Alert archive / Alabama / Mesoscale Discussions in 2005

Mesoscale Discussion 2501

November 28, 200535 counties in Alabama; 4 counties in Florida

The Storm Prediction Center issued this mesoscale discussion at Nov 28, 2005, 4:39 PM CST for 35 counties in Alabama; 4 counties in Florida. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued: Nov 28, 2005, 4:39 PM CST (22:39 UTC)
Expired: Nov 28, 2005, 5:45 PM CST
In force: 66 min
Issued by: the Storm Prediction Center

All 39 counties

Autauga County, AL, Bibb County, AL, Blount County, AL, Bullock County, AL, Butler County, AL, Calhoun County, AL, Cherokee County, AL, Chilton County, AL, Clay County, AL, Coffee County, AL, Conecuh County, AL, Coosa County, AL, Covington County, AL, Crenshaw County, AL, Dallas County, AL, DeKalb County, AL, Elmore County, AL, Escambia County, AL, Etowah County, AL, Geneva County, AL, Hale County, AL, Jackson County, AL, Jefferson County, AL, Lowndes County, AL, Macon County, AL, Marengo County, AL, Marshall County, AL, Montgomery County, AL, Perry County, AL, Pike County, AL, Shelby County, AL, St. Clair County, AL, Talladega County, AL, Tallapoosa County, AL, Wilcox County, AL, Holmes County, FL, Okaloosa County, FL, Santa Rosa County, FL, Walton County, FL

The radar

The Birmingham radar (KBMX), 63 km from the middle of the area, began a volume at 22:42 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.

Tornado Watch 886Nov 28, 5:40 PM CST

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 10.7 hours before the alert went out and 64 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: 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.

Issued	Product	Office	Counties	Lasted
Nov 28, 1:31 AM CST	Mesoscale Discussion	SPC	Baldwin, Butler, Clarke, Coffee, Conecuh, Covington and 10 more	89 min
Nov 28, 2:18 AM CST	Tornado Watch	SPC	Butler, Coffee, Conecuh, Covington, Crenshaw, Dale and 4 more	8 hr
Nov 28, 7:10 AM CST	Mesoscale Discussion	SPC	Coffee, Covington, Crenshaw, Dale, Geneva, Henry and 2 more	95 min
Nov 28, 9:29 AM CST	Mesoscale Discussion	SPC	Autauga, Baldwin, Bibb, Butler, Chilton, Choctaw and 23 more	2 hr
Nov 28, 9:55 AM CST	Tornado Watch	SPC	Autauga, Baldwin, Barbour, Bibb, Blount, Bullock and 61 more	8 hr
Nov 28, 1:19 PM CST	Mesoscale Discussion	SPC	Autauga, Baldwin, Bibb, Blount, Bullock, Butler and 47 more	116 min
Nov 28, 5:40 PM CST	Tornado Watch	SPC	Autauga, Barbour, Bullock, Butler, Calhoun, Chambers and 21 more	5 hr

Nearby

Mesoscale Discussions in Alabama, 2005 Mesoscale Discussions in Florida, 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; radar from the NEXRAD Level II archive.