Alert archive / Texas / Mesoscale Discussions in 2014
Mesoscale Discussion 1807
The Storm Prediction Center issued this mesoscale discussion at Oct 2, 2014, 11:05 PM CDT for 29 parishes in Louisiana; Amite County, Wilkinson County, Mississippi; 47 counties in Texas. It was in force for 55 min.
The area
The outline as issued.
The facts
- Issued
- Oct 2, 2014, 11:05 PM CDT (04:05 UTC)
- Expired
- Oct 3, 2014, 12:00 AM CDT
- In force
- 55 min
- Issued by
- the Storm Prediction Center
All 78 counties
Acadia Parish, LA, Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Caldwell Parish, LA, Cameron Parish, LA, De Soto Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Evangeline Parish, LA, Grant Parish, LA, Iberville Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, LaSalle Parish, LA, Natchitoches Parish, LA, Pointe Coupee Parish, LA, Rapides Parish, LA, Red River Parish, LA, Sabine Parish, LA, Saint Helena Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, Vermilion Parish, LA, Vernon Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Winn Parish, LA, Amite County, MS, Wilkinson County, MS, Angelina County, TX, Austin County, TX, Bastrop County, TX, Blanco County, TX, Brazoria County, TX, Brazos County, TX, Burleson County, TX, Caldwell County, TX, Chambers County, TX, Colorado County, TX, Comal County, TX, DeWitt County, TX, Fayette County, TX, Fort Bend County, TX, Galveston County, TX, Gonzales County, TX, Grimes County, TX, Guadalupe County, TX, Hardin County, TX, Harris County, TX, Hays County, TX, Houston County, TX, Jackson County, TX, Jasper County, TX, Jefferson County, TX, Lavaca County, TX, Lee County, TX, Liberty County, TX, Madison County, TX, Montgomery County, TX, Nacogdoches County, TX, Newton County, TX, Orange County, TX, Panola County, TX, Polk 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, Walker County, TX, Waller County, TX, Washington County, TX, Wharton County, TX, Williamson County, TX
The radar
The Houston radar (KHGX), 126 km from the middle of the area, began a volume at 04:07 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 00:00Z, 4.1 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
- 2657 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 674 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 90 m²/s²
- 0-3 km storm-relative helicity
- 98 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 6.4
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 2, 7:33 PM CDT | Mesoscale Discussion | SPC | Allen, Beauregard, Calcasieu, Caldwell, De Soto, Evangeline and 9 more | 57 min |
| Oct 2, 7:35 PM CDT | Mesoscale Discussion | SPC | Bossier, Claiborne, Morehouse, Union, Webster, West Carroll | 115 min |
| Oct 2, 8:04 PM CDT | Severe Thunderstorm Watch | SPC | Beauregard, Caldwell, De Soto, Grant, LaSalle, Natchitoches and 5 more | 7 hr |
| Oct 2, 9:26 PM CDT | Mesoscale Discussion | SPC | East Carroll, Madison, Morehouse, West Carroll | 2 hr |
| Oct 2, 10:11 PM CDT | Tornado Watch | SPC | Catahoula, Concordia, Franklin, Madison, Richland, Tensas | 5 hr |
| Oct 2, 11:36 PM CDT | Severe Thunderstorm Watch | SPC | Acadia, Allen, Ascension, Assumption, Avoyelles, Calcasieu and 18 more | 5 hr |
| Oct 2, 11:50 PM CDT | Mesoscale Discussion | SPC | Catahoula, Concordia, East Carroll, Franklin, Madison, Richland and 2 more | 115 min |
Nearby
Mesoscale Discussions in Texas, 2014Mesoscale Discussions in Louisiana, 2014Mesoscale Discussions in Mississippi, 2014Every mesoscale discussion in 2014
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.