Alert archive / Alabama / Mesoscale Discussions in 2008

Mesoscale Discussion 337

March 4, 200816 counties in Alabama; Chattooga County, Dade County, Walker County, Georgia; 12 counties in Tennessee

The Storm Prediction Center issued this mesoscale discussion at Mar 4, 2008, 1:09 AM CST for 16 counties in Alabama; Chattooga County, Dade County, Walker County, Georgia; 12 counties in Tennessee. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued
Mar 4, 2008, 1:09 AM CST (07:09 UTC)
Expired
Mar 4, 2008, 2:15 AM CST
In force
66 min
Issued by
the Storm Prediction Center
All 31 counties

Blount County, AL, Cherokee County, AL, Cullman County, AL, DeKalb County, AL, Etowah County, AL, Fayette County, AL, Jackson County, AL, Jefferson County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marshall County, AL, Morgan County, AL, St. Clair County, AL, Walker County, AL, Winston County, AL, Chattooga County, GA, Dade County, GA, Walker County, GA, Bedford County, TN, Cannon County, TN, Coffee County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Lincoln County, TN, Marion County, TN, Marshall County, TN, Moore County, TN, Sequatchie County, TN, Warren County, TN

The radar

The Northeast Alabama radar (KHTX), 71 km from the middle of the area, began a volume at 07:12 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, 7.2 hours before the alert went out and 143 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.

Skew-T log-pSkew-T log-p diagram, Birmingham, AL at 00:00Z on 2008-03-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 00:00Z on 2008-03-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 110 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1699 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
110 m²/s²
0-3 km storm-relative helicity
273 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 3, 8:59 PM CSTMesoscale DiscussionSPCBaldwin, Butler, Choctaw, Clarke, Conecuh, Crenshaw and 10 more61 min
Mar 3, 9:56 PM CSTTornado WatchSPCBaldwin, Bibb, Butler, Choctaw, Clarke, Conecuh and 16 more7 hr
Mar 4, 1:25 AM CSTTornado WatchSPCAutauga, Barbour, Blount, Bullock, Calhoun, Chambers and 28 more8 hr
Mar 4, 2:30 AM CSTMesoscale DiscussionSPCAutauga, Baldwin, Barbour, Bullock, Butler, Chambers and 23 more90 min
Mar 4, 3:21 AM CSTTornado WatchSPCBaldwin, Butler, Coffee, Conecuh, Covington, Crenshaw and 6 more9 hr
Mar 4, 4:55 AM CSTMesoscale DiscussionSPCBullock, Chambers, Clay, Cleburne, Coosa, Elmore and 6 more95 min
Mar 4, 10:17 AM CSTMesoscale DiscussionSPCCalhoun, Chambers, Cherokee, Clay, Cleburne, DeKalb and 4 more118 min
Mar 4, 10:56 AM CSTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Baker, Baldwin, Ben Hill and 79 more2 hr
Mar 4, 11:04 AM CSTTornado WatchSPCBaldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 96 more8 hr
Mar 4, 1:30 PM CSTMesoscale DiscussionSPCBaldwin, Banks, Barrow, Bibb, Butts, Clarke and 40 more90 min
Mar 4, 3:31 PM CSTTornado WatchSPCLincoln8 hr
Mar 4, 4:48 PM CSTMesoscale DiscussionSPCBryan, Bulloch, Burke, Chatham, Effingham, Liberty and 2 more57 min
Mar 4, 5:27 PM CSTTornado WatchSPCBryan, Bulloch, Burke, Candler, Chatham, Columbia and 11 more7 hr
Mar 4, 9:38 AM CSTMesoscale DiscussionSPCBledsoe, Campbell, Cannon, Clay, Cumberland, DeKalb and 14 more2 hr

Nearby

Mesoscale Discussions in Alabama, 2008Mesoscale Discussions in Tennessee, 2008Mesoscale Discussions in Georgia, 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.