Alert archive / Texas / Mesoscale Discussions in 2007
Mesoscale Discussion 277
The Storm Prediction Center issued this mesoscale discussion at Mar 13, 2007, 11:03 AM CDT for 51 counties in Texas. It was in force for 117 min.
The area
The outline as issued.
The facts
- Issued
- Mar 13, 2007, 11:03 AM CDT (16:03 UTC)
- Expired
- Mar 13, 2007, 1:00 PM CDT
- In force
- 117 min
- Issued by
- the Storm Prediction Center
All 51 counties
Atascosa County, TX, Bandera County, TX, Bastrop County, TX, Bee County, TX, Bell County, TX, Bexar County, TX, Blanco County, TX, Brown County, TX, Burnet County, TX, Caldwell County, TX, Comal County, TX, Comanche County, TX, Coryell County, TX, DeWitt County, TX, Dimmit County, TX, Duval County, TX, Edwards County, TX, Frio County, TX, Gillespie County, TX, Goliad County, TX, Gonzales County, TX, Guadalupe County, TX, Hamilton County, TX, Hays County, TX, Jim Wells County, TX, Karnes County, TX, Kendall County, TX, Kerr County, TX, Kimble County, TX, Kinney County, TX, La Salle County, TX, Lampasas County, TX, Live Oak County, TX, Llano County, TX, Mason County, TX, Maverick County, TX, McCulloch County, TX, McMullen County, TX, Medina County, TX, Menard County, TX, Mills County, TX, Nueces County, TX, Real County, TX, Refugio County, TX, San Patricio County, TX, San Saba County, TX, Travis County, TX, Uvalde County, TX, Williamson County, TX, Wilson County, TX, Zavala County, TX
The radar
The Laughlin AFB radar (KDFX), 108 km from the middle of the area, began a volume at 16:07 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, 4.1 hours before the alert went out and 156 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
- 187 J/kg
- Mixed-layer CIN
- -234 J/kg
- Mixed-layer LCL
- 943 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 148 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.6
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 12, 7:39 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bastrop, Bexar, Blanco, Burleson, Caldwell and 19 more | 3 hr |
| Mar 13, 12:58 PM CDT | Severe Thunderstorm Watch | SPC | Atascosa, Bandera, Bastrop, Bell, Bexar, Blanco and 61 more | 6 hr |
| Mar 13, 2:38 PM CDT | Mesoscale Discussion | SPC | Cooke, Grayson, Lamar, Montague | 97 min |
| Mar 13, 3:35 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Bastrop, Bell, Bexar, Blanco and 71 more | 85 min |
| Mar 13, 6:20 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bee, Calhoun, DeWitt, Frio, Goliad and 12 more | 55 min |
| Mar 13, 6:40 PM CDT | Tornado Watch | SPC | Aransas, Austin, Bee, Brazoria, Calhoun, Chambers and 25 more | 7 hr |
Nearby
Mesoscale Discussions in Texas, 2007Every mesoscale discussion in 2007
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.