Alert archive / Louisiana / Mesoscale Discussions in 2020
Mesoscale Discussion 25
The Storm Prediction Center issued this mesoscale discussion at Jan 11, 2020, 1:19 AM CST for 13 parishes in Louisiana; Sabine County, Texas. It was in force for 86 min.
The area
The outline as issued.
The facts
- Issued
- Jan 11, 2020, 1:19 AM CST (07:19 UTC)
- Expired
- Jan 11, 2020, 2:45 AM CST
- In force
- 86 min
- Issued by
- the Storm Prediction Center
Counties Bienville Parish, LA, Caldwell Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, Jackson Parish, LA, Lincoln Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Red River Parish, LA, Sabine Parish, LA, Union Parish, LA, Webster Parish, LA, Winn Parish, LA, Sabine County, TX
The radar
The Shreveport radar (KSHV), 89 km from the middle of the area, began a volume at 07:23 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
Shreveport, LA (KSHV), launched 00:00Z, 7.3 hours before the alert went out and 81 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
- 703 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 813 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 379 m²/s²
- 0-3 km storm-relative helicity
- 620 m²/s²
- Significant tornado parameter
- 1.6
- Supercell composite
- 6.1
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 |
|---|---|---|---|---|
| Jan 10, 7:30 PM CST | Mesoscale Discussion | SPC | Bossier, Caddo, Webster | 2 hr |
| Jan 10, 10:40 PM CST | Mesoscale Discussion | SPC | Bienville, Bossier, Caddo, Claiborne, De Soto, Lincoln and 2 more | 2 hr |
| Jan 11, 12:21 AM CST | Mesoscale Discussion | SPC | Acadia, Allen, Beauregard, Calcasieu, Cameron, Evangeline and 11 more | 99 min |
| Jan 11, 12:28 AM CST | Tornado Watch | SPC | Acadia, Allen, Avoyelles, Beauregard, Bienville, Calcasieu and 24 more | 8 hr |
| Jan 11, 2:22 AM CST | Mesoscale Discussion | SPC | Catahoula, Concordia, East Carroll, Franklin, Madison, Richland and 2 more | 53 min |
| Jan 11, 2:37 AM CST | Tornado Watch | SPC | Catahoula, Concordia, East Carroll, Franklin, Madison, Morehouse and 3 more | 8 hr |
| Jan 11, 4:31 AM CST | Mesoscale Discussion | SPC | Acadia, Ascension, Avoyelles, Caldwell, Catahoula, Concordia and 21 more | 59 min |
| Jan 11, 5:18 AM CST | Tornado Watch | SPC | Ascension, Assumption, East Baton Rouge, East Feliciana, Iberville, Jefferson and 16 more | 7 hr |
| Jan 11, 7:39 AM CST | Mesoscale Discussion | SPC | Ascension, Assumption, Jefferson, Lafourche, Livingston, Orleans and 8 more | 96 min |
| Jan 10, 6:30 PM CST | Mesoscale Discussion | SPC | Atascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 16 more | 2 hr |
| Jan 10, 8:49 PM CST | Mesoscale Discussion | SPC | Angelina, Austin, Brazoria, Brazos, Burleson, Chambers and 25 more | 116 min |
| Jan 10, 9:09 PM CST | Tornado Watch | SPC | Austin, Brazoria, Brazos, Burleson, Chambers, Colorado and 17 more | 5 hr |
| Jan 11, 7:34 AM CST | Mesoscale Discussion | SPC | Cooke, Denton, Fannin, Grayson | 116 min |
Nearby
Mesoscale Discussions in Louisiana, 2020Mesoscale Discussions in Texas, 2020Every mesoscale discussion in 2020
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.