Alert archive / Georgia / Flood Watches in 2010

Flood Watch 6, NWS Atlanta, GA

March 12, 201014 counties in Georgia

NWS Atlanta, GA issued this flood watch at Mar 12, 2010, 4:12 AM EST for 14 counties in Georgia. It took effect at Mar 12, 2010, 10:00 AM EST. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued: Mar 12, 2010, 4:12 AM EST (09:12 UTC)
In effect from: Mar 12, 2010, 10:00 AM EST
Expired: Mar 12, 2010, 3:59 PM EST
In force: 6 hr
Issued by: NWS Atlanta, GA
Flood severity: None

Counties Catoosa County, GA, Dade County, GA, Dawson County, GA, Fannin County, GA, Gilmer County, GA, Gordon County, GA, Lumpkin County, GA, Murray County, GA, Pickens County, GA, Towns County, GA, Union County, GA, Walker County, GA, White County, GA, Whitfield County, GA

The radar

The Northeast Alabama radar (KHTX), 144 km from the middle of the area, began a volume at 09:12 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

Birmingham, AL (KBMX), launched 00:00Z, 9.2 hours before the alert went out and 269 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: 687 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1228 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 26 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.0

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 Mar 12, 3:36 AM EST, 36 minutes earlier.

Area forecast discussion, Mar 12, 3:36 AM EST, 36 minutes before

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Hazardous weather outlook, Mar 11, 3:06 PM EST, 13 hours 6 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
Mar 12, 1:13 AM EST	Dense Fog Advisory	FFC	Banks, Barrow, Bartow, Cherokee, Clarke, Clayton and 31 more	8 hr
Mar 12, 4:08 AM EST	Wind Advisory	FFC	Dawson, Fannin, Gilmer, Lumpkin, Pickens, Towns and 2 more	12 hr
Mar 12, 11:02 AM EST	Severe Thunderstorm Warning	FFC	Catoosa, Chattooga, Dade, Walker	58 min
Mar 12, 11:54 AM EST	Severe Thunderstorm Warning	FFC	Catoosa, Chattooga, Dade, Floyd, Gordon, Walker and 1 more	66 min
Mar 12, 2:45 PM EST	Severe Thunderstorm Warning	FFC	Bleckley, Dooly, Houston, Pulaski, Twiggs	45 min
Mar 12, 4:35 PM EST	Severe Thunderstorm Warning	FFC	Houston, Macon	40 min
Mar 12, 4:54 PM EST	Areal Flood Warning	FFC	Houston	111 min
Mar 12, 5:01 PM EST	Severe Thunderstorm Warning	FFC	Dooly, Pulaski	33 min
Mar 12, 5:13 PM EST	Severe Thunderstorm Warning	FFC	Bleckley, Houston, Pulaski, Twiggs	47 min
Mar 12, 5:18 PM EST	Tornado Warning	FFC	Bleckley, Houston, Pulaski, Twiggs	42 min
Mar 12, 5:43 PM EST	Tornado Warning	FFC	Bleckley, Laurens	37 min

Nearby

Flood Watches in Georgia, 2010 Every flood watch in 2010

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.