Alert archive / Louisiana / Mesoscale Discussions in 2013
Mesoscale Discussion 158
The Storm Prediction Center issued this mesoscale discussion at Feb 12, 2013, 3:35 PM CST for 4 states. It was in force for 85 min.
The area
The outline as issued.
The facts
- Issued
- Feb 12, 2013, 3:35 PM CST (21:35 UTC)
- Expired
- Feb 12, 2013, 5:00 PM CST
- In force
- 85 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 35 counties
Baldwin County, AL, Conecuh County, AL, Escambia County, AL, Mobile County, AL, Washington County, AL, Escambia County, FL, Okaloosa County, FL, Santa Rosa County, FL, Ascension Parish, LA, Assumption Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Jefferson Parish, LA, Livingston Parish, LA, Orleans Parish, LA, Saint Bernard Parish, LA, Saint Charles Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Lamar County, MS, Marion County, MS, Pearl River County, MS, Perry County, MS, Stone County, MS, Walthall County, MS
The radar
The Mobile radar (KMOB), 85 km from the middle of the area, began a volume at 21:35 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, 9.6 hours before the alert went out and 238 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
- 819 m above ground
- 0-6 km bulk shear
- 74 kt
- 0-1 km storm-relative helicity
- 127 m²/s²
- 0-3 km storm-relative helicity
- 291 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 |
|---|---|---|---|---|
| Feb 11, 11:43 PM CST | Mesoscale Discussion | SPC | Baldwin, Butler, Choctaw, Clarke, Conecuh, Dallas and 7 more | 92 min |
| Feb 12, 1:57 PM CST | Mesoscale Discussion | SPC | Baldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 6 more | 63 min |
| Feb 12, 5:17 PM CST | Mesoscale Discussion | SPC | Baldwin, Covington, Escambia, Geneva, Houston, Mobile | 58 min |
| Feb 11, 6:36 PM CST | Mesoscale Discussion | SPC | Bay, Liberty | 84 min |
| Feb 12, 11:54 AM CST | Mesoscale Discussion | SPC | Franklin, Madison, Tensas | 96 min |
Nearby
Mesoscale Discussions in Louisiana, 2013Mesoscale Discussions in Mississippi, 2013Mesoscale Discussions in Alabama, 2013Every mesoscale discussion in 2013
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.