Alert archive / Texas / Mesoscale Discussions in 2003
Mesoscale Discussion 442
The Storm Prediction Center issued this mesoscale discussion at Apr 7, 2003, 7:29 PM CDT for 27 counties in Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 7, 2003, 7:29 PM CDT (00:29 UTC)
- Expired
- Apr 7, 2003, 9:30 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 27 counties
Atascosa County, TX, Bandera County, TX, Bee County, TX, Bexar County, TX, Blanco County, TX, Caldwell County, TX, Comal County, TX, DeWitt County, TX, Dimmit County, TX, Frio County, TX, Goliad County, TX, Gonzales County, TX, Guadalupe County, TX, Hays County, TX, Karnes County, TX, Kendall 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, Travis County, TX, Uvalde County, TX, Wilson County, TX, Zavala County, TX
The radar
The Austin/San Antonio radar (KEWX), 113 km from the middle of the area, began a volume at 00:28 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 00:00Z, 0.5 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
- 1447 J/kg
- Mixed-layer CIN
- -28 J/kg
- Mixed-layer LCL
- 1863 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- -35 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.7
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 7, 9:45 PM CDT | Severe Thunderstorm Watch | SPC | Atascosa, Bee, Bexar, Comal, Dimmit, Frio and 12 more | 5 hr |
| Apr 7, 11:36 PM CDT | Mesoscale Discussion | SPC | Atascosa, Dimmit, Frio, Kinney, La Salle, Live Oak and 5 more | 114 min |
| Apr 8, 2:08 AM CDT | Mesoscale Discussion | SPC | Dimmit, La Salle, Webb | 67 min |
Nearby
Mesoscale Discussions in Texas, 2003Every mesoscale discussion in 2003
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.