Alert archive / South Carolina / Flash Flood Warnings in 1998

Flash Flood Warning 55, NWS Greenville-Spartanburg, SC

May 29, 1998Cherokee County, Union County, South Carolina

NWS Greenville-Spartanburg, SC issued this flash flood warning at May 29, 1998, 6:19 AM EDT for Cherokee County, Union County, South Carolina. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 29, 1998, 6:19 AM EDT (10:19 UTC)
Expired
May 29, 1998, 9:20 AM EDT
In force
3 hr
Issued by
NWS Greenville-Spartanburg, SC
Area
Whole counties

Counties Cherokee County, SC, Union County, SC

The radar

The Greer radar (KGSP), 55 km from the middle of the area, began a volume at 10:22 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

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 10.3 hours before the alert went out and 206 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, Greensboro/Hi Pt, NC at 00:00Z on 1998-05-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 811 joules per kilogram.LCLLFCEL10008507005003002001001 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, Greensboro/Hi Pt, NC at 00:00Z on 1998-05-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 11 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
811 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
813 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
11 m²/s²
0-3 km storm-relative helicity
58 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 291019
FFWGSP
SCC021-087-291320-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
619 AM EDT FRI MAY 29 1998

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CHEROKEE COUNTY IN SOUTH CAROLINA
  UNION COUNTY IN SOUTH CAROLINA

* UNTIL 920 AM EDT

* AT 615 AM... NATIONAL WEATHER SERVICE RADAR INDICATED
  THUNDERSTORMS WITH VERY HEAVY RAIN ACROSS CHEROKEE COUNTY TO
  JUST EAST OF UNION....MOVING SLOWLY EAST-NORTHEAST.

* DOPPLER RADAR ESTIMATES THAT UPWARDS OF 2 INCHES OF RAIN HAS
  FALLEN ACROSS CHEROKEE AND EASTERN UNION COUNTY SINCE ABOUT
  5 AM AND CHEROKEE COUNTY COMMS REPORTS SOME FLOODING BEGINNING
  TO DEVELOP ON AREA ROADS.  ADDITIONAL RAINFALL IN EXCESS OF TWO
  INCHES IS LIKELY ACROSS THE WARNED AREA THROUGH 745 AM.

KEEP AN EYE ON THE WEATHER AND STREAM CONDITIONS.  PEOPLE ALONG
STREAMS SHOULD BE READY FOR FLOODING BY MOVINLG TO HIGHER GROUND NOW.

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.

NWS Greenville-Spartanburg, SC wrote its last area forecast discussion before this flash flood warning went out at May 29, 1:58 AM EDT, 4 hours 21 minutes earlier.

Area forecast discussion, May 29, 1:58 AM EDT, 4 hours 21 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
158 AM EDT FRI MAY 29 1998

CAE: LOOKS LIKE WE CAN PUT THE 20% POP BACK IN FOR TDY FOR MTNS
      AND FTHLS...WITH SLT CHC POPS ALL AREAS FOR TONIGHT & SATURDAY.
RAH: 20% POPS EACH PERIOD MTNS & FTLHS...ISOLATED TO 20% PIEDMONT.
FFC: ADD SLT CHC POPS FOR EACH PERIOD.

UPSLOPE FLOW LIFTING RATHER JUICY AIRMASS CONTINUES TO REDEVELOP
ISOLATED CONVECTION ACRS THE MTNS & FTHLS EARLY THIS MORNING...
ALTHOUGH WOULD EXPECT THIS TREND TO DIMINISH TOWARDS DIURNAL
MINIMUM LATER THIS AM.  WE HAD ABOUT 10-20% CVRG ACRS THESE AREAS
SINCE LATE YSTDY & GIVEN A SIMILAR AIRMASS & SYNOPTIC FEATURES
TDY & TONITE...EXPECT A SIMILAR CVRG DUE TO DIFFERENTIAL HTG IN
THE MTNS & PROBABLY ALONG SOME MESO BNDRYS FROM PREVIOUS CONVECTION
...NOT TO MENTION DEVELOPING LEE SIDE TROF ACRS THE PIEDMONT.

HEIGHTS WILL LOWER SOME ACRS THE FA ON SATURDAY IN RESPONSE TO
NORTHERN STRM S/WV MOVING THRU OHIO VALLEY LATE IN THE DAY.  ETA
GRIDS SHOW ASSOCIATED MID-LVL COOL POOL APPROACHING NW SXNS BY
48 HRS & T/H X-SXNS SHOW INCREASING OMEGA AS WELL.  ATTM...FEEL
ANY INCREASE IN PCPN DUE TO THESE FEATURES WILL BE AFTER THE
IMMEDIATE FCST PERIOD...SO NET RESULT DURING THE SATURDAY
TIMEFRAME WILL BE JUST A SLIGHT INCREASE IN DIURNALLY FIRED TSTM
CVRG.

AVL  84/63/84  222
CLT  89/69/90  122
GSP  88/68/89  222

CSH

Nearby

Flash Flood Warnings in South Carolina, 1998Every flash flood warning in 1998

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.