Alert archive / Texas / Mesoscale Discussions in 2015
Mesoscale Discussion 379
The Storm Prediction Center issued this mesoscale discussion at Apr 19, 2015, 1:52 PM CDT for 4 counties in Arkansas; 22 parishes in Louisiana; 50 counties in Texas. It was in force for 53 min.
The area
The outline as issued.
The facts
- Issued
- Apr 19, 2015, 1:52 PM CDT (18:52 UTC)
- Expired
- Apr 19, 2015, 2:45 PM CDT
- In force
- 53 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 76 counties
Columbia County, AR, Lafayette County, AR, Little River County, AR, Miller County, AR, Allen Parish, LA, Beauregard Parish, LA, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Calcasieu Parish, LA, Caldwell Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, Evangeline Parish, LA, Grant Parish, LA, Jackson Parish, LA, Jefferson Davis Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Natchitoches Parish, LA, Rapides Parish, LA, Red River Parish, LA, Sabine Parish, LA, Vernon Parish, LA, Webster Parish, LA, Winn Parish, LA, Angelina County, TX, Austin County, TX, Bowie County, TX, Brazoria County, TX, Brazos County, TX, Burleson County, TX, Camp County, TX, Cass County, TX, Chambers County, TX, Cherokee County, TX, Colorado County, TX, Fayette County, TX, Fort Bend County, TX, Galveston County, TX, Gonzales County, TX, Gregg County, TX, Grimes County, TX, Hardin County, TX, Harris County, TX, Harrison County, TX, Houston County, TX, Jasper County, TX, Jefferson County, TX, Lavaca County, TX, Lee County, TX, Leon County, TX, Liberty County, TX, Madison County, TX, Marion County, TX, Montgomery County, TX, Morris County, TX, Nacogdoches County, TX, Newton County, TX, Orange County, TX, Panola County, TX, Polk County, TX, Rusk County, TX, Sabine County, TX, San Augustine County, TX, San Jacinto County, TX, Shelby County, TX, Smith County, TX, Titus County, TX, Trinity County, TX, Tyler County, TX, Upshur County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wharton County, TX
The radar
The Ft Polk radar (KPOE), 171 km from the middle of the area, began a volume at 18:50 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, 6.9 hours before the alert went out and 181 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
- 1670 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 120 m²/s²
- 0-3 km storm-relative helicity
- 122 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 |
|---|---|---|---|---|
| Apr 19, 12:43 PM CDT | Mesoscale Discussion | SPC | Benton, Carroll, Clark, Crawford, Franklin, Garland and 19 more | 2 hr |
| Apr 19, 1:42 PM CDT | Severe Thunderstorm Watch | SPC | Baxter, Benton, Boone, Carroll, Conway, Crawford and 22 more | 6 hr |
| Apr 19, 2:31 PM CDT | Severe Thunderstorm Watch | SPC | Bradley, Calhoun, Clark, Cleveland, Columbia, Dallas and 10 more | 7 hr |
| Apr 19, 4:45 PM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 28 more | 2 hr |
| Apr 19, 5:46 PM CDT | Tornado Watch | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 36 more | 6 hr |
| Apr 19, 2:06 AM CDT | Mesoscale Discussion | SPC | Ascension, Assumption, East Baton Rouge, East Feliciana, Livingston, Orleans and 7 more | 84 min |
| Apr 19, 2:56 AM CDT | Mesoscale Discussion | SPC | Allen, Avoyelles, Bienville, Caldwell, Catahoula, Concordia and 11 more | 94 min |
| Apr 19, 6:56 PM CDT | Mesoscale Discussion | SPC | Cameron | 64 min |
| Apr 18, 7:46 PM CDT | Mesoscale Discussion | SPC | Childress, Cottle, Foard, Hardeman, Wichita, Wilbarger | 89 min |
| Apr 18, 8:24 PM CDT | Mesoscale Discussion | SPC | Anderson, Bastrop, Bell, Blanco, Brazos, Burleson and 25 more | 96 min |
Nearby
Mesoscale Discussions in Texas, 2015Mesoscale Discussions in Louisiana, 2015Mesoscale Discussions in Arkansas, 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.