Alert archive / Georgia / Flash Flood Warnings in 2003

Flash Flood Warning 1, NWS Charleston, SC

April 7, 2003Bryan County, Chatham County, Georgia; Jasper County, South Carolina

NWS Charleston, SC issued this flash flood warning at Apr 7, 2003, 6:35 PM EDT for Bryan County, Chatham County, Georgia; Jasper County, South Carolina. It was in force for 115 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: Apr 7, 2003, 6:35 PM EDT (22:35 UTC)
Expired: Apr 7, 2003, 8:30 PM EDT
In force: 115 min
Issued by: NWS Charleston, SC
Area: Counties, with a storm outline in the text

Counties Bryan County, GA, Chatham County, GA, Jasper County, SC

The radar

The Charleston,SC radar (KCLX), 67 km from the middle of the area, began a volume at 22:36 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 12:00Z, 10.6 hours before the alert went out and 144 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: 1293 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 468 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 149 m²/s²
0-3 km storm-relative helicity: 175 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 7.5

Open this sounding in Storm Lab

The text

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

000 
WGUS52 KCHS 072238
FFWCHS
GAC029-051-SCC053-080030-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
635 PM EDT MON APR 7 2003

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  JASPER COUNTY IN SOUTHEAST SOUTH CAROLINA...
  BRYAN COUNTY IN SOUTHEAST GEORGIA...
  CHATHAM COUNTY IN SOUTHEAST GEORGIA...

* UNTIL 830 PM EDT.

* AT 635 PM EDT...RADAR INDICATED VERY HEAVY RAIN OCCURRING ALONG A
  LINE EXTENDING FROM 3 MILES EAST OF MONTEITH TO 9 MILES SOUTHWEST
  OF KELLER. THE THUNDERSTORMS PRODUCING THE HEAVY RAIN ARE MOVING   
  SOUTHEAST AT 20 MPH.  RADAR ESTIMATES RAINFALL OF 3 TO 4 INCHES    
  ACROSS NORTHERN CHATHAM AND SOUTHERN JASPER COUNTIES.  IN          
  ADDITION...HEAVY RAINS OF UP TO 4 INCHES HAVE OCCURRED OVER        
  EXTREME SOUTHERN CHATHAM AND SOUTHERN BRYAN COUNTIES.

* FLASH FLOODING WILL OCCUR IN AND AROUND...
  GARDEN CITY AND BURROUGHS...
  WINDSOR FOREST AND WHITE BLUFF...
  VERNONBURG AND SAVANNAH...
  THUNDERBOLT AND SANDFLY...
  SKIDAWAY ISLAND AND RIVERSIDE...

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

LAT...LON 3231 8110 3209 8136 3189 8138 3176 8120
          3200 8085

$$

PY

2 follow-up statements

000 
WGUS72 KCHS 080006
FFSCHS
GAC029-051-SCC053-080030-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
757 PM EDT MON APR 7 2003

...FLASH FLOOD WARNING CONTINUES UNTIL 830 PM FOR 
CHATHAM...JASPER...AND BRYAN COUNTIES...

AT 757 PM...REPORTS FROM THE SAVANNAH FIRE DEPARTMENT AND THE BRYAN 
COUNTY EMERGENCY PERSONNEL...INDICATES FLOODING ONGOING IN PORTIONS 
OF CHATHAM AND SOUTHERN BRYAN COUNTIES.  REPORTS INDICATE WATER OVER 
HIGHWAY 144 NEAR FORT MCALLISTER IN BRYAN COUNTY.  SAVANNAH FIRE 
DEPARTMENT REPORTS FLOODING AROUND MIDTOWN...THE TRUMAN 
PARKWAY...AND SKIDAWAY ISLAND.

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 OR STATEMENTS.

$$

PY

000 
WGUS72 KCHS 080040
FFSCHS
GAC029-051-SCC053-080045-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
837 PM EDT MON APR 7 2003

...FLASH FLOOD WARNING FOR CHATHAM...JASPER...AND BRYAN COUNTIES HAS 
EXPIRED...

AT 837 PM...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR 
CHATHAM...JASPER...AND BRYAN COUNTIES EXPIRED AT 830 PM.  THE LINE OF 
THUNDERSTORMS THAT CREATED FLOODING PROBLEMS AROUND SAVANNAH...AND 
ADJACENT AREAS IN BRYAN AND JASPER COUNTIES...HAS PUSHED OFFSHORE.  
FLOODED AREAS WILL CONTINUE TO SEE IMPROVEMENT OVER THE COMING 
HOURS.  AN ADDITIONAL AREA OF LIGHT RAIN WILL MOVE ACROSS THE AREA 
OVER THE NEXT FEW HOURS...BUT RAINFALL TOTALS WILL AVERAGE LESS THAN 
ONE TENTH OF AN INCH.

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

$$

PY

The office that day

Everything else NWS Charleston, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 7, 9:55 AM EDT	Severe Thunderstorm Warning	CHS	Jenkins	35 min
Apr 7, 4:28 PM EDT	Severe Thunderstorm Warning	CHS	Jasper	32 min

Nearby

Flash Flood Warnings in Georgia, 2003 Flash Flood Warnings in South Carolina, 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; radar from the NEXRAD Level II archive.