Alert archive / Georgia / Flash Flood Warnings in 2003

Flash Flood Warning 32, NWS Charleston, SC

August 18, 2003McIntosh County, Georgia

NWS Charleston, SC issued this flash flood warning at Aug 18, 2003, 9:45 PM EDT for McIntosh 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 18, 2003, 9:45 PM EDT (01:45 UTC)
Expired: Aug 18, 2003, 11:45 PM EDT
In force: 2 hr
Issued by: NWS Charleston, SC
Area: Counties, with a storm outline in the text

County McIntosh County, GA

The nearest sounding before it

Jacksonville, FL (KJAX), launched 00:00Z, 1.8 hours before the alert went out and 117 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: 1289 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 1091 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 15 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 KCHS 190146
FFWCHS
GAC191-190345-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
945 PM EDT MON AUG 18 2003

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MCINTOSH COUNTY IN SOUTHEAST GEORGIA...

* UNTIL 1145 PM EDT

* AT 945 PM EDT...LAW ENFORCEMENT OFFICIALS REPORTED FLOODING IN 
  DARIEN.  HEAVY RAIN WILL CONTINUE FOR THE NEXT 1 TO 2 HOURS.

* FLASH FLOODING WILL ALSO OCCUR IN AND AROUND...
  SAPELO ISLAND AND RIDGEVILLE...

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

LAT...LON 3146 8147 3128 8150 3103 8015 3139 8009

$$

2 follow-up statements

000 
WGUS72 KCHS 190252
FFSCHS
GAC191-190345-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
1052 PM EDT MON AUG 18 2003

...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR MCINTOSH COUNTY UNTIL
1145 PM EDT...

AT 1050 PM...NATIONAL WEATHER SERVICE RADAR INDICATED THAT THE 
HEAVIEST RAIN HAD SHIFTED INLAND FROM DARIEN AND WAS AFFECTING AREAS 
MAINLY WEST OF INTERSTATE 95.  SOME FLOODING IS POSSIBLE IN THOSE 
AREAS. ALSO...THE HEAVY COULD MOVE BACK INTO THE DARIEN AREA OVER 
THE NEXT HOUR. 

STAY TUNED TO NOAA WEATHER RADIO OR THE LOCAL MEDIA FOR ADDITIONAL
SEVERE WEATHER INFORMATION. REPORT ANY FLOODING OR DAMAGE CAUSED BY
FLOODING TO LOCAL LAW ENFORCEMENT OFFICIALS AND ASK THEM TO
IMMEDIATELY RELAY THE REPORT TO THE NATIONAL WEATHER SERVICE IN
CHARLESTON.

LAT...LON 3136 8152 3152 8169 3158 8157 3170 8149
          3165 8145 3166 8126 3160 8119 3154 8124
          3152 8117 3138 8127 3131 8127 3128 8141

$$

SCW

000 
WGUS72 KCHS 190347
FFSCHS
GAC191-190400-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
1145 PM EDT MON AUG 18 2003

...THE FLASH FLOOD WARNING FOR MCINTOSH COUNTY HAS BEEN ALLOWED TO 
EXPIRE AT 1145 PM...

AT 1145 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR IN CHARLESTON 
INDICATES THAT THE THUNDERSTORMS OVER MCINTOSH COUNTY ARE BEGINNING 
TO WEAKEN.  WHILE AREAS NEAR DARIEN AND ALONG INTERSTATE 95 MAY 
STILL EXPERIENCE SOME PONDING OF WATER FROM EARLIER STORMS...THERE 
IS NO LONGER A THREAT OF FLASH FLOODING.  

MOTORISTS ARE URGED TO USE EXTREME CAUTION TONIGHT AS SOME ROADS 
WILL REMAIN FLOODED FOR THE NEXT FEW HOURS.  IF YOU SEE A FLOODED 
ROAD...DO NOT TRY TO DRIVE THROUGH IT.  TURN AROUND AND FIND AN 
ALTERNATE ROUTE.

STAY TUNED TO NOAA WEATHER RADIO OR THE LOCAL MEDIA FOR ADDITIONAL 
SEVERE WEATHER INFORMATION. 

$$

PY

Nearby

Flash Flood Warnings in Georgia, 2003 Every flash flood warning in 2003

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.