Alert archive / South Carolina / Flash Flood Warnings in 1990

Flash Flood Warning 31, NWS Greenville-Spartanburg, SC

September 13, 1990Oconee County, South Carolina

NWS Greenville-Spartanburg, SC issued this flash flood warning at Sep 13, 1990, 7:03 AM EDT for Oconee County, South Carolina. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Sep 13, 1990, 7:03 AM EDT (11:03 UTC)
Expired
Sep 13, 1990, 10:00 AM EDT
In force
3 hr
Issued by
NWS Greenville-Spartanburg, SC
Area
Whole counties

County Oconee County, SC

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Athens Municipal, GA (KAHN), launched 00:00Z, 11.1 hours before the alert went out and 92 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, Athens Municipal, GA at 00:00Z on 1990-09-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Athens Municipal, GA at 00:00Z on 1990-09-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 39 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
NaN m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
39 m²/s²
0-3 km storm-relative helicity
82 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 KGSP 131104
FFWGSP
SCC073-131400-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GREENVILLE SPARTANBURG SC
703 AM EDT THU SEP 13 1990
 
THE NATIONAL WEATHER SERVICE IN GREENVILLE SPARTANBURG HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 1000 AM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN  SOUTH CAROLINA
 
   ...SOUTHERN OCONEE COUNTY
 
WEATHER RADAR INDICATES THAT NEAR 3 INCHES OF RAIN HAVE FALLEN
OVER SOUTHERN OCONEE COUNTY DURING THE PAST 3 HOURS. THE OCONEE
COUNTY SHERIFFS DEPARTMENT REPORTS FLOODING IS OCCURRING ON MANY
ROADS...STREETS...AND STREAMS. THUNDERSTORMS SHOULD CONTINUE TO
BRING HEAVY RAINFALL TO THE SOUTHERN OCONEE COUNTY AREA AND
FLOODING IS APT TO CONTINUE UNTIL LATER THIS MORNING. THESE
STORMS WERE MOVING NORTHEAT AT ABOUT 15 MPH.
 
 
 
LOWLAND AREAS SUBJECT TO FLOODING SHOULD BE EVACUATED. PEOPLE
IN AREAS THAT ARE PRONE TO FLOODING SHOULD BE ALERT FOR RAPIDLY
RISING WATER...AND GO TO HIGHER GROUND IMMEDIATELY.
 
AVOID ALREADY FLOODED AREAS. TRAVELERS SHOULD NOT ATTEMPT TO CROSS
FLOODED ROADS. IF YOUR VEHICLE STALLS...LEAVE IT AND MOVE
IMMEDIATELY TO HIGHER GROUND.

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 13, 6:32 AM EDT, 31 minutes before
SCZ001-002-131110-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE SPARTANBURG SC
630 AM EDT THU SEP 13 1990

...THUNDERSTORMS WITH VERY HEAVY OVER UPSTATE SOUTH CAROLINA...

AT 625 AM EDT WEATHER RADAR INDICATED THUNDERSTORMS SOME WITH VERY
HEAVY RAINFALL OVER OCONEE AND SOUTHERN PICKENS COUNTIES. THE HEAVIEST
RAINFALL WAS BETWEEN WALHALLA AND FAIR PLAY IN OCONEE COUNTY AND
BETWEEN PICKENS AND CLEMSON IN PICKENS COUNTY. THESE STORMS WERE
MOVING NORTHEAST AT 15 MPH.

AT 625 AM OCONEE COUNTY SHERIFFS DEPARTMENT REPORTED SMALL STREAMS
AND SOME STREETS WERE FLOODING IN CENTRAL AND SOUTHERN OCONEE COUNTY.

OTHER THUNDERSTORMS OVER NORTHEAST GEORGIA SHOULD BE MOVING INTO
OCONEE AND PICKENS COUNTIES DURING THE NEXT FEW HOURS. IF RAINFALL
CONTINUES TO BE HEAVY A FLASH FLOOD WARNING MAY BE NEEDED. PEOPLE
SHOULD BE ALERT AND TAKE ACTION IF WATER BEGINS TO RISE.
INTENSE LIGHTNING HAS ALSO BEEN REPORTED IN THESE AREAS WITH THESE
STORMS.
ROBBINS

Nearby

Flash Flood Warnings in South Carolina, 1990Every flash flood warning in 1990

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.