Alert archive / Georgia / Flash Flood Warnings in 2017

Flash Flood Warning 6, NWS Atlanta, GA

March 21, 2017Lumpkin County, Union County, White County, Georgia

NWS Atlanta, GA issued this flash flood warning at Mar 21, 2017, 6:20 PM EDT for Lumpkin County, Union County, White County, Georgia. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Mar 21, 2017, 6:20 PM EDT (22:20 UTC)
Expired: Mar 22, 2017, 12:15 AM EDT
In force: 6 hr
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Flood severity: None

Counties Lumpkin County, GA, Union County, GA, White County, GA

The radar

The Greer radar (KGSP), 138 km from the middle of the area, began a volume at 22:23 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, 10.3 hours before the alert went out and 161 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: 1219 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 125 m²/s²
0-3 km storm-relative helicity: 152 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

507 
WGUS52 KFFC 212220
FFWFFC
GAC187-291-311-220415-
/O.NEW.KFFC.FF.W.0006.170321T2220Z-170322T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
620 PM EDT TUE MAR 21 2017

The National Weather Service in Peachtree City has issued a

* Flash Flood Warning for...
  Northeastern Lumpkin County in north central Georgia...
  White County in northeastern Georgia...
  Central Union County in north central Georgia...

* Until 1215 AM EDT

* At 620 PM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Flash flooding is expected to
  begin shortly.

* Some locations that will experience flooding include...
  Cleveland, Helen, Unicoi State Park, Suches, Whitley Gap Shelter,
  Robertstown, Woods Hole Shelter, Low Gap Shelter, Camp Coleman
  Lake, Owltown, Vogel State Park, Anna Ruby Falls, Leaf, Smithgall
  Woods Conservation Are, Turners Corner, Blood Mountain Shelter,
  Sautee and Qualatchee Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you see significant flooding call the National Weather Service
toll free at 1 8 6 6 7 6 3 4 4 6 6 or tweet us your report at
NWSATLANTA.

&&

LAT...LON 3476 8363 3473 8362 3472 8364 3469 8364
      3465 8366 3462 8364 3460 8364 3456 8363
      3455 8362 3456 8365 3457 8372 3454 8374
      3472 8408 3486 8404

$$

1 follow-up statement

512 
WGUS72 KFFC 220257
FFSFFC

Flash Flood Statement
National Weather Service Peachtree City GA
1057 PM EDT TUE MAR 21 2017

GAC187-291-311-220306-
/O.CAN.KFFC.FF.W.0006.000000T0000Z-170322T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lumpkin GA-White GA-Union GA-
1057 PM EDT TUE MAR 21 2017

...THE FLASH FLOOD WARNING FOR NORTHEASTERN LUMPKIN...WHITE AND
CENTRAL UNION COUNTIES IS CANCELLED...

The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.

LAT...LON 3476 8363 3473 8362 3472 8364 3469 8364
      3465 8366 3462 8364 3460 8364 3456 8363
      3455 8362 3456 8365 3457 8372 3454 8374
      3472 8408 3486 8404

