Alert archive / Louisiana / Mesoscale Discussions in 2023
Mesoscale Discussion 99
The Storm Prediction Center issued this mesoscale discussion at Jan 24, 2023, 6:11 PM CST for 12 parishes in Louisiana. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jan 24, 2023, 6:11 PM CST (00:11 UTC)
- Expired
- Jan 24, 2023, 8:15 PM CST
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Concerning
- Tornado watch 28
Counties Acadia Parish, LA, Avoyelles Parish, LA, Iberia Parish, LA, Iberville Parish, LA, Lafayette Parish, LA, Pointe Coupee Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, St. Mary Parish, LA, Vermilion Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA
The radar
The Lake Charles radar (KLCH), 94 km from the middle of the area, began a volume at 00:16 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
Slidell Radar S, LA (KSIL), launched 00:00Z, 0.2 hours before the alert went out and 253 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
- 550 m above ground
- 0-6 km bulk shear
- 78 kt
- 0-1 km storm-relative helicity
- 805 m²/s²
- 0-3 km storm-relative helicity
- 1093 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
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 24, 10:12 PM CST | Mesoscale Discussion | SPC | Jefferson, Lafourche, Orleans, Saint Bernard, Saint Tammany | 93 min |
Nearby
Mesoscale Discussions in Louisiana, 2023Every mesoscale discussion in 2023
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.