Alert archive / Georgia / Flash Flood Warnings in 2018

Flash Flood Warning 44, NWS Atlanta, GA

September 24, 20184 counties in Georgia

NWS Atlanta, GA issued this flash flood warning at Sep 24, 2018, 11:35 PM EDT for 4 counties in Georgia. It was in force for 3 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: Sep 24, 2018, 11:35 PM EDT (03:35 UTC)
Expired: Sep 25, 2018, 2:19 AM EDT
In force: 3 hr
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Flood severity: None

Counties Gordon County, GA, Murray County, GA, Walker County, GA, Whitfield County, GA

The radar

The Northeast Alabama radar (KHTX), 105 km from the middle of the area, began a volume at 03:38 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, 3.6 hours before the alert went out and 153 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 990 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 1067 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 157 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

199 
WGUS52 KFFC 250335
FFWFFC
GAC129-213-295-313-250930-
/O.NEW.KFFC.FF.W.0044.180925T0335Z-180925T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
1135 PM EDT MON SEP 24 2018

The National Weather Service in Peachtree City has issued a

* Flash Flood Warning for...
  Southwestern Murray County in northwestern Georgia...
  Whitfield County in northwestern Georgia...
  Southeastern Walker County in northwestern Georgia...
  Northwestern Gordon County in northwestern Georgia...

* Until 530 AM EDT.

* At 1133 PM EDT, gauge reports indicated the Dalton river near Mill 
  Creek approaching flood stage quickly. Up to two inches of rain 
  have already fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Dalton, Calhoun, Chatsworth, Varnell, Eton, Tunnel Hill, Resaca,
  Crandall, Rocky Face, Redbud, Tilton, Audubon, Mill Creek,
  Dawnville, Villanow, Nickelsville, North Georgia Speedway and Sugar
  Valley.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3487 8472 3450 8477 3457 8506 3459 8507
      3458 8511 3459 8516 3480 8507 3488 8501

$$

1 follow-up statement

883 
WGUS72 KFFC 250619
FFSFFC

Flash Flood Statement
National Weather Service Peachtree City GA
219 AM EDT TUE SEP 25 2018

GAC129-213-295-313-250629-
/O.CAN.KFFC.FF.W.0044.000000T0000Z-180925T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Murray GA-Whitfield GA-Walker GA-Gordon GA-
219 AM EDT TUE SEP 25 2018

...THE FLASH FLOOD WARNING FOR SOUTHWESTERN MURRAY...WHITFIELD...
SOUTHEASTERN WALKER AND NORTHWESTERN GORDON COUNTIES IS CANCELLED...

The heavy rain has ended although the light rain will continue. 
Flooding is no longer expected to pose a threat. Please continue to 
heed any remaining road closures.

LAT...LON 3487 8472 3450 8477 3457 8506 3459 8507
      3458 8511 3459 8516 3480 8507 3488 8501

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 24, 8:39 PM EDT	Special Weather Statement	FFC	Chattooga	36 min
Sep 24, 9:01 PM EDT	Special Weather Statement	FFC	Chattooga, Walker	29 min
Sep 24, 9:11 PM EDT	Special Weather Statement	FFC	Dade	34 min
Sep 24, 9:32 PM EDT	Special Weather Statement	FFC	Catoosa, Walker	28 min
Sep 24, 9:34 PM EDT	Special Weather Statement	FFC	Dade	41 min
Sep 24, 10:01 PM EDT	Special Weather Statement	FFC	Catoosa	29 min
Sep 24, 10:05 PM EDT	Special Weather Statement	FFC	Carroll	25 min
Sep 24, 10:16 PM EDT	Special Weather Statement	FFC	Bartow	29 min
Sep 24, 10:36 PM EDT	Special Weather Statement	FFC	Bartow, Douglas, Paulding	24 min
Sep 24, 10:45 PM EDT	Special Weather Statement	FFC	Gordon	30 min
Sep 24, 11:07 PM EDT	Special Weather Statement	FFC	Bartow, Douglas, Paulding	23 min
Sep 24, 11:39 PM EDT	Special Weather Statement	FFC	Bartow, Cherokee	36 min
Sep 25, 12:34 AM EDT	Special Weather Statement	FFC	Paulding	41 min
Sep 25, 1:42 AM EDT	Special Weather Statement	FFC	Cobb	48 min
Sep 25, 10:54 AM EDT	River Flood Warning	FFC	Whitfield	4 days
Sep 25, 5:42 PM EDT	Special Weather Statement	FFC	Stewart	33 min
Sep 25, 5:58 PM EDT	Special Weather Statement	FFC	Chattahoochee	32 min
Sep 25, 6:32 PM EDT	Special Weather Statement	FFC	Muscogee	28 min

Nearby

Flash Flood Warnings in Georgia, 2018 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.