Alert archive / Georgia / Flash Flood Warnings in 2018

Flash Flood Warning 12, NWS Atlanta, GA

May 25, 2018Dooly County, Houston County, Macon County, Georgia

NWS Atlanta, GA issued this flash flood warning at May 25, 2018, 6:42 PM EDT for Dooly County, Houston County, Macon 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
May 25, 2018, 6:42 PM EDT (22:42 UTC)
Expired
May 26, 2018, 12:45 AM EDT
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

Counties Dooly County, GA, Houston County, GA, Macon County, GA

The radar

The Robins AFB radar (KJGX), 82 km from the middle of the area, began a volume at 22:44 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, 10.7 hours before the alert went out and 145 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 2018-05-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 644 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 12:00Z on 2018-05-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -2 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
644 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
497 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
-2 m²/s²
0-3 km storm-relative helicity
-15 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

335 
WGUS52 KFFC 252242
FFWFFC
GAC093-153-193-260445-
/O.NEW.KFFC.FF.W.0012.180525T2242Z-180526T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
642 PM EDT FRI MAY 25 2018

The National Weather Service in Peachtree City has issued a

* Flash Flood Warning for...
  Southeastern Macon County in west central Georgia...
  Western Dooly County in central Georgia...
  Southwestern Houston County in central Georgia...

* Until 1245 AM EDT Saturday.

* At 641 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Two to three and a half inches 
  of rain have fallen. Flash flooding is expected to begin shortly. 
  Trees can down more easily with wet soils also.

* Some locations that will experience flooding include...
  Unadilla, Byromville, Lilly, Dooling, Drayton, Flint River Wma,
  Elko, Grove Park and Henderson.

Additional rainfall amounts of one to two inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Please report flooding to your local law enforcement agency when you
can do so safely.

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.

&&

LAT...LON 3203 8393 3207 8399 3209 8398 3210 8400
      3211 8400 3212 8401 3213 8401 3215 8403
      3217 8403 3217 8404 3240 8391 3238 8367

$$
1 follow-up statement
958 
WGUS72 KFFC 260440
FFSFFC

Flash Flood Statement
National Weather Service Peachtree City GA
1240 AM EDT SAT MAY 26 2018

GAC093-153-193-260447-
/O.EXP.KFFC.FF.W.0012.000000T0000Z-180526T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Macon GA-Dooly GA-Houston GA-
1240 AM EDT SAT MAY 26 2018

...THE FLASH FLOOD WARNING FOR SOUTHEASTERN MACON...WESTERN DOOLY AND
SOUTHWESTERN HOUSTON COUNTIES WILL EXPIRE AT 1245 AM EDT...

It has been several hours since the heavy rain has moved out of the 
area and rapidly rising water from Flash Flooding is no longer 
expected to pose a threat. However, creeks and streams are still 
likely to be running high, and some roads may still have some 
ponding of water in low areas, please continue to heed any remaining 
road closures.

LAT...LON 3203 8393 3207 8399 3209 8398 3210 8400
      3211 8400 3212 8401 3213 8401 3215 8403
      3217 8403 3217 8404 3240 8391 3238 8367

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 24, 8:17 PM EDTSpecial Weather StatementFFCNewton, Rockdale43 min
May 24, 8:49 PM EDTSpecial Weather StatementFFCDeKalb, Henry41 min
May 24, 9:18 PM EDTSpecial Weather StatementFFCCherokee27 min
May 24, 9:44 PM EDTSpecial Weather StatementFFCCherokee46 min
May 25, 1:58 PM EDTSpecial Weather StatementFFCDooly32 min
May 25, 3:38 PM EDTSpecial Weather StatementFFCGlascock37 min
May 25, 3:42 PM EDTSpecial Weather StatementFFCWilkes33 min
May 25, 3:51 PM EDTSpecial Weather StatementFFCMarion24 min
May 25, 4:17 PM EDTSpecial Weather StatementFFCMarion28 min
May 25, 4:30 PM EDTRiver Flood WarningFFCBibb, Crawford, Houston, Peach13 hr
May 25, 4:49 PM EDTSpecial Weather StatementFFCMacon26 min
May 25, 4:55 PM EDTSevere Thunderstorm WarningFFCDooly, Houston, Macon35 min
May 25, 5:29 PM EDTSpecial Weather StatementFFCDooly31 min
May 25, 5:36 PM EDTSpecial Weather StatementFFCHouston24 min
May 25, 5:52 PM EDTSpecial Weather StatementFFCDooly38 min
May 25, 6:10 PM EDTSevere Thunderstorm WarningFFCDooly, Macon, Sumter50 min
May 25, 6:22 PM EDTSevere Thunderstorm WarningFFCJohnson, Washington38 min
May 25, 6:24 PM EDTSevere Thunderstorm WarningFFCBleckley, Dodge, Laurens51 min
May 25, 7:14 PM EDTSpecial Weather StatementFFCWashington46 min
May 25, 7:44 PM EDTSpecial Weather StatementFFCWilkinson31 min

Nearby

Flash Flood Warnings in Georgia, 2018Every 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.