Alert archive / Texas / Mesoscale Discussions in 2011
Mesoscale Discussion 870
The Storm Prediction Center issued this mesoscale discussion at May 22, 2011, 6:56 PM CDT for 31 counties in Texas. It was in force for 64 min.
The area
The outline as issued.
The facts
- Issued
- May 22, 2011, 6:56 PM CDT (23:56 UTC)
- Expired
- May 22, 2011, 8:00 PM CDT
- In force
- 64 min
- Issued by
- the Storm Prediction Center
All 31 counties
Brewster County, TX, Brown County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Crane County, TX, Crockett County, TX, Ector County, TX, Fisher County, TX, Glasscock County, TX, Haskell County, TX, Howard County, TX, Irion County, TX, Jones County, TX, McCulloch County, TX, Menard County, TX, Midland County, TX, Mitchell County, TX, Nolan County, TX, Pecos County, TX, Reagan County, TX, Runnels County, TX, Schleicher County, TX, Shackelford County, TX, Sterling County, TX, Taylor County, TX, Terrell County, TX, Throckmorton County, TX, Tom Green County, TX, Upton County, TX
The radar
The San Angelo radar (KSJT), 119 km from the middle of the area, began a volume at 23:59 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
Midland Regional, TX (KMAF), launched 12:00Z, 11.9 hours before the alert went out and 123 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3563 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 102 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 21, 7:34 PM CDT | Mesoscale Discussion | SPC | Bell, Blanco, Burnet, Coryell, Gillespie, Hamilton and 10 more | 86 min |
| May 22, 12:42 PM CDT | Mesoscale Discussion | SPC | Brown, Callahan, Coke, Coleman, Comanche, Concho and 13 more | 2 hr |
| May 22, 1:47 PM CDT | Tornado Watch | SPC | Bosque, Clay, Collin, Comanche, Cooke, Dallas and 19 more | 7 hr |
| May 22, 2:48 PM CDT | Severe Thunderstorm Watch | SPC | Brewster, Brown, Callahan, Coke, Coleman, Concho and 25 more | 7 hr |
| May 22, 3:47 PM CDT | Mesoscale Discussion | SPC | Cooke, Jack, Montague, Palo Pinto, Parker, Stephens and 2 more | 58 min |
| May 22, 6:34 PM CDT | Mesoscale Discussion | SPC | Callahan, Clay, Collin, Cooke, Dallas, Denton and 14 more | 56 min |
Nearby
Mesoscale Discussions in Texas, 2011Every mesoscale discussion in 2011
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.