Alert archive / Louisiana / Mesoscale Discussions in 2014
Mesoscale Discussion 1916
The Storm Prediction Center issued this mesoscale discussion at Nov 17, 2014, 2:21 AM CST for Mobile County, Washington County, Alabama; Jefferson Parish, Plaquemines Parish, Saint Bernard Parish, Louisiana; George County, Harrison County, Jackson County, Mississippi. It was in force for 114 min.
The area
The outline as issued.
The facts
- Issued
- Nov 17, 2014, 2:21 AM CST (08:21 UTC)
- Expired
- Nov 17, 2014, 4:15 AM CST
- In force
- 114 min
- Issued by
- the Storm Prediction Center
Counties Mobile County, AL, Washington County, AL, Jefferson Parish, LA, Plaquemines Parish, LA, Saint Bernard Parish, LA, George County, MS, Harrison County, MS, Jackson County, MS
The radar
The Mobile radar (KMOB), 114 km from the middle of the area, began a volume at 08:22 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, 8.4 hours before the alert went out and 74 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
- 496 J/kg
- Mixed-layer CIN
- -36 J/kg
- Mixed-layer LCL
- 825 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 295 m²/s²
- 0-3 km storm-relative helicity
- 414 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 5.3
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 |
|---|---|---|---|---|
| Nov 16, 8:43 PM CST | Mesoscale Discussion | SPC | Washington | 62 min |
| Nov 16, 9:49 PM CST | Tornado Watch | SPC | Mobile, Washington | 7 hr |
| Nov 16, 11:50 PM CST | Mesoscale Discussion | SPC | Choctaw, Clarke, Escambia, Monroe, Washington | 55 min |
| Nov 17, 1:13 AM CST | Mesoscale Discussion | SPC | Baldwin, Barbour, Butler, Coffee, Conecuh, Covington and 8 more | 32 min |
| Nov 17, 1:32 AM CST | Tornado Watch | SPC | Baldwin, Barbour, Bullock, Butler, Clarke, Coffee and 11 more | 7 hr |
| Nov 17, 4:39 AM CST | Mesoscale Discussion | SPC | Baldwin, Barbour, Bullock, Butler, Coffee, Conecuh and 9 more | 66 min |
| Nov 17, 7:43 AM CST | Mesoscale Discussion | SPC | Barbour, Dale, Geneva, Henry, Houston | 92 min |
Nearby
Mesoscale Discussions in Louisiana, 2014Mesoscale Discussions in Mississippi, 2014Mesoscale Discussions in Alabama, 2014Every mesoscale discussion in 2014
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.