Alert archive / Georgia / Mesoscale Discussions in 2008

Mesoscale Discussion 218

February 12, 20087 counties in Alabama; 12 counties in Florida; 25 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Feb 12, 2008, 7:11 PM CST for 7 counties in Alabama; 12 counties in Florida; 25 counties in Georgia. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued
Feb 12, 2008, 7:11 PM CST (01:11 UTC)
Expired
Feb 12, 2008, 8:15 PM CST
In force
64 min
Issued by
the Storm Prediction Center
All 44 counties

Barbour County, AL, Coffee County, AL, Dale County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Pike County, AL, Calhoun County, FL, Gadsden County, FL, Holmes County, FL, Jackson County, FL, Jefferson County, FL, Leon County, FL, Liberty County, FL, Madison County, FL, Taylor County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Berrien County, GA, Brooks County, GA, Calhoun County, GA, Clay County, GA, Colquitt County, GA, Cook County, GA, Decatur County, GA, Dougherty County, GA, Early County, GA, Grady County, GA, Irwin County, GA, Lee County, GA, Lowndes County, GA, Miller County, GA, Mitchell County, GA, Quitman County, GA, Randolph County, GA, Seminole County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Turner County, GA, Webster County, GA, Worth County, GA

The radar

The Tallahassee radar (KTLH), 68 km from the middle of the area, began a volume at 01:12 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 00:00Z, 1.2 hours before the alert went out and 69 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-pSkew-T log-p diagram, Tallahassee Rgnl, FL at 00:00Z on 2008-02-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tallahassee Rgnl, FL at 00:00Z on 2008-02-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 115 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
1391 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
115 m²/s²
0-3 km storm-relative helicity
182 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.

IssuedProductOfficeCountiesLasted
Feb 12, 7:09 PM CSTMesoscale DiscussionSPCColbert, Lauderdale, Limestone6 hr
Feb 12, 7:30 PM CSTTornado WatchSPCCoffee, Dale, Geneva, Henry, Houston4 hr
Feb 12, 6:41 PM CSTMesoscale DiscussionSPCAlachua, Bradford, Brevard, Broward, Charlotte, Citrus and 34 more2 hr
Feb 12, 8:39 PM CSTMesoscale DiscussionSPCAlachua, Broward, Charlotte, Citrus, Collier, DeSoto and 25 more96 min
Feb 12, 9:20 PM CSTTornado WatchSPCBrevard, Broward, Charlotte, Citrus, Collier, DeSoto and 30 more9 hr
Feb 12, 10:25 PM CSTMesoscale DiscussionSPCGadsden, Jefferson, Leon, Madison, Taylor, Wakulla95 min
Feb 13, 2:12 AM CSTMesoscale DiscussionSPCAlachua, Brevard, Broward, Charlotte, Citrus, Collier and 30 more93 min
Feb 13, 7:19 AM CSTMesoscale DiscussionSPCBroward, Charlotte, Collier, Glades, Hendry, Lee and 4 more56 min
Feb 13, 9:52 AM CSTMesoscale DiscussionSPCBroward, Collier, Glades, Hendry, Martin, Miami-Dade and 4 more53 min
Feb 13, 10:44 AM CSTSevere Thunderstorm WatchSPCBroward, Collier, Miami-Dade, Monroe, Palm Beach4 hr

Nearby

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