Alert archive / Texas / Mesoscale Discussions in 2008
Mesoscale Discussion 653
The Storm Prediction Center issued this mesoscale discussion at Apr 17, 2008, 5:49 PM CDT for 39 counties in Texas. It was in force for 56 min.
The area
The outline as issued.
The facts
- Issued
- Apr 17, 2008, 5:49 PM CDT (22:49 UTC)
- Expired
- Apr 17, 2008, 6:45 PM CDT
- In force
- 56 min
- Issued by
- the Storm Prediction Center
All 39 counties
Atascosa County, TX, Bandera County, TX, Bell County, TX, Bexar County, TX, Blanco County, TX, Bosque County, TX, Brown County, TX, Burnet County, TX, Coleman County, TX, Comal County, TX, Comanche County, TX, Coryell County, TX, Edwards County, TX, Frio County, TX, Gillespie County, TX, Guadalupe County, TX, Hamilton County, TX, Hays County, TX, Kendall County, TX, Kerr County, TX, Kimble County, TX, Kinney County, TX, Lampasas County, TX, Llano County, TX, Mason County, TX, Maverick County, TX, McCulloch County, TX, McLennan County, TX, Medina County, TX, Menard County, TX, Mills County, TX, Real County, TX, San Saba County, TX, Travis County, TX, Uvalde County, TX, Val Verde County, TX, Williamson County, TX, Wilson County, TX, Zavala County, TX
The radar
The Austin/San Antonio radar (KEWX), 136 km from the middle of the area, began a volume at 22:55 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
Fort Worth, TX (KFWD), launched 12:00Z, 10.8 hours before the alert went out and 308 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
- 6 J/kg
- Mixed-layer CIN
- -796 J/kg
- Mixed-layer LCL
- 713 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 217 m²/s²
- 0-3 km storm-relative helicity
- 421 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 17, 1:30 PM CDT | Mesoscale Discussion | SPC | Collin, Comanche, Cooke, Denton, Erath, Grayson and 9 more | 3 hr |
| Apr 17, 2:56 PM CDT | Severe Thunderstorm Watch | SPC | Archer, Callahan, Clay, Collin, Cooke, Dallas and 18 more | 7 hr |
| Apr 17, 6:38 PM CDT | Severe Thunderstorm Watch | SPC | Bandera, Blanco, Bosque, Brown, Burnet, Coleman and 28 more | 6 hr |
Nearby
Mesoscale Discussions in Texas, 2008Every mesoscale discussion in 2008
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.