Alert archive / North Carolina / Flash Flood Warnings in 2001

Flash Flood Warning 29, NWS Raleigh, NC

August 30, 2001Chatham County, North Carolina

NWS Raleigh, NC issued this flash flood warning at Aug 30, 2001, 10:54 PM EDT for Chatham County, North 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
Aug 30, 2001, 10:54 PM EDT (02:54 UTC)
Expired
Aug 31, 2001, 2:00 AM EDT
In force
3 hr
Issued by
NWS Raleigh, NC
Area
Whole counties

County Chatham County, NC

The radar

The Raleigh/Durham radar (KRAX), 69 km from the middle of the area, began a volume at 02:54 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, 2.9 hours before the alert went out and 72 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 2001-08-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 951 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 2001-08-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 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
951 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
800 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
46 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 310257
FFWRAH
NCC037-310600-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE RALEIGH NC
1054 PM EDT THU AUG 30 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

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

* UNTIL 200 AM EDT

* AT 1054 PM EDT RADAR INDICATED SLOW MOVING THUNDERSTORMS CONTINUED
  TO MOVE OVER CENTRAL AND EASTERN SECTIONS OF CHATHAM COUNTY.

* SLOW MOVING THUNDERSTORMS ARE PRODUCING HEAVY RAINFALL IN THE      
  WARNED AREA. FLOODING HAS CLOSED SEVERAL ROADS INCLUDING AUSTINS  
  CHAPEL ROAD AND HANKS CHAPEL ROAD ABOUT 5 MILES SOUTHWEST 
  OF PITTSBORO 

DO NOT DRIVE THROUGH FLOOD WATERS OF UNKNOWN DEPTH. FLOOD WATERS
ARE IMPOSSIBLE TO SEE AT NIGHT. TURN AROUND AND FIND ANOTHER ROUTE.

$$

PWB/RFG

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 31, 7:15 PM EDTSevere Thunderstorm WarningRAHSampson30 min

Nearby

Flash Flood Warnings in North Carolina, 2001Every flash flood warning in 2001

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.