Alert archive / North Carolina / Flash Flood Warnings in 1989

Flash Flood Warning 2, NWS Raleigh, NC

April 30, 1989Wake County, North Carolina

NWS Raleigh, NC issued this flash flood warning at Apr 30, 1989, 8:30 PM EDT for Wake County, North Carolina. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Apr 30, 1989, 8:30 PM EDT (00:30 UTC)
Expired
Apr 30, 1989, 10:30 PM EDT
In force
2 hr
Issued by
NWS Raleigh, NC
Area
Whole counties

County Wake County, NC

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 0.5 hours before the alert went out and 117 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 1989-05-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1989-05-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -36 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
NaN m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
-36 m²/s²
0-3 km storm-relative helicity
-29 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 
TTAA00 KRDU 010032
FFWRDU
NCC183-010230-
 
BULLETIN - EBS ACTIVATION REQUESTED
SMALL STREAM AND URBAN FLOOD WARNING
NATIONAL WEATHER SERVICE RALEIGH NC
830 PM EDT SUN APR 30 1989
 
THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A
SMALL STREAM AND URBAN FLOOD WARNING EFFECTIVE UNTIL 1030 PM EDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN NORTH CENTRAL NORTH CAROLINA
          ...WAKE
 
RAIN AND SCATTERED THUNDERSTORMS DURING THE AFTERNOON AND EVENING
RESULTED IN RAINFALL TOTALS APPROACHING THREE INCHES IN SOME SECTIONS
OF WAKE COUNTY. MINOR FLOODING OF STREETS AND HIGHWAYS HAS BEEN
REPORTED FROM EASTERN WAKE COUNTY AND IN THE CITY OF RALEIGH.
 
AT 830 PM...NATIONAL WEATHER SERVICE RADAR SHOWED A LARGE AREA OF RAIN
MOVING NORTHWARD INTO WAKE COUNTY. LOCALLY HEAVY RAIN FALLING IN THOSE
LOCATIONS THAT EXPERIENCED SUBSTANTIAL RAINFALL EARLIER...WILL HAVE
CONTINUED FLOODING OF STREETS AND HIGHWAYS. RAPID RISES OF WATER
LEVELS IN CREEKS AND STREAMS WILL ALSO OCCUR.
 
PERIODS OF MODERATE TO HEAVY RAIN WILL AFFECT WAKE COUNTY UNTIL AT
LEAST 10 PM.
 
 
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.

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Apr 30, 5:05 PM EDT, 3 hours 25 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENSBORO NC
500 PM EDT SUN APR 30 1989

...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 900 PM EDT FOR THE
   NORTHWEST PIEDMONT COUNTIES OF DAVIDSON..ROWAN..DAVIE..IREDELL
   AND RANDOLPH...

AT 450 PM RADAR SHOWS SCATTERED THUNDERSTORMS...SOME WITH VERY HEAVY
DOWNPOURS AND GUSTY WINDS...EXTENDED FROM THE RALEIGH AREA TO THE
SOUTHERN PIEDMONT. THE STORM MOVEMENT WAS TO THE NORTHEAST AT 20 MILES
AN HOUR. IN THE PAST HOUR THE AREAL MOVEMENT APPEARED TO BE MOVING OR
BUILDING TOWARDS THE NORTH.

THE ONLY PART OF THE AREA OF STORMS CURRENTLY OVER THE NORTHWEST PIEDMONT
IS IN EASTERN RANDOLPH AND SOUTHERN DAVIDSON COUNTIES AND THESE STORMS
CONTAIN ONLY ISOLATED HEAVY RAIN AND POSSIBLY SOME GUSTY WINDS.

PERSONS IN THE SOUTHERN PART OF THE NORTHWEST PIEDMONT SHOULD BE ON
THE LOOKOUT FOR THREATNING WEATHER AND TAKE SHELTER IF STORMS APPROACH
OR DEVELOPE.

THE NEXT STATEMENT WILL BE ISSUED AROUND 6 PM OR EARLIER IF
CONDITIONS WARRANT.

