Alert archive / Georgia / Flash Flood Warnings in 2017

Flash Flood Warning 30, NWS Atlanta, GA

July 8, 2017Washington County, Wilkinson County, Georgia

NWS Atlanta, GA issued this flash flood warning at Jul 8, 2017, 8:06 PM EDT for Washington County, Wilkinson County, Georgia. It was in force for 6 hr. 1 report 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 8, 2017, 8:06 PM EDT (00:06 UTC)
Expired
Jul 9, 2017, 2:00 AM EDT
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

Counties Washington County, GA, Wilkinson County, GA

The radar

The Robins AFB radar (KJGX), 42 km from the middle of the area, began a volume at 00:09 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

TimeReportWhereRemark
Jul 8, 9:00 PM EDTFLOODTabernacle, GAREPORTS OF FLOODING ALONG HWY 24 W

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

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 0.1 hours before the alert went out and 142 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 2017-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 633 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 00:00Z on 2017-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 9 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
633 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
1325 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
9 m²/s²
0-3 km storm-relative helicity
25 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

669 
WGUS52 KFFC 090006
FFWFFC
GAC303-319-090600-
/O.NEW.KFFC.FF.W.0030.170709T0006Z-170709T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
806 PM EDT SAT JUL 8 2017

The National Weather Service in Peachtree City has issued a

* Flash Flood Warning for...
  Northeastern Wilkinson County in central Georgia...
  West central Washington County in east central Georgia...

* Until 200 AM EDT

* At 804 PM EDT, National Weather Service radar estimates 2 to 3 
  inches of rain have fallen. County officials are reporting 
  flooding in the area. dditional flash flooding is likely.

* Some locations that will experience flooding include...
  Deepstep and Hebron. 

Additional rainfall amounts of 0.5 to 1 inch will be possible in the 
warned area. Even as the rain tapers off, creeks and streams will 
continue to rise leading to additional flash flooding.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you see significant flooding call the National Weather Service
toll free at 1 8 6 6 7 6 3 4 4 6 6 or tweet us your report at 
NWSATLANTA. Remember, never drive into water of unknown depth. Turn 
around and don't drown.

&&

LAT...LON 3288 8313 3294 8316 3297 8311 3295 8307
      3297 8307 3297 8306 3298 8305 3300 8305
      3301 8304 3302 8291 3292 8288

$$
1 follow-up statement
728 
WGUS72 KFFC 090441
FFSFFC

Flash Flood Statement
National Weather Service Peachtree City GA
1241 AM EDT SUN JUL 9 2017

GAC303-319-090451-
/O.CAN.KFFC.FF.W.0030.000000T0000Z-170709T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Wilkinson GA-Washington GA-
1241 AM EDT SUN JUL 9 2017

...THE FLASH FLOOD WARNING FOR NORTHEASTERN WILKINSON AND WEST
CENTRAL WASHINGTON COUNTIES IS CANCELLED...

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

LAT...LON 3288 8313 3294 8316 3297 8311 3295 8307
      3297 8307 3297 8306 3298 8305 3300 8305
      3301 8304 3302 8291 3292 8288

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 8, 8:13 PM EDTSpecial Weather StatementFFCTaliaferro32 min
Jul 8, 8:28 PM EDTSpecial Weather StatementFFCTaliaferro, Warren47 min
Jul 8, 8:52 PM EDTSpecial Weather StatementFFCGreene23 min
Jul 8, 9:13 PM EDTSpecial Weather StatementFFCGreene, Taliaferro47 min
Jul 9, 5:10 PM EDTSpecial Weather StatementFFCSchley35 min
Jul 9, 6:48 PM EDTSpecial Weather StatementFFCUpson27 min
Jul 9, 7:01 PM EDTSpecial Weather StatementFFCCrawford29 min
Jul 9, 7:03 PM EDTSevere Thunderstorm WarningFFCCrawford, Monroe42 min
Jul 9, 7:51 PM EDTSpecial Weather StatementFFCBibb24 min

Nearby

Flash Flood Warnings in Georgia, 2017Every flash flood warning in 2017

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.