Alert archive / Louisiana / Mesoscale Discussions in 2008
Mesoscale Discussion 250
The Storm Prediction Center issued this mesoscale discussion at Feb 17, 2008, 1:33 AM CST for 7 parishes in Louisiana. It was in force for 57 min.
The area
The outline as issued.
The facts
- Issued
- Feb 17, 2008, 1:33 AM CST (07:33 UTC)
- Expired
- Feb 17, 2008, 2:30 AM CST
- In force
- 57 min
- Issued by
- the Storm Prediction Center
Counties Acadia Parish, LA, Allen Parish, LA, Cameron Parish, LA, Evangeline Parish, LA, Jefferson Davis Parish, LA, Rapides Parish, LA, Vermilion Parish, LA
The radar
The Lake Charles radar (KLCH), 33 km from the middle of the area, began a volume at 07:32 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
Lake Charles Mun, LA (KLCH), launched 00:00Z, 7.6 hours before the alert went out and 31 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
- 188 J/kg
- Mixed-layer CIN
- -263 J/kg
- Mixed-layer LCL
- 634 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 354 m²/s²
- 0-3 km storm-relative helicity
- 445 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.7
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 |
|---|---|---|---|---|
| Feb 16, 7:18 PM CST | Mesoscale Discussion | SPC | Allen, Beauregard, Calcasieu, Cameron, De Soto, Jefferson Davis and 4 more | 87 min |
| Feb 16, 8:25 PM CST | Tornado Watch | SPC | Acadia, Allen, Beauregard, Calcasieu, Cameron, Evangeline and 4 more | 6 hr |
| Feb 16, 10:41 PM CST | Mesoscale Discussion | SPC | Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Caldwell and 26 more | 94 min |
| Feb 16, 11:30 PM CST | Severe Thunderstorm Watch | SPC | Ascension, Assumption, Avoyelles, Caldwell, Catahoula, Concordia and 25 more | 6 hr |
| Feb 17, 2:13 AM CST | Mesoscale Discussion | SPC | Ascension, Assumption, East Baton Rouge, East Feliciana, Iberia, Iberville and 19 more | 32 min |
| Feb 17, 2:45 AM CST | Tornado Watch | SPC | Ascension, Assumption, East Baton Rouge, East Feliciana, Iberia, Iberville and 19 more | 5 hr |
| Feb 17, 7:13 AM CST | Mesoscale Discussion | SPC | Jefferson, Orleans, Plaquemines, Saint Bernard, Saint Tammany | 62 min |
Nearby
Mesoscale Discussions in Louisiana, 2008Every mesoscale discussion in 2008
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.