Alert archive / Alabama / Mesoscale Discussions in 2008

Mesoscale Discussion 336

March 3, 20084 states

The Storm Prediction Center issued this mesoscale discussion at Mar 3, 2008, 8:59 PM CST for 4 states. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued: Mar 3, 2008, 8:59 PM CST (02:59 UTC)
Expired: Mar 3, 2008, 10:00 PM CST
In force: 61 min
Issued by: the Storm Prediction Center

All 24 counties

Baldwin County, AL, Butler County, AL, Choctaw County, AL, Clarke County, AL, Conecuh County, AL, Crenshaw County, AL, Dallas County, AL, Escambia County, AL, Greene County, AL, Hale County, AL, Marengo County, AL, Mobile County, AL, Monroe County, AL, Sumter County, AL, Washington County, AL, Wilcox County, AL, Escambia County, FL, Santa Rosa County, FL, Saint Bernard Parish, LA, George County, MS, Greene County, MS, Harrison County, MS, Jackson County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 18 km from the middle of the area, began a volume at 03:03 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 93Mar 3, 9:55 PM CST

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 3.0 hours before the alert went out and 162 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: 1687 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 491 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 488 m²/s²
0-3 km storm-relative helicity: 583 m²/s²
Significant tornado parameter: 4.4
Supercell composite: 22.7

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 3, 9:56 PM CST	Tornado Watch	SPC	Baldwin, Bibb, Butler, Choctaw, Clarke, Conecuh and 16 more	7 hr
Mar 4, 1:09 AM CST	Mesoscale Discussion	SPC	Blount, Cherokee, Cullman, DeKalb, Etowah, Fayette and 10 more	66 min
Mar 4, 1:25 AM CST	Tornado Watch	SPC	Autauga, Barbour, Blount, Bullock, Calhoun, Chambers and 28 more	8 hr
Mar 4, 2:30 AM CST	Mesoscale Discussion	SPC	Autauga, Baldwin, Barbour, Bullock, Butler, Chambers and 23 more	90 min
Mar 4, 3:21 AM CST	Tornado Watch	SPC	Baldwin, Butler, Coffee, Conecuh, Covington, Crenshaw and 6 more	9 hr
Mar 4, 4:55 AM CST	Mesoscale Discussion	SPC	Bullock, Chambers, Clay, Cleburne, Coosa, Elmore and 6 more	95 min
Mar 4, 10:17 AM CST	Mesoscale Discussion	SPC	Calhoun, Chambers, Cherokee, Clay, Cleburne, DeKalb and 4 more	118 min
Mar 4, 10:56 AM CST	Mesoscale Discussion	SPC	Baker, Columbia, Gadsden, Hamilton, Jackson, Jefferson and 4 more	2 hr

Nearby

Mesoscale Discussions in Alabama, 2008 Mesoscale Discussions in Mississippi, 2008 Mesoscale Discussions in Florida, 2008 Every mesoscale discussion in 2008

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.