Alert archive / North Carolina / Flash Flood Warnings in 2003

Flash Flood Warning 28, NWS Raleigh, NC

July 6, 2003Forsyth County, North Carolina

NWS Raleigh, NC issued this flash flood warning at Jul 6, 2003, 9:00 PM EDT for Forsyth County, North Carolina. It was in force for 75 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
Jul 6, 2003, 9:00 PM EDT (01:00 UTC)
Expired
Jul 6, 2003, 10:15 PM EDT
In force
75 min
Issued by
NWS Raleigh, NC
Area
Whole counties

County Forsyth County, NC

The radar

The Roanoke radar (KFCX), 99 km from the middle of the area, began a volume at 01:02 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

Roanoke, VA (KRNK), launched 00:00Z, 1.0 hours before the alert went out and 137 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, Roanoke, VA at 00:00Z on 2003-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 57 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Roanoke, VA at 00:00Z on 2003-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 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
57 J/kg
Mixed-layer CIN
-142 J/kg
Mixed-layer LCL
1097 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
4 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 070100
FFWRAH
NCC067-070300-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE RALEIGH NC
900 PM EDT SUN JUL 6 2003

THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  FORSYTH COUNTY IN CENTRAL NORTH CAROLINA

* UNTIL 1100 PM EDT

* AT 900 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY
  HEAVY RAIN OVER THE WESTERN FORSYTH COUNTY. RAINFALL RANGING
  BETWEEN 2 AND 3 INCHES HAVE FALLEN OVER THIS AREA SINCE 500 PM.    
  THIS ADDITIONAL RAIN WILL LIKELY CAUSE FLOODING ON MUDDY AND MILL  
  CREEKS IN WESTERN FORSYTH COUNTY. URBAN FLOODING WILL BE LIKELY IN 
  WINSTON SALEM...PHAFFTOWN...LEWISVILLE...AND CLEMMONS AS WELL.

SMALL CREEKS AND STREAMS WILL RAPIDLY FLOOD...POSSIBLY WASHING OUT
ROADS AND FLOODING NEARBY LOW AREAS.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS.

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.

$$

LAT...LON 3604 8046 3598 8036 3602 8006 3617 8003
          3619 8044

13
1 follow-up statement
000 
WGUS72 KRAH 070233
FFSRAH
NCC057-067-070300-

FLASH FLOOD STATEMENT...CORRECTED
NATIONAL WEATHER SERVICE RALEIGH NC
1025 PM EDT SUN JUL 6 2003

...THE FLASH FLOOD WARNING FOR DAVIDSON COUNTY EXPIRED AT 1015 PM...
...THE FLASH FLOOD WARNING FOR FORSYTH COUNTY HAS BEEN CANCELLED...

HEAVY SHOWERS HAVE MOVED OUT OF DAVIDSON AND FORSYTH COUNTIES AND 
WARNINGS WILL NO LONGER BE NEEDED. LINGERING SHOWERS WILL MOVE 
THROUGH THE AREA THROUGH MIDNIGHT...BUT ADDITIONAL RAINFALL WILL BE 
LIGHT...ON THE ORDER OF A QUARTER OF AN INCH OR LESS.

RADAR ESTIMATES THAT UP TO 3 INCHES OF RAIN FELL OVER THESE AREAS 
THIS EVENING. DRIVERS SHOULD BE ALERT FOR LINGERING WATER ON THE 
ROADS...WHICH WILL BE A POSSIBILITY OVERNIGHT. 

$$

CORRECTED PRODUCT HEADER

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 8:21 PM EDTFlash Flood WarningRAHDavidson114 min

Nearby

Flash Flood Warnings in North Carolina, 2003Every flash flood warning in 2003

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.