Alert archive / Alabama / Mesoscale Discussions in 2005

Mesoscale Discussion 2495

November 28, 200529 counties in Alabama; 17 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Nov 28, 2005, 9:29 AM CST for 29 counties in Alabama; 17 counties in Mississippi. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Nov 28, 2005, 9:29 AM CST (15:29 UTC)
Expired
Nov 28, 2005, 11:30 AM CST
In force
2 hr
Issued by
the Storm Prediction Center
All 46 counties

Autauga County, AL, Baldwin County, AL, Bibb County, AL, Butler County, AL, Chilton County, AL, Choctaw County, AL, Clarke County, AL, Conecuh County, AL, Cullman County, AL, Dallas County, AL, Escambia County, AL, Fayette County, AL, Greene County, AL, Hale County, AL, Jefferson County, AL, Lamar County, AL, Lowndes County, AL, Marengo County, AL, Mobile County, AL, Monroe County, AL, Perry County, AL, Pickens County, AL, Shelby County, AL, Sumter County, AL, Tuscaloosa County, AL, Walker County, AL, Washington County, AL, Wilcox County, AL, Winston County, AL, Clarke County, MS, Forrest County, MS, George County, MS, Greene County, MS, Harrison County, MS, Jackson County, MS, Jasper County, MS, Jones County, MS, Kemper County, MS, Lamar County, MS, Lauderdale County, MS, Newton County, MS, Noxubee County, MS, Pearl River County, MS, Perry County, MS, Stone County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 147 km from the middle of the area, began a volume at 15:32 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, 3.5 hours before the alert went out and 178 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 12:00Z on 2005-11-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 151 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 12:00Z on 2005-11-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 310 square meters per square second.19395878Sfc1 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
151 J/kg
Mixed-layer CIN
-27 J/kg
Mixed-layer LCL
522 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
310 m²/s²
0-3 km storm-relative helicity
352 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.5

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
Nov 28, 1:31 AM CSTMesoscale DiscussionSPCBaldwin, Butler, Clarke, Coffee, Conecuh, Covington and 10 more89 min
Nov 28, 2:18 AM CSTTornado WatchSPCButler, Coffee, Conecuh, Covington, Crenshaw, Dale and 4 more8 hr
Nov 28, 7:10 AM CSTMesoscale DiscussionSPCCoffee, Covington, Crenshaw, Dale, Geneva, Henry and 2 more95 min
Nov 28, 9:55 AM CSTTornado WatchSPCAutauga, Baldwin, Barbour, Bibb, Blount, Bullock and 61 more8 hr
Nov 28, 1:19 PM CSTMesoscale DiscussionSPCAutauga, Baldwin, Bibb, Blount, Bullock, Butler and 47 more116 min
Nov 28, 4:39 PM CSTMesoscale DiscussionSPCAutauga, Bibb, Blount, Bullock, Butler, Calhoun and 29 more66 min
Nov 28, 5:40 PM CSTTornado WatchSPCAutauga, Barbour, Bullock, Butler, Calhoun, Chambers and 21 more5 hr
Nov 27, 8:44 PM CSTMesoscale DiscussionSPCBenton, DeSoto, Lafayette, Marshall, Panola, Quitman and 1 more91 min
Nov 27, 11:26 PM CSTTornado WatchSPCAlcorn, Benton, Calhoun, Chickasaw, Coahoma, DeSoto and 16 more7 hr
Nov 27, 11:44 PM CSTTornado WatchSPCAdams, Attala, Bolivar, Carroll, Choctaw, Claiborne and 23 more6 hr
Nov 28, 12:43 AM CSTMesoscale DiscussionSPCCoahoma, DeSoto, Panola, Quitman, Tallahatchie, Tate and 1 more62 min
Nov 28, 2:40 AM CSTMesoscale DiscussionSPCAdams, Attala, Carroll, Choctaw, Claiborne, Clay and 25 more95 min
Nov 28, 3:28 AM CSTMesoscale DiscussionSPCAlcorn, Benton, Calhoun, Chickasaw, Itawamba, Lafayette and 12 more62 min
Nov 28, 4:42 AM CSTMesoscale DiscussionSPCAmite, Marion, Pike, Walthall, Wilkinson93 min

Nearby

Mesoscale Discussions in Alabama, 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.