Alert archive / Texas / Mesoscale Discussions in 2004
Mesoscale Discussion 78
The Storm Prediction Center issued this mesoscale discussion at Feb 4, 2004, 8:09 PM CST for 35 counties in Texas. It was in force for 96 min.
The area
The outline as issued.
The facts
- Issued
- Feb 4, 2004, 8:09 PM CST (02:09 UTC)
- Expired
- Feb 4, 2004, 9:45 PM CST
- In force
- 96 min
- Issued by
- the Storm Prediction Center
All 35 counties
Anderson County, TX, Angelina County, TX, Austin County, TX, Brazoria County, TX, Brazos County, TX, Burleson County, TX, Chambers County, TX, Cherokee County, TX, Colorado County, TX, Fayette County, TX, Fort Bend County, TX, Galveston County, TX, Grimes County, TX, Hardin County, TX, Harris County, TX, Houston County, TX, Jasper County, TX, Lee County, TX, Leon County, TX, Liberty County, TX, Madison County, TX, Montgomery County, TX, Nacogdoches County, TX, Polk County, TX, Robertson County, TX, Rusk County, TX, San Augustine County, TX, San Jacinto County, TX, Shelby 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), 77 km from the middle of the area, began a volume at 02:10 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
Lake Charles Mun, LA (KLCH), launched 00:00Z, 2.2 hours before the alert went out and 234 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1156 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- 517 m²/s²
- 0-3 km storm-relative helicity
- 572 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Feb 4, 9:20 PM CST | Severe Thunderstorm Watch | SPC | Anderson, Atascosa, Bandera, Bastrop, Bell, Bexar and 52 more | 6 hr |
| Feb 4, 11:37 PM CST | Mesoscale Discussion | SPC | Hardin, Jasper, Liberty, Newton, Orange, Polk and 3 more | 83 min |
| Feb 4, 11:49 PM CST | Mesoscale Discussion | SPC | Anderson, Atascosa, Bandera, Bastrop, Bell, Bexar and 53 more | 86 min |
| Feb 5, 1:16 AM CST | Mesoscale Discussion | SPC | Angelina, Austin, Brazos, Cherokee, Colorado, Grimes and 20 more | 119 min |
| Feb 5, 5:40 AM CST | Tornado Watch | SPC | Jefferson, Orange | 6 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.