Alert archive / North Carolina / Flash Flood Warnings in 2004

Flash Flood Warning 49, NWS Greenville-Spartanburg, SC

August 12, 2004Iredell County, North Carolina

NWS Greenville-Spartanburg, SC issued this flash flood warning at Aug 12, 2004, 2:33 PM EDT for Iredell 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 outline as issued.

The facts

Issued
Aug 12, 2004, 2:33 PM EDT (18:33 UTC)
Expired
Aug 12, 2004, 5:30 PM EDT
In force
3 hr
Issued by
NWS Greenville-Spartanburg, SC
Area
Counties, with a storm outline in the text

County Iredell County, NC

The radar

The Roanoke radar (KFCX), 150 km from the middle of the area, began a volume at 18:34 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 12:00Z, 6.6 hours before the alert went out and 96 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 2004-08-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 634 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 2004-08-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 47 square meters per square second.19395878Sfc1 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
634 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
701 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
47 m²/s²
0-3 km storm-relative helicity
66 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS52 KGSP 121834
FFWGSP
NCC097-122130-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
233 PM EDT THU AUG 12 2004

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  IREDELL COUNTY IN THE PIEDMONT OF NORTH CAROLINA

* UNTIL 530 PM EDT

* AT 225 PM EDT...VERY HEAVY RAIN WAS REPORTED FROM A THUNDERSTORM
  NEAR STATESVILLE...MOVING NORTHEAST AT 15 MPH. ADDITIONAL          
  THUNDERSTORMS WITH HEAVY RAIN WERE TO THE SOUTHWEST OF THIS 
  AREA...AND ADDITIONAL HEAVY RAIN IS LIKELY. AN AUTOMATED GAGE IN 
  STATESVILLE HAS REPORTED 2.75 INCHES OF RAIN IN THE PAST THREE 
  HOURS...AND AN ADDITIONAL INCH OR MORE OF RAIN IS POSSIBLE WITH THE 
  ADDITIONAL STORMS.

* THE IREDELL COUNTY COMMUNICATIONS CENTER REPORTED THAT SEVERAL ROADS
  IN THE STATESVILLE AREA WERE PARTIALLY COVERED WITH WATER...MOSTLY
  THE RESULT OF BACKED UP CULVERTS IN POOR DRAINAGE AREAS. HOWEVER...
  AS THE HEAVY RAIN CONTINUES...URBAN FLOODING WILL BECOME MORE
  SEVERE AND STREAMS WILL BEGIN TO LEAVE THEIR BANKS.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS AND STREAMS AND OTHER
LOW LYING AREAS ARE SUBJECT TO FLASH FLOODING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND. EVEN MODERN SPORT UTILITY VEHICLES CANNOT BE
SAFELY DRIVEN THROUGH FLOOD WATERS.

LAT...LON 3559 8093 3558 8077 3603 8070 3606 8099
      3579 8109

$$

MCAVOY
2 follow-up statements
000 
WGUS72 KGSP 121937
FFSGSP
NCC097-122130-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
337 PM EDT THU AUG 12 2004

...A FLASH FLOOD WARNING CONTINUES UNTIL 530 PM EDT FOR IREDELL
COUNTY...

AT 330 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
SHOWERS PRODUCING HEAVY RAIN OVER THE SOUTHERN HALF OF IREDELL 
COUNTY. WHILE THE AREAL COVERAGE OF HEAVY RAIN HAS DECREASED... 
LOCALLY UP TO AN ADDITIONAL INCH OF RAIN COULD FALL. 

AS OF 325 PM EDT...THE COUNTY COMMUNICATIONS CENTER REPORTED NO NEW 
AREAS OF FLOODING...THOUGH WATER REMAINED HIGH IN PARTS OF THE 
STATESVILLE METRO AREA.

URBAN FLOODING IS STILL LIKELY IN STATESVILLE...AND WATER WILL 
LIKELY IMPACT TRAFFIC ALONG WALLACE SPRINGS ROAD EAST TO HIGHWAY 21. 
IN ADDITION...SIGNIFICANT RISES ON THE THIRD... FOURTH... FIFTH AND 
GREGORY CREEKS CAN BE EXPECTED AND SOME OF THESE CREEKS MAY 
COME OUT OF THEIR BANKS.

LAT...LON 3559 8093 3558 8077 3603 8070 3606 8099
      3579 8109

$$

MCAVOY
000 
WGUS72 KGSP 122037
FFSGSP
NCC097-122130-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
435 PM EDT THU AUG 12 2004

...THE FLASH FLOOD WARNING FOR IREDELL COUNTY HAS BEEN CANCELLED...

AT 430 PM EDT...THE COUNTY COMMUNICATIONS CENTER REPORTED THAT THERE 
WERE NO KNOWN FLOODING PROBLEMS IN THE COUNTY. AS ALL BUT VERY LIGHT 
RAINFALL HAS ENDED OVER THE COUNTY...THE WARNING HAS BEEN CANCELLED.

LAT...LON 3559 8093 3558 8077 3603 8070 3606 8099
      3579 8109

$$
MCAVOY

Nearby

Flash Flood Warnings in North Carolina, 2004Every flash flood warning in 2004

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.