Alert archive / Alabama / Mesoscale Discussions in 2008
Mesoscale Discussion 2435
The Storm Prediction Center issued this mesoscale discussion at Dec 9, 2008, 11:42 PM CST for 9 counties in Alabama. It was in force for 63 min.
The area
The outline as issued.
The facts
- Issued
- Dec 9, 2008, 11:42 PM CST (05:42 UTC)
- Expired
- Dec 10, 2008, 12:45 AM CST
- In force
- 63 min
- Issued by
- the Storm Prediction Center
Counties Blount County, AL, Chilton County, AL, Coosa County, AL, Cullman County, AL, Jefferson County, AL, Marshall County, AL, Shelby County, AL, St. Clair County, AL, Talladega County, AL
The radar
The Birmingham radar (KBMX), 69 km from the middle of the area, began a volume at 05:43 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Birmingham, AL (KBMX), launched 00:00Z, 5.7 hours before the alert went out and 68 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
- 167 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 741 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 336 m²/s²
- 0-3 km storm-relative helicity
- 421 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.8
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 |
|---|---|---|---|---|
| Dec 9, 6:15 PM CST | Mesoscale Discussion | SPC | Clarke, Escambia, Mobile, Monroe, Washington | 90 min |
| Dec 9, 8:03 PM CST | Tornado Watch | SPC | Baldwin, Bibb, Blount, Choctaw, Clarke, Dallas and 18 more | 6 hr |
| Dec 9, 9:51 PM CST | Mesoscale Discussion | SPC | Autauga, Butler, Chilton, Coosa, Crenshaw, Elmore and 4 more | 54 min |
| Dec 10, 1:25 AM CST | Mesoscale Discussion | SPC | Autauga, Baldwin, Bibb, Blount, Bullock, Butler and 42 more | 65 min |
| Dec 10, 1:41 AM CST | Tornado Watch | SPC | Autauga, Baldwin, Barbour, Bibb, Blount, Bullock and 40 more | 5 hr |
| Dec 10, 3:31 AM CST | Mesoscale Discussion | SPC | Autauga, Baldwin, Bibb, Blount, Butler, Calhoun and 31 more | 59 min |
| Dec 10, 5:29 AM CST | Mesoscale Discussion | SPC | Autauga, Baldwin, Barbour, Bullock, Butler, Calhoun and 31 more | 61 min |
| Dec 10, 6:47 AM CST | Tornado Watch | SPC | Autauga, Baldwin, Barbour, Bullock, Butler, Chambers and 22 more | 7 hr |
| Dec 10, 10:45 AM CST | Mesoscale Discussion | SPC | Barbour, Bullock, Coffee, Covington, Dale, Geneva and 5 more | 2 hr |
| Dec 10, 1:08 PM CST | Mesoscale Discussion | SPC | Houston | 67 min |
Nearby
Mesoscale Discussions in Alabama, 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.