Alert archive / Texas / Mesoscale Discussions in 2007
Mesoscale Discussion 512
The Storm Prediction Center issued this mesoscale discussion at Apr 17, 2007, 12:47 PM CDT for 49 counties in Texas. It was in force for 118 min.
The area
The outline as issued.
The facts
- Issued
- Apr 17, 2007, 12:47 PM CDT (17:47 UTC)
- Expired
- Apr 17, 2007, 2:45 PM CDT
- In force
- 118 min
- Issued by
- the Storm Prediction Center
All 49 counties
Archer County, TX, Baylor County, TX, Borden County, TX, Bosque County, TX, Brown County, TX, Callahan County, TX, Coleman County, TX, Comanche County, TX, Coryell County, TX, Crosby County, TX, Dawson County, TX, Denton County, TX, Dickens County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Fisher County, TX, Garza County, TX, Hale County, TX, Hamilton County, TX, Haskell County, TX, Hill County, TX, Hockley County, TX, Hood County, TX, Jack County, TX, Johnson County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Lubbock County, TX, Lynn County, TX, McLennan County, TX, Mills County, TX, Mitchell County, TX, Nolan County, TX, Palo Pinto County, TX, Parker County, TX, Scurry County, TX, Shackelford County, TX, Somervell County, TX, Stephens County, TX, Stonewall County, TX, Tarrant County, TX, Taylor County, TX, Terry County, TX, Throckmorton County, TX, Wise County, TX, Young County, TX
The radar
The Dyess AFB radar (KDYX), 64 km from the middle of the area, began a volume at 17:48 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, 5.8 hours before the alert went out and 233 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
- 818 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 135 m²/s²
- 0-3 km storm-relative helicity
- 198 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, 1:37 PM CDT | Severe Thunderstorm Watch | SPC | Archer, Baylor, Borden, Brown, Callahan, Coke and 33 more | 6 hr |
| Apr 17, 2:59 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Borden, Bosque, Brown, Callahan and 56 more | 2 hr |
| Apr 17, 5:22 PM CDT | Mesoscale Discussion | SPC | Bell, Bosque, Burnet, Coryell, Dallas, Denton and 14 more | 83 min |
Nearby
Mesoscale Discussions in Texas, 2007Every mesoscale discussion in 2007
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.