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 21, 3:40 PM EDT	Special Weather Statement	FFC	Banks	50 min
Mar 21, 3:50 PM EDT	Severe Thunderstorm Warning	FFC	Banks, Hall, White	40 min
Mar 21, 4:08 PM EDT	Special Weather Statement	FFC	Lumpkin	52 min
Mar 21, 4:23 PM EDT	Special Weather Statement	FFC	Chattooga	37 min
Mar 21, 4:29 PM EDT	Severe Thunderstorm Warning	FFC	Hall, White	46 min
Mar 21, 4:36 PM EDT	Special Weather Statement	FFC	Whitfield	39 min
Mar 21, 4:57 PM EDT	Severe Thunderstorm Warning	FFC	Murray, Whitfield	33 min
Mar 21, 4:58 PM EDT	Special Weather Statement	FFC	Union	47 min
Mar 21, 5:04 PM EDT	Flash Flood Warning	FFC	Hall, White	6 hr
Mar 21, 5:09 PM EDT	Severe Thunderstorm Warning	FFC	Fannin, Lumpkin, Union	51 min
Mar 21, 5:13 PM EDT	Severe Thunderstorm Warning	FFC	Banks, Hall, White	47 min
Mar 21, 5:18 PM EDT	Severe Thunderstorm Warning	FFC	Dade, Walker	18 min
Mar 21, 5:24 PM EDT	Special Weather Statement	FFC	Murray	36 min
Mar 21, 5:41 PM EDT	Severe Thunderstorm Warning	FFC	Lumpkin, White	49 min
Mar 21, 5:44 PM EDT	Special Weather Statement	FFC	Dade	31 min
Mar 21, 5:52 PM EDT	Severe Thunderstorm Warning	FFC	Fannin, Lumpkin, Union	38 min
Mar 21, 5:59 PM EDT	Severe Thunderstorm Warning	FFC	Banks	46 min
Mar 21, 6:06 PM EDT	Flash Flood Warning	FFC	Dade, Walker	6 hr
Mar 21, 6:06 PM EDT	Severe Thunderstorm Warning	FFC	Fannin	24 min
Mar 21, 6:07 PM EDT	Severe Thunderstorm Warning	FFC	Dade, Walker	23 min
Mar 21, 6:27 PM EDT	Special Weather Statement	FFC	Jackson	33 min
Mar 21, 6:28 PM EDT	Special Weather Statement	FFC	Walker	32 min
Mar 21, 6:28 PM EDT	Severe Thunderstorm Warning	FFC	Lumpkin, Union	47 min
Mar 21, 6:31 PM EDT	Special Weather Statement	FFC	White	44 min
Mar 21, 6:33 PM EDT	Severe Thunderstorm Warning	FFC	Fannin	42 min
Mar 21, 6:38 PM EDT	Severe Thunderstorm Warning	FFC	Catoosa, Dade, Walker	37 min
Mar 21, 6:53 PM EDT	Severe Thunderstorm Warning	FFC	Clarke, Jackson, Madison	52 min
Mar 21, 6:56 PM EDT	Special Weather Statement	FFC	Banks	49 min
Mar 21, 7:08 PM EDT	Severe Thunderstorm Warning	FFC	Madison	37 min
Mar 21, 7:09 PM EDT	Special Weather Statement	FFC	Forsyth	51 min
Mar 21, 7:11 PM EDT	Severe Thunderstorm Warning	FFC	Catoosa, Chattooga, Dade, Floyd, Gordon, Walker and 1 more	49 min
Mar 21, 7:13 PM EDT	Special Weather Statement	FFC	Jackson	47 min
Mar 21, 7:16 PM EDT	Severe Thunderstorm Warning	FFC	Fannin, Union	44 min
Mar 21, 7:17 PM EDT	Special Weather Statement	FFC	Walton	43 min
Mar 21, 7:21 PM EDT	Severe Thunderstorm Warning	FFC	Clarke, Madison, Oglethorpe	24 min
Mar 21, 7:24 PM EDT	Severe Thunderstorm Warning	FFC	Barrow, Jackson, Oconee	36 min
Mar 21, 7:33 PM EDT	Severe Thunderstorm Warning	FFC	Barrow, Gwinnett, Walton	42 min
Mar 21, 7:35 PM EDT	Special Weather Statement	FFC	Banks	25 min
Mar 21, 7:37 PM EDT	Special Weather Statement	FFC	Gilmer, Murray	23 min
Mar 21, 7:41 PM EDT	Special Weather Statement	FFC	Dawson	34 min
Mar 21, 7:41 PM EDT	Severe Thunderstorm Warning	FFC	Gilmer, Murray	34 min
Mar 21, 7:45 PM EDT	Severe Thunderstorm Warning	FFC	Clarke, Jackson, Madison, Oconee, Oglethorpe	45 min
Mar 21, 7:48 PM EDT	Special Weather Statement	FFC	Lumpkin, White	27 min
Mar 21, 7:48 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Chattooga, Fannin, Floyd, Gilmer, Gordon and 3 more	42 min

Nearby

Flash Flood Warnings in Georgia, 2017 Every flash flood warning in 2017

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.