Alert archive / North Carolina / Flash Flood Warnings in 1993

Flash Flood Warning 4, NWS Greenville-Spartanburg, SC

March 23, 1993Ashe County, Watauga County, North Carolina

NWS Greenville-Spartanburg, SC issued this flash flood warning at Mar 23, 1993, 3:48 PM EST for Ashe County, Watauga County, North Carolina. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Mar 23, 1993, 3:48 PM EST (20:48 UTC)
Expired
Mar 23, 1993, 7:45 PM EST
In force
4 hr
Issued by
NWS Greenville-Spartanburg, SC
Area
Whole counties

Counties Ashe County, NC, Watauga County, NC

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 8.8 hours before the alert went out and 155 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 12:00Z on 1993-03-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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 12:00Z on 1993-03-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 169 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
622 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
169 m²/s²
0-3 km storm-relative helicity
202 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 KAVL 232050
FFWAVL
NCC009-189-240045-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ASHEVILLE NC
348 PM EST TUE MAR 23 1993
 
THE NATIONAL WEATHER SERVICE IN ASHEVILLE HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  745 PM EST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN WEST NORTH CAROLINA
 
   ...ASHE COUNTY...WATAUGA COUNTY
 
IN WATAUGA COUNTY...EMERGENCY MANAGEMENT REPORTS ELEVEN ROADS CLOSED DUE
TO FLOODING FROM BOTH THE WATAUGA AND NEW RIVERS. AT THE SOUTH FORK OF
THE NEW RIVER NEAR BOONE...WATER WAS ONE FOOT BELOW FLOOD STAGE. A
NUMBER OF LOW WATER BRIDGES ARE UNDER WATER IN THE COUNTY AS WELL.
MODERATE TO HEAVY RAIN...COUPLED WITH SNOWMELT WILL CAUSE WATERS
TO CONTINUE TO RISE.
 
IN ASHE COUNTY...EMERGENCY MANAGEMENT REPORTED SEVERAL ROADS CLOSED.
THESE ROADS WERE ALONG BOTH THE NORTH AND SOUTH FORKS OF THE NEW RIVER.
THEY ALSO REPORTED MANY LOW WATER BRIDGES UNDER WATER. RAIN CONTINUED
OVER THE COUNTY.
 
PEOPLE IN BOTH WATAUGA AND ASHE COUNTIES SHOULD REMAIN ESPECIALLY
ALERT...BE READY TO MOVE TO HIGHER GROUND IMMEDIATELY IF FLOOD WATERS
THREATEN. STAY TUNED TO NOAA WEATHER RADIO OR LOCAL RADIO AND TELEVISION
FOR OFFICIAL INFORMATION FROM THE NATIONAL WEATHER SERVICE OR LOCAL
EMERGENCY MANAGEMENT OFFICES.
 
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 WATER<S.  DO
NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
 
R. JONES/AVL

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, Mar 23, 3:33 PM EST, 15 minutes before
NCZ010-011-012-232130-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ASHEVILLE NC
333 PM EST TUE MAR 23 1993

...STRONG THUNDERSTORMS APPROACHING WESTERN NORTH CAROLINA...

AT 330 PM EST...WEATHER SERVICE RADAR SHOWED A LINE OF THUNDERSTORMS
EXTENDING THROUGH NORTHERN GEORGIA AND INTO THE SOUTHWESTERN MOUNTAINS
OF NORTH CAROLINA. THE STRONGEST THUNDERSTORMS WERE OVER NORTHERN
GEORGIA BUT WERE MOVING TO THE NORTHEAST AT 35 MPH. WITH THIS MOVEMENT
THE STRONGEST STORMS WILL MOVE INTO MACON AND JACKSON COUNTIES BY 4 PM.

THESE THUNDERSTORMS WERE PRODUCING VERY HEAVY RAIN AND FREQUENT DEADLY
LIGHTNING. STRONG GUSTY WINDS AND SOME HAIL ARE ALSO POSSIBLE WITH THE
STRONGEST STORMS.

IF THREATENING WEATHER APPROACHES YOUR AREA...MOVE INTO A STRONG
BUILDING AND REMAIN THERE UNTIL THE STORM HAS PASSED.

LISTEN TO NOAA WEATHER RADIO...OR LOCAL RADIO AND TELEVISION FOR LATER
INFORMATION.

EJC

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 23, 12:09 PM ESTFlash Flood WarningGSPWatauga2 hr
Mar 23, 1:20 PM ESTFlash Flood WarningGSPHenderson115 min
Mar 23, 2:02 PM ESTFlash Flood WarningGSPAshe, Watauga118 min
Mar 23, 3:57 PM ESTFlash Flood WarningGSPMcDowell2 hr
Mar 23, 4:54 PM ESTFlash Flood WarningGSPHaywood, Henderson, Transylvania4 hr
Mar 23, 4:54 PM ESTFlash Flood WarningGSPCaldwell4 hr

Nearby

Flash Flood Warnings in North Carolina, 1993Every flash flood warning in 1993

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.