Alert archive / Georgia / Flash Flood Warnings in 1992

Flash Flood Warning 7, NWS Jacksonville, FL

September 23, 1992Chatham County, Georgia

NWS Jacksonville, FL issued this flash flood warning at Sep 23, 1992, 10:10 PM EDT for Chatham County, Georgia. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued: Sep 23, 1992, 10:10 PM EDT (02:10 UTC)
Expired: Sep 24, 1992, 12:15 AM EDT
In force: 2 hr
Issued by: NWS Jacksonville, FL
Area: Whole counties

County Chatham County, GA

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 2.2 hours before the alert went out and 145 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: 218 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 540 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 24 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 
TTAA00 KSAV 240213
FFWSAV
GAC051-240415-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAVANNAH GA
1010 PM EDT WED SEP 23 1992
 
THE NATIONAL WEATHER SERVICE IN SAVANNAH HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 1215 AM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHEAST GEORGIA
 
   ...WESTERN CHATHAM COUNTY
 
AT 1007 PM REPORTS OF MAJOR STREET FLOODING AND FLOODING PROBLEMS
WERE REPORTED BY THE POOLER POLICE AND CHATHAM COUNTY SHERIFFS
DEPARTMENT. RADAR ESTIMATES AND SPOTTER REPORTS OF 4.5 TO 5.0
INCHES OF RAIN HAD FALLEN ACROSS POOLER AND OTHER LOCATIONS IN
WESTERN CHATHAM COUNTY IN THE PAST 90 MINUTES.
 
WEATHER SERVICE RADAR IN WAYCROSS INDICATED THAT THE HEAVIEST
RAIN HAD MOVED OUT OF WESTERN CHATHAM COUNTY...BUT MODERATE
TO OCCASIONALLY HEAVY RAIN WAS STILL IN THE AREA. POOLER POLICE
REPORTED VERY HEAVY RAIN STILL FALLING AT 900 PM.
 
THE FLOODING SITUATION SHOULD GRADUALLY IMPROVE ACROSS WESTERN
CHATHAM COUNTY BY 1200 AM AS RAINFALL GRADUALLY BECOMES LIGHTER.
 
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 ESCAPE FLOOD WATEXRS.  DO
NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Sep 23, 6:36 PM EDT, 3 hours 34 minutes before

FLZ008-007-009-240030-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
631 PM EDT WED SEP 23 1992

................SLOW MOVING THUNDERSTORMS IN NORTHEAST FLORIDA........

THUNDERSTORMS WERE DEVELOPING IN NORTHEAST FLORIDA THIS EVENING AND
SHOULD CONTINUE INTO THURSDAY AS A SLOW MOVING COLD FRONT DRIFTS
TOWARDS THE FLORIDA/GEORGIA BORDER TONIGHT. THESE SLOW MOVING
THUNDERSTORMS HAVE ALREADY DEVELOPED EAST AND WEST OF GAINESVILLE AND
EXTEND SOUTHWARD INTO THE FLORDA PENINSULA.

SLOW MOVING THUNDERSTORMS CAN FLOOD LOW LYING AREAS...DRAINAGE DITCHES
AND UNDERPASSES WITH HEAVY RAINFALL. FREQUENT DANGEROUS
LIGHTNING...GUSTY WINDS AND SMALL HAIL ARE ALWAYS POSSIBLE.

L

Nearby

Flash Flood Warnings in Georgia, 1992 Every flash flood warning in 1992

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.