GR
Special weather statement, Apr 30, 6:00 PM EDT, 2 hours 30 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH/DURHAM, NC
600 PM EDT SUN APR 30 1989

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 900 PM THIS EVENING
FOR SOUTH CENTRAL AND MOST OF EASTERN NORTH CAROLINA...

AT 550 PM...WEATHER RADAR SHOWED SHOWERS AND THUNDERSTORMS FROM THE
SANDHILLS NORTHEAST INTO THE TRIANGLE AREA AND THE CENTRAL AND NORTHERN
COASTAL PLAIN. THE HEAVIEST STORMS WERE IN THE SANDHILLS FROM RICHMOND
COUNTY ACROSS HOKE AND NORTHERN CUMBERLAND COUNTY. OTHER STRONG STORMS
EXTENDED FROM EASTERN WAKE COUNTY EAST INTO NORTHERN WILSON...SOUTHERN
EDGECOMBE AND NORTHERN PITT COUNTIES.

THESE STORMS HAVE BEEN DRIFTING SLOWLY TOWARD THE NORTH AROUND 15
MPH. THESE STORMS WILL PRODUCE LOCALLY HEAVY RAINS AND BECAUSE OF
THEIR SLOW MOVEMENT...HIGHWAY AND LOWLAND FLOODING IS POSSIBLE.

COUNTY EMERGENCY COMMUNICATIONS UNITS AND HAM RADIO OPERATORS IN
RICHMOND...MOORE...WAKE AND WILSON COUNTIES HAVE REPORTED TORRENTIAL
RAINS. PEA SIZE HAIL HAS BEEN REPORTED SINCE 500PM IN SOUTHERN
WILSON COUNTY AND EASTERN WAKE COUNTY. MARBLE SIZE HAIL WAS REPORTED
IN EASTERN CUMBERLAND COUNTY AT 550 PM.

TAKE SHELTER AS THE STORMS APPROACH...THEY WILL BE ACCOMPANIED BY
LOCALLY TORRENTIAL RAINS...HAIL AND POSSIBLY STRONG GUSTY WINDS.

LISTEN TO LOCAL RADIO...TELEVISION OR WEATHER RADIO FOR LATER
STATEMENTS AND POSSIBLE WARNINGS.

HLW
Special weather statement, Apr 30, 6:01 PM EDT, 2 hours 29 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENSBORO NC
600 PM EDT SUN APR 30 1989

...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 900 PM EDT FOR THE
   NORTHWEST PIEDMONT COUNTIES OF DAVIDSON..ROWAN..DAVIE..IREDELL
   AND RANDOLPH...

AT 555 PM RADAR SHOWS SCATTERED THUNDERSTORMS...SOME WITH VERY HEAVY
DOWNPOURS AND GUSTY WINDS...EXTENDED FROM THE FAYETTEVILLE AREA TO
NORTHERN SOUTH CAROLINA. OTHER SHOWERS AND THUNDERSTORMS OF LESSER
INTENSITY WERE WIDELY SCATTERED OVER ROWAN AND SOUTHERN DAVIDSON
COUNTIES OF THE NORTHWEST PIEDMONT AND OVER THE NORTHERN FOOTHILLS.
MOVEMENT WAS TO THE NORTHEAST AT 20 MILES AN HOUR WHILE THE AREAL
MOVEMENT WAS SLOWLY TO THE NORTH.

THE STRONGEST STORM WAS JUST TO THE SOUTHEAST OF SALISBURY IN ROWAN
COUNTY WITH ONLY HEAVY RAIN AND POSSIBLY SOME GUSTY WINDS.

PERSONS IN THE SOUTHERN PART OF THE NORTHWEST PIEDMONT SHOULD BE ON
THE LOOKOUT FOR THREATNING WEATHER AND TAKE SHELTER IF STORMS
APPROACH OR DEVELOPE.

OTHER STATEMENTS WILL BE ISSUED IF CONDITIONS WARRANT.

