Alert archive / North Carolina / Flash Flood Warnings in 1999

Flash Flood Warning 32, NWS Raleigh, NC

September 28, 1999Wayne County, North Carolina

NWS Raleigh, NC issued this flash flood warning at Sep 28, 1999, 1:23 AM EDT for Wayne 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: Sep 28, 1999, 1:23 AM EDT (05:23 UTC)
Expired: Sep 28, 1999, 4:30 AM EDT
In force: 3 hr
Issued by: NWS Raleigh, NC
Area: Whole counties

County Wayne County, NC

The radar

The Raleigh/Durham radar (KRAX), 55 km from the middle of the area, began a volume at 05:25 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

Newport, NC (KMHX), launched 00:00Z, 5.4 hours before the alert went out and 121 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: 382 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 696 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 105 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 280521
FFWRDU
NCC191-280830-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE RALEIGH NC
123 AM EDT TUE SEP 28 1999

THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN WAYNE COUNTY IN NORTH CAROLINA

* UNTIL 430 AM EDT

* AT 120 AM... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM WITH VERY HEAVY RAIN ... MOVING NORTH AT 10 MILES AN
  HOUR.

* RAINFALL AMOUNTS OF ONE TO THREE INCHES FELL OVER MUCH OF WAYNE
  COUNTY MONDAY. SLOW MOVING MODERATE TO HEAVY RAINS ARE FALLING IN
  EASTERN WAYNE COUNTY AND ARE EXPECTED TO SLOWLY MOVE NORTH.
  RAINFALL AMOUNTS OF TWO INCHES PER HOUR OR MORE ARE EXPECTED AND
  ADDIVTIONAL FLOODING OF ROADS IS LIKELY.


RLH

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.

NWS Raleigh, NC wrote its last area forecast discussion before this flash flood warning went out at Sep 27, 9:35 PM EDT, 3 hours 48 minutes earlier.

Area forecast discussion, Sep 27, 9:35 PM EDT, 3 hours 48 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RALEIGH NC
935 PM EDT MON SEP 27 1999

AREA RAOBS AT 00Z CONTINUE TO SHOW A DEEPLY SATURATED AIRMASS OVER
CENTRAL NC WITH MOIST ADIABATIC CONDITIONS THROUGHOUT THE LOWER TO
MID LEVELS.  LOW LEVEL WINDS CONTINUE FROM THE SOUTHEAST WITH
TRAJECTORIES OFF THE GULF STREAM ATLANTIC AND WEAK TO MODERATE
SYNOPTIC SCALE ISENTROPIC LIFT.

GIVEN THESE CONDITIONS AND WEAK IMPULSES IN THE UPPER LEVELS FROM
THE SOUTHWEST... SHOWERS SHOULD CONTINUE TO DEVELOP OVER CENTRAL NC
TONIGHT. EVEN WITH AN APPARENT LULL BETWEEN IMPULSES NOW... FLASH
FLOOD WATCH WILL BE KEPT IN EFFECT OVER EASTERN CWA COUNTIES BECAUSE
OF THE POTENTIAL FOR REDEVELOPMENT OVERNIGHT AND THE SENSITIVITY TO
FLOODING IN THOSE COUNTIES.

THEREFORE...NOT MUCH CHANGE IS EXPECTED IN THE ACTUAL NUMBERS OF THE
FORECAST FOR TONIGHT.  THE WELL MIXED TROPICAL AIRMASS IS NOT AS
CONDUCIVE TO THUNDERSTORM DEVELOPMENT AND MUCH AS MODERATE TO HEAVY
SHOWERS.  THE MENTION OF THUNDERSTORMS WILL BE DROPPED IN SOME IF
NOT ALL OF THE GROUPS THE REMAINDER OF TONIGHT.

.RAH...FLASH FLOOD WATCH TONIGHT FOR GRANVILLE-VANCE-WARREN-HALIFAX-
DURHAM-WAKE-FRANKLIN-NASH-EDGECOMBE-WILSON-JOHNSTON-WAYNE-SAMPSON.

RFG

In the hours before

Local storm report, Sep 27, 8:41 PM EDT, 4 hours 42 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH/DURHAM NC
841 PM EDT MON SEP 27 1999

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0830 PM    PRINCETON                 NC   FLOODING
09/27/99   JOHNSTON                       A CREEK WAS REPORTED 2
                                          FEET OUT OF ITS BANKS ON
                                          HARPER HOUSE ROAD IN SE
                                          JOHNSTON COUNTY (ABOUT 15
                                          MILES S OF PRINCETON).

Local storm report, Sep 27, 8:51 PM EDT, 4 hours 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH/DURHAM NC
851 PM EDT MON SEP 27 1999

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0842 PM    MT OLIVE                  NC   FLOODING
09/27/99   WAYNE                          WATER IS CROSSING THE ROAD
                                          ON HWY 