Alert archive / Alabama / Mesoscale Discussions in 2005

Mesoscale Discussion 446

March 30, 200517 counties in Alabama

The Storm Prediction Center issued this mesoscale discussion at Mar 30, 2005, 8:55 PM CST for 17 counties in Alabama. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued: Mar 30, 2005, 8:55 PM CST (02:55 UTC)
Expired: Mar 30, 2005, 10:30 PM CST
In force: 95 min
Issued by: the Storm Prediction Center

Counties Autauga County, AL, Baldwin County, AL, Bibb County, AL, Butler County, AL, Chilton County, AL, Conecuh County, AL, Coosa County, AL, Crenshaw County, AL, Dallas County, AL, Elmore County, AL, Escambia County, AL, Lowndes County, AL, Monroe County, AL, Montgomery County, AL, Perry County, AL, Shelby County, AL, Wilcox County, AL

The radar

The Birmingham radar (KBMX), 147 km from the middle of the area, began a volume at 02:56 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.

Severe Thunderstorm Watch 110Mar 30, 9:15 PM CST

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 2.9 hours before the alert went out and 147 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: 135 J/kg
Mixed-layer CIN: -297 J/kg
Mixed-layer LCL: 1597 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 109 m²/s²
0-3 km storm-relative helicity: 268 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
Mar 30, 7:56 PM CST	Mesoscale Discussion	SPC	Colbert, Franklin, Lamar, Lauderdale, Lawrence, Limestone and 2 more	94 min
Mar 30, 9:15 PM CST	Severe Thunderstorm Watch	SPC	Autauga, Bibb, Butler, Calhoun, Chilton, Clarke and 22 more	7 hr
Mar 30, 9:50 PM CST	Severe Thunderstorm Watch	SPC	Blount, Colbert, Cullman, Fayette, Franklin, Jackson and 10 more	6 hr
Mar 30, 10:11 PM CST	Mesoscale Discussion	SPC	Choctaw, Greene, Pickens, Sumter	94 min
Mar 31, 12:53 AM CST	Mesoscale Discussion	SPC	Autauga, Bibb, Bullock, Butler, Chambers, Chilton and 21 more	97 min
Mar 31, 1:15 AM CST	Severe Thunderstorm Watch	SPC	Autauga, Barbour, Bibb, Blount, Bullock, Butler and 46 more	7 hr
Mar 31, 2:08 AM CST	Mesoscale Discussion	SPC	Colbert, DeKalb, Franklin, Jackson, Lauderdale, Lawrence and 4 more	97 min
Mar 31, 5:34 AM CST	Mesoscale Discussion	SPC	Autauga, Bibb, Bullock, Butler, Calhoun, Chambers and 34 more	116 min
Mar 31, 6:53 AM CST	Mesoscale Discussion	SPC	Autauga, Barbour, Bibb, Bullock, Butler, Calhoun and 35 more	67 min
Mar 31, 7:30 AM CST	Severe Thunderstorm Watch	SPC	Barbour, Bullock, Butler, Coffee, Conecuh, Covington and 12 more	8 hr
Mar 31, 10:32 AM CST	Mesoscale Discussion	SPC	Barbour, Bullock, Butler, Coffee, Conecuh, Covington and 7 more	88 min
Mar 31, 2:15 PM CST	Mesoscale Discussion	SPC	Baldwin, Geneva, Houston	2 hr

Nearby

Mesoscale Discussions in Alabama, 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.