Alert archive / Alabama / Mesoscale Discussions in 2006

Mesoscale Discussion 827

May 10, 200624 counties in Alabama; 11 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at May 10, 2006, 12:21 PM CDT for 24 counties in Alabama; 11 counties in Georgia. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: May 10, 2006, 12:21 PM CDT (17:21 UTC)
Expired: May 10, 2006, 1:45 PM CDT
In force: 84 min
Issued by: the Storm Prediction Center

All 35 counties

Autauga County, AL, Bibb County, AL, Blount County, AL, Calhoun County, AL, Chambers County, AL, Cherokee County, AL, Chilton County, AL, Clay County, AL, Cleburne County, AL, Coosa County, AL, Cullman County, AL, Elmore County, AL, Etowah County, AL, Jefferson County, AL, Lee County, AL, Macon County, AL, Marshall County, AL, Randolph County, AL, Shelby County, AL, St. Clair County, AL, Talladega County, AL, Tallapoosa County, AL, Tuscaloosa County, AL, Walker County, AL, Carroll County, GA, Coweta County, GA, Douglas County, GA, Floyd County, GA, Haralson County, GA, Harris County, GA, Heard County, GA, Meriwether County, GA, Paulding County, GA, Polk County, GA, Troup County, GA

The radar

The Birmingham radar (KBMX), 83 km from the middle of the area, began a volume at 17:22 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 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 12:00Z, 5.4 hours before the alert went out and 83 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 379 J/kg
Mixed-layer CIN: -268 J/kg
Mixed-layer LCL: 531 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 188 m²/s²
0-3 km storm-relative helicity: 222 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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.

Issued	Product	Office	Counties	Lasted
May 9, 9:54 PM CDT	Mesoscale Discussion	SPC	Baldwin, Barbour, Butler, Clarke, Coffee, Conecuh and 13 more	2 hr
May 10, 2:05 AM CDT	Mesoscale Discussion	SPC	Colbert, Fayette, Franklin, Lamar, Lauderdale, Lawrence and 3 more	55 min
May 10, 2:24 AM CDT	Severe Thunderstorm Watch	SPC	Colbert, Fayette, Franklin, Greene, Hale, Lamar and 5 more	5 hr
May 10, 4:01 AM CDT	Mesoscale Discussion	SPC	Fayette, Greene, Hale, Lamar, Pickens, Sumter and 1 more	89 min
May 10, 5:47 AM CDT	Mesoscale Discussion	SPC	Autauga, Barbour, Bibb, Bullock, Butler, Chilton and 30 more	88 min
May 10, 6:32 AM CDT	Severe Thunderstorm Watch	SPC	Autauga, Barbour, Bibb, Bullock, Butler, Chambers and 25 more	6 hr
May 10, 8:31 AM CDT	Mesoscale Discussion	SPC	Fayette, Greene, Lamar, Pickens, Tuscaloosa	89 min
May 10, 9:48 AM CDT	Severe Thunderstorm Watch	SPC	Colbert, Cullman, Fayette, Franklin, Greene, Hale and 12 more	5 hr
May 10, 12:31 PM CDT	Severe Thunderstorm Watch	SPC	Autauga, Bibb, Blount, Bullock, Calhoun, Chambers and 18 more	5 hr
May 10, 12:42 PM CDT	Mesoscale Discussion	SPC	Barbour, Butler, Choctaw, Clarke, Coffee, Conecuh and 11 more	93 min
May 10, 1:45 PM CDT	Tornado Watch	SPC	Autauga, Baldwin, Barbour, Bullock, Butler, Choctaw and 26 more	7 hr
May 10, 2:42 PM CDT	Mesoscale Discussion	SPC	Choctaw, Clarke, Marengo, Sumter, Washington, Wilcox	2 hr
May 10, 3:23 PM CDT	Mesoscale Discussion	SPC	Barbour, Chambers, Lee, Macon, Russell	2 hr
May 10, 4:00 PM CDT	Severe Thunderstorm Watch	SPC	Baker, Ben Hill, Berrien, Bleckley, Brooks, Calhoun and 40 more	7 hr
May 10, 6:20 PM CDT	Mesoscale Discussion	SPC	Appling, Atkinson, Bacon, Brantley, Camden, Charlton and 17 more	55 min
May 10, 6:40 PM CDT	Severe Thunderstorm Watch	SPC	Appling, Atkinson, Bacon, Brantley, Bryan, Camden and 21 more	4 hr

Nearby

Mesoscale Discussions in Alabama, 2006 Mesoscale Discussions in Georgia, 2006 Every mesoscale discussion in 2006

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.