Alert archive / Georgia / Flash Flood Warnings in 2018

Flash Flood Warning 14, NWS Atlanta, GA

May 29, 2018Towns County, White County, Georgia

NWS Atlanta, GA issued this flash flood warning at May 29, 2018, 11:56 PM EDT for Towns County, White County, Georgia. It was in force for 13 hr. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
May 29, 2018, 11:56 PM EDT (03:56 UTC)
Expired
May 30, 2018, 1:00 PM EDT
In force
13 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

Counties Towns County, GA, White County, GA

The radar

The Greer radar (KGSP), 135 km from the middle of the area, began a volume at 03:58 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.

What was reported inside it

TimeReportWhereRemark
May 30, 3:00 AM EDTFLASH FLOOD1 E Macedonia, GATHE RIVER BEND CAMPGROUND WAS EVACUATED DUE TO HIGH WATER. TWO COWS AND A CAT WERE KILLED.
May 30, 3:00 AM EDTFLASH FLOOD1 Sse Macedonia, GATHE ENCHANTED VALLEY CAMPGROUND AND THE RIVER BEND CAMPGROUND WERE BOTH FLOODED. CAMPERS WERE EVACUATED.
May 30, 3:00 AM EDTFLASH FLOOD1 Sse Macedonia, GATHE ENCHANTED VALLEY CAMPGROUND WAS EVACUATED DUE TO HIGH WATER.
May 30, 3:00 AM EDTFLASH FLOOD2 Se Blue Mountain Shel, GAA MUDSLIDE OCCURRED AT UNICOI GAP.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 3.9 hours before the alert went out and 176 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-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 00:00Z on 2018-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 235 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 00:00Z on 2018-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 73 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
235 J/kg
Mixed-layer CIN
-43 J/kg
Mixed-layer LCL
867 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
73 m²/s²
0-3 km storm-relative helicity
84 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.4

Open this sounding in Storm Lab

The text

As transmitted.

056 
WGUS52 KFFC 300356
FFWFFC
GAC281-311-301000-
/O.NEW.KFFC.FF.W.0014.180530T0356Z-180530T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
1156 PM EDT TUE MAY 29 2018

The National Weather Service in Peachtree City has issued a

* Flash Flood Warning for...
  Towns County in northeastern Georgia...
  White County in northeastern Georgia...

* Until 600 AM EDT Wednesday.

* At 1155 PM EDT, Doppler radar indicated heavy rain across the 
  warned area. Over two inches of rain have already fallen. Flash 
  flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Cleveland, Hiawassee, Helen, Unicoi State Park, Robertstown, Blue
  Mountain Shelter, Mossy Creek, Titus, Mountain Scene, Anna Ruby
  Falls, Macedonia, Leaf, Smithgall Woods Conservation Are, Sautee
  and Qualatchee Lake.

Additional rainfall amounts of two inches are possible in the warned 
area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

Excessive runoff from heavy rainfall will cause flooding of small 
creeks and streams, country roads, woodlands, and other low lying 
spots.

&&

LAT...LON 3499 8357 3494 8360 3492 8360 3491 8363
      3488 8366 3482 8365 3480 8368 3476 8363
      3469 8364 3465 8366 3454 8362 3451 8367
      3451 8381 3477 8383 3480 8378 3484 8379
      3486 8381 3490 8380 3498 8385

$$
3 follow-up statements
342 
WGUS72 KFFC 300700
FFSFFC

Flash Flood Statement
National Weather Service Peachtree City GA
300 AM EDT WED MAY 30 2018

GAC281-311-301000-
/O.CON.KFFC.FF.W.0014.000000T0000Z-180530T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Towns GA-White GA-
300 AM EDT WED MAY 30 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 600 AM EDT FOR
TOWNS AND WHITE COUNTIES...

At 255 AM EDT, doppler radar showed that although the widespread 
heavier rain has moved out of the area, scattered light to moderate 
showers continued. Even though the heavier rainfall has ended, many 
area creeks, streams and rivers continue to run at or over bankfull 
levels and should continue to do so for the next several hours. 

Some locations that will experience flooding include...
Cleveland, Hiawassee, Helen, Unicoi State Park, Robertstown, Blue
Mountain Shelter, Mossy Creek, Titus, Mountain Scene, Anna Ruby
Falls, Macedonia, Leaf, Smithgall Woods Conservation Are, Sautee and
Qualatchee Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the 
dangers of flooding. Roads are likely to have water ponding on or 
running over them, do not drive into areas where water covers the 
roadway. 

