Alert archive / Texas / Mesoscale Discussions in 2013
Mesoscale Discussion 587
The Storm Prediction Center issued this mesoscale discussion at May 1, 2013, 3:34 PM CDT for 28 counties in Texas. It was in force for 86 min.
The area
The outline as issued.
The facts
- Issued
- May 1, 2013, 3:34 PM CDT (20:34 UTC)
- Expired
- May 1, 2013, 5:00 PM CDT
- In force
- 86 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 28 counties
Bandera County, TX, Blanco County, TX, Brown County, TX, Burnet County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Comanche County, TX, Concho County, TX, Eastland County, TX, Edwards County, TX, Gillespie County, TX, Kendall County, TX, Kerr County, TX, Kimble County, TX, Lampasas County, TX, Llano County, TX, Mason County, TX, McCulloch County, TX, Menard County, TX, Mills County, TX, Real County, TX, Runnels County, TX, San Saba County, TX, Schleicher County, TX, Sutton County, TX, Taylor County, TX, Tom Green County, TX
The radar
The San Angelo radar (KSJT), 112 km from the middle of the area, began a volume at 20:31 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
Midland Regional, TX (KMAF), launched 12:00Z, 8.6 hours before the alert went out and 286 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
- 430 J/kg
- Mixed-layer CIN
- -471 J/kg
- Mixed-layer LCL
- 2324 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 139 m²/s²
- 0-3 km storm-relative helicity
- 4 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 1, 3:43 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Haskell, Shackelford, Stephens, Throckmorton and 3 more | 2 hr |
| May 1, 4:55 PM CDT | Severe Thunderstorm Watch | SPC | Archer, Bandera, Baylor, Blanco, Brown, Burnet and 42 more | 7 hr |
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.