Alert archive / Georgia / Flash Flood Warnings in 2013

Flash Flood Warning 98, NWS Atlanta, GA

August 31, 2013Murray County, Georgia

NWS Atlanta, GA issued this flash flood warning at Aug 31, 2013, 9:58 PM EDT for Murray 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
Aug 31, 2013, 9:58 PM EDT (01:58 UTC)
Expired
Sep 1, 2013, 4:00 AM EDT
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

County Murray County, GA

The radar

The Northeast Alabama radar (KHTX), 123 km from the middle of the area, began a volume at 01:57 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 00:00Z, 2.0 hours before the alert went out and 163 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 2013-09-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2887 joules per kilogram.LCLEL10008507005003002001001 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 2013-09-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 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
2887 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
902 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
62 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.

443 
WGUS52 KFFC 010158
FFWFFC
GAC213-010800-
/O.NEW.KFFC.FF.W.0098.130901T0158Z-130901T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
958 PM EDT SAT AUG 31 2013

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

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

* UNTIL 400 AM EDT SUNDAY

* AT 953 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  2 TO 3 INCHES OF RAIN FROM A THUNDERSTORM OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CISCO...
  GREGORY AND TENNGA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN THE WARNED 
AREA.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

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. YOU CAN ALSO TWEET YOUR REPORT
USING HASHTAG GAWX.

&&

LAT...LON 3486 8462 3482 8459 3478 8464 3474 8464
      3463 8472 3467 8484 3479 8487 3480 8484
      3481 8486 3484 8485 3487 8482 3493 8484
      3499 8481 3499 8463

$$
1 follow-up statement
176 
WGUS72 KFFC 010533
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
133 AM EDT SUN SEP 1 2013

GAC213-010542-
/O.CAN.KFFC.FF.W.0098.000000T0000Z-130901T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MURRAY GA-
133 AM EDT SUN SEP 1 2013

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

THE HEAVY RAIN HAS ENDED ACROSS THE COUNTY...BUT SOME CREEKS AND 
STREAMS MAY STILL BE HIGH. CONTINUE TO EXERCISE CAUTION...ESPECIALLY 
SINCE AT NIGHT IT IS HARDER TO SEE IF ROADWAYS ARE FLOODED.

IF YOU SEE SIGNIFICANT FLOODING CALL THE NATIONAL WEATHER SERVICE
TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6. YOU CAN ALSO TWEET YOUR REPORT
USING HASHTAG GAWX.

LAT...LON 3486 8462 3482 8459 3478 8464 3474 8464
      3463 8472 3467 8484 3479 8487 3480 8484
      3481 8486 3484 8485 3487 8482 3493 8484
      3499 8481 3499 8463

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 31, 9:09 PM EDTSpecial Weather StatementFFCMurray51 min
Aug 31, 10:03 PM EDTSpecial Weather StatementFFCTowns57 min
Sep 1, 5:50 AM EDTSpecial Weather StatementFFCGilmer, Murray, Pickens40 min
Sep 1, 6:37 AM EDTSpecial Weather StatementFFCGilmer, Pickens38 min
Sep 1, 7:42 AM EDTFlash Flood WarningFFCGilmer6 hr
Sep 1, 12:20 PM EDTSpecial Weather StatementFFCGordon, Pickens40 min
Sep 1, 12:50 PM EDTSpecial Weather StatementFFCFulton, Gwinnett40 min
Sep 1, 12:59 PM EDTSpecial Weather StatementFFCClarke, Madison46 min
Sep 1, 1:06 PM EDTSpecial Weather StatementFFCBartow, Polk39 min
Sep 1, 1:33 PM EDTSpecial Weather StatementFFCDeKalb, Douglas, Fulton, Gwinnett, Walton42 min
Sep 1, 1:38 PM EDTSpecial Weather StatementFFCHaralson, Paulding, Polk52 min
Sep 1, 1:49 PM EDTSevere Thunderstorm WarningFFCCobb, Douglas, Paulding41 min
Sep 1, 1:54 PM EDTSpecial Weather StatementFFCClarke, Oconee, Oglethorpe36 min
Sep 1, 2:31 PM EDTSpecial Weather StatementFFCCarroll, Douglas, Haralson29 min
Sep 1, 2:34 PM EDTSpecial Weather StatementFFCCobb, DeKalb, Fulton41 min
Sep 1, 2:52 PM EDTSpecial Weather StatementFFCClayton, Henry, Newton, Rockdale23 min
Sep 1, 3:02 PM EDTSpecial Weather StatementFFCCarroll, Douglas43 min
Sep 1, 3:32 PM EDTSpecial Weather StatementFFCCatoosa43 min
Sep 1, 3:40 PM EDTSpecial Weather StatementFFCButts50 min
Sep 1, 3:46 PM EDTSpecial Weather StatementFFCCarroll, Heard44 min
Sep 1, 4:09 PM EDTSpecial Weather StatementFFCFayette, Meriwether51 min
Sep 1, 4:15 PM EDTSpecial Weather StatementFFCCatoosa, Murray, Whitfield45 min
Sep 1, 4:31 PM EDTSevere Thunderstorm WarningFFCCatoosa, Murray, Whitfield44 min
Sep 1, 5:07 PM EDTSpecial Weather StatementFFCLamar, Monroe23 min
Sep 1, 5:13 PM EDTSpecial Weather StatementFFCUpson47 min
Sep 1, 5:16 PM EDTSpecial Weather StatementFFCGordon44 min
Sep 1, 5:50 PM EDTSpecial Weather StatementFFCBibb40 min
Sep 1, 6:12 PM EDTSpecial Weather StatementFFCMuscogee48 min
Sep 1, 6:31 PM EDTSpecial Weather StatementFFCCrawford, Macon, Taylor44 min
Sep 1, 7:02 PM EDTSpecial Weather StatementFFCGlascock28 min
Sep 1, 7:28 PM EDTSpecial Weather StatementFFCGlascock, Warren47 min

Nearby

Flash Flood Warnings in Georgia, 2013Every flash flood warning in 2013

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.