Alert archive / Georgia / Flash Flood Warnings in 2019

Flash Flood Warning 23, NWS Atlanta, GA

July 12, 2019Dade County, Walker County, Georgia

NWS Atlanta, GA issued this flash flood warning at Jul 12, 2019, 4:10 PM EDT for Dade County, Walker County, Georgia. It was in force for 4 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: Jul 12, 2019, 4:10 PM EDT (20:10 UTC)
Expired: Jul 12, 2019, 8:10 PM EDT
In force: 4 hr
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Flood severity: None

Counties Dade County, GA, Walker County, GA

The radar

The Northeast Alabama radar (KHTX), 56 km from the middle of the area, began a volume at 20:14 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

Time	Report	Where	Remark
Jul 12, 4:30 PM EDT	FLASH FLOOD	1 Ne New England, GA	REPORT OF WATER ACROSS HWY 11 IN DADE COUNTY IN MULTIPLE LOCATIONS BETWEEN TRENTON AND WILDWOOD
Jul 12, 4:30 PM EDT	FLASH FLOOD	New England, GA	LOCALIZED FLOODING OFF OF HWY 11 NEAR THE INTERSECTION OF NEW ENGLAND RD AND MAINE AVE. PICTURES VIA TWITTER SHOW SHALLOW RUNNING WATER SURROUNDING A CHURCH.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 8.2 hours before the alert went out and 172 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: 489 J/kg
Mixed-layer CIN: -134 J/kg
Mixed-layer LCL: 991 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 68 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

697 
WGUS52 KFFC 122010
FFWFFC
GAC083-295-130215-
/O.NEW.KFFC.FF.W.0023.190712T2010Z-190713T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
410 PM EDT Fri Jul 12 2019

The National Weather Service in Peachtree City has issued a

* Flash Flood Warning for...
  Northwestern Walker County in northwestern Georgia...
  Dade County in northwestern Georgia...

* Until 1015 PM EDT Friday.

* At 410 PM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Flash flooding is expected to
  begin shortly.

* Some locations that will experience flooding include...
  Trenton, Lookout Mountain, Stephensville, Rising Fawn, New England,
  Morganville, Hooker, Cloudland Canyon State Park, Cooper Heights,
  Cole City, Wildwood and Chattanooga  Valley.

LAT...LON 3498 8533 3474 8541 3476 8556 3486 8559
      3498 8560

$$

1 follow-up statement

117 
WGUS72 KFFC 130010
FFSFFC

Flash Flood Statement
National Weather Service Peachtree City GA
810 PM EDT Fri Jul 12 2019

GAC083-295-130020-
/O.CAN.KFFC.FF.W.0023.000000T0000Z-190713T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Walker GA-Dade GA-
810 PM EDT Fri Jul 12 2019

...THE FLASH FLOOD WARNING FOR NORTHWESTERN WALKER AND DADE COUNTIES
IS CANCELLED...

Flood waters have receded. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.

LAT...LON 3498 8533 3474 8541 3476 8556 3486 8559
      3498 8560

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 8:14 PM EDT	Special Weather Statement	FFC	Lumpkin, White	31 min
Jul 11, 8:48 PM EDT	Special Weather Statement	FFC	White	12 min
Jul 11, 8:50 PM EDT	Special Weather Statement	FFC	Bartow	25 min
Jul 11, 9:12 PM EDT	Special Weather Statement	FFC	Bartow	33 min
Jul 11, 9:46 PM EDT	Special Weather Statement	FFC	Bartow	29 min
Jul 11, 11:24 PM EDT	Special Weather Statement	FFC	Dawson, Forsyth	51 min
Jul 12, 2:42 AM EDT	River Flood Warning	FFC	Gwinnett	101 min
Jul 12, 7:54 AM EDT	River Flood Warning	FFC	Forsyth, Fulton	18 hr
Jul 12, 3:34 PM EDT	Special Weather Statement	FFC	Dade	41 min
Jul 12, 4:26 PM EDT	Special Weather Statement	FFC	Laurens	34 min
Jul 12, 5:56 PM EDT	Special Weather Statement	FFC	Troup	34 min
Jul 12, 6:00 PM EDT	Special Weather Statement	FFC	Meriwether	30 min
Jul 12, 6:19 PM EDT	Special Weather Statement	FFC	Pickens	26 min

Nearby

Flash Flood Warnings in Georgia, 2019 Every flash flood warning in 2019

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.