Alert archive / Georgia / Flash Flood Warnings in 2022

Flash Flood Warning 28, NWS Atlanta, GA

August 19, 2022Gilmer County, Murray County, Georgia

NWS Atlanta, GA issued this flash flood warning at Aug 19, 2022, 7:06 PM EDT for Gilmer County, Murray 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
Aug 19, 2022, 7:06 PM EDT (23:06 UTC)
Expired
Aug 19, 2022, 10:59 PM EDT
In force
4 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

Counties Gilmer County, GA, Murray County, GA

The radar

The Northeast Alabama radar (KHTX), 131 km from the middle of the area, began a volume at 23:06 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, 11.1 hours before the alert went out and 144 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 2022-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 661 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 12:00Z on 2022-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 36 square meters per square second.19395878Sfc1 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
661 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
676 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
36 m²/s²
0-3 km storm-relative helicity
60 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.7

Open this sounding in Storm Lab

The text

As transmitted.

207 
WGUS52 KFFC 192306
FFWFFC
GAC123-213-200515-
/O.NEW.KFFC.FF.W.0028.220819T2306Z-220820T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
706 PM EDT Fri Aug 19 2022

The National Weather Service in Peachtree City has issued a

* Flash Flood Warning for...
  West Central Gilmer County in north central Georgia...
  Southeastern Murray County in northwestern Georgia...

* Until 115 AM EDT Saturday.

* At 706 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1.5 and 2.5 inches of 
  rain have fallen. Additional rainfall amounts of 1 to 2 inches are 
  possible in the warned area. Flash flooding is ongoing or expected 
  to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Tails Creek and Carters.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3461 8480 3461 8483 3462 8485 3466 8484
      3469 8478 3469 8472 3477 8465 3476 8461
      3474 8454 3473 8452 3471 8451 3467 8452
      3464 8454 3461 8464 3460 8469 3461 8473
      3462 8472 3462 8474 3462 8475 3461 8475

FLASH FLOOD...RADAR INDICATED

$$
1 follow-up statement
206 
WGUS72 KFFC 200259
FFSFFC

Flash Flood Statement
National Weather Service Peachtree City GA
1059 PM EDT Fri Aug 19 2022

GAC123-213-200309-
/O.CAN.KFFC.FF.W.0028.000000T0000Z-220820T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Gilmer GA-Murray GA-
1059 PM EDT Fri Aug 19 2022

...FLASH FLOOD WARNING IS CANCELLED FOR WEST CENTRAL GILMER AND 
SOUTHEASTERN MURRAY COUNTIES...

Flooding is no longer expected to pose a threat. Please continue to 
heed remaining road closures.

LAT...LON 3461 8480 3461 8483 3462 8485 3466 8484
      3469 8478 3469 8472 3477 8465 3476 8461
      3474 8454 3473 8452 3471 8451 3467 8452
      3464 8454 3461 8464 3460 8469 3461 8473
      3462 8472 3462 8474 3462 8475 3461 8475

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 19, 3:34 PM EDTSpecial Weather StatementFFCJohnson26 min
Aug 19, 3:42 PM EDTSpecial Weather StatementFFCGordon33 min
Aug 19, 3:50 PM EDTSevere Thunderstorm WarningFFCChattooga, Floyd, Gordon, Walker, Whitfield40 min
Aug 19, 4:05 PM EDTSevere Thunderstorm WarningFFCEmanuel, Johnson, Laurens, Montgomery, Treutlen40 min
Aug 19, 4:31 PM EDTSpecial Weather StatementFFCGordon29 min
Aug 19, 4:42 PM EDTSevere Thunderstorm WarningFFCEmanuel33 min
Aug 19, 4:55 PM EDTFlash Flood WarningFFCChattooga, Dade, Gordon, Walker, Whitfield4 hr
Aug 19, 5:30 PM EDTFlash Flood WarningFFCFannin, Murray, Walker, Whitfield4 hr
Aug 19, 7:00 PM EDTSpecial Weather StatementFFCCarroll, Haralson30 min
Aug 19, 7:42 PM EDTSpecial Weather StatementFFCHouston33 min
Aug 19, 7:43 PM EDTSpecial Weather StatementFFCToombs32 min

Nearby

Flash Flood Warnings in Georgia, 2022Every flash flood warning in 2022

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.