Alert archive / Georgia / Mesoscale Discussions in 2014

Mesoscale Discussion 1992

December 24, 2014Houston County, Alabama; 19 counties in Florida; 38 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Dec 24, 2014, 2:10 AM CST for Houston County, Alabama; 19 counties in Florida; 38 counties in Georgia. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Dec 24, 2014, 2:10 AM CST (08:10 UTC)
Expired
Dec 24, 2014, 4:15 AM CST
In force
2 hr
Issued by
the Storm Prediction Center
All 58 counties

Houston County, AL, Bay County, FL, Calhoun County, FL, Dixie County, FL, Franklin County, FL, Gadsden County, FL, Gulf County, FL, Hamilton County, FL, Holmes County, FL, Jackson County, FL, Jefferson County, FL, Lafayette County, FL, Leon County, FL, Liberty County, FL, Madison County, FL, Suwannee County, FL, Taylor County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL, Atkinson County, GA, Bacon County, GA, Baker County, GA, Ben Hill County, GA, Berrien County, GA, Brooks County, GA, Calhoun County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Crisp County, GA, Decatur County, GA, Dodge County, GA, Dooly County, GA, Dougherty County, GA, Early County, GA, Echols County, GA, Grady County, GA, Irwin County, GA, Jeff Davis County, GA, Lanier County, GA, Lee County, GA, Lowndes County, GA, Miller County, GA, Mitchell County, GA, Montgomery County, GA, Pulaski County, GA, Seminole County, GA, Telfair County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Treutlen County, GA, Turner County, GA, Wheeler County, GA, Wilcox County, GA, Worth County, GA

The radar

The Tallahassee radar (KTLH), 33 km from the middle of the area, began a volume at 08:10 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, 8.2 hours before the alert went out and 34 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 2014-12-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLLFCEL10008507005003002001001 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 2014-12-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 397 square meters per square second.19395878Sfc1 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
509 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
397 m²/s²
0-3 km storm-relative helicity
547 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

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
Dec 23, 7:03 PM CSTMesoscale DiscussionSPCBarbour, Bullock, Butler, Chambers, Clay, Coffee and 19 more87 min
Dec 23, 10:22 PM CSTMesoscale DiscussionSPCHouston53 min
Dec 23, 10:55 PM CSTTornado WatchSPCBay, Calhoun, Dixie, Franklin, Gadsden, Gulf and 13 more9 hr
Dec 24, 4:02 AM CSTMesoscale DiscussionSPCBaker, Bay, Calhoun, Columbia, Dixie, Franklin and 16 more118 min
Dec 24, 5:32 AM CSTTornado WatchSPCBaker, Bay, Calhoun, Columbia, Dixie, Franklin and 13 more7 hr
Dec 24, 7:50 AM CSTMesoscale DiscussionSPCBaker, Bradford, Columbia, Dixie, Franklin, Gadsden and 13 more115 min

Nearby

Mesoscale Discussions in Georgia, 2014Mesoscale Discussions in Florida, 2014Mesoscale Discussions in Alabama, 2014Every mesoscale discussion in 2014

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.