Alert archive / Texas / Mesoscale Discussions in 2004
Mesoscale Discussion 477
The Storm Prediction Center issued this mesoscale discussion at Apr 25, 2004, 12:29 PM MDT for Harding County, Union County, New Mexico; 6 counties in Oklahoma; 25 counties in Texas. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 25, 2004, 12:29 PM MDT (18:29 UTC)
- Expired
- Apr 25, 2004, 3:00 PM MDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
All 33 counties
Harding County, NM, Union County, NM, Beckham County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, Roger Mills County, OK, Armstrong County, TX, Briscoe County, TX, Carson County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Dallam County, TX, Deaf Smith County, TX, Donley County, TX, Gray County, TX, Hall County, TX, Hansford County, TX, Hardeman County, TX, Hartley County, TX, Hemphill County, TX, Hutchinson County, TX, Moore County, TX, Ochiltree County, TX, Oldham County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Sherman County, TX, Swisher County, TX, Wheeler County, TX
The radar
The Amarillo radar (KAMA), 57 km from the middle of the area, began a volume at 18:29 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
Dodge City, (KDDC), launched 12:00Z, 6.5 hours before the alert went out and 270 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
- 1423 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -28 m²/s²
- 0-3 km storm-relative helicity
- 65 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 |
|---|---|---|---|---|
| Apr 25, 1:20 PM MDT | Severe Thunderstorm Watch | SPC | Curry, Harding, Quay, Union | 7 hr |
| Apr 25, 4:14 PM MDT | Mesoscale Discussion | SPC | Curry, Harding, Quay, Union | 2 hr |
| Apr 25, 5:10 AM MDT | Mesoscale Discussion | SPC | Aransas, Austin, Brazoria, Calhoun, Colorado, DeWitt and 12 more | 65 min |
| Apr 25, 4:53 PM MDT | Mesoscale Discussion | SPC | Bandera, Edwards, Gillespie, Kerr, Kimble, Mason and 5 more | 97 min |
Nearby
Mesoscale Discussions in Texas, 2004Mesoscale Discussions in Oklahoma, 2004Mesoscale Discussions in New Mexico, 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.