Alert archive / Alabama / Mesoscale Discussions in 2005

Mesoscale Discussion 83

January 13, 20054 states

The Storm Prediction Center issued this mesoscale discussion at Jan 13, 2005, 10:12 AM CST for 4 states. It was in force for 63 min.

The area

The outline as issued.

The facts

Issued: Jan 13, 2005, 10:12 AM CST (16:12 UTC)
Expired: Jan 13, 2005, 11:15 AM CST
In force: 63 min
Issued by: the Storm Prediction Center

All 48 counties

Autauga County, AL, Baldwin County, AL, Barbour County, AL, Bibb County, AL, Bullock County, AL, Butler County, AL, Chambers County, AL, Chilton County, AL, Clarke County, AL, Clay County, AL, Coffee County, AL, Conecuh County, AL, Coosa County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Dallas County, AL, Elmore County, AL, Escambia County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Jefferson County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Mobile County, AL, Monroe County, AL, Montgomery County, AL, Perry County, AL, Pike County, AL, Randolph County, AL, Russell County, AL, Shelby County, AL, Talladega County, AL, Tallapoosa County, AL, Wilcox County, AL, Bay County, FL, Escambia County, FL, Holmes County, FL, Okaloosa County, FL, Santa Rosa County, FL, Walton County, FL, Washington County, FL, Harris County, GA, Muscogee County, GA, Troup County, GA, Jackson County, MS

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Tornado Watch 11Jan 13, 10:45 AM CST

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 4.2 hours before the alert went out and 163 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: 24 J/kg
Mixed-layer CIN: -129 J/kg
Mixed-layer LCL: 891 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 200 m²/s²
0-3 km storm-relative helicity: 301 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.

Issued	Product	Office	Counties	Lasted
Jan 13, 5:45 AM CST	Tornado Watch	SPC	Bibb, Choctaw, Clarke, Greene, Hale, Marengo and 4 more	5 hr
Jan 13, 7:03 AM CST	Mesoscale Discussion	SPC	Blount, Cullman, Fayette, Franklin, Jefferson, Lamar and 7 more	87 min
Jan 13, 7:15 AM CST	Severe Thunderstorm Watch	SPC	Blount, Colbert, Cullman, Fayette, Franklin, Jackson and 12 more	6 hr
Jan 13, 9:53 AM CST	Mesoscale Discussion	SPC	Blount, Calhoun, Cherokee, Cleburne, DeKalb, Etowah and 2 more	2 hr
Jan 13, 10:45 AM CST	Tornado Watch	SPC	Autauga, Baldwin, Barbour, Bibb, Bullock, Butler and 29 more	5 hr
Jan 13, 1:13 PM CST	Mesoscale Discussion	SPC	Barbour, Bullock, Coffee, Covington, Crenshaw, Dale and 6 more	2 hr
Jan 13, 4:40 PM CST	Tornado Watch	SPC	Baldwin, Banks, Bibb, Bleckley, Burke, Butts and 55 more	6 hr
Jan 13, 5:19 PM CST	Mesoscale Discussion	SPC	Appling, Atkinson, Bacon, Baldwin, Brantley, Bulloch and 41 more	41 min
Jan 12, 10:50 PM CST	Severe Thunderstorm Watch	SPC	Bolivar, Coahoma, Tunica	5 hr
Jan 13, 2:25 AM CST	Tornado Watch	SPC	Adams, Amite, Attala, Bolivar, Calhoun, Carroll and 41 more	7 hr
Jan 13, 4:36 AM CST	Mesoscale Discussion	SPC	Adams, Amite, Attala, Calhoun, Carroll, Chickasaw and 38 more	84 min

Nearby

Mesoscale Discussions in Alabama, 2005 Mesoscale Discussions in Florida, 2005 Mesoscale Discussions in Georgia, 2005 Every 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.