Alert archive / Georgia / Mesoscale Discussions in 2014

Mesoscale Discussion 24

January 11, 20149 counties in Florida; 14 counties in Georgia; 7 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Jan 11, 2014, 3:35 PM EST for 9 counties in Florida; 14 counties in Georgia; 7 counties in South Carolina. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued
Jan 11, 2014, 3:35 PM EST (20:35 UTC)
Expired
Jan 11, 2014, 4:30 PM EST
In force
55 min
Issued by
the Storm Prediction Center
All 30 counties

Alachua County, FL, Baker County, FL, Bradford County, FL, Clay County, FL, Columbia County, FL, Duval County, FL, Gilchrist County, FL, Nassau County, FL, Union County, FL, Brantley County, GA, Bryan County, GA, Camden County, GA, Charlton County, GA, Chatham County, GA, Effingham County, GA, Evans County, GA, Glynn County, GA, Liberty County, GA, Long County, GA, McIntosh County, GA, Pierce County, GA, Ware County, GA, Wayne County, GA, Beaufort County, SC, Berkeley County, SC, Charleston County, SC, Colleton County, SC, Dorchester County, SC, Hampton County, SC, Jasper County, SC

The radar

The Charleston,SC radar (KCLX), 106 km from the middle of the area, began a volume at 20:37 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

Jacksonville, FL (KJAX), launched 12:00Z, 8.6 hours before the alert went out and 147 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 2014-01-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 941 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 2014-01-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 137 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
941 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
549 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
137 m²/s²
0-3 km storm-relative helicity
163 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.5

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.

IssuedProductOfficeCountiesLasted
Jan 11, 4:18 AM ESTMesoscale DiscussionSPCEscambia, Okaloosa, Santa Rosa117 min
Jan 11, 8:03 AM ESTMesoscale DiscussionSPCCalhoun, Gadsden, Holmes, Jackson, Washington27 min
Jan 11, 11:04 AM ESTSevere Thunderstorm WatchSPCBay, Calhoun, Dixie, Franklin, Gadsden, Gulf and 11 more6 hr
Jan 11, 1:53 PM ESTMesoscale DiscussionSPCBay, Calhoun, Franklin, Gadsden, Gulf, Holmes and 6 more97 min
Jan 11, 8:07 AM ESTTornado WatchSPCBaldwin, Barrow, Bibb, Bleckley, Butts, Chattahoochee and 63 more7 hr
Jan 11, 9:22 AM ESTMesoscale DiscussionSPCHart23 min
Jan 11, 9:30 AM ESTSevere Thunderstorm WatchSPCColumbia, Elbert, Lincoln, McDuffie6 hr
Jan 11, 11:50 AM ESTTornado WatchSPCBurke, Richmond6 hr
Jan 11, 12:17 PM ESTMesoscale DiscussionSPCAppling, Bacon, Baldwin, Ben Hill, Bleckley, Bryan and 32 more58 min
Jan 11, 1:51 PM ESTTornado WatchSPCAppling, Atkinson, Bacon, Brantley, Bryan, Bulloch and 20 more3 hr
Jan 11, 2:04 PM ESTMesoscale DiscussionSPCRichmond56 min
Jan 11, 11:12 AM ESTMesoscale DiscussionSPCCalhoun, Chesterfield, Darlington, Dillon, Kershaw, Lancaster and 6 more63 min
Jan 11, 2:13 PM ESTTornado WatchSPCGeorgetown, Horry, Williamsburg5 hr
Jan 11, 4:37 PM ESTMesoscale DiscussionSPCBerkeley, Charleston, Georgetown, Horry53 min

Nearby

Mesoscale Discussions in Georgia, 2014Mesoscale Discussions in Florida, 2014Mesoscale Discussions in South Carolina, 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.