Alert archive / Alabama / Mesoscale Discussions in 2008

Mesoscale Discussion 208

February 12, 20084 states

The Storm Prediction Center issued this mesoscale discussion at Feb 12, 2008, 12:12 PM CST for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Feb 12, 2008, 12:12 PM CST (18:12 UTC)
Expired: Feb 12, 2008, 2:15 PM CST
In force: 2 hr
Issued by: the Storm Prediction Center

All 47 counties

Baldwin County, AL, Barbour County, AL, Bullock County, AL, Butler County, AL, Choctaw County, AL, Clarke County, AL, Coffee County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Dallas County, AL, Escambia County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Lowndes County, AL, Marengo County, AL, Mobile County, AL, Monroe County, AL, Montgomery County, AL, Pike County, AL, Russell County, AL, Washington County, AL, Wilcox County, AL, Bay County, FL, Calhoun County, FL, Escambia County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Liberty County, FL, Okaloosa County, FL, Santa Rosa County, FL, Walton County, FL, Washington County, FL, Clay County, GA, Early County, GA, Quitman County, GA, Seminole County, GA, Clarke County, MS, George County, MS, Greene County, MS, Jackson County, MS, Lauderdale County, MS, Perry County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 94 km from the middle of the area, began a volume at 18:12 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 52Feb 12, 12:35 PM CST

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 6.2 hours before the alert went out and 242 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1161 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 115 m²/s²
0-3 km storm-relative helicity: 147 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
Feb 12, 9:53 AM CST	Mesoscale Discussion	SPC	Mobile	67 min
Feb 12, 12:34 PM CST	Tornado Watch	SPC	Autauga, Baldwin, Barbour, Bullock, Butler, Choctaw and 24 more	7 hr
Feb 12, 2:19 PM CST	Mesoscale Discussion	SPC	Autauga, Baldwin, Butler, Choctaw, Clarke, Coffee and 18 more	116 min
Feb 12, 5:49 PM CST	Mesoscale Discussion	SPC	Autauga, Barbour, Bullock, Butler, Coffee, Conecuh and 13 more	116 min
Feb 12, 1:41 PM CST	Mesoscale Discussion	SPC	Alachua, Brevard, Broward, Charlotte, Citrus, Collier and 28 more	2 hr
Feb 12, 2:18 PM CST	Tornado Watch	SPC	Alachua, Bradford, Brevard, Broward, Charlotte, Citrus and 34 more	8 hr
Feb 12, 10:25 AM CST	Tornado Watch	SPC	Adams, Amite, Covington, Forrest, Franklin, Hancock and 12 more	7 hr
Feb 12, 12:40 PM CST	Mesoscale Discussion	SPC	Amite, Covington, Forrest, Hancock, Harrison, Jackson and 10 more	65 min

Nearby

Mesoscale Discussions in Alabama, 2008 Mesoscale Discussions in Florida, 2008 Mesoscale Discussions in Mississippi, 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.