Alert archive / North Carolina / Flash Flood Warnings in 2000

Flash Flood Warning 2, NWS Raleigh, NC

July 23, 2000Alamance County, North Carolina

NWS Raleigh, NC issued this flash flood warning at Jul 23, 2000, 8:37 PM EDT for Alamance 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: Jul 23, 2000, 8:37 PM EDT (00:37 UTC)
Expired: Jul 23, 2000, 11:30 PM EDT
In force: 3 hr
Issued by: NWS Raleigh, NC
Area: Whole counties

County Alamance County, NC

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 0.6 hours before the alert went out and 45 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 399 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 476 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 159 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

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

000 
WGUS52 KRAH 240043
FFWRAH
NCC001-240330-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE RALEIGH NC
837 PM EDT SUN JUL 23 2000

THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A

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

* UNTIL 1130 PM EDT

* AT 835PM EDT NATIONAL WEATHER SERVICE RADAR INDICATED SLOW
  MOVING THUNDERSTORMS WITH VERY HEAVY RAIN OVER CENTRAL
  ALAMANCE COUNTY IN THE VICINITY OF GRAHAM AND INTERSTATE 40.

* THE RALEIGH RADAR ALSO INDICATED THAT AS MUCH AS 2.50 INCHES
  OF RAIN HAS FALLEN IN THE PAST HOUR JUST TO THE SOUTH OF GRAHAM.
  THE RAINFALL TOTALS IN THE PAST 3 HOURS INDICATED AROUND 4 INCHES
  OVER THE SAME AREA. MUCH OF ALAMANCE COUNTY HAS RECEIVED BETWEEN
  1 AND 2 INCHES.

* THE THUNDERSTORMS ARE EXPECTED TO PERSIST OVER THE REGION THROUGH
  1000 PM... WITH A GRADUAL WEAKENING TREND EXPECTED. ADDITIONAL RAINFALL
  OF 1 TO 2 INCHES WILL CAUSE RAPID RISES IN CREEKS AND STREAMS ESPECIALLY
  FROM INTERSTATE 40 FROM BURLINGTON AND GRAHAM SOUTH TO SNOW CAMP
  AND ALONG NC-87 TO SAXAPAHAW.

* RESIDENTS NEAR STREAMS AND CREEKS ARE URGED TO MOVE TO HIGHER
  GROUND. MOTORISTS SHOULD NEVER CROSS A FLOODED ROAD. REMEMBER IT
  IS IMPOSSIBLE TO ESTIMATE THE DEPTH OF THE WATER... ESPECIALLY
  AT NIGHT.

LISTEN TO NOAA WEATHER RADIO OR LOCAL MEDIA FOR THE LATEST
INFORMATION.

BADGETT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 10:28 PM EDT	Flash Flood Warning	RAH	Durham, Orange	3 hr
Jul 23, 11:17 PM EDT	Flash Flood Warning	RAH	Anson	3 hr
Jul 23, 11:32 PM EDT	Flash Flood Warning	RAH	Franklin	3 hr
Jul 24, 1:15 AM EDT	Flash Flood Warning	RAH	Warren	3 hr
Jul 24, 1:41 AM EDT	Flash Flood Warning	RAH	Durham, Orange	3 hr
Jul 24, 4:08 AM EDT	Flash Flood Warning	RAH	Halifax	112 min
Jul 24, 7:22 AM EDT	Flash Flood Warning	RAH	Franklin, Halifax, Nash, Warren	2 hr

Nearby

Flash Flood Warnings in North Carolina, 2000 Every 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.