Alert archive / Louisiana / Mesoscale Discussions in 2007
Mesoscale Discussion 1964
The Storm Prediction Center issued this mesoscale discussion at Sep 13, 2007, 7:13 AM CDT for 14 parishes in Louisiana. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 13, 2007, 7:13 AM CDT (12:13 UTC)
- Expired
- Sep 13, 2007, 9:15 AM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
Counties Acadia Parish, LA, Ascension Parish, LA, Assumption Parish, LA, Iberia Parish, LA, Iberville Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, Lafourche Parish, LA, Saint James Parish, LA, Saint Martin Parish, LA, St. Mary Parish, LA, Terrebonne Parish, LA, Vermilion Parish, LA, West Baton Rouge Parish, LA
The radar
The Lake Charles radar (KLCH), 139 km from the middle of the area, began a volume at 12:14 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
Jackson, MS (KJAN), launched 12:00Z, 0.2 hours before the alert went out and 326 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
- 1057 J/kg
- Mixed-layer CIN
- -29 J/kg
- Mixed-layer LCL
- 742 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 47 m²/s²
- 0-3 km storm-relative helicity
- 38 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 |
|---|---|---|---|---|
| Sep 12, 9:47 PM CDT | Mesoscale Discussion | SPC | Cameron | 88 min |
| Sep 13, 1:07 AM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Beauregard, Calcasieu, Cameron, Jefferson Davis and 1 more | 3 hr |
| Sep 13, 1:50 AM CDT | Mesoscale Discussion | SPC | Acadia, Calcasieu, Cameron, Iberia, Jefferson Davis, Lafayette and 3 more | 115 min |
| Sep 13, 3:04 AM CDT | Tornado Watch | SPC | Acadia, Calcasieu, Cameron, Iberia, Jefferson Davis, Lafayette and 3 more | 7 hr |
| Sep 13, 6:41 AM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Avoyelles, Beauregard, Evangeline, Iberia and 9 more | 3 hr |
| Sep 13, 1:56 PM CDT | Mesoscale Discussion | SPC | Avoyelles, Catahoula, Concordia, East Baton Rouge, East Feliciana, Iberville and 4 more | 2 hr |
Nearby
Mesoscale Discussions in Louisiana, 2007Every mesoscale discussion in 2007
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.