Alert archive / Texas / Mesoscale Discussions in 2003
Mesoscale Discussion 2453
The Storm Prediction Center issued this mesoscale discussion at Oct 25, 2003, 12:19 PM CDT for 4 parishes in Louisiana; 26 counties in Texas. It was in force for 56 min.
The area
The outline as issued.
The facts
- Issued
- Oct 25, 2003, 12:19 PM CDT (17:19 UTC)
- Expired
- Oct 25, 2003, 1:15 PM CDT
- In force
- 56 min
- Issued by
- the Storm Prediction Center
All 30 counties
Beauregard Parish, LA, Calcasieu Parish, LA, Sabine Parish, LA, Vernon Parish, LA, Angelina County, TX, Austin County, TX, Brazoria County, TX, Chambers County, TX, Colorado County, TX, Fort Bend County, TX, Grimes County, TX, Hardin County, TX, Harris County, TX, Jackson County, TX, Jasper County, TX, Jefferson County, TX, Liberty County, TX, Montgomery County, TX, Newton County, TX, Orange County, TX, Polk County, TX, Sabine County, TX, San Augustine County, TX, San Jacinto County, TX, Trinity County, TX, Tyler County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wharton County, TX
The radar
The Houston radar (KHGX), 84 km from the middle of the area, began a volume at 17:22 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 nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 5.3 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
- 1328 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 769 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 127 m²/s²
- 0-3 km storm-relative helicity
- 148 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.6
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 |
|---|---|---|---|---|
| Oct 25, 9:17 AM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Beauregard, Calcasieu, Cameron, Evangeline and 14 more | 118 min |
| Oct 25, 9:45 AM CDT | Severe Thunderstorm Watch | SPC | Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Cameron and 7 more | 5 hr |
| Oct 25, 2:14 PM CDT | Mesoscale Discussion | SPC | Bienville, Bossier, Caldwell, Catahoula, Claiborne, Concordia and 14 more | 91 min |
| Oct 25, 7:30 AM CDT | Mesoscale Discussion | SPC | Aransas, Brazoria, Calhoun, Chambers, Fort Bend, Galveston and 3 more | 90 min |
| Oct 25, 1:20 PM CDT | Mesoscale Discussion | SPC | Aransas, Austin, Bee, Colorado, DeWitt, Fayette and 13 more | 85 min |
| Oct 25, 5:21 PM CDT | Mesoscale Discussion | SPC | Atascosa, Austin, Bee, Burleson, Colorado, DeWitt and 14 more | 84 min |
Nearby
Mesoscale Discussions in Texas, 2003Mesoscale Discussions in Louisiana, 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.