Alert archive / Georgia / Mesoscale Discussions in 2007

Mesoscale Discussion 2276

December 30, 2007Nassau County, Florida; 19 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Dec 30, 2007, 4:07 PM EST for Nassau County, Florida; 19 counties in Georgia. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued
Dec 30, 2007, 4:07 PM EST (21:07 UTC)
Expired
Dec 30, 2007, 5:00 PM EST
In force
53 min
Issued by
the Storm Prediction Center

Counties Nassau County, FL, Atkinson County, GA, Bacon County, GA, Brantley County, GA, Brooks County, GA, Bryan County, GA, Camden County, GA, Charlton County, GA, Clinch County, GA, Echols County, GA, Glynn County, GA, Lanier County, GA, Liberty County, GA, Long County, GA, Lowndes County, GA, McIntosh County, GA, Pierce County, GA, Thomas County, GA, Ware County, GA, Wayne County, GA

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 9.1 hours before the alert went out and 104 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, Jacksonville, FL at 12:00Z on 2007-12-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 20 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, Jacksonville, FL at 12:00Z on 2007-12-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 135 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
20 J/kg
Mixed-layer CIN
-142 J/kg
Mixed-layer LCL
722 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
135 m²/s²
0-3 km storm-relative helicity
136 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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 30, 2:34 AM ESTMesoscale DiscussionSPCEscambia, Okaloosa, Santa Rosa86 min
Dec 30, 8:25 AM ESTMesoscale DiscussionSPCBay, Calhoun, Gadsden, Gulf, Holmes, Jackson and 4 more95 min
Dec 30, 1:15 PM ESTMesoscale DiscussionSPCJefferson, Leon, Madison90 min

Nearby

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