&&

LAT...LON 3499 8357 3494 8360 3492 8360 3491 8363
      3488 8366 3482 8365 3480 8368 3476 8363
      3469 8364 3465 8366 3454 8362 3451 8367
      3451 8381 3477 8383 3480 8378 3484 8379
      3486 8381 3490 8380 3498 8385

$$
960 
WGUS52 KFFC 300924
FFWFFC
GAC281-311-301400-
/O.EXT.KFFC.FF.W.0014.000000T0000Z-180530T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
524 AM EDT WED MAY 30 2018

The National Weather Service in Peachtree City has extended the

* Flash Flood Warning for...
  Towns County in northeastern Georgia...
  White County in northeastern Georgia...

* Until 1000 AM EDT.

* At 522 AM EDT, doppler radar estimates and automated rain gauges 
  indicated 3 to 6 inches of rain have fallen across the warned area 
  in the past 24 hours, with locally higher amounts as high as 8 
  inches. Flash flooding is already occurring.

* Some locations that will experience flooding include...
  Cleveland, Hiawassee, Helen, Unicoi State Park, Robertstown, Blue
  Mountain Shelter, Mossy Creek, Titus, Mountain Scene, Anna Ruby
  Falls, Macedonia, Leaf, Smithgall Woods Conservation Are, Sautee
  and Qualatchee Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

Excessive runoff from heavy rainfall will cause flooding of small 
creeks and streams, country roads, farmland, woodlands, and other 
low lying spots.

&&

LAT...LON 3499 8357 3494 8360 3492 8360 3491 8363
      3488 8366 3482 8365 3480 8368 3476 8363
      3469 8364 3465 8366 3454 8362 3451 8367
      3451 8381 3477 8383 3480 8378 3484 8379
      3486 8381 3490 8380 3498 8385

$$
491 
WGUS52 KFFC 301354
FFWFFC
GAC281-311-301700-
/O.EXT.KFFC.FF.W.0014.000000T0000Z-180530T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
954 AM EDT WED MAY 30 2018

The National Weather Service in Peachtree City has extended the

* Flash Flood Warning for...
  Towns County in northeastern Georgia...
  White County in northeastern Georgia...

* Until 100 PM EDT.

* At 951 AM EDT, gauge reports indicated heavy rain had fallen over 
  the warned area. Rainfall amounts of 5 to 7 inches with locally 
  higher amounts up to 8 inches had fallen in the last 24-hours. As 
  a result, flooding of creeks and rivers are still causing impacts 
  to the area. Additional rainfall amounts of 0.5 to 1.5 inches are 
  possible over the next 24 hours.

* Some locations that will experience flooding include...
  Cleveland, Hiawassee, Helen, Unicoi State Park, Robertstown, Blue
  Mountain Shelter, Mossy Creek, Titus, Mountain Scene, Anna Ruby
  Falls, Macedonia, Leaf, Smithgall Woods Conservation Are, Sautee
  and Qualatchee Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.

Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.

Please report flooding to your local law enforcement agency when you
can do so safely.

&&

LAT...LON 3499 8357 3494 8360 3492 8360 3491 8363
      3488 8366 3482 8365 3480 8368 3476 8363
      3469 8364 3465 8366 3454 8362 3451 8367
      3451 8381 3477 8383 3480 8378 3484 8379
      3486 8381 3490 8380 3498 8385

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 29, 8:30 PM EDTSpecial Weather StatementFFCChattooga, Dade, Walker45 min
May 29, 9:18 PM EDTSpecial Weather StatementFFCCatoosa, Chattooga, Dade, Floyd, Walker57 min
May 29, 9:33 PM EDTSpecial Weather StatementFFCHall42 min
May 29, 9:55 PM EDTRiver Flood WarningFFCGwinnett2 hr
May 29, 11:10 PM EDTSpecial Weather StatementFFCTowns, White50 min
May 30, 12:47 AM EDTSpecial Weather StatementFFCCarroll, Haralson, Paulding, Polk43 min
May 30, 1:07 AM EDTRiver Flood WarningFFCTowns7 hr
May 30, 1:32 AM EDTRiver Flood WarningFFCWhite4 hr
May 30, 2:23 AM EDTRiver Flood WarningFFCGwinnett, Walton4 hr
May 30, 2:33 AM EDTRiver Flood WarningFFCTowns24 hr
May 30, 9:31 AM EDTRiver Flood WarningFFCGwinnett11 hr
May 30, 1:01 PM EDTAreal Flood WarningFFCTowns, White6 hr
May 30, 4:40 PM EDTSpecial Weather StatementFFCLaurens35 min
May 30, 6:37 PM EDTSpecial Weather StatementFFCJohnson23 min
May 30, 6:39 PM EDTSpecial Weather StatementFFCMadison51 min
May 30, 6:56 PM EDTSpecial Weather StatementFFCGreene34 min

Nearby

Flash Flood Warnings in Georgia, 2018Every flash flood warning in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.