Alert archive / Georgia / Flash Flood Warnings in 2018

Flash Flood Warning 13, NWS Tallahassee, FL

October 10, 2018Dougherty County, Lee County, Georgia

NWS Tallahassee, FL issued this flash flood warning at Oct 10, 2018, 8:27 PM EDT for Dougherty County, Lee County, 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
Oct 10, 2018, 8:27 PM EDT (00:27 UTC)
Expired
Oct 10, 2018, 11:15 PM EDT
In force
3 hr
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon
Flood severity
None

Counties Dougherty County, GA, Lee County, GA

The radar

The Robins AFB radar (KJGX), 127 km from the middle of the area, began a volume at 00:30 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, 0.5 hours before the alert went out and 187 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 2018-10-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 382 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 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 2018-10-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 308 square meters per square second.193958Sfc1 km3 km6 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
382 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
474 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
308 m²/s²
0-3 km storm-relative helicity
350 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.4

Open this sounding in Storm Lab

The text

As transmitted.

984 
WGUS52 KTAE 110027
FFWTAE
GAC095-177-110315-
/O.NEW.KTAE.FF.W.0013.181011T0027Z-181011T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tallahassee FL
Issued by National Weather Service Jacksonville FL
827 PM EDT WED OCT 10 2018

The National Weather Service in Tallahassee has issued a

* Flash Flood Warning for...
  Eastern Dougherty County in southwestern Georgia...
  Lee County in southwestern Georgia...

* Until 1115 PM EDT.

* At 819 PM EDT, Doppler radar indicated heavy rain due to Hurricane 
  Michael across the warned area. Up to three to four inches of rain 
  have already fallen. Flash flooding imminent or already occurring.

* Some locations that will experience flooding include...
  Leesburg, Putney, Albany, Smithville, East Albany, Marine Corps
  Logistics Base, Turner City, Chokee, Stocks and Radium Springs.

Additional rainfall amounts of 1 to 3 are possible in the warned 
area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3191 8392 3186 8393 3180 8398 3180 8401
      3176 8399 3172 8403 3165 8402 3165 8399
      3163 8401 3156 8398 3155 8400 3144 8400
      3144 8412 3162 8418 3162 8431 3175 8429
      3183 8426 3187 8430 3187 8434 3192 8434

$$

MCGINNIS

The office that day

Everything else NWS Tallahassee, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 10, 9:01 PM EDTFlash Flood WarningTAEQuitman, Randolph, Terrell4 hr
Oct 10, 9:52 PM EDTRiver Flood WarningTAELee13 hr
Oct 10, 9:56 PM EDTRiver Flood WarningTAETerrell, Webster13 hr
Oct 10, 9:56 PM EDTRiver Flood WarningTAELee72 hr
Oct 10, 10:00 PM EDTRiver Flood WarningTAEDougherty12 hr
Oct 10, 10:00 PM EDTRiver Flood WarningTAEBaker, Mitchell13 hr
Oct 10, 10:00 PM EDTRiver Flood WarningTAEDecatur7 days

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.