Alert archive / Alabama / Mesoscale Discussions in 2007

Mesoscale Discussion 147

February 13, 20075 counties in Alabama; Escambia County, Santa Rosa County, Florida; Jackson County, Mississippi

The Storm Prediction Center issued this mesoscale discussion at Feb 13, 2007, 7:24 AM CST for 5 counties in Alabama; Escambia County, Santa Rosa County, Florida; Jackson County, Mississippi. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: Feb 13, 2007, 7:24 AM CST (13:24 UTC)
Expired: Feb 13, 2007, 9:00 AM CST
In force: 96 min
Issued by: the Storm Prediction Center

Counties Baldwin County, AL, Conecuh County, AL, Escambia County, AL, Mobile County, AL, Monroe County, AL, Escambia County, FL, Santa Rosa County, FL, Jackson County, MS

The radar

The Mobile radar (KMOB), 73 km from the middle of the area, began a volume at 13:25 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 1.4 hours before the alert went out and 221 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: 514 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 649 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 149 m²/s²
0-3 km storm-relative helicity: 196 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

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 13, 2:05 AM CST	Mesoscale Discussion	SPC	Mobile, Washington	55 min
Feb 13, 2:43 AM CST	Tornado Watch	SPC	Baldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 6 more	10 hr
Feb 13, 4:50 AM CST	Mesoscale Discussion	SPC	Dallas, Greene, Hale, Marengo, Perry, Sumter	85 min
Feb 13, 5:26 AM CST	Mesoscale Discussion	SPC	Mobile, Washington	94 min
Feb 13, 9:07 AM CST	Tornado Watch	SPC	Coffee, Dale, Geneva, Henry, Houston	7 hr
Feb 13, 11:03 AM CST	Mesoscale Discussion	SPC	Colbert, Franklin, Lamar, Marion	87 min
Feb 13, 12:08 PM CST	Mesoscale Discussion	SPC	Coffee, Dale, Geneva, Henry, Houston	67 min
Feb 13, 12:49 PM CST	Severe Thunderstorm Watch	SPC	Autauga, Bibb, Blount, Chilton, Colbert, Cullman and 21 more	6 hr
Feb 13, 5:09 PM CST	Mesoscale Discussion	SPC	Autauga, Bibb, Blount, Bullock, Butler, Chilton and 21 more	96 min
Feb 13, 5:18 PM CST	Tornado Watch	SPC	Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 29 more	4 hr
Feb 13, 8:52 AM CST	Mesoscale Discussion	SPC	Bay, Calhoun, Franklin, Gadsden, Gulf, Holmes and 8 more	53 min
Feb 13, 10:17 AM CST	Mesoscale Discussion	SPC	Charlotte, DeSoto, Hardee, Hernando, Hillsborough, Lee and 5 more	88 min
Feb 13, 11:54 AM CST	Severe Thunderstorm Watch	SPC	Brevard, Charlotte, Citrus, DeSoto, Flagler, Glades and 25 more	5 hr
Feb 13, 2:15 PM CST	Mesoscale Discussion	SPC	Brevard, Flagler, Glades, Hardee, Highlands, Indian River and 8 more	60 min
Feb 13, 2:34 PM CST	Severe Thunderstorm Watch	SPC	Alachua, Baker, Bradford, Clay, Columbia, Duval and 5 more	5 hr
Feb 12, 9:38 PM CST	Mesoscale Discussion	SPC	Wilkinson	97 min

Nearby

Mesoscale Discussions in Alabama, 2007 Mesoscale Discussions in Florida, 2007 Mesoscale Discussions in Mississippi, 2007 Every mesoscale discussion in 2007

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.