Alert archive / Georgia / Flash Flood Warnings in 2014

Flash Flood Warning 21, NWS Greenville-Spartanburg, SC

August 9, 2014Habersham County, Rabun County, Georgia

NWS Greenville-Spartanburg, SC issued this flash flood warning at Aug 9, 2014, 10:28 PM EDT for Habersham County, Rabun County, Georgia. It was in force for 4 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
Aug 9, 2014, 10:28 PM EDT (02:28 UTC)
Expired
Aug 10, 2014, 2:30 AM EDT
In force
4 hr
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon
Flood severity
None

Counties Habersham County, GA, Rabun County, GA

The radar

The Greer radar (KGSP), 129 km from the middle of the area, began a volume at 02:28 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
Aug 9, 11:59 PM EDTHEAVY RAIN 5.763 Ne Batesville, GA4.54 INCHES OF RAIN FELL BETWEEN 900PM AND 1045PM.

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, 2.5 hours before the alert went out and 173 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 2014-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 321 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 2014-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -68 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
321 J/kg
Mixed-layer CIN
-45 J/kg
Mixed-layer LCL
1237 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
-68 m²/s²
0-3 km storm-relative helicity
-3 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

111 
WGUS52 KGSP 100228
FFWGSP
GAC137-241-100630-
/O.NEW.KGSP.FF.W.0021.140810T0228Z-140810T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1028 PM EDT SAT AUG 9 2014

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN HABERSHAM COUNTY IN NORTHEAST GEORGIA...
  SOUTHWESTERN RABUN COUNTY IN NORTHEAST GEORGIA...

* UNTIL 230 AM EDT

* AT 1025 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE      
  WARNED AREA. RADAR ESTIMATED THAT AROUND 2 TO 4 INCHES OF RAIN HAS 
  FALLEN OVER NORTH OF BATESVILLE AREA OVER THE PAST 2 HOURS.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  CLARKESVILLE...BATESVILLE...LAKE BURTON...LAKE RABUN...NACOOHE LAKE
  AND TURNERVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO
NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO
ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN
WATER BEGINS RISING.

PLEASE REPORT HIGH WATER...FLOODING...LANDSLIDES OR OTHER SEVERE
WEATHER TO THE NATIONAL WEATHER SERVICE GREENVILLE SPARTANBURG BY
CALLING TOLL FREE...1...800...2 6 7...8 1 0 1...OR BY POSTING ON OUR
FACEBOOK PAGE...OR TWEET IT USING HASHTAG NWSGSP. YOUR MESSAGE SHOULD
DESCRIBE THE EVENT AND THE SPECIFIC LOCATION WHERE IT OCCURRED.

&&

LAT...LON 3482 8366 3484 8367 3486 8365 3486 8344
      3461 8342 3460 8365 3463 8365 3466 8367
      3468 8365 3476 8363 3479 8368 3481 8368

$$

JOH
1 follow-up statement
041 
WGUS72 KGSP 100444
FFSGSP

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1244 AM EDT SUN AUG 10 2014

GAC137-241-100459-
/O.CAN.KGSP.FF.W.0021.000000T0000Z-140810T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
RABUN GA-HABERSHAM GA-
1244 AM EDT SUN AUG 10 2014

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTHERN HABERSHAM
AND SOUTHWESTERN RABUN COUNTIES IS CANCELLED...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT HIGH WATER...FLOODING...LANDSLIDES OR OTHER SEVERE
WEATHER TO THE NATIONAL WEATHER SERVICE GREENVILLE SPARTANBURG BY
CALLING TOLL FREE...1...800...2 6 7...8 1 0 1...OR BY POSTING ON OUR
FACEBOOK PAGE...OR TWEET IT USING HASHTAG NWSGSP. YOUR MESSAGE SHOULD
DESCRIBE THE EVENT AND THE SPECIFIC LOCATION WHERE IT OCCURRED.

&&

LAT...LON 3482 8366 3484 8367 3486 8365 3486 8344
      3461 8342 3460 8365 3463 8365 3466 8367
      3468 8365 3476 8363 3479 8368 3481 8368

$$

JOH

The office that day

Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 9, 10:11 PM EDTAreal Flood AdvisoryGSPHabersham, Rabun3 hr
Aug 9, 11:28 PM EDTAreal Flood AdvisoryGSPRabun, Stephens3 hr

Nearby

Flash Flood Warnings in Georgia, 2014Every flash flood warning in 2014

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.