Alert archive / Texas / Mesoscale Discussions in 2013
Mesoscale Discussion 643
The Storm Prediction Center issued this mesoscale discussion at May 15, 2013, 2:59 PM CDT for 12 counties in Oklahoma; 46 counties in Texas. It was in force for 91 min.
The area
The outline as issued.
The facts
- Issued
- May 15, 2013, 2:59 PM CDT (19:59 UTC)
- Expired
- May 15, 2013, 4:30 PM CDT
- In force
- 91 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 58 counties
Carter County, OK, Coal County, OK, Cotton County, OK, Garvin County, OK, Jefferson County, OK, Johnston County, OK, Love County, OK, Marshall County, OK, Murray County, OK, Pontotoc County, OK, Stephens County, OK, Tillman County, OK, Archer County, TX, Baylor County, TX, Bosque County, TX, Brown County, TX, Callahan County, TX, Clay County, TX, Coke County, TX, Coleman County, TX, Collin County, TX, Comanche County, TX, Concho County, TX, Cooke County, TX, Dallas County, TX, Denton County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Fisher County, TX, Foard County, TX, Grayson County, TX, Hamilton County, TX, Haskell County, TX, Hill County, TX, Hood County, TX, Jack County, TX, Johnson County, TX, Jones County, TX, Knox County, TX, Mills County, TX, Montague County, TX, Nolan County, TX, Palo Pinto County, TX, Parker County, TX, Runnels County, TX, Shackelford County, TX, Somervell County, TX, Stephens County, TX, Stonewall County, TX, Tarrant County, TX, Taylor County, TX, Throckmorton County, TX, Tom Green County, TX, Wichita County, TX, Wilbarger County, TX, Wise County, TX, Young County, TX
The radar
The Dyess AFB radar (KDYX), 66 km from the middle of the area, began a volume at 20:01 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, 8.0 hours before the alert went out and 136 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
- 109 J/kg
- Mixed-layer CIN
- -169 J/kg
- Mixed-layer LCL
- 827 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 149 m²/s²
- 0-3 km storm-relative helicity
- 139 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
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, 3:04 PM CDT | Mesoscale Discussion | SPC | Carter, Coal, Cotton, Garvin, Jefferson, Johnston and 6 more | 86 min |
| May 15, 3:28 PM CDT | Severe Thunderstorm Watch | SPC | Atoka, Bryan, Carter, Coal, Cotton, Garvin and 8 more | 9 hr |
| May 15, 5:40 PM CDT | Mesoscale Discussion | SPC | Love | 65 min |
| May 15, 6:01 PM CDT | Tornado Watch | SPC | Bryan, Carter, Jefferson, Johnston, Love, Marshall and 1 more | 8 hr |
| May 14, 7:55 PM CDT | Mesoscale Discussion | SPC | Bandera, Dimmit, Edwards, Frio, Kerr, Kimble and 10 more | 2 hr |
| May 15, 5:24 PM CDT | Mesoscale Discussion | SPC | Bandera, Blanco, Edwards, Gillespie, Kendall, Kerr and 9 more | 3 hr |
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.