Alert archive / Georgia / Mesoscale Discussions in 2017

Mesoscale Discussion 11

January 2, 201723 counties in Alabama; 7 counties in Florida; 41 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Jan 2, 2017, 12:59 PM CST for 23 counties in Alabama; 7 counties in Florida; 41 counties in Georgia. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jan 2, 2017, 12:59 PM CST (18:59 UTC)
Expired
Jan 2, 2017, 3:00 PM CST
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 71 counties

Autauga County, AL, Barbour County, AL, Bullock County, AL, Butler County, AL, Chambers County, AL, Chilton County, AL, Coffee County, AL, Coosa County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Dallas County, AL, Elmore County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Montgomery County, AL, Pike County, AL, Russell County, AL, Tallapoosa County, AL, Bay County, FL, Calhoun County, FL, Holmes County, FL, Jackson County, FL, Okaloosa County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Bibb County, GA, Bleckley County, GA, Calhoun County, GA, Chattahoochee County, GA, Clay County, GA, Crawford County, GA, Crisp County, GA, Dodge County, GA, Dooly County, GA, Dougherty County, GA, Early County, GA, Harris County, GA, Houston County, GA, Johnson County, GA, Laurens County, GA, Lee County, GA, Macon County, GA, Marion County, GA, Miller County, GA, Muscogee County, GA, Peach County, GA, Pulaski County, GA, Quitman County, GA, Randolph County, GA, Schley County, GA, Seminole County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taylor County, GA, Terrell County, GA, Treutlen County, GA, Troup County, GA, Turner County, GA, Twiggs County, GA, Upson County, GA, Webster County, GA, Wilcox County, GA, Wilkinson County, GA, Worth County, GA

The radar

The Ft Rucker radar (KEOX), 47 km from the middle of the area, began a volume at 19:00 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, 7.0 hours before the alert went out and 189 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 2017-01-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2017-01-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 103 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
845 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
103 m²/s²
0-3 km storm-relative helicity
222 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
Jan 2, 7:08 AM CSTMesoscale DiscussionSPCBibb, Choctaw, Greene, Hale, Marengo, Perry and 3 more97 min
Jan 2, 10:17 AM CSTMesoscale DiscussionSPCBaldwin, Clarke, Mobile, Washington118 min
Jan 2, 11:22 AM CSTTornado WatchSPCBaldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 8 more9 hr
Jan 2, 2:03 PM CSTMesoscale DiscussionSPCBaldwin, Butler, Choctaw, Clarke, Coffee, Conecuh and 10 more117 min
Jan 2, 3:46 PM CSTTornado WatchSPCBarbour, Bullock, Coffee, Dale, Geneva, Henry and 3 more8 hr
Jan 2, 5:36 PM CSTMesoscale DiscussionSPCBarbour, Bullock, Butler, Coffee, Covington, Crenshaw and 10 more114 min

Nearby

Mesoscale Discussions in Georgia, 2017Mesoscale Discussions in Alabama, 2017Mesoscale Discussions in Florida, 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.