Alert archive / Georgia / Mesoscale Discussions in 2017

Mesoscale Discussion 251

March 1, 201722 counties in Alabama; 37 counties in Georgia; Clarke County, Jones County, Wayne County, Mississippi

The Storm Prediction Center issued this mesoscale discussion at Mar 1, 2017, 5:54 PM CST for 22 counties in Alabama; 37 counties in Georgia; Clarke County, Jones County, Wayne County, Mississippi. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Mar 1, 2017, 5:54 PM CST (23:54 UTC)
Expired
Mar 1, 2017, 8:00 PM CST
In force
2 hr
Issued by
the Storm Prediction Center
All 62 counties

Autauga County, AL, Bibb County, AL, Chambers County, AL, Chilton County, AL, Choctaw County, AL, Clarke County, AL, Clay County, AL, Cleburne County, AL, Coosa County, AL, Dallas County, AL, Elmore County, AL, Hale County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Marengo County, AL, Montgomery County, AL, Perry County, AL, Randolph County, AL, Talladega County, AL, Tallapoosa County, AL, Wilcox County, AL, Banks County, GA, Barrow County, GA, Butts County, GA, Carroll County, GA, Clarke County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, DeKalb County, GA, Douglas County, GA, Fayette County, GA, Forsyth County, GA, Fulton County, GA, Greene County, GA, Gwinnett County, GA, Hall County, GA, Haralson County, GA, Harris County, GA, Heard County, GA, Henry County, GA, Jackson County, GA, Jasper County, GA, Lamar County, GA, Madison County, GA, Meriwether County, GA, Morgan County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Paulding County, GA, Pike County, GA, Putnam County, GA, Rockdale County, GA, Spalding County, GA, Troup County, GA, Upson County, GA, Walton County, GA, Clarke County, MS, Jones County, MS, Wayne County, MS

The radar

The Maxwell AFB radar (KMXX), 73 km from the middle of the area, began a volume at 23:58 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 11.9 hours before the alert went out and 89 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 2017-03-01Temperature 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, Peachtre/Fal Fld, GA at 12:00Z on 2017-03-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 173 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
680 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
173 m²/s²
0-3 km storm-relative helicity
306 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
Mar 1, 4:19 AM CSTMesoscale DiscussionSPCLauderdale56 min
Mar 1, 5:28 AM CSTMesoscale DiscussionSPCLauderdale2 hr
Mar 1, 10:08 AM CSTMesoscale DiscussionSPCBlount, Calhoun, Cherokee, Colbert, Cullman, DeKalb and 19 more2 hr
Mar 1, 11:48 AM CSTTornado WatchSPCBlount, Calhoun, Cherokee, Colbert, Cullman, DeKalb and 20 more6 hr
Mar 1, 2:11 PM CSTMesoscale DiscussionSPCBlount, Calhoun, Cherokee, Cullman, DeKalb, Etowah and 7 more2 hr
Mar 1, 2:43 PM CSTMesoscale DiscussionSPCAutauga, Chambers, Chilton, Clay, Coosa, Elmore and 3 more3 hr
Mar 1, 3:43 PM CSTSevere Thunderstorm WatchSPCAutauga, Bibb, Chambers, Chilton, Clay, Cleburne and 10 more4 hr
Mar 1, 1:07 PM CSTMesoscale DiscussionSPCRabun113 min
Mar 1, 2:02 PM CSTSevere Thunderstorm WatchSPCElbert, Franklin, Habersham, Hart, Rabun, Stephens7 hr
Mar 1, 2:09 AM CSTMesoscale DiscussionSPCDeSoto, Tunica2 hr
Mar 1, 1:32 PM CSTMesoscale DiscussionSPCAdams, Amite, Clarke, Copiah, Covington, Franklin and 14 more2 hr

Nearby

Mesoscale Discussions in Georgia, 2017Mesoscale Discussions in Alabama, 2017Mesoscale Discussions in Mississippi, 2017Every mesoscale discussion in 2017

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.