Alert archive / Georgia / Mesoscale Discussions in 2011

Mesoscale Discussion 219

March 9, 201120 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Mar 9, 2011, 4:38 PM EST for 20 counties in Georgia. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued: Mar 9, 2011, 4:38 PM EST (21:38 UTC)
Expired: Mar 9, 2011, 5:45 PM EST
In force: 67 min
Issued by: the Storm Prediction Center

Counties Brantley County, GA, Bryan County, GA, Bulloch County, GA, Camden County, GA, Charlton County, GA, Chatham County, GA, Clinch County, GA, Echols County, GA, Effingham County, GA, Evans County, GA, Glynn County, GA, Jenkins 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

The radar

The Jacksonville radar (KJAX), 109 km from the middle of the area, began a volume at 21:38 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, 9.6 hours before the alert went out and 107 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 783 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 142 m²/s²
0-3 km storm-relative helicity: 244 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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.

Issued	Product	Office	Counties	Lasted
Mar 9, 9:32 AM EST	Mesoscale Discussion	SPC	Baker, Ben Hill, Berrien, Brooks, Calhoun, Clay and 18 more	28 min
Mar 9, 9:39 AM EST	Tornado Watch	SPC	Baker, Ben Hill, Berrien, Brooks, Calhoun, Clay and 20 more	7 hr
Mar 9, 10:31 AM EST	Mesoscale Discussion	SPC	Baker, Brooks, Calhoun, Colquitt, Decatur, Dougherty and 6 more	59 min
Mar 9, 1:38 PM EST	Mesoscale Discussion	SPC	Baker, Ben Hill, Berrien, Brooks, Colquitt, Cook and 14 more	67 min
Mar 9, 2:04 PM EST	Mesoscale Discussion	SPC	Appling, Atkinson, Bacon, Ben Hill, Berrien, Bleckley and 34 more	26 min
Mar 9, 2:21 PM EST	Severe Thunderstorm Watch	SPC	Appling, Atkinson, Bacon, Brantley, Bryan, Bulloch and 29 more	6 hr
Mar 9, 4:14 PM EST	Mesoscale Discussion	SPC	Echols, Lowndes	31 min

Nearby

Mesoscale Discussions in Georgia, 2011 Every mesoscale discussion in 2011

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.