Alert archive / Texas / Mesoscale Discussions in 2004
Mesoscale Discussion 2408
The Storm Prediction Center issued this mesoscale discussion at Nov 17, 2004, 9:36 AM CST for 33 counties in Texas. It was in force for 114 min.
The area
The outline as issued.
The facts
- Issued
- Nov 17, 2004, 9:36 AM CST (15:36 UTC)
- Expired
- Nov 17, 2004, 11:30 AM CST
- In force
- 114 min
- Issued by
- the Storm Prediction Center
All 33 counties
Aransas County, TX, Austin County, TX, Brazoria County, TX, Brazos County, TX, Burleson County, TX, Calhoun County, TX, Chambers County, TX, Colorado County, TX, DeWitt County, TX, Fayette County, TX, Fort Bend County, TX, Freestone County, TX, Goliad County, TX, Grimes County, TX, Harris County, TX, Jackson County, TX, Lavaca County, TX, Lee County, TX, Leon County, TX, Liberty County, TX, Limestone County, TX, Madison County, TX, Matagorda County, TX, Milam County, TX, Montgomery County, TX, Refugio County, TX, Robertson County, TX, San Jacinto County, TX, Victoria County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wharton County, TX
The radar
The Houston radar (KHGX), 135 km from the middle of the area, began a volume at 15:38 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, 3.6 hours before the alert went out and 203 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
- 800 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 738 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 167 m²/s²
- 0-3 km storm-relative helicity
- 182 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 7.2
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 |
|---|---|---|---|---|
| Nov 17, 1:11 AM CST | Mesoscale Discussion | SPC | Aransas, Bee, Calhoun, Goliad, Kleberg, Nueces and 3 more | 94 min |
| Nov 17, 10:05 AM CST | Tornado Watch | SPC | Austin, Brazoria, Brazos, Burleson, Chambers, Colorado and 12 more | 6 hr |
| Nov 17, 12:26 PM CST | Mesoscale Discussion | SPC | Austin, Brazoria, Chambers, Colorado, Fort Bend, Galveston and 11 more | 94 min |
| Nov 17, 3:10 PM CST | Mesoscale Discussion | SPC | Brazoria, Chambers, Fort Bend, Galveston, Hardin, Harris and 7 more | 65 min |
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.