Alert archive / Texas / Mesoscale Discussions in 2015
Mesoscale Discussion 1874
The Storm Prediction Center issued this mesoscale discussion at Oct 22, 2015, 1:56 PM CDT for 21 counties in Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Oct 22, 2015, 1:56 PM CDT (18:56 UTC)
- Expired
- Oct 22, 2015, 4:00 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 21 counties
Brewster County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Crockett County, TX, Edwards County, TX, Irion County, TX, McCulloch County, TX, Menard County, TX, Pecos County, TX, Reagan County, TX, Runnels County, TX, Schleicher County, TX, Sterling County, TX, Sutton County, TX, Taylor County, TX, Terrell County, TX, Tom Green County, TX, Upton County, TX, Val Verde County, TX
The radar
The San Angelo radar (KSJT), 155 km from the middle of the area, began a volume at 19:00 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
Del Rio, TX (KDLF), launched 12:00Z, 6.9 hours before the alert went out and 134 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
- 1091 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 560 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 148 m²/s²
- 0-3 km storm-relative helicity
- 324 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 6.1
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 |
|---|---|---|---|---|
| Oct 21, 8:48 PM CDT | Mesoscale Discussion | SPC | Andrews, Cochran, Dawson, Ector, Gaines, Loving and 7 more | 87 min |
| Oct 21, 11:31 PM CDT | Mesoscale Discussion | SPC | Andrews, Borden, Crane, Dawson, Ector, Gaines and 11 more | 59 min |
| Oct 22, 1:06 AM CDT | Tornado Watch | SPC | Andrews, Borden, Brewster, Briscoe, Childress, Coke and 32 more | 8 hr |
| Oct 22, 3:51 AM CDT | Mesoscale Discussion | SPC | Baylor, Childress, Coke, Collingsworth, Cottle, Crockett and 22 more | 99 min |
| Oct 22, 5:47 PM CDT | Mesoscale Discussion | SPC | Concho, Crockett, Edwards, Kimble, Menard, Schleicher and 3 more | 58 min |
| Oct 22, 6:02 PM CDT | Severe Thunderstorm Watch | SPC | Concho, Crockett, Edwards, Irion, Kimble, Menard and 4 more | 3 hr |
Nearby
Mesoscale Discussions in Texas, 2015Every mesoscale discussion in 2015
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.