Alert archive / North Carolina / Flash Flood Warnings in 2000

Flash Flood Warning 32, NWS Raleigh, NC

September 1, 2000Guilford County, North Carolina

NWS Raleigh, NC issued this flash flood warning at Sep 1, 2000, 8:30 PM EDT for Guilford County, North Carolina. It was in force for 90 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 1, 2000, 8:30 PM EDT (00:30 UTC)
Expired
Sep 1, 2000, 10:00 PM EDT
In force
90 min
Issued by
NWS Raleigh, NC
Area
Whole counties

County Guilford County, NC

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 0.5 hours before the alert went out and 10 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 2000-09-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 326 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 2000-09-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 55 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
326 J/kg
Mixed-layer CIN
-56 J/kg
Mixed-layer LCL
948 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
55 m²/s²
0-3 km storm-relative helicity
68 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 
WGUS52 KRAH 020031
FFWRAH
NCC081-020200-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE RALEIGH NC
830 PM EDT FRI SEP 1 2000

THE NATIONAL WEATHER SERVICE IN RALEIGH HAS EXTENDED A

* FLASH FLOOD WARNING FOR...
  GUILFORD COUNTY IN NORTH CAROLINA

* UNTIL 1000 PM EDT

* AT 830 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WITH VERY HEAVY RAIN MOVING FROM RANDOLPH COUNTY INTO
CENTRAL AND EASTERN GUILFORD COUNTY.

* THESE SLOW MOVING THUNDERSTORMS ARE PRODUCING TORRENTIAL RAINFALL
ON OVER ONE INCH PER HOUR OVER PORTIONS OF CENTRAL AND EASTERN
GUILFORD COUNTY.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.

ABSOLUTELY DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER
COVERS THE ROADWAY. VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED. MOVE TO HIGHER GROUND.

RFG

The office that day

Everything else NWS Raleigh, NC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 1, 8:23 PM EDTFlash Flood WarningRAHRandolph97 min
Sep 2, 12:15 PM EDTFlash Flood WarningRAHStanly3 hr
Sep 2, 2:30 PM EDTFlash Flood WarningRAHScotland3 hr
Sep 2, 3:10 PM EDTFlash Flood WarningRAHStanly2 hr

Nearby

Flash Flood Warnings in North Carolina, 2000Every flash flood warning in 2000

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.