Alert archive / Florida / Mesoscale Discussions in 2007

Mesoscale Discussion 2167

November 26, 2007Houston County, Alabama; 10 counties in Florida; 8 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Nov 26, 2007, 7:40 AM CST for Houston County, Alabama; 10 counties in Florida; 8 counties in Georgia. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Nov 26, 2007, 7:40 AM CST (13:40 UTC)
Expired: Nov 26, 2007, 9:45 AM CST
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Houston County, AL, Bay County, FL, Calhoun County, FL, Gadsden County, FL, Gulf County, FL, Jackson County, FL, Jefferson County, FL, Leon County, FL, Liberty County, FL, Wakulla County, FL, Washington County, FL, Baker County, GA, Colquitt County, GA, Decatur County, GA, Grady County, GA, Miller County, GA, Mitchell County, GA, Seminole County, GA, Thomas County, GA

The radar

The Tallahassee radar (KTLH), 45 km from the middle of the area, began a volume at 13:39 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 12:00Z, 1.7 hours before the alert went out and 47 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: 33 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 517 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 234 m²/s²
0-3 km storm-relative helicity: 233 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
Nov 25, 9:57 PM CST	Mesoscale Discussion	SPC	Baldwin, Covington, Escambia, Geneva	63 min

Nearby

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