Alert archive / Georgia / Flood Watches in 2009

Flood Watch 6, NWS Atlanta, GA

May 6, 200932 counties in Georgia

NWS Atlanta, GA issued this flood watch at May 6, 2009, 4:21 AM EDT for 32 counties in Georgia. It took effect at May 6, 2009, 8:00 AM EDT. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued: May 6, 2009, 4:21 AM EDT (08:21 UTC)
In effect from: May 6, 2009, 8:00 AM EDT
Expired: May 6, 2009, 7:29 PM EDT
In force: 11 hr
Issued by: NWS Atlanta, GA
Flood severity: None

All 32 counties

Banks County, GA, Barrow County, GA, Bartow County, GA, Carroll County, GA, Catoosa County, GA, Chattooga County, GA, Cherokee County, GA, Cobb County, GA, Dade County, GA, Dawson County, GA, DeKalb County, GA, Douglas County, GA, Fannin County, GA, Floyd County, GA, Forsyth County, GA, Fulton County, GA, Gilmer County, GA, Gordon County, GA, Gwinnett County, GA, Hall County, GA, Haralson County, GA, Jackson County, GA, Lumpkin County, GA, Murray County, GA, Paulding County, GA, Pickens County, GA, Polk County, GA, Towns County, GA, Union County, GA, Walker County, GA, White County, GA, Whitfield County, GA

The radar

The Atlanta radar (KFFC), 108 km from the middle of the area, began a volume at 08:22 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 00:00Z, 8.4 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: 66 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 1561 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 50 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Atlanta, GA wrote its last area forecast discussion before this flood watch went out at May 6, 4:12 AM EDT, 9 minutes earlier.

Area forecast discussion, May 6, 4:12 AM EDT, 9 minutes before

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Hazardous weather outlook, May 5, 10:04 PM EDT, 6 hours 17 minutes before

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The office that day

Everything else NWS Atlanta, GA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 5, 8:24 PM EDT	Severe Thunderstorm Warning	FFC	Emanuel, Johnson, Laurens, Treutlen, Washington, Wilkinson	37 min
May 5, 8:32 PM EDT	Severe Thunderstorm Warning	FFC	Baldwin, Washington, Wilkinson	28 min
May 6, 10:20 AM EDT	River Flood Warning	FFC	Clarke, Greene, Oconee	12 hr
May 6, 10:37 AM EDT	River Flood Warning	FFC	Forsyth, Fulton	11 hr
May 6, 1:01 PM EDT	River Flood Warning	FFC	Dade	8 hr
May 6, 1:51 PM EDT	Areal Flood Warning	FFC	Emanuel, Jefferson	12 hr
May 6, 2:54 PM EDT	Severe Thunderstorm Warning	FFC	Troup	25 min
May 6, 3:05 PM EDT	Severe Thunderstorm Warning	FFC	Meriwether	35 min
May 6, 3:43 PM EDT	Severe Thunderstorm Warning	FFC	Harris, Muscogee	62 min
May 6, 4:32 PM EDT	Severe Thunderstorm Warning	FFC	Chattahoochee, Harris, Marion, Muscogee, Talbot	58 min
May 6, 4:43 PM EDT	Severe Thunderstorm Warning	FFC	Lamar, Monroe, Upson	36 min
May 6, 4:56 PM EDT	Severe Thunderstorm Warning	FFC	Marion, Talbot, Taylor	36 min
May 6, 5:28 PM EDT	Severe Thunderstorm Warning	FFC	Chattahoochee, Marion	32 min

Nearby

Flood Watches in Georgia, 2009 Every flood watch in 2009

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.