad County, TX, Guadalupe County, TX, Karnes County, TX, Kendall County, TX, Kerr County, TX, Kimble County, TX, Kinney County, TX, La Salle County, TX, Live Oak County, TX, Mason County, TX, Maverick County, TX, McMullen County, TX, Medina County, TX, Real County, TX, Sutton County, TX, Uvalde County, TX, Val Verde County, TX, Wilson County, TX, Zavala County, TX
The radar
The Laughlin AFB radar (KDFX), 68 km from the middle of the area, began a volume at 19:15 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, 7.3 hours before the alert went out and 118 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
- 860 J/kg
- Mixed-layer CIN
- -186 J/kg
- Mixed-layer LCL
- 518 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 180 m²/s²
- 0-3 km storm-relative helicity
- 237 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.0
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 |
|---|---|---|---|---|
| Mar 29, 2:48 PM CDT | Mesoscale Discussion | SPC | Orange | 87 min |
| Mar 29, 3:57 PM CDT | Severe Thunderstorm Watch | SPC | Aransas, Atascosa, Bandera, Bastrop, Bee, Bexar and 39 more | 7 hr |
| Mar 29, 5:26 PM CDT | Mesoscale Discussion | SPC | Gregg, Harrison, Marion, Panola, Rusk, Shelby | 2 hr |
| Mar 29, 5:59 PM CDT | Mesoscale Discussion | SPC | Aransas, Atascosa, Bandera, Bastrop, Bee, Bexar and 33 more | 2 hr |
Nearby
Mesoscale Discussions in Texas, 2011Every mesoscale discussion in 2011
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.