GR
Special weather statement, Apr 30, 7:39 PM EDT, 51 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH/DURHAM, NC
738 PM EDT SUN APR 30 1989

SEVERE THUNDERSTORM WATCH NUMBER 146 WHICH COVERED MUCH OF CENTRAL AND
EASTERN NORTH CAROLINA IS NO LONGER IN EFFECT. ALSO...THE PORTION OF
SEVERE THUNDERSTORM WATCH WHICH INLUDED A SMALL PART OF CENTRAL NORTH
CAROLINA HAS BEEN CANCELLED. THERE ARE NO SEVERE THUNDERSTORM WATCHES
IN NORTH CAROLINA.

AT 735 PM...NATIONAL WEATHER SERVICE RADAR SHOWED RAIN AND A FEW
THUNDERSTORMS CONTINUING OVER PARTS OF THE COASTAL PLAIN...SANDHILLS...
AND PIEDMONT. SOME OF THE HEAVIEST RAIN WAS OCCURRING IN CENTRAL AND
EASTERN CHATHAM COUNTY...SOUTHERN AND EASTERN WAKE COUNTY...AND IN
CUMBERLAND AND HARNETT COUNTIES.

THE RAIN AND THUNDERSTORMS WERE MOVING VERY SLOWLY. THEREFORE...
PERSISTENT HEAVY RAINFALL IN AREAS THAT HAD SUBSTANTIAL RAIN EALIER
COULD EXPERIENCE MINOR FLOODING OF STREETS...HIGHWAYS...AND POOR
DRAINAGE AREAS. SMALL CREEKS AND STREAMS CO7ULD BE SUBJECT TO RAPID
RISES.

LISTEN TO RADIO...TELEVISION...OR NOAA WEATHER RADIO FOR ADDITIONAL
STATEMENTS AND POSSIBLY WATCHES OR WARNINGS.

LGL
Special weather statement, Apr 30, 7:49 PM EDT, 41 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENSBORO NC
745 PM EDT SUN APR 30 1989

...SEVERE THUNDERSTORM WATCH FOR THE NORTHWEST PIEDMONT COUNTIES OF
   DAVIDSON..ROWAN..DAVIE..IREDELL AND RANDOLPH HAS BEEN CANCELLED.

AT 740 PM RADAR SHOWS SCATTERED SHOWERS AND POSSIBLE SOME THUNDERSTORMS
IN SOUTHERN FORSYTH AND NORTHERN DAVIDSON COUNTIES OF NORTH CAROLINA.
ALSO SCATTERED SHOWERS IN SOUTHERN ROWAN COUNTY.  THESE STORMS ARE
MOVING SLOWLTY NORTHEAST AT ABOUT 5 MPH.

THIS WILL BE THE LAST STATEMENT ON THESE STORMS.

DEH
THE LOOKOUT FOR THREATNING WEATHER AND TAKE SHELTER IF STORMS
APPROACH OR DEVELOPE.

OTHER STATEMENTS WILL BE ISSUED IF CONDITIONS WARRANT.

GR
Special weather statement, Apr 30, 7:52 PM EDT, 38 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENSBORO NC
745 PM EDT SUN APR 30 1989

...SEVERE THUNDERSTORM WATCH FOR THE NORTHWEST PIEDMONT COUNTIES OF
   DAVIDSON..ROWAN..DAVIE..IREDELL AND RANDOLPH HAS BEEN CANCELLED.

AT 740 PM RADAR SHOWS SCATTERED SHOWERS AND POSSIBLE SOME THUNDERSTORMS
IN SOUTHERN FORSYTH AND NORTHERN DAVIDSON COUNTIES OF NORTH CAROLINA.
ALSO SCATTERED SHOWERS IN SOUTHERN ROWAN COUNTY.  THESE STORMS ARE
MOVING SXLOWLY NORTHEAST AT ABOUT 5 MPH.

THIS WILL BE THE LAST STATEMENT ON THESE STORMS.

DEH

The office that day

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

IssuedProductOfficeCountiesLasted
May 1, 4:35 PM EDTSevere Thunderstorm WarningRAHWake55 min
May 1, 6:30 PM EDTTornado WarningRAHScotland45 min
May 1, 6:39 PM EDTTornado WarningRAHHoke, Moore66 min

Nearby

Flash Flood Warnings in North Carolina, 1989Every flash flood warning in 1989

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.