Alert archive / Georgia / Flash Flood Warnings in 2018

Flash Flood Warning 13, NWS Atlanta, GA

May 26, 2018Chattooga County, Floyd County, Georgia

NWS Atlanta, GA issued this flash flood warning at May 26, 2018, 12:03 AM EDT for Chattooga County, Floyd County, Georgia. It was in force for 6 hr. 2 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 26, 2018, 12:03 AM EDT (04:03 UTC)
Expired
May 26, 2018, 6:00 AM EDT
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

Counties Chattooga County, GA, Floyd County, GA

The radar

The Northeast Alabama radar (KHTX), 106 km from the middle of the area, began a volume at 04:05 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 26, 2:00 AM EDTFLASH FLOOD2 Wnw Rome, GAROAD CLOSURE DUE TO HIGH WATERS ON HWY 20 W/SHORTER AVE NEAR THE INTERSECTION WITH BURNETT FERRY RD. ROAD HAS SINCE REOPENED.
May 26, 2:00 AM EDTFLASH FLOOD4 Wnw Rome, GAROAD CLOSURE ON GARDEN LAKES PKWY DUE TO HIGH WATER. ROAD HAS SINCE REOPENED.

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, 4.1 hours before the alert went out and 125 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 2018-05-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1420 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 2018-05-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 square meters per square second.1939Sfc1 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
1420 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
646 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
20 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

710 
WGUS52 KFFC 260403
FFWFFC
GAC055-115-261000-
/O.NEW.KFFC.FF.W.0013.180526T0403Z-180526T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
1203 AM EDT SAT MAY 26 2018

The National Weather Service in Peachtree City has issued a

* Flash Flood Warning for...
  Floyd County in northwestern Georgia...
  Central Chattooga County in northwestern Georgia...

* Until 600 AM EDT.

* At 1202 AM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to two inches of rain have
  already fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Rome, Cave Spring, Shannon, Lyerly, Pinson, Lindale, Tidings,
  Armuchee, Lake Marvin, Coosa, Chattoogaville, Everett Springs,
  James H. Floyd State Park and Holland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

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

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

&&

LAT...LON 3459 8510 3459 8508 3454 8506 3454 8509
      3447 8509 3446 8511 3443 8509 3441 8511
      3440 8505 3410 8505 3409 8516 3410 8516
      3410 8526 3408 8526 3408 8533 3425 8544
      3438 8548

$$
1 follow-up statement
045 
WGUS72 KFFC 260958
FFSFFC

Flash Flood Statement
National Weather Service Peachtree City GA
558 AM EDT SAT MAY 26 2018

GAC055-115-261007-
/O.EXP.KFFC.FF.W.0013.000000T0000Z-180526T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Floyd GA-Chattooga GA-
558 AM EDT SAT MAY 26 2018

...THE FLASH FLOOD WARNING FOR FLOYD AND CENTRAL CHATTOOGA COUNTIES
WILL EXPIRE AT 600 AM EDT...

It has been several hours since the heavy rain has moved out of the 
area and rapidly rising water from Flash Flooding is no longer 
expected to pose a threat. However, creeks and streams are still 
likely to be running high, and some roads may still have some 
ponding of water in low areas, please continue to heed any remaining 
road closures.

LAT...LON 3459 8510 3459 8508 3454 8506 3454 8509
      3447 8509 3446 8511 3443 8509 3441 8511
      3440 8505 3410 8505 3409 8516 3410 8516
      3410 8526 3408 8526 3408 8533 3425 8544
      3438 8548

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 25, 8:00 PM EDTSpecial Weather StatementFFCJefferson45 min
May 25, 10:19 PM EDTSpecial Weather StatementFFCBartow26 min
May 25, 10:49 PM EDTSpecial Weather StatementFFCBartow26 min
May 25, 11:13 PM EDTSpecial Weather StatementFFCBartow, Chattooga, Floyd47 min
May 26, 7:36 AM EDTRiver Flood WarningFFCBibb, Houston, Jones, Monroe, Twiggs3 hr
May 26, 4:19 PM EDTSpecial Weather StatementFFCWashington41 min
May 26, 6:02 PM EDTSpecial Weather StatementFFCSumter28 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.