Alert archive / Florida / Mesoscale Discussions in 2008

Mesoscale Discussion 2080

August 12, 20084 counties in Alabama; 12 counties in Florida; Decatur County, Miller County, Seminole County, Georgia

The Storm Prediction Center issued this mesoscale discussion at Aug 12, 2008, 8:51 PM CDT for 4 counties in Alabama; 12 counties in Florida; Decatur County, Miller County, Seminole County, Georgia. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued: Aug 12, 2008, 8:51 PM CDT (01:51 UTC)
Expired: Aug 12, 2008, 9:45 PM CDT
In force: 54 min
Issued by: the Storm Prediction Center

Counties Coffee County, AL, Covington County, AL, Geneva County, AL, Houston County, AL, Bay County, FL, Calhoun County, FL, Escambia County, FL, Gadsden 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, Decatur County, GA, Miller County, GA, Seminole County, GA

The radar

The Eglin Afb radar (KEVX), 52 km from the middle of the area, began a volume at 01:52 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

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 1.9 hours before the alert went out and 203 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: 512 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 755 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: -22 m²/s²
0-3 km storm-relative helicity: -26 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

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
Aug 13, 2:15 AM CDT	Mesoscale Discussion	SPC	Barbour, Coffee, Dale, Geneva, Henry, Houston	60 min
Aug 13, 3:02 AM CDT	Tornado Watch	SPC	Autauga, Barbour, Bullock, Coffee, Dale, Elmore and 10 more	7 hr
Aug 13, 7:23 AM CDT	Mesoscale Discussion	SPC	Barbour, Bullock, Coffee, Dale, Geneva, Henry and 5 more	97 min
Aug 13, 10:00 AM CDT	Tornado Watch	SPC	Baker, Calhoun, Columbia, Dixie, Franklin, Gadsden and 13 more	7 hr
Aug 13, 12:24 PM CDT	Mesoscale Discussion	SPC	Baker, Calhoun, Columbia, Duval, Franklin, Gadsden and 12 more	96 min

Nearby

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