Alert archive / Texas / Mesoscale Discussions in 2007
Mesoscale Discussion 769
The Storm Prediction Center issued this mesoscale discussion at May 10, 2007, 2:56 PM CDT for 48 counties in Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- May 10, 2007, 2:56 PM CDT (19:56 UTC)
- Expired
- May 10, 2007, 5:00 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 48 counties
Atascosa County, TX, Austin County, TX, Bastrop County, TX, Bee County, TX, Bexar County, TX, Brazoria County, TX, Brazos County, TX, Burleson County, TX, Caldwell County, TX, Colorado County, TX, Comal County, TX, DeWitt County, TX, Falls County, TX, Fayette County, TX, Fort Bend County, TX, Frio County, TX, Goliad County, TX, Gonzales County, TX, Grimes County, TX, Guadalupe County, TX, Harris County, TX, Hays County, TX, Jackson County, TX, Karnes County, TX, Kendall County, TX, La Salle County, TX, Lavaca County, TX, Lee County, TX, Live Oak County, TX, Madison County, TX, Matagorda County, TX, McMullen County, TX, Medina County, TX, Milam County, TX, Montgomery County, TX, Refugio County, TX, Robertson County, TX, San Jacinto County, TX, Travis County, TX, Uvalde County, TX, Victoria County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wharton County, TX, Williamson County, TX, Wilson County, TX, Zavala County, TX
The radar
The Austin/San Antonio radar (KEWX), 77 km from the middle of the area, began a volume at 19:55 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, 7.9 hours before the alert went out and 187 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
- 219 J/kg
- Mixed-layer CIN
- -211 J/kg
- Mixed-layer LCL
- 741 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 78 m²/s²
- 0-3 km storm-relative helicity
- -9 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| May 9, 7:03 PM CDT | Severe Thunderstorm Watch | SPC | Bell, Bexar, Blanco, Burnet, Comal, Coryell and 12 more | 4 hr |
| May 9, 9:33 PM CDT | Mesoscale Discussion | SPC | Webb, Zapata | 57 min |
| May 10, 5:54 PM CDT | Severe Thunderstorm Watch | SPC | Aransas, Atascosa, Austin, Bee, Brazoria, Calhoun and 25 more | 5 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.