Alert archive / Georgia / Flash Flood Warnings in 2018

Flash Flood Warning 19, NWS Tallahassee, FL

December 1, 20184 counties in Georgia

NWS Tallahassee, FL issued this flash flood warning at Dec 1, 2018, 11:48 PM EST 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: Dec 1, 2018, 11:48 PM EST (04:48 UTC)
Expired: Dec 2, 2018, 2:45 AM EST
In force: 3 hr
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon
Flood severity: None

Counties Calhoun County, GA, Lee County, GA, Randolph County, GA, Terrell County, GA

The radar

The Robins AFB radar (KJGX), 123 km from the middle of the area, began a volume at 04:50 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

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 4.8 hours before the alert went out and 159 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: 262 J/kg
Mixed-layer CIN: -110 J/kg
Mixed-layer LCL: 507 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 394 m²/s²
0-3 km storm-relative helicity: 472 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

As transmitted.

799 
WGUS52 KTAE 020448
FFWTAE
GAC037-177-243-273-020745-
/O.NEW.KTAE.FF.W.0019.181202T0448Z-181202T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tallahassee FL
1148 PM EST SAT DEC 1 2018

The National Weather Service in Tallahassee has issued a

* Flash Flood Warning for...
  Southeastern Randolph County in southwestern Georgia...
  Lee County in southwestern Georgia...
  North central Calhoun County in southwestern Georgia...
  Terrell County in southwestern Georgia...

* Until 245 AM EST.

* At 1147 PM EST, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Two to two and a half inches of 
  rain have already fallen and another round of rain is expected 
  later tonight. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Dawson, Leesburg, Shellman, Smithville, Sasser, Bronwood, Chokee,
  Clarks Mill, Dawson Municipal A/P, Aycock Mill, Olivers Mill,
  Neyami, Martins Crossroads, Chickasawhatchee, Bridges Crossroad,
  Herod, Jordan Place, Yeomans, Starksville and Graves.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3191 8392 3184 8395 3183 8397 3180 8398
      3180 8401 3179 8401 3157 8465 3170 8475
      3189 8436 3187 8434 3190 8434 3192 8431

