Alert archive / Texas / Mesoscale Discussions in 2013
Mesoscale Discussion 648
The Storm Prediction Center issued this mesoscale discussion at May 15, 2013, 7:18 PM CDT for 11 counties in Oklahoma; 25 counties in Texas. It was in force for 57 min.
The area
The outline as issued.
The facts
- Issued
- May 15, 2013, 7:18 PM CDT (00:18 UTC)
- Expired
- May 15, 2013, 8:15 PM CDT
- In force
- 57 min
- Issued by
- the Storm Prediction Center
All 36 counties
Coal County, OK, Comanche County, OK, Cotton County, OK, Garvin County, OK, Hughes County, OK, Jackson County, OK, Murray County, OK, Pittsburg County, OK, Pontotoc County, OK, Stephens County, OK, Tillman County, OK, Archer County, TX, Baylor County, TX, Callahan County, TX, Childress County, TX, Cottle County, TX, Dickens County, TX, Fisher County, TX, Foard County, TX, Hardeman County, TX, Haskell County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Mitchell County, TX, Motley County, TX, Nolan County, TX, Scurry County, TX, Shackelford County, TX, Stonewall County, TX, Taylor County, TX, Throckmorton County, TX, Wichita County, TX, Wilbarger County, TX, Young County, TX
The radar
The Altus AFB radar (KFDR), 74 km from the middle of the area, began a volume at 00:22 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 nearest sounding before it
Fort Worth, TX (KFWD), launched 00:00Z, 0.3 hours before the alert went out and 158 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, 9:02 PM CDT | Mesoscale Discussion | SPC | Bryan, Choctaw | 88 min |
| May 16, 3:48 PM CDT | Mesoscale Discussion | SPC | Cimarron, Texas | 87 min |
| May 15, 7:40 PM CDT | Mesoscale Discussion | SPC | Bosque, Brown, Collin, Comanche, Cooke, Coryell and 13 more | 65 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 |
Nearby
Mesoscale Discussions in Texas, 2013Mesoscale Discussions in Oklahoma, 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.