Alert archive / Georgia / Areal Flood Warnings in 2009

Areal Flood Warning 65, NWS Atlanta, GA

December 13, 2009Crisp County, Georgia

NWS Atlanta, GA issued this areal flood warning at Dec 13, 2009, 3:56 PM EST for Crisp County, Georgia. It was in force for 17 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 13, 2009, 3:56 PM EST (20:56 UTC)
Expired: Dec 14, 2009, 9:00 AM EST
In force: 17 hr
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Flood severity: None

County Crisp County, GA

The radar

The Robins AFB radar (KJGX), 92 km from the middle of the area, began a volume at 20:57 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, 8.9 hours before the alert went out and 175 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: 396 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 561 m²/s²
0-3 km storm-relative helicity: 548 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 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 13, 2:46 PM EST, 1 hour 10 minutes earlier.

Area forecast discussion, Dec 13, 2:46 PM EST, 1 hour 10 minutes before

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Hazardous weather outlook, Dec 13, 2:52 PM EST, 1 hour 4 minutes before

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In the hours before

Special weather statement, Dec 13, 10:44 AM EST, 5 hours 12 minutes before

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Local storm report, Dec 13, 11:50 AM EST, 4 hours 6 minutes before

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Local storm report, Dec 13, 12:24 PM EST, 3 hours 32 minutes before

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Local storm report, Dec 13, 1:46 PM EST, 2 hours 10 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 13, 6:58 AM EST	Severe Thunderstorm Warning	FFC	Chattooga, Walker	47 min
Dec 13, 7:00 AM EST	Severe Thunderstorm Warning	FFC	Chattooga, Walker	17 min
Dec 13, 8:16 AM EST	River Flood Warning	FFC	Johnson, Washington, Wilkinson	4 days
Dec 13, 9:58 AM EST	Flash Flood Warning	FFC	Crisp	6 hr
Dec 13, 3:37 PM EST	Dense Fog Advisory	FFC	Baldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 90 more	18 hr
Dec 13, 6:12 PM EST	Areal Flood Warning	FFC	Dooly	9 hr

Nearby

Areal Flood Warnings in Georgia, 2009 Every areal flood warning 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.