Alert archive / Alabama / Mesoscale Discussions in 2005

Mesoscale Discussion 673

April 22, 200520 counties in Alabama; 13 counties in Georgia; Greene County, Wayne County, Mississippi

The Storm Prediction Center issued this mesoscale discussion at Apr 22, 2005, 11:14 PM CDT for 20 counties in Alabama; 13 counties in Georgia; Greene County, Wayne County, Mississippi. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued: Apr 22, 2005, 11:14 PM CDT (04:14 UTC)
Expired: Apr 23, 2005, 12:45 AM CDT
In force: 91 min
Issued by: the Storm Prediction Center

All 35 counties

Autauga County, AL, Bullock County, AL, Butler County, AL, Chambers County, AL, Clarke County, AL, Conecuh County, AL, Coosa County, AL, Crenshaw County, AL, Dallas County, AL, Elmore County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Mobile County, AL, Monroe County, AL, Montgomery County, AL, Randolph County, AL, Tallapoosa County, AL, Washington County, AL, Wilcox County, AL, Carroll County, GA, Clayton County, GA, Coweta County, GA, Douglas County, GA, Fayette County, GA, Fulton County, GA, Harris County, GA, Heard County, GA, Meriwether County, GA, Muscogee County, GA, Pike County, GA, Talbot County, GA, Troup County, GA, Greene County, MS, Wayne County, MS

The radar

The Birmingham radar (KBMX), 122 km from the middle of the area, began a volume at 04:17 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, 4.2 hours before the alert went out and 123 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: 1705 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 1219 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 194 m²/s²
0-3 km storm-relative helicity: 223 m²/s²
Significant tornado parameter: 1.7
Supercell composite: 18.6

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
Apr 22, 8:28 PM CDT	Mesoscale Discussion	SPC	Autauga, Baldwin, Bibb, Bullock, Butler, Chambers and 30 more	2 hr
Apr 22, 8:50 PM CDT	Severe Thunderstorm Watch	SPC	Autauga, Baldwin, Barbour, Bullock, Butler, Chambers and 27 more	5 hr
Apr 22, 10:01 PM CDT	Mesoscale Discussion	SPC	Dale, Geneva, Henry, Houston	89 min
Apr 22, 9:15 PM CDT	Mesoscale Discussion	SPC	Brantley, Camden, Charlton, Glynn, McIntosh, Pierce	60 min
Apr 22, 9:43 PM CDT	Mesoscale Discussion	SPC	Cobb, Forsyth, Paulding, Polk	62 min
Apr 22, 11:15 PM CDT	Severe Thunderstorm Watch	SPC	Decatur, Echols	4 hr
Apr 22, 10:29 PM CDT	Mesoscale Discussion	SPC	Adams, Amite, Copiah, Covington, Forrest, Franklin and 10 more	91 min
Apr 22, 11:20 PM CDT	Mesoscale Discussion	SPC	Pearl River	55 min

Nearby

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