$$

11-NGUYEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 1, 7:40 PM EST	Flash Flood Warning	TAE	Decatur, Grady, Seminole	4 hr
Dec 1, 7:43 PM EST	Special Weather Statement	TAE	Berrien, Lanier	47 min
Dec 1, 8:36 PM EST	Flash Flood Warning	TAE	Seminole	2 hr
Dec 1, 9:54 PM EST	Areal Flood Advisory	TAE	Brooks, Lanier, Lowndes	2 hr
Dec 1, 9:59 PM EST	Areal Flood Advisory	TAE	Calhoun, Dougherty, Lee, Terrell	2 hr
Dec 1, 10:46 PM EST	Areal Flood Advisory	TAE	Calhoun, Lee, Randolph, Terrell	59 min
Dec 1, 11:43 PM EST	Special Weather Statement	TAE	Baker, Calhoun, Early	47 min
Dec 2, 12:23 AM EST	Severe Thunderstorm Warning	TAE	Baker, Calhoun, Dougherty, Lee, Terrell	37 min
Dec 2, 12:27 AM EST	Severe Thunderstorm Warning	TAE	Clay, Early	48 min
Dec 2, 1:25 AM EST	Severe Thunderstorm Warning	TAE	Baker, Calhoun, Dougherty, Early, Terrell	50 min
Dec 2, 1:40 AM EST	Tornado Warning	TAE	Calhoun, Dougherty, Lee, Terrell	35 min
Dec 2, 2:01 AM EST	Severe Thunderstorm Warning	TAE	Dougherty, Lee, Worth	44 min
Dec 2, 2:16 AM EST	Tornado Warning	TAE	Dougherty, Worth	29 min
Dec 2, 2:54 AM EST	Severe Thunderstorm Warning	TAE	Early	51 min
Dec 2, 3:26 AM EST	Severe Thunderstorm Warning	TAE	Calhoun, Clay, Dougherty, Early, Randolph, Terrell	49 min
Dec 2, 3:43 AM EST	Areal Flood Advisory	TAE	Baker, Calhoun, Clay, Dougherty, Early, Lee and 3 more	2 hr
Dec 2, 4:01 AM EST	Severe Thunderstorm Warning	TAE	Baker, Calhoun, Dougherty, Early, Lee, Mitchell and 3 more	44 min
Dec 2, 4:14 AM EST	Flash Flood Warning	TAE	Calhoun, Dougherty, Lee, Randolph, Terrell, Worth	3 hr
Dec 2, 4:27 AM EST	Tornado Warning	TAE	Dougherty, Lee, Turner, Worth	33 min
Dec 2, 4:50 AM EST	Severe Thunderstorm Warning	TAE	Ben Hill, Irwin, Tift, Turner, Worth	40 min
Dec 2, 5:08 AM EST	Severe Thunderstorm Warning	TAE	Baker, Dougherty, Mitchell, Tift, Turner, Worth	31 min
Dec 2, 5:20 AM EST	Severe Thunderstorm Warning	TAE	Clay, Early, Miller	40 min
Dec 2, 5:41 AM EST	Areal Flood Advisory	TAE	Baker, Calhoun, Clay, Dougherty, Early, Lee and 3 more	2 hr
Dec 2, 8:03 AM EST	Severe Thunderstorm Warning	TAE	Seminole	42 min
Dec 2, 8:33 AM EST	Severe Thunderstorm Warning	TAE	Decatur, Miller, Seminole	27 min
Dec 2, 8:36 AM EST	Tornado Warning	TAE	Colquitt, Mitchell, Tift, Worth	39 min
Dec 2, 8:49 AM EST	Severe Thunderstorm Warning	TAE	Decatur, Miller, Seminole	16 min
Dec 2, 8:57 AM EST	Severe Thunderstorm Warning	TAE	Baker, Dougherty, Miller, Mitchell	33 min
Dec 2, 9:12 AM EST	Tornado Warning	TAE	Berrien, Colquitt, Cook, Tift, Worth	35 min
Dec 2, 9:24 AM EST	Severe Thunderstorm Warning	TAE	Decatur, Grady, Mitchell, Seminole	51 min
Dec 2, 9:27 AM EST	Severe Thunderstorm Warning	TAE	Baker, Colquitt, Dougherty, Mitchell, Tift, Turner and 1 more	36 min
Dec 2, 9:50 AM EST	Severe Thunderstorm Warning	TAE	Colquitt, Decatur, Grady, Mitchell, Thomas	40 min
Dec 2, 9:59 AM EST	Severe Thunderstorm Warning	TAE	Berrien, Irwin, Tift	46 min
Dec 2, 10:07 AM EST	Severe Thunderstorm Warning	TAE	Brooks, Lowndes, Thomas	23 min
Dec 2, 10:12 AM EST	River Flood Warning	TAE	Lee	47 hr
Dec 2, 10:12 AM EST	River Flood Warning	TAE	Decatur	4 days
Dec 2, 11:08 AM EST	River Flood Warning	TAE	Grady, Thomas	5 days
Dec 2, 11:08 AM EST	River Flood Warning	TAE	Brooks, Lowndes	7 days
Dec 2, 1:15 PM EST	River Flood Warning	TAE	Lee	45 hr
Dec 2, 2:32 PM EST	Special Weather Statement	TAE	Lanier	43 min
Dec 2, 3:26 PM EST	Special Weather Statement	TAE	Lowndes	49 min
Dec 2, 4:27 PM EST	Severe Thunderstorm Warning	TAE	Brooks, Lowndes	33 min
Dec 2, 5:00 PM EST	Special Weather Statement	TAE	Lowndes	30 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.