Alert archive / Texas / Mesoscale Discussions in 2004
Mesoscale Discussion 463
The Storm Prediction Center issued this mesoscale discussion at Apr 24, 2004, 12:28 AM CDT for 31 counties in Texas. It was in force for 92 min.
The area
The outline as issued.
The facts
- Issued
- Apr 24, 2004, 12:28 AM CDT (05:28 UTC)
- Expired
- Apr 24, 2004, 2:00 AM CDT
- In force
- 92 min
- Issued by
- the Storm Prediction Center
All 31 counties
Atascosa County, TX, Austin County, TX, Bastrop County, TX, Bee County, TX, Bexar County, TX, Burleson County, TX, Caldwell County, TX, Colorado County, TX, Comal County, TX, DeWitt County, TX, Fayette County, TX, Frio County, TX, Goliad County, TX, Gonzales County, TX, Guadalupe 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, McMullen County, TX, Medina County, TX, Refugio County, TX, Travis County, TX, Victoria County, TX, Washington County, TX, Webb County, TX, Wilson County, TX
The radar
The Austin/San Antonio radar (KEWX), 50 km from the middle of the area, began a volume at 05:32 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 00:00Z, 5.5 hours before the alert went out and 183 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
- 2567 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 663 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 74 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.3
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 23, 7:48 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Brown, Callahan, Clay, Coke and 29 more | 87 min |
| Apr 23, 9:18 PM CDT | Mesoscale Discussion | SPC | Brown, Callahan, Clay, Coke, Coleman, Comanche and 20 more | 57 min |
| Apr 23, 11:08 PM CDT | Mesoscale Discussion | SPC | Brown, Callahan, Coleman, Comanche, Cooke, Denton and 9 more | 37 min |
| Apr 24, 12:50 AM CDT | Severe Thunderstorm Watch | SPC | Aransas, Atascosa, Austin, Bastrop, Bee, Caldwell and 27 more | 5 hr |
| Apr 24, 3:00 AM CDT | Mesoscale Discussion | SPC | Aransas, Austin, Brazoria, Calhoun, Chambers, Colorado and 18 more | 60 min |
| Apr 24, 3:45 AM CDT | Severe Thunderstorm Watch | SPC | Austin, Brazoria, Calhoun, Chambers, Colorado, Fayette and 21 more | 5 hr |
Nearby
Mesoscale Discussions in Texas, 2004Every mesoscale discussion in 2004
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.