Alert archive / Alabama / Mesoscale Discussions in 2005

Mesoscale Discussion 2282

September 25, 200542 counties in Alabama; 17 counties in Mississippi; 9 counties in Tennessee

The Storm Prediction Center issued this mesoscale discussion at Sep 25, 2005, 6:05 PM CDT for 42 counties in Alabama; 17 counties in Mississippi; 9 counties in Tennessee. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued
Sep 25, 2005, 6:05 PM CDT (23:05 UTC)
Expired
Sep 25, 2005, 7:00 PM CDT
In force
55 min
Issued by
the Storm Prediction Center
All 68 counties

Autauga County, AL, Bibb County, AL, Blount County, AL, Calhoun County, AL, Cherokee County, AL, Chilton County, AL, Choctaw County, AL, Clarke County, AL, Clay County, AL, Colbert County, AL, Coosa County, AL, Cullman County, AL, Dallas County, AL, DeKalb County, AL, Elmore County, AL, Etowah County, AL, Fayette County, AL, Franklin County, AL, Greene County, AL, Hale County, AL, Jackson County, AL, Jefferson County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Lowndes County, AL, Madison County, AL, Marengo County, AL, Marion County, AL, Marshall County, AL, Morgan County, AL, Perry County, AL, Pickens County, AL, Shelby County, AL, St. Clair County, AL, Sumter County, AL, Talladega County, AL, Tuscaloosa County, AL, Walker County, AL, Wilcox County, AL, Winston County, AL, Clarke County, MS, Clay County, MS, Jasper County, MS, Kemper County, MS, Lauderdale County, MS, Leake County, MS, Lowndes County, MS, Monroe County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Rankin County, MS, Scott County, MS, Smith County, MS, Wayne County, MS, Winston County, MS, Bedford County, TN, Coffee County, TN, Franklin County, TN, Giles County, TN, Lawrence County, TN, Lincoln County, TN, Marshall County, TN, Maury County, TN, Moore County, TN

The radar

The Birmingham radar (KBMX), 66 km from the middle of the area, began a volume at 23:08 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, 11.1 hours before the alert went out and 65 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 2005-09-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 126 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 2005-09-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 184 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
126 J/kg
Mixed-layer CIN
-23 J/kg
Mixed-layer LCL
767 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
184 m²/s²
0-3 km storm-relative helicity
245 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.4

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
Sep 25, 3:40 AM CDTTornado WatchSPCChoctaw, Sumter, Washington9 hr
Sep 25, 9:32 AM CDTMesoscale DiscussionSPCColbert, Fayette, Franklin, Greene, Lamar, Lauderdale and 5 more88 min
Sep 25, 11:05 AM CDTTornado WatchSPCAutauga, Bibb, Blount, Calhoun, Chambers, Cherokee and 37 more8 hr
Sep 25, 12:30 PM CDTTornado WatchSPCBibb, Chilton, Choctaw, Clarke, Dallas, Greene and 11 more6 hr
Sep 25, 1:21 PM CDTMesoscale DiscussionSPCAutauga, Bibb, Blount, Calhoun, Cherokee, Chilton and 40 more114 min
Sep 25, 3:41 PM CDTMesoscale DiscussionSPCAutauga, Bibb, Blount, Calhoun, Cherokee, Chilton and 40 more94 min
Sep 25, 6:50 PM CDTTornado WatchSPCBibb, Blount, Cherokee, Choctaw, Cullman, DeKalb and 19 more6 hr
Sep 24, 8:55 PM CDTTornado WatchSPCAdams, Attala, Bolivar, Carroll, Claiborne, Coahoma and 34 more7 hr
Sep 24, 11:31 PM CDTMesoscale DiscussionSPCAdams, Attala, Bolivar, Carroll, Claiborne, Coahoma and 31 more89 min
Sep 25, 3:07 AM CDTMesoscale DiscussionSPCAdams, Attala, Bolivar, Carroll, Claiborne, Coahoma and 34 more53 min

Nearby

Mesoscale Discussions in Alabama, 2005Mesoscale Discussions in Mississippi, 2005Mesoscale Discussions in Tennessee, 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.