Alert archive / Texas / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 117
The Storm Prediction Center issued this severe thunderstorm watch at Apr 24, 2004, 3:45 AM CDT for 27 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 24, 2004, 3:45 AM CDT (08:45 UTC)
- Expired
- Apr 24, 2004, 9:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 27 counties
Austin County, TX, Brazoria County, TX, Calhoun County, TX, Chambers County, TX, Colorado County, TX, Fayette County, TX, Fort Bend County, TX, Galveston County, TX, Hardin County, TX, Harris County, TX, Jackson County, TX, Jasper County, TX, Jefferson County, TX, Lavaca County, TX, Liberty County, TX, Matagorda County, TX, Montgomery County, TX, Newton County, TX, Orange County, TX, Polk County, TX, Sabine County, TX, San Jacinto County, TX, Tyler County, TX, Victoria County, TX, Waller County, TX, Washington County, TX, Wharton County, TX
The radar
The Houston radar (KHGX), 73 km from the middle of the area, began a volume at 08:44 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.
Warnings issued inside it
2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 24, 3:58 AM CDT | Severe Thunderstorm Warning | HGX | Colorado, Jackson, Wharton | 47 min |
| Apr 24, 5:26 AM CDT | Severe Thunderstorm Warning | HGX | Matagorda | 49 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 00:00Z, 8.8 hours before the alert went out and 287 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
- 2567 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 663 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 74 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.3
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 23, 7:48 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Brown, Callahan, Clay, Coke and 29 more | 87 min |
| Apr 23, 9:18 PM CDT | Mesoscale Discussion | SPC | Brown, Callahan, Clay, Coke, Coleman, Comanche and 20 more | 57 min |
| Apr 23, 11:08 PM CDT | Mesoscale Discussion | SPC | Brown, Callahan, Coleman, Comanche, Cooke, Denton and 9 more | 37 min |
| Apr 24, 12:28 AM CDT | Mesoscale Discussion | SPC | Atascosa, Austin, Bastrop, Bee, Bexar, Burleson and 25 more | 92 min |
| Apr 24, 12:50 AM CDT | Severe Thunderstorm Watch | SPC | Aransas, Atascosa, Austin, Bastrop, Bee, Caldwell and 27 more | 5 hr |
| Apr 24, 3:00 AM CDT | Mesoscale Discussion | SPC | Aransas, Austin, Brazoria, Calhoun, Chambers, Colorado and 18 more | 60 min |
Nearby
Severe Thunderstorm Watches in Texas, 2004Every severe thunderstorm watch 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.