Alert archive / Georgia / Mesoscale Discussions in 2008

Mesoscale Discussion 62

January 11, 2008Houston County, Alabama; 9 counties in Florida; 19 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Jan 11, 2008, 4:30 AM CST for Houston County, Alabama; 9 counties in Florida; 19 counties in Georgia. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Jan 11, 2008, 4:30 AM CST (10:30 UTC)
Expired: Jan 11, 2008, 6:00 AM CST
In force: 90 min
Issued by: the Storm Prediction Center

All 29 counties

Houston County, AL, Calhoun County, FL, Gadsden County, FL, Jackson County, FL, Jefferson County, FL, Leon County, FL, Liberty County, FL, Madison County, FL, Wakulla County, FL, Washington County, FL, Baker County, GA, Berrien County, GA, Brooks County, GA, Calhoun County, GA, Colquitt County, GA, Cook County, GA, Decatur County, GA, Dougherty County, GA, Early County, GA, Grady County, GA, Irwin County, GA, Lowndes County, GA, Miller County, GA, Mitchell County, GA, Seminole County, GA, Thomas County, GA, Tift County, GA, Turner County, GA, Worth County, GA

The radar

The Tallahassee radar (KTLH), 62 km from the middle of the area, began a volume at 10:34 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, 10.5 hours before the alert went out and 63 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: 53 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 713 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 130 m²/s²
0-3 km storm-relative helicity: 190 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
Jan 10, 7:52 PM CST	Mesoscale Discussion	SPC	Autauga, Baldwin, Barbour, Bullock, Butler, Calhoun and 33 more	53 min
Jan 10, 9:38 PM CST	Mesoscale Discussion	SPC	Barbour, Bullock, Butler, Chambers, Coffee, Conecuh and 16 more	67 min
Jan 11, 1:21 AM CST	Tornado Watch	SPC	Coffee, Covington, Dale, Geneva, Henry, Houston	7 hr
Jan 10, 6:29 PM CST	Mesoscale Discussion	SPC	Bartow, Catoosa, Chattooga, Cherokee, Dawson, Fannin and 12 more	61 min
Jan 10, 11:18 PM CST	Mesoscale Discussion	SPC	Bibb, Bleckley, Calhoun, Chattahoochee, Clay, Crawford and 23 more	87 min
Jan 10, 11:55 PM CST	Tornado Watch	SPC	Baldwin, Bibb, Bleckley, Chattahoochee, Clay, Crawford and 39 more	6 hr
Jan 11, 2:05 AM CST	Mesoscale Discussion	SPC	Baldwin, Burke, Columbia, Emanuel, Glascock, Greene and 13 more	85 min
Jan 11, 3:27 AM CST	Mesoscale Discussion	SPC	Bleckley, Calhoun, Clay, Crisp, Dodge, Dooly and 14 more	63 min

Nearby

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