Alert archive / Georgia / Mesoscale Discussions in 2007

Mesoscale Discussion 102

February 1, 2007Houston County, Alabama; 14 counties in Florida; 20 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Feb 1, 2007, 12:18 PM CST for Houston County, Alabama; 14 counties in Florida; 20 counties in Georgia. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued: Feb 1, 2007, 12:18 PM CST (18:18 UTC)
Expired: Feb 1, 2007, 1:15 PM CST
In force: 57 min
Issued by: the Storm Prediction Center

All 35 counties

Houston County, AL, Bay County, FL, Calhoun County, FL, Franklin County, FL, Gadsden County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Jefferson County, FL, Leon County, FL, Liberty County, FL, Madison County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Ben Hill County, GA, Berrien County, GA, Brooks County, GA, Colquitt County, GA, Cook County, GA, Decatur County, GA, Dougherty County, GA, Early County, GA, Grady County, GA, Irwin County, GA, Lanier 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), 60 km from the middle of the area, began a volume at 18:18 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.

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 6.3 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 616 m above ground
0-6 km bulk shear: 77 kt
0-1 km storm-relative helicity: 499 m²/s²
0-3 km storm-relative helicity: 607 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

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 31, 11:43 PM CST	Mesoscale Discussion	SPC	DeKalb, Jackson, Limestone, Madison, Marshall, Morgan	6 hr
Feb 1, 7:56 AM CST	Mesoscale Discussion	SPC	Baldwin, Covington, Escambia, Geneva, Houston, Mobile	2 hr
Feb 1, 12:52 PM CST	Tornado Watch	SPC	Coffee, Dale, Geneva, Henry, Houston	8 hr
Feb 1, 2:44 PM CST	Mesoscale Discussion	SPC	Alachua, Baker, Bay, Bradford, Calhoun, Columbia and 19 more	91 min
Feb 1, 3:17 PM CST	Tornado Watch	SPC	Alachua, Baker, Bradford, Clay, Columbia, Duval and 10 more	9 hr
Feb 1, 5:52 PM CST	Mesoscale Discussion	SPC	Alachua, Baker, Bay, Bradford, Calhoun, Citrus and 27 more	83 min
Feb 1, 6:02 AM CST	Mesoscale Discussion	SPC	Banks, Dawson, Elbert, Fannin, Franklin, Gilmer and 11 more	6 hr

Nearby

Mesoscale Discussions in Georgia, 2007 Mesoscale Discussions in Florida, 2007 Mesoscale Discussions in Alabama, 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.