Alert archive / Georgia / Flash Flood Warnings in 2002

Flash Flood Warning 3, NWS Atlanta, GA

July 11, 2002Union County, Georgia

NWS Atlanta, GA issued this flash flood warning at Jul 11, 2002, 9:50 PM EDT for Union 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
Jul 11, 2002, 9:50 PM EDT (01:50 UTC)
Expired
Jul 12, 2002, 12:45 AM EDT
In force
3 hr
Issued by
NWS Atlanta, GA
Area
Counties, with a storm outline in the text

County Union County, GA

The radar

The Knoxville radar (KMRX), 154 km from the middle of the area, began a volume at 01:51 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, 1.8 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 2002-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 692 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 2002-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 6 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
692 J/kg
Mixed-layer CIN
-43 J/kg
Mixed-layer LCL
776 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
6 m²/s²
0-3 km storm-relative helicity
39 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.

000 
WGUS52 KFFC 120150
FFWATL
GAC291-120445-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
943 PM EDT THU JUL 11 2002

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  UNION COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 1245 AM EDT

* AT 940 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  SHOWERS AND THUNDERSTORMS IN UNION COUNTY...ESPECIALLY ACROSS
  THE NORTHERN HALF OF THE COUNTY...NORTH OF BLAIRSVILLE AND EAST
  OF HIGHWAY 129. THESE SHOWERS AND STORMS WERE SHOWING LITTLE
  MOVEMENT.

EXCESSIVE RUNOFF WILL CAUSE FLASH FLOODING OF CREEKS
AND STREAMS...ROADS AND ROADSIDE CULVERTS. BE ESPECIALLY ALERT FOR
WASHED OUT ROADWAYS. THE HEAVY RAINS COULD ALSO
TRIGGER ROCK AND MUDSLIDES IN STEEP TERRAIN.

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

LAT...LON 3499 8412 3465 8409 3478 8383 3498 8395
2 follow-up statements
000 
WGUS72 KFFC 120246
FFSATL
GAC291-120445-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1045 PM EDT THU JUL 11 2002

...FLASH FLOOD WATCH IN EFFECT FOR UNION COUNTY UNTIL 1245 AM EDT...

AT 1040 PM LIGHT TO OCCASIONALLY MODERATE RAIN CONTINUED TO FALL 
OVER UNION COUNTY. THIS RAIN WAS FALLING OVER AREAS THAT HAD 
RECEIVED UP TO 3 INCHES EARLIER THIS EVENING. AS RUN OFF CONTINUES 
FROM THE CURRENT RAIN AND EARLIER RAINFALL...FLASH FLOODING IS 
LIKELY...THEREFORE THE FLASH FLOOD WARNING CONTINUES.
000 
WGUS72 KFFC 120249 CCA
FFSATL
GAC291-120445-

FLASH FLOOD STATEMENT...CORRECTED
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1047 PM EDT THU JUL 11 2002

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR UNION COUNTY UNTIL 1245 
AM EDT...

AT 1040 PM LIGHT TO OCCASIONALLY MODERATE RAIN CONTINUED TO FALL 
OVER UNION COUNTY. THIS RAIN WAS FALLING OVER AREAS THAT HAD 
RECEIVED UP TO 3 INCHES EARLIER THIS EVENING. AS RUN OFF CONTINUES 
FROM THE CURRENT RAIN AND EARLIER RAINFALL...FLASH FLOODING IS 
LIKELY...THEREFORE THE FLASH FLOOD WARNING CONTINUES.

Nearby

Flash Flood Warnings in Georgia, 2002Every flash flood warning in 2002

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.