Alert archive / Texas / Mesoscale Discussions in 2018
Mesoscale Discussion 1599
The Storm Prediction Center issued this mesoscale discussion at Oct 31, 2018, 7:20 AM CDT for 40 counties in Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Oct 31, 2018, 7:20 AM CDT (12:20 UTC)
- Expired
- Oct 31, 2018, 9:45 AM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 40 counties
Bosque County, TX, Brown County, TX, Burnet County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Comanche County, TX, Concho County, TX, Coryell County, TX, Crockett County, TX, Eastland County, TX, Erath County, TX, Fisher County, TX, Glasscock County, TX, Hamilton County, TX, Haskell County, TX, Howard County, TX, Irion County, TX, Jones County, TX, Kimble County, TX, Lampasas County, TX, Llano County, TX, Mason County, TX, McCulloch County, TX, Menard County, TX, Mills County, TX, Mitchell County, TX, Nolan County, TX, Reagan County, TX, Runnels County, TX, San Saba County, TX, Schleicher County, TX, Shackelford County, TX, Stephens County, TX, Sterling County, TX, Sutton County, TX, Taylor County, TX, Throckmorton County, TX, Tom Green County, TX, Upton County, TX
The radar
The San Angelo radar (KSJT), 42 km from the middle of the area, began a volume at 12:22 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, 0.3 hours before the alert went out and 256 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
- 1529 J/kg
- Mixed-layer CIN
- -126 J/kg
- Mixed-layer LCL
- 534 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 143 m²/s²
- 0-3 km storm-relative helicity
- 223 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 1.6
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 31, 1:36 PM CDT | Mesoscale Discussion | SPC | Brewster, Culberson, El Paso, Hudspeth, Jeff Davis, Pecos and 4 more | 114 min |
| Oct 31, 2:14 PM CDT | Mesoscale Discussion | SPC | Anderson, Angelina, Aransas, Austin, Bastrop, Brazoria and 50 more | 3 hr |
| Oct 31, 3:02 PM CDT | Tornado Watch | SPC | Anderson, Angelina, Austin, Bastrop, Bowie, Brazoria and 57 more | 9 hr |
| Oct 31, 5:32 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Bexar, Dimmit, Edwards, Frio and 13 more | 2 hr |
| Oct 31, 6:14 PM CDT | Mesoscale Discussion | SPC | Anderson, Angelina, Austin, Bowie, Brazos, Burleson and 41 more | 61 min |
Nearby
Mesoscale Discussions in Texas, 2018Every mesoscale discussion in 2018
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.