Alert archive / Texas / Mesoscale Discussions in 2004
Mesoscale Discussion 2066
The Storm Prediction Center issued this mesoscale discussion at Aug 20, 2004, 9:42 PM CDT for 7 parishes in Louisiana; 52 counties in Texas. It was in force for 63 min.
The area
The outline as issued.
The facts
- Issued
- Aug 20, 2004, 9:42 PM CDT (02:42 UTC)
- Expired
- Aug 20, 2004, 10:45 PM CDT
- In force
- 63 min
- Issued by
- the Storm Prediction Center
All 59 counties
De Soto Parish, LA, Grant Parish, LA, Natchitoches Parish, LA, Rapides Parish, LA, Red River Parish, LA, Sabine Parish, LA, Vernon Parish, LA, Anderson County, TX, Angelina County, TX, Bandera County, TX, Bastrop County, TX, Bell County, TX, Blanco County, TX, Brazos County, TX, Burleson County, TX, Burnet County, TX, Cherokee County, TX, Comal County, TX, Concho County, TX, Coryell County, TX, Edwards County, TX, Falls County, TX, Freestone County, TX, Gillespie County, TX, Grimes County, TX, Hays County, TX, Houston County, TX, Kendall County, TX, Kerr County, TX, Kimble County, TX, Lampasas County, TX, Lee County, TX, Leon County, TX, Limestone County, TX, Llano County, TX, Madison County, TX, Mason County, TX, McCulloch County, TX, McLennan County, TX, Menard County, TX, Milam County, TX, Nacogdoches County, TX, Navarro County, TX, Panola County, TX, Polk County, TX, Real County, TX, Robertson County, TX, Rusk County, TX, Sabine County, TX, San Augustine County, TX, San Saba County, TX, Schleicher County, TX, Shelby County, TX, Sutton County, TX, Tom Green County, TX, Travis County, TX, Trinity County, TX, Walker County, TX, Williamson County, TX
The nearest sounding before it
Shreveport, LA (KSHV), launched 00:00Z, 2.7 hours before the alert went out and 345 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
- 1492 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 1255 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 50 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.6
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 |
|---|---|---|---|---|
| Aug 21, 4:22 PM CDT | Mesoscale Discussion | SPC | Loving, Reeves, Ward | 113 min |
Nearby
Mesoscale Discussions in Texas, 2004Mesoscale Discussions in Louisiana, 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.