Alert archive / North Carolina / Flash Flood Warnings in 1990

Flash Flood Warning 24, NWS Greenville-Spartanburg, SC

August 9, 1990Cherokee County, North Carolina

NWS Greenville-Spartanburg, SC issued this flash flood warning at Aug 9, 1990, 4:20 PM EDT for Cherokee County, North Carolina. It was in force for 55 min.

The area

The counties it named.

The facts

Issued
Aug 9, 1990, 4:20 PM EDT (20:20 UTC)
Expired
Aug 9, 1990, 5:15 PM EDT
In force
55 min
Issued by
NWS Greenville-Spartanburg, SC
Area
Whole counties

County Cherokee County, NC

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 12:00Z, 8.3 hours before the alert went out and 149 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 12:00Z on 1990-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 561 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, Athens Municipal, GA at 12:00Z on 1990-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 11 square meters per square second.193958Sfc1 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
561 J/kg
Mixed-layer CIN
-40 J/kg
Mixed-layer LCL
658 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
11 m²/s²
0-3 km storm-relative helicity
87 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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, Aug 9, 3:25 PM EDT, 55 minutes before
NCZ-010-011-092110-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ASHEVILLE NC
325 PM EDT THU  AUG 9  1990

...SHOWERS AND THUNDERSTORMS DEVELOPING OVER THE MOUNTAINS OF WESTERN
NORTH CAROLINA...                                                              AAT 320 PM WEATHER SERVICE RADAR SHOWED SHOWERS AND THUNDERSTORMS ALONG
THE NORTH CAROLINA TENNESSEE BORDER FROM HOT SPRINGS TO MURPHY.  THE
HEAVIEST STORMS WERE IN GRAHAM AND CHEROKEE COUNTIES BETWEEN
ROBBINSVILLE AND MURPHY.  THEY WERE MOVING SLOWLY NORTHEAST.

THERE IS A POTENTIAL FOR VERY STRONG THUNDERSTORMS IN WESTERN NORTH
CAOLINA THIS AFTERNOON THAT COULD PRODUCE STRONG GUSTY WINDS..DANGEROUS
LIGHTNING AND HEAVY RAIN.  BECAUSE OF THE SLOW MOVEMENT OF THE STORMS
THE HEAVY RAIN COULD CAUSE SOME MINOR FLOODING.

PERSONS ALONG SMALL STREAMS OR IN AREAS SUBJECT TO FLASH FLOODING SHOULD
REMAIN ALERT DURING PERIODS OF HEAVY RAIN THIS AFTERNOON.  BE PREPARED
TO MOVE TO HIGHER @GROUND IF FLOODING SHOULD DEVELOP.

IF YOU SEE LIGHTNING OR HEAR THUNDER..MOVE INSIDE A STRONG BUILDING
UNTIL THE STORM HAS PASSED.
HM

The office that day

Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 9, 4:20 PM EDTSevere Thunderstorm WarningGSPCherokee55 min

Nearby

Flash Flood Warnings in North 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.