Alert archive / Georgia / Areal Flood Warnings in 2008

Areal Flood Warning 6, NWS Atlanta, GA

December 10, 2008Forsyth County, Georgia

NWS Atlanta, GA issued this areal flood warning at Dec 10, 2008, 5:58 PM EST for Forsyth County, Georgia. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Dec 10, 2008, 5:58 PM EST (22:58 UTC)
Expired: Dec 10, 2008, 10:18 PM EST
In force: 4 hr
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Flood severity: None

County Forsyth County, GA

The radar

The Atlanta radar (KFFC), 104 km from the middle of the area, began a volume at 22:59 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, 11.0 hours before the alert went out and 101 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: 4 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 552 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 388 m²/s²
0-3 km storm-relative helicity: 447 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood warning 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 areal flood warning went out at Dec 10, 5:01 PM EST, 57 minutes earlier.

Area forecast discussion, Dec 10, 5:01 PM EST, 57 minutes before

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Hazardous weather outlook, Dec 10, 1:00 PM EST, 4 hours 58 minutes before

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In the hours before

Special weather statement, Dec 10, 12:24 PM EST, 5 hours 34 minutes before

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Special weather statement, Dec 10, 1:55 PM EST, 4 hours 3 minutes before

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Local storm report, Dec 10, 3:52 PM EST, 2 hours 6 minutes before

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Special weather statement, Dec 10, 4:50 PM EST, 1 hour 8 minutes before

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Special weather statement, Dec 10, 5:05 PM EST, 53 minutes before

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Special weather statement, Dec 10, 5:32 PM EST, 26 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
Dec 10, 4:25 AM EST	Flash Flood Watch	FFC	Banks, Barrow, Bartow, Carroll, Catoosa, Chattooga and 30 more	6 hr
Dec 10, 5:22 AM EST	Tornado Warning	FFC	Chattooga	38 min
Dec 10, 5:53 AM EST	Flash Flood Warning	FFC	Chattooga, Fannin, Floyd, Gilmer, Gordon, Murray and 2 more	6 hr
Dec 10, 7:39 AM EST	Severe Thunderstorm Warning	FFC	Haralson, Paulding, Polk	33 min
Dec 10, 7:59 AM EST	Severe Thunderstorm Warning	FFC	Carroll	34 min
Dec 10, 8:15 AM EST	High Wind Warning	FFC	Fannin, Gilmer, Lumpkin, Towns, Union, White	3 hr
Dec 10, 9:46 AM EST	Severe Thunderstorm Warning	FFC	DeKalb, Henry, Rockdale	29 min
Dec 10, 10:11 AM EST	River Flood Warning	FFC	Dade	6 hr
Dec 10, 10:49 AM EST	Flood Watch	FFC	Baldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 90 more	28 hr
Dec 10, 2:30 PM EST	River Flood Warning	FFC	Forsyth, Fulton	31 hr
Dec 10, 3:03 PM EST	Tornado Warning	FFC	Wilkinson	27 min
Dec 10, 4:23 PM EST	Wind Advisory	FFC	Baldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 90 more	41 hr
Dec 10, 5:30 PM EST	Tornado Warning	FFC	Emanuel, Treutlen	28 min

Nearby

Areal Flood Warnings in Georgia, 2008 Every areal flood warning 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.