Alert archive / Texas / Mesoscale Discussions in 2018
Mesoscale Discussion 1601
The Storm Prediction Center issued this mesoscale discussion at Oct 31, 2018, 2:14 PM CDT for Beauregard Parish, Calcasieu Parish, Louisiana; 56 counties in Texas. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Oct 31, 2018, 2:14 PM CDT (19:14 UTC)
- Expired
- Oct 31, 2018, 4:45 PM CDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
All 58 counties
Beauregard Parish, LA, Calcasieu Parish, LA, Anderson County, TX, Angelina County, TX, Aransas County, TX, Austin County, TX, Bastrop County, TX, Brazoria County, TX, Brazos County, TX, Burleson County, TX, Caldwell County, TX, Calhoun County, TX, Chambers County, TX, Cherokee County, TX, Colorado County, TX, DeWitt County, TX, Fayette County, TX, Fort Bend County, TX, Freestone County, TX, Galveston County, TX, Goliad County, TX, Gonzales County, TX, Grimes County, TX, Hardin County, TX, Harris County, TX, Houston County, TX, Jackson County, TX, Jasper County, TX, Jefferson County, TX, Lavaca County, TX, Lee County, TX, Leon County, TX, Liberty County, TX, Madison County, TX, Matagorda County, TX, Milam County, TX, Montgomery County, TX, Nacogdoches County, TX, Newton County, TX, Orange County, TX, Panola County, TX, Polk County, TX, Refugio County, TX, Robertson County, TX, Rusk County, TX, Sabine County, TX, San Augustine County, TX, San Jacinto County, TX, Shelby County, TX, Travis County, TX, Trinity County, TX, Tyler County, TX, Victoria County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wharton County, TX, Williamson County, TX
The radar
The Houston radar (KHGX), 82 km from the middle of the area, began a volume at 19:13 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
Lake Charles Mun, LA (KLCH), launched 12:00Z, 7.2 hours before the alert went out and 245 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
- 649 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 840 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 148 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 5.0
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, 3:02 PM CDT | Tornado Watch | SPC | Bossier, Caddo, De Soto, Sabine, Webster | 9 hr |
| Oct 31, 6:14 PM CDT | Mesoscale Discussion | SPC | Bossier, Caddo, De Soto, Webster | 61 min |
| Oct 31, 7:20 AM CDT | Mesoscale Discussion | SPC | Bosque, Brown, Burnet, Callahan, Coke, Coleman and 34 more | 2 hr |
| Oct 31, 1:36 PM CDT | Mesoscale Discussion | SPC | Brewster, Culberson, El Paso, Hudspeth, Jeff Davis, Pecos and 4 more | 114 min |
| Oct 31, 5:32 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Bexar, Dimmit, Edwards, Frio and 13 more | 2 hr |
Nearby
Mesoscale Discussions in Texas, 2018Mesoscale Discussions in Louisiana, 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.