Alert archive / Louisiana / Mesoscale Discussions in 2017
Mesoscale Discussion 324
The Storm Prediction Center issued this mesoscale discussion at Mar 24, 2017, 9:58 PM CDT for 8 parishes in Louisiana. It was in force for 62 min.
The area
The outline as issued.
The facts
- Issued
- Mar 24, 2017, 9:58 PM CDT (02:58 UTC)
- Expired
- Mar 24, 2017, 11:00 PM CDT
- In force
- 62 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
Counties Allen Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Evangeline Parish, LA, Jefferson Davis Parish, LA, Rapides Parish, LA, Sabine Parish, LA, Vernon Parish, LA
The radar
The Ft Polk radar (KPOE), 19 km from the middle of the area, began a volume at 02:58 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, 3.0 hours before the alert went out and 99 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
- 762 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 666 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 156 m²/s²
- 0-3 km storm-relative helicity
- 230 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 3.4
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 |
|---|---|---|---|---|
| Mar 24, 8:39 PM CDT | Mesoscale Discussion | SPC | Bienville, Bossier, Caddo, Claiborne, De Soto, Red River and 1 more | 66 min |
| Mar 24, 9:14 PM CDT | Severe Thunderstorm Watch | SPC | Bienville, Bossier, Caddo, Claiborne, Jackson, Lincoln and 3 more | 6 hr |
| Mar 24, 9:23 PM CDT | Tornado Watch | SPC | Caldwell, De Soto, Grant, LaSalle, Natchitoches, Red River and 2 more | 6 hr |
| Mar 24, 10:28 PM CDT | Tornado Watch | SPC | Allen, Beauregard, Calcasieu, Evangeline, Jefferson Davis, Rapides and 1 more | 6 hr |
| Mar 24, 11:41 PM CDT | Mesoscale Discussion | SPC | Avoyelles, Caldwell, Catahoula, Concordia, East Carroll, Franklin and 7 more | 64 min |
| Mar 25, 12:05 AM CDT | Severe Thunderstorm Watch | SPC | Catahoula, Concordia, East Carroll, Franklin, Madison, Morehouse and 3 more | 5 hr |
| Mar 25, 2:08 AM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Beauregard, Calcasieu, Cameron, Evangeline and 6 more | 67 min |
| Mar 25, 3:06 AM CDT | Mesoscale Discussion | SPC | Catahoula, Concordia, East Carroll, Franklin, Madison, Richland and 1 more | 54 min |
| Mar 25, 5:25 AM CDT | Mesoscale Discussion | SPC | Allen, Beauregard, Calcasieu, Vernon | 2 hr |
| Mar 25, 12:08 PM CDT | Mesoscale Discussion | SPC | Jefferson, Lafourche, Orleans, Plaquemines, Saint Bernard, Saint Charles and 1 more | 3 hr |
Nearby
Mesoscale Discussions in Louisiana, 2017Every mesoscale discussion in 2017
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.