Alert archive / Georgia / Mesoscale Discussions in 2016

Mesoscale Discussion 137

February 24, 201613 counties in Florida; 21 counties in Georgia; 5 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Feb 24, 2016, 6:48 AM EST for 13 counties in Florida; 21 counties in Georgia; 5 counties in South Carolina. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued
Feb 24, 2016, 6:48 AM EST (11:48 UTC)
Expired
Feb 24, 2016, 8:15 AM EST
In force
87 min
Issued by
the Storm Prediction Center
All 39 counties

Alachua County, FL, Baker County, FL, Bradford County, FL, Citrus County, FL, Clay County, FL, Columbia County, FL, Duval County, FL, Gilchrist County, FL, Hernando County, FL, Levy County, FL, Marion County, FL, Nassau County, FL, Union County, FL, Appling County, GA, Bacon County, GA, Brantley County, GA, Bryan County, GA, Bulloch County, GA, Camden County, GA, Candler County, GA, Charlton County, GA, Chatham County, GA, Clinch County, GA, Effingham County, GA, Evans County, GA, Glynn County, GA, Liberty County, GA, Long County, GA, McIntosh County, GA, Pierce County, GA, Screven County, GA, Tattnall County, GA, Ware County, GA, Wayne County, GA, Allendale County, SC, Beaufort County, SC, Colleton County, SC, Hampton County, SC, Jasper County, SC

The radar

The Jacksonville radar (KJAX), 60 km from the middle of the area, began a volume at 11:47 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 00:00Z, 11.8 hours before the alert went out and 58 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 00:00Z on 2016-02-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 652 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 00:00Z on 2016-02-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 76 square meters per square second.1939587897117Sfc1 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
652 J/kg
Mixed-layer CIN
-26 J/kg
Mixed-layer LCL
1024 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
76 m²/s²
0-3 km storm-relative helicity
131 m²/s²
Significant tornado parameter
0.3
Supercell composite
1.8

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 23, 7:51 PM ESTMesoscale DiscussionSPCEscambia54 min
Feb 23, 9:08 PM ESTTornado WatchSPCBay, Calhoun, Dixie, Escambia, Franklin, Gadsden and 14 more9 hr
Feb 23, 10:07 PM ESTMesoscale DiscussionSPCBay, Holmes, Jackson, Okaloosa, Walton, Washington53 min
Feb 24, 1:44 AM ESTMesoscale DiscussionSPCFranklin, Gadsden, Hamilton, Jefferson, Leon, Liberty and 2 more2 hr
Feb 24, 3:58 AM ESTTornado WatchSPCAlachua, Baker, Bradford, Citrus, Columbia, Gilchrist and 12 more6 hr
Feb 24, 8:36 AM ESTMesoscale DiscussionSPCCharlotte, Clay, DeSoto, Hardee, Hernando, Highlands and 11 more84 min
Feb 24, 11:42 AM ESTMesoscale DiscussionSPCBrevard, Charlotte, Collier, DeSoto, Glades, Hardee and 18 more63 min
Feb 24, 12:14 AM ESTTornado WatchSPCBibb, Bleckley, Chattahoochee, Crawford, Crisp, Dodge and 27 more6 hr
Feb 24, 8:14 AM ESTMesoscale DiscussionSPCBanks, Barrow, Dawson, Fannin, Forsyth, Franklin and 12 more2 hr
Feb 24, 10:46 AM ESTMesoscale DiscussionSPCCherokee, Chester, Chesterfield, Darlington, Fairfield, Kershaw and 9 more119 min
Feb 24, 11:16 AM ESTTornado WatchSPCAiken, Bamberg, Barnwell, Calhoun, Cherokee, Chester and 21 more8 hr
Feb 24, 2:55 PM ESTMesoscale DiscussionSPCCalhoun, Chesterfield, Clarendon, Darlington, Dillon, Florence and 6 more95 min
Feb 24, 4:46 PM ESTMesoscale DiscussionSPCDillon, Marlboro89 min
Feb 24, 6:50 PM ESTTornado WatchSPCHorry4 hr

Nearby

Mesoscale Discussions in Georgia, 2016Mesoscale Discussions in Florida, 2016Mesoscale Discussions in South Carolina, 2016Every mesoscale discussion in 2016

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.