Alert archive / Texas / Mesoscale Discussions in 2007
Mesoscale Discussion 619
The Storm Prediction Center issued this mesoscale discussion at Apr 29, 2007, 6:34 PM CDT for 26 counties in Texas. It was in force for 86 min.
The area
The outline as issued.
The facts
- Issued
- Apr 29, 2007, 6:34 PM CDT (23:34 UTC)
- Expired
- Apr 29, 2007, 8:00 PM CDT
- In force
- 86 min
- Issued by
- the Storm Prediction Center
All 26 counties
Atascosa County, TX, Bandera County, TX, Bexar County, TX, Blanco County, TX, Comal County, TX, Dimmit County, TX, Edwards County, TX, Frio County, TX, Gillespie County, TX, Guadalupe County, TX, Hays 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, Maverick County, TX, McMullen County, TX, Medina County, TX, Real County, TX, Uvalde County, TX, Webb County, TX, Wilson County, TX, Zavala County, TX
The radar
The Austin/San Antonio radar (KEWX), 112 km from the middle of the area, began a volume at 23:38 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, 11.6 hours before the alert went out and 176 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
- 595 J/kg
- Mixed-layer CIN
- -168 J/kg
- Mixed-layer LCL
- 706 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
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 29, 12:59 AM CDT | Mesoscale Discussion | SPC | Dimmit, Kinney, Maverick, Zavala | 2 hr |
| Apr 29, 5:11 AM CDT | Mesoscale Discussion | SPC | Brewster, Crockett, Jeff Davis, Pecos, Presidio, Terrell and 2 more | 2 hr |
| Apr 29, 7:43 AM CDT | Mesoscale Discussion | SPC | Andrews, Brewster, Crane, Crockett, Ector, Glasscock and 16 more | 3 hr |
| Apr 29, 12:03 PM CDT | Mesoscale Discussion | SPC | Brewster, Crane, Crockett, Culberson, Hudspeth, Jeff Davis and 6 more | 57 min |
| Apr 29, 12:34 PM CDT | Tornado Watch | SPC | Brewster, Crane, Crockett, Culberson, Jeff Davis, Loving and 11 more | 7 hr |
| Apr 29, 3:12 PM CDT | Mesoscale Discussion | SPC | Brewster, Crane, Crockett, Culberson, Jeff Davis, Loving and 11 more | 63 min |
| Apr 29, 3:50 PM CDT | Mesoscale Discussion | SPC | Andrews, Borden, Coke, Crosby, Dawson, Dickens and 21 more | 55 min |
| Apr 29, 4:56 PM CDT | Severe Thunderstorm Watch | SPC | Baylor, Callahan, Coke, Coleman, Concho, Ector and 24 more | 6 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.