Alert archive / Texas / Mesoscale Discussions in 2003
Mesoscale Discussion 436
The Storm Prediction Center issued this mesoscale discussion at Apr 7, 2003, 12:24 PM CDT for 34 counties in Texas. It was in force for 66 min.
The area
The outline as issued.
The facts
- Issued
- Apr 7, 2003, 12:24 PM CDT (17:24 UTC)
- Expired
- Apr 7, 2003, 1:30 PM CDT
- In force
- 66 min
- Issued by
- the Storm Prediction Center
All 34 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, 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, Lavaca County, TX, Lee County, TX, Matagorda County, TX, Medina County, TX, Montgomery County, TX, Travis County, TX, Victoria County, TX, Waller County, TX, Washington County, TX, Wharton County, TX, Wilson County, TX
The radar
The Austin/San Antonio radar (KEWX), 78 km from the middle of the area, began a volume at 17:26 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, 5.4 hours before the alert went out and 208 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
- 1962 J/kg
- Mixed-layer CIN
- -125 J/kg
- Mixed-layer LCL
- 553 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 117 m²/s²
- Significant tornado parameter
- 0.1
- 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 7, 9:42 AM CDT | Mesoscale Discussion | SPC | Chambers, Galveston, Jefferson, Orange | 3 hr |
| Apr 7, 10:05 AM CDT | Severe Thunderstorm Watch | SPC | Chambers, Galveston, Hardin, Jefferson, Liberty, Orange | 6 hr |
| Apr 7, 1:00 PM CDT | Severe Thunderstorm Watch | SPC | Atascosa, Austin, Bee, Bexar, Brazoria, Caldwell and 23 more | 5 hr |
| Apr 7, 2:13 PM CDT | Mesoscale Discussion | SPC | Chambers, Hardin, Jefferson, Orange | 3 hr |
| Apr 7, 2:36 PM CDT | Mesoscale Discussion | SPC | Chambers, Hardin, Jefferson, Orange | 114 min |
| Apr 7, 3:36 PM CDT | Mesoscale Discussion | SPC | Edwards, Kinney, Maverick, Real, Uvalde, Val Verde | 114 min |
| Apr 7, 3:40 PM CDT | Severe Thunderstorm Watch | SPC | Chambers, Galveston, Jefferson, Liberty, Orange | 5 hr |
| Apr 7, 4:35 PM CDT | Severe Thunderstorm Watch | SPC | Atascosa, Bandera, Bee, Bexar, Blanco, Caldwell and 22 more | 5 hr |
| Apr 7, 5:58 PM CDT | Mesoscale Discussion | SPC | Chambers, Galveston, Jefferson | 2 hr |
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.