Alert archive / Texas / Mesoscale Discussions in 2014
Mesoscale Discussion 509
The Storm Prediction Center issued this mesoscale discussion at May 7, 2014, 1:54 PM CDT for 9 counties in Oklahoma; 28 counties in Texas. It was in force for 66 min.
The area
The outline as issued.
The facts
- Issued
- May 7, 2014, 1:54 PM CDT (18:54 UTC)
- Expired
- May 7, 2014, 3:00 PM CDT
- In force
- 66 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 37 counties
Caddo County, OK, Comanche County, OK, Cotton County, OK, Grady County, OK, Jackson County, OK, Kiowa County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK, Archer County, TX, Baylor County, TX, Callahan County, TX, Clay County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Eastland 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, Nolan County, TX, Runnels County, TX, Scurry County, TX, Shackelford County, TX, Stephens County, TX, Stonewall County, TX, Taylor County, TX, Throckmorton County, TX, Wichita County, TX, Wilbarger County, TX, Young County, TX
The radar
The Dyess AFB radar (KDYX), 99 km from the middle of the area, began a volume at 18:55 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, 6.9 hours before the alert went out and 196 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
- 415 J/kg
- Mixed-layer CIN
- -625 J/kg
- Mixed-layer LCL
- 804 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 285 m²/s²
- 0-3 km storm-relative helicity
- 278 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 |
|---|---|---|---|---|
| May 7, 2:18 PM CDT | Severe Thunderstorm Watch | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Comanche and 17 more | 8 hr |
| May 7, 4:41 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Caddo, Canadian, Custer, Dewey and 10 more | 64 min |
| May 7, 6:26 PM CDT | Mesoscale Discussion | SPC | Canadian, Carter, Cleveland, Cotton, Garfield, Garvin and 15 more | 64 min |
Nearby
Mesoscale Discussions in Texas, 2014Mesoscale Discussions in Oklahoma, 2014Every mesoscale discussion in 2014
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.