Alert archive / Georgia / Mesoscale Discussions in 2008

Mesoscale Discussion 2133

August 22, 20084 counties in Florida; 60 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Aug 22, 2008, 4:13 PM EDT for 4 counties in Florida; 60 counties in Georgia. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: Aug 22, 2008, 4:13 PM EDT (20:13 UTC)
Expired: Aug 22, 2008, 5:45 PM EDT
In force: 92 min
Issued by: the Storm Prediction Center

All 64 counties

Duval County, FL, Hamilton County, FL, Madison County, FL, Nassau County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Baker County, GA, Ben Hill County, GA, Berrien County, GA, Brantley County, GA, Brooks County, GA, Bryan County, GA, Bulloch County, GA, Calhoun County, GA, Camden County, GA, Candler County, GA, Charlton County, GA, Chatham County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Crisp County, GA, Decatur County, GA, Dodge County, GA, Dooly County, GA, Dougherty County, GA, Echols County, GA, Effingham County, GA, Evans County, GA, Glynn County, GA, Grady County, GA, Irwin County, GA, Jeff Davis County, GA, Lanier County, GA, Laurens County, GA, Lee County, GA, Liberty County, GA, Long County, GA, Lowndes County, GA, McIntosh County, GA, Miller County, GA, Mitchell County, GA, Montgomery County, GA, Pierce County, GA, Pulaski County, GA, Randolph County, GA, Schley County, GA, Sumter County, GA, Tattnall County, GA, Telfair County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Toombs County, GA, Treutlen County, GA, Turner County, GA, Ware County, GA, Wayne County, GA, Webster County, GA, Wheeler County, GA, Wilcox County, GA, Worth County, GA

The radar

The Jacksonville radar (KJAX), 77 km from the middle of the area, began a volume at 20:13 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, 8.2 hours before the alert went out and 76 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: 921 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 512 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 134 m²/s²
0-3 km storm-relative helicity: 126 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.2

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
Aug 22, 12:42 AM EDT	Mesoscale Discussion	SPC	Duval, Nassau	2 hr
Aug 22, 9:59 AM EDT	Mesoscale Discussion	SPC	Duval, Hamilton, Madison, Nassau	2 hr
Aug 22, 10:48 AM EDT	Tornado Watch	SPC	Baker, Clay, Duval, Nassau, Saint Johns	11 hr

Nearby

Mesoscale Discussions in Georgia, 2008 Mesoscale Discussions in Florida, 2008 Every mesoscale discussion in 2008

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.