Alert archive / Georgia / Flash Flood Warnings in 2011

Flash Flood Warning 1, NWS Atlanta, GA

January 1, 2011Chattooga County, Georgia

NWS Atlanta, GA issued this flash flood warning at Jan 1, 2011, 9:19 AM EST for Chattooga County, Georgia. It was in force for 4 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
Jan 1, 2011, 9:19 AM EST (14:19 UTC)
Expired
Jan 1, 2011, 1:15 PM EST
In force
4 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

County Chattooga County, GA

The radar

The Northeast Alabama radar (KHTX), 87 km from the middle of the area, began a volume at 14:19 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, 2.3 hours before the alert went out and 143 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 12:00Z on 2011-01-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 12:00Z on 2011-01-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 391 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
610 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
391 m²/s²
0-3 km storm-relative helicity
377 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

978 
WGUS52 KFFC 011419
FFWFFC
GAC055-012015-
/O.NEW.KFFC.FF.W.0001.110101T1419Z-110101T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
919 AM EST SAT JAN 1 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CHATTOOGA COUNTY IN NORTHWEST GEORGIA

* UNTIL 315 PM EST SATURDAY

* AT 910 AM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  PROGRESSIVE SHOWERS AND THUNDERSTORMS HAD DROPPED OVER 2 INCHES OF
  RAIN IN THREE HOURS OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  CHATTOGAVILLE...LYERLY...TIDINGS AND BERRYTON.  THE HEAVIEST RAIN
  HAS FALLEN IN SOUTHERN CHATTOOGA COUNTY...ALONG THE CHATTOOGA
  RIVER BASIN.  SMALL CREEKS AND STREAMS THAT FEED INTO THE
  CHATTOOGA RIVER AND CLARKS CREEK ARE MOST LIKELY TO SHOW THE
  EFFECTS OF THE HEAVY RAIN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY...THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

IF YOU SEE SIGNIFICANT FLOODING CALL THE NATIONAL WEATHER SERVICE
TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.

&&

LAT...LON 3459 8521 3458 8510 3443 8519 3439 8526
      3436 8534 3429 8538 3429 8546 3456 8552
      3458 8552

$$
1 follow-up statement
401 
WGUS72 KFFC 011815
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
115 PM EST SAT JAN 1 2011

GAC055-011822-
/O.CAN.KFFC.FF.W.0001.000000T0000Z-110101T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHATTOOGA GA-
115 PM EST SAT JAN 1 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CHATTOOGA COUNTY...

HEAVY SHOWERS HAVE MOVED EAST OF THE COUNTY WITH ONLY SPOTTY LIGHT 
SHOWERS LINGERING. COUNTY OFFICIALS HAVE INDICATED THAT NO MAJOR 
FLOOD PROBLEMS ARE OCCURRING AT THIS TIME. 

IF YOU SEE SIGNIFICANT FLOODING CALL THE NATIONAL WEATHER SERVICE
TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.

LAT...LON 3459 8521 3458 8510 3443 8519 3439 8526
      3436 8534 3429 8538 3429 8546 3456 8552
      3458 8552

$$

Nearby

Flash Flood Warnings in Georgia, 2011Every flash flood warning in 2011

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.