Alert archive / Georgia / Flash Flood Warnings in 2002

Flash Flood Warning 13, NWS Charleston, SC

October 11, 2002Chatham County, Georgia

NWS Charleston, SC issued this flash flood warning at Oct 11, 2002, 5:33 AM EDT for Chatham County, Georgia. It was in force for 117 min. 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 11, 2002, 5:33 AM EDT (09:33 UTC)
Expired
Oct 11, 2002, 7:30 AM EDT
In force
117 min
Issued by
NWS Charleston, SC
Area
Counties, with a storm outline in the text

County Chatham County, GA

The radar

The Charleston,SC radar (KCLX), 76 km from the middle of the area, began a volume at 09:33 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

Charleston AFB, SC (KCHS), launched 00:00Z, 9.6 hours before the alert went out and 152 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, Charleston AFB, SC at 00:00Z on 2002-10-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2149 joules per kilogram.LCLEL10008507005003002001001 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, Charleston AFB, SC at 00:00Z on 2002-10-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 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
2149 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
467 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
118 m²/s²
Significant tornado parameter
0.6
Supercell composite
4.4

Open this sounding in Storm Lab

The text

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

000 
WGUS52 KCHS 110933
FFWCHS
GAC051-111130-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
532 AM EDT FRI OCT 11 2002

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL CHATHAM COUNTY IN SOUTHEAST GEORGIA.

* UNTIL 730 AM EDT.

* AT 532 AM EDT...RADAR INDICATED VERY HEAVY RAIN OCCURRING 3 MILES
  EAST OF BURROUGHS. THE THUNDERSTORMS PRODUCING THE FLOODING ARE
  MOVING SOUTHWEST AT 5 MPH.

* SOME LOCATIONS AFFECTED INCLUDE... BURROUGHS...WHITE BLUFF AND
  WINDSOR FOREST.

EXCESSIVE RUNOFF FROM THESE STORMS WILL CAUSE RAPID FLOODING OF
ROADWAYS...SMALL CREEKS AND STREAMS...LOW-LYING AREAS AND DITCHES.

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

LAT...LON 3199 8129 3190 8121 3200 8107 3207 8118

$$

PY
1 follow-up statement
000 
WGUS72 KCHS 111043
FFSCHS
GAC051-111130-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
631 AM EDT FRI OCT 11 2002

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR CENTRAL CHATHAM COUNTY 
UNTIL 730 AM...

AT 630 AM...SAVANNAH EMERGENCY PERSONNEL INDICATE THAT SOME STREETS 
ACROSS SAVANNAH ARE FLOODED WITH SOME VEHICLES BEING STRANDED NEAR 
ABERCORN.  THE FLASH FLOOD WARNING WILL REMAIN IN EFFECT THROUGH 730 
AM FOR CENTRAL CHATHAM COUNTY INCLUDING THE SAVANNAH METRO AREA.  
THE RAINFALL WHICH PRODUCED THE FLOODING HAS SINCE DISSIPATED...AND 
WATER WILL BEGIN TO RECEDE WITHIN THE HOUR.  ADDITIONAL RAINFALL 
THIS MORNING WILL LIKELY CAUSE MORE PONDING OF WATER AND FLOODING OF 
STREETS.  

BE ESPECIALLY CAUTIOUS AT NIGHT SINCE IT IS HARDER TO RECOGNIZE THE 
DANGERS OF FLOODING. USE CAUTION IN AND AROUND STREAMS...CREEKS AND 
DRAINAGE DITCHES. TAKE THE SHORTEST PATH TO REACH HIGHER GROUND BUT 
DO NOT DRIVE INTO RISING OR FAST MOVING WATER

STAY TUNED TO NOAA WEATHER RADIO AND THE NATIONAL WEATHER SERVICE IN 
CHARLESTON FOR FURTHER UPDATES.

$$

PY

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.