Alert archive / Georgia / Flash Flood Warnings in 2008

Flash Flood Warning 13, NWS Tallahassee, FL

August 23, 2008Grady County, Thomas County, Georgia

NWS Tallahassee, FL issued this flash flood warning at Aug 23, 2008, 6:09 PM EDT for Grady County, Thomas County, Georgia. It was in force for 2 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: Aug 23, 2008, 6:09 PM EDT (22:09 UTC)
Expired: Aug 23, 2008, 8:15 PM EDT
In force: 2 hr
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon
Flood severity: None

Counties Grady County, GA, Thomas County, GA

The radar

The Tallahassee radar (KTLH), 65 km from the middle of the area, began a volume at 22:12 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 12:00Z, 10.2 hours before the alert went out and 64 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: 177 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 494 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 136 m²/s²
0-3 km storm-relative helicity: 142 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS52 KTAE 232209
FFWTAE
GAC131-275-240015-
/O.NEW.KTAE.FF.W.0013.080823T2209Z-080824T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
609 PM EDT SAT AUG 23 2008

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WESTERN THOMAS COUNTY IN SOUTH CENTRAL GEORGIA...
  THIS INCLUDES THE CITY OF THOMASVILLE...
  GRADY COUNTY IN SOUTHWEST GEORGIA...
  THIS INCLUDES THE CITY OF CAIRO...

* UNTIL 815 PM EDT

* AT 603 PM EDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LARGE
  BAND OF VERY HEAVY RAINFALL ASSOCIATED WITH TROPICAL STORM FAY
  CONTINUING TO FALL ACROSS EXTREME SOUTHWEST GEORGIA. WIDESPREAD
  RAINFALL RATES OF 3 TO 4 INCHES PER HOUR WITH ISOLATED AREAS OF
  4 TO 6 INCHES PER HOUR WILL CONTINUE THROUGH THE NEXT TWO HOURS.
  STORM TOTAL RAINFALL ESTIMATES SINCE FRIDAY MORNING ARE GENERALLY 15
  TO 20 INCHES IN THE WARNING AREA WITH A FEW LOCATIONS AS HIGH AS
  20 TO 25 INCHES.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO OCHLOCKNEE
  THOMASVILLE...CAIRO...AND MEIGS

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR
OCCURRING. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER
GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS
SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY.
DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF
UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE.

THIS IS A VERY DANGEROUS SITUATION.

REPORT FLOODING OR FLOOD DAMAGE TO THE NATIONAL WEATHER SERVICE
IN TALLAHASSEE AT (8 5 0) 9 4 2 8 8 3 3. OR...YOU MAY CONTACT THE
NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY EMERGENCY MANAGEMENT.
THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE.

LAT...LON 3108 8436 3107 8402 3103 8401 3103 8395
      3067 8383 3070 8427

$$

25-CAMP

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 23, 7:05 AM EDT	Areal Flood Warning	TAE	Baker, Berrien, Brooks, Colquitt, Cook, Decatur and 8 more	3 hr
Aug 23, 10:01 AM EDT	Areal Flood Warning	TAE	Baker, Berrien, Brooks, Colquitt, Cook, Decatur and 10 more	6 hr
Aug 23, 10:54 AM EDT	River Flood Warning	TAE	Grady, Thomas	4 days
Aug 23, 11:13 AM EDT	Flash Flood Warning	TAE	Baker, Decatur, Grady, Miller, Mitchell, Thomas	2 hr
Aug 23, 1:13 PM EDT	Flash Flood Warning	TAE	Baker, Brooks, Colquitt, Decatur, Grady, Miller and 2 more	3 hr
Aug 23, 4:18 PM EDT	Flash Flood Warning	TAE	Decatur, Grady, Thomas	117 min
Aug 23, 4:35 PM EDT	Tornado Warning	TAE	Berrien, Cook	25 min
Aug 23, 4:56 PM EDT	Tornado Warning	TAE	Berrien, Cook, Tift	34 min
Aug 23, 5:07 PM EDT	Flash Flood Warning	TAE	Berrien, Colquitt, Cook, Irwin, Lanier, Lowndes and 1 more	113 min
Aug 23, 5:07 PM EDT	Tornado Warning	TAE	Dougherty, Lee, Worth	38 min
Aug 23, 6:19 PM EDT	Flash Flood Warning	TAE	Lee, Worth	116 min

Nearby

Flash Flood Warnings in Georgia, 2008 Every flash flood warning in 2008

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.