Alert archive / Georgia / Mesoscale Discussions in 2013

Mesoscale Discussion 98

January 30, 20134 states

The Storm Prediction Center issued this mesoscale discussion at Jan 30, 2013, 11:50 AM CST for 4 states. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued
Jan 30, 2013, 11:50 AM CST (17:50 UTC)
Expired
Jan 30, 2013, 1:15 PM CST
In force
85 min
Issued by
the Storm Prediction Center
All 117 counties

Bullock County, AL, Chambers County, AL, Elmore County, AL, Lee County, AL, Macon County, AL, Montgomery County, AL, Randolph County, AL, Russell County, AL, Tallapoosa County, AL, Baldwin County, GA, Banks County, GA, Barrow County, GA, Bartow County, GA, Bibb County, GA, Butts County, GA, Carroll County, GA, Chattahoochee County, GA, Cherokee County, GA, Clarke County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, Crawford County, GA, Dawson County, GA, DeKalb County, GA, Douglas County, GA, Elbert County, GA, Fayette County, GA, Forsyth County, GA, Franklin County, GA, Fulton County, GA, Greene County, GA, Gwinnett County, GA, Habersham County, GA, Hall County, GA, Hancock County, GA, Haralson County, GA, Harris County, GA, Hart County, GA, Heard County, GA, Henry County, GA, Jackson County, GA, Jasper County, GA, Jones County, GA, Lamar County, GA, Lincoln County, GA, Lumpkin County, GA, Madison County, GA, Marion County, GA, Meriwether County, GA, Monroe County, GA, Morgan County, GA, Muscogee County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Paulding County, GA, Peach County, GA, Pickens County, GA, Pike County, GA, Putnam County, GA, Rabun County, GA, Rockdale County, GA, Schley County, GA, Spalding County, GA, Stephens County, GA, Stewart County, GA, Talbot County, GA, Taliaferro County, GA, Taylor County, GA, Towns County, GA, Troup County, GA, Union County, GA, Upson County, GA, Walton County, GA, Warren County, GA, White County, GA, Wilkes County, GA, Alexander County, NC, Avery County, NC, Buncombe County, NC, Burke County, NC, Caldwell County, NC, Catawba County, NC, Clay County, NC, Cleveland County, NC, Davie County, NC, Gaston County, NC, Haywood County, NC, Henderson County, NC, Iredell County, NC, Jackson County, NC, Lincoln County, NC, Macon County, NC, Madison County, NC, McDowell County, NC, Mecklenburg County, NC, Mitchell County, NC, Polk County, NC, Rutherford County, NC, Transylvania County, NC, Watauga County, NC, Wilkes County, NC, Yadkin County, NC, Yancey County, NC, Abbeville County, SC, Anderson County, SC, Cherokee County, SC, Greenville County, SC, Greenwood County, SC, Laurens County, SC, McCormick County, SC, Oconee County, SC, Pickens County, SC, Spartanburg County, SC, Union County, SC, York County, SC

The radar

The Atlanta radar (KFFC), 136 km from the middle of the area, began a volume at 17:50 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 5.8 hours before the alert went out and 131 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, Peachtre/Fal Fld, GA at 12:00Z on 2013-01-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 220 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, Peachtre/Fal Fld, GA at 12:00Z on 2013-01-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 343 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
220 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
487 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
343 m²/s²
0-3 km storm-relative helicity
420 m²/s²
Significant tornado parameter
0.4
Supercell composite
1.8

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 29, 9:49 PM CSTMesoscale DiscussionSPCColbert, Franklin, Lauderdale116 min
Jan 30, 1:31 AM CSTMesoscale DiscussionSPCBlount, Calhoun, Cherokee, Colbert, Cullman, DeKalb and 17 more29 min
Jan 30, 1:46 AM CSTTornado WatchSPCBlount, Colbert, Cullman, DeKalb, Fayette, Franklin and 16 more8 hr
Jan 30, 4:27 AM CSTMesoscale DiscussionSPCMobile, Washington93 min
Jan 30, 5:01 AM CSTMesoscale DiscussionSPCAutauga, Bibb, Bullock, Butler, Calhoun, Chambers and 26 more29 min
Jan 30, 5:15 AM CSTTornado WatchSPCAutauga, Baldwin, Barbour, Bibb, Bullock, Butler and 34 more7 hr
Jan 30, 7:43 AM CSTMesoscale DiscussionSPCAutauga, Barbour, Bibb, Blount, Bullock, Calhoun and 36 more62 min
Jan 30, 10:09 AM CSTMesoscale DiscussionSPCBarbour, Bullock, Chambers, Clay, Cleburne, Crenshaw and 9 more96 min
Jan 30, 12:19 PM CSTTornado WatchSPCBarbour, Bullock, Butler, Chambers, Coffee, Conecuh and 16 more9 hr
Jan 30, 4:51 AM CSTTornado WatchSPCBartow, Carroll, Catoosa, Chattooga, Dade, Floyd and 8 more7 hr
Jan 30, 6:38 AM CSTMesoscale DiscussionSPCBartow, Carroll, Catoosa, Chattooga, Dade, Floyd and 7 more97 min
Jan 30, 7:11 AM CSTTornado WatchSPCBaldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 81 more7 hr
Jan 30, 3:13 PM CSTMesoscale DiscussionSPCBaldwin, Bibb, Bleckley, Colquitt, Columbia, Crisp and 32 more2 hr
Jan 30, 4:31 PM CSTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Ben Hill, Berrien, Brooks and 34 more59 min
Jan 30, 4:45 PM CSTTornado WatchSPCAppling, Atkinson, Bacon, Baker, Baldwin, Ben Hill and 71 more6 hr
Jan 30, 2:21 PM CSTMesoscale DiscussionSPCAlleghany, Rockingham, Stokes, Surry, Wilkes, Yadkin84 min
Jan 30, 2:42 PM CSTSevere Thunderstorm WatchSPCAlleghany, Ashe, Caswell, Rockingham, Stokes, Surry and 3 more5 hr
Jan 30, 3:06 PM CSTMesoscale DiscussionSPCAlamance, Chatham, Davidson, Durham, Franklin, Granville and 6 more114 min

Nearby

Mesoscale Discussions in Georgia, 2013Mesoscale Discussions in North Carolina, 2013Mesoscale Discussions in South Carolina, 2013Every mesoscale discussion in 2013

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.