Alert archive / Alabama / Mesoscale Discussions in 2005

Mesoscale Discussion 514

April 6, 20054 states

The Storm Prediction Center issued this mesoscale discussion at Apr 6, 2005, 11:50 PM CDT for 4 states. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued
Apr 6, 2005, 11:50 PM CDT (04:50 UTC)
Expired
Apr 7, 2005, 12:45 AM CDT
In force
55 min
Issued by
the Storm Prediction Center
All 76 counties

Autauga County, AL, Baldwin County, AL, Barbour County, AL, Bibb County, AL, Blount County, AL, Bullock County, AL, Butler County, AL, Calhoun County, AL, Chambers County, AL, Cherokee County, AL, Chilton County, AL, Choctaw County, AL, Clarke County, AL, Clay County, AL, Cleburne County, AL, Conecuh County, AL, Coosa County, AL, Crenshaw County, AL, Cullman County, AL, Dallas County, AL, DeKalb County, AL, Elmore County, AL, Escambia County, AL, Etowah County, AL, Fayette County, AL, Greene County, AL, Hale County, AL, Jefferson County, AL, Lamar County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Marengo County, AL, Marion County, AL, Marshall County, AL, Mobile County, AL, Monroe County, AL, Montgomery County, AL, Perry County, AL, Pickens County, AL, Pike County, AL, Randolph County, AL, Russell County, AL, Shelby County, AL, St. Clair County, AL, Sumter County, AL, Talladega County, AL, Tallapoosa County, AL, Tuscaloosa County, AL, Walker County, AL, Washington County, AL, Wilcox County, AL, Winston County, AL, Carroll County, GA, Chattahoochee County, GA, Chattooga County, GA, Coweta County, GA, Floyd County, GA, Haralson County, GA, Harris County, GA, Heard County, GA, Muscogee County, GA, Paulding County, GA, Polk County, GA, Troup County, GA, Washington Parish, LA, Clarke County, MS, Forrest County, MS, George County, MS, Greene County, MS, Jones County, MS, Lamar County, MS, Pearl River County, MS, Perry County, MS, Stone County, MS, Wayne County, MS

The radar

The Birmingham radar (KBMX), 129 km from the middle of the area, began a volume at 04:52 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

Birmingham, AL (KBMX), launched 00:00Z, 4.8 hours before the alert went out and 128 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 2005-04-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 31 joules per kilogram.LCLLFCEL10008507005003002001001 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 2005-04-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 341 square meters per square second.1939587897Sfc1 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
31 J/kg
Mixed-layer CIN
-56 J/kg
Mixed-layer LCL
831 m above ground
0-6 km bulk shear
73 kt
0-1 km storm-relative helicity
341 m²/s²
0-3 km storm-relative helicity
365 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

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
Apr 6, 7:00 PM CDTSevere Thunderstorm WatchSPCCoffee, Dale, Geneva, Henry, Houston4 hr
Apr 6, 10:36 PM CDTMesoscale DiscussionSPCCoffee, Dale, Geneva, Henry, Houston54 min
Apr 7, 11:03 AM CDTMesoscale DiscussionSPCBlount, Calhoun, Chambers, Cherokee, Clay, Cleburne and 12 more117 min
Apr 7, 10:25 AM CDTSevere Thunderstorm WatchSPCCamden, Charlton, Glynn, McIntosh8 hr
Apr 7, 12:00 PM CDTMesoscale DiscussionSPCCamden, Charlton, Glynn2 hr
Apr 7, 3:18 PM CDTMesoscale DiscussionSPCCamden, Charlton, Glynn87 min
Apr 7, 4:52 PM CDTMesoscale DiscussionSPCAtkinson, Bacon, Baker, Baldwin, Barrow, Ben Hill and 92 more23 min
Apr 6, 8:42 PM CDTMesoscale DiscussionSPCBenton, Calhoun, Chickasaw, Coahoma, DeSoto, Lafayette and 12 more33 min

Nearby

Mesoscale Discussions in Alabama, 2005Mesoscale Discussions in Georgia, 2005Mesoscale Discussions in Mississippi, 2005Every mesoscale discussion in 2005

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.