Alert archive / Texas / Mesoscale Discussions in 2013
Mesoscale Discussion 649
The Storm Prediction Center issued this mesoscale discussion at May 15, 2013, 7:40 PM CDT for 19 counties in Texas. It was in force for 65 min.
The area
The outline as issued.
The facts
- Issued
- May 15, 2013, 7:40 PM CDT (00:40 UTC)
- Expired
- May 15, 2013, 8:45 PM CDT
- In force
- 65 min
- Issued by
- the Storm Prediction Center
Counties Bosque County, TX, Brown County, TX, Collin County, TX, Comanche County, TX, Cooke County, TX, Coryell County, TX, Dallas County, TX, Denton County, TX, Grayson County, TX, Hamilton County, TX, Hill County, TX, Hood County, TX, Johnson County, TX, McLennan County, TX, Mills County, TX, Parker County, TX, Somervell County, TX, Tarrant County, TX, Wise County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 38 km from the middle of the area, began a volume at 00:40 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 00:00Z, 0.7 hours before the alert went out and 34 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
- 1604 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 843 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 244 m²/s²
- 0-3 km storm-relative helicity
- 436 m²/s²
- Significant tornado parameter
- 3.0
- Supercell composite
- 20.6
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 |
|---|---|---|---|---|
| May 15, 7:18 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Callahan, Childress, Cottle, Dickens and 19 more | 57 min |
| May 15, 9:02 PM CDT | Mesoscale Discussion | SPC | Anderson, Bell, Bosque, Brazos, Brown, Burleson and 45 more | 88 min |
| May 15, 11:28 PM CDT | Severe Thunderstorm Watch | SPC | Anderson, Bastrop, Blanco, Brazos, Burleson, Burnet and 23 more | 5 hr |
| May 15, 11:39 PM CDT | Mesoscale Discussion | SPC | Bell, Bosque, Coryell, Dallas, Ellis, Hamilton and 11 more | 96 min |
| May 16, 1:26 AM CDT | Mesoscale Discussion | SPC | Anderson, Angelina, Bell, Brazos, Burleson, Burnet and 21 more | 94 min |
| May 16, 3:21 AM CDT | Mesoscale Discussion | SPC | Brazos, Burleson, Grimes, Lee, Madison, Milam and 1 more | 24 min |
| May 16, 12:07 PM CDT | Mesoscale Discussion | SPC | Harrison, Marion | 83 min |
| May 16, 3:48 PM CDT | Mesoscale Discussion | SPC | Armstrong, Bailey, Borden, Briscoe, Carson, Castro and 27 more | 87 min |
Nearby
Mesoscale Discussions in Texas, 2013Every mesoscale discussion in 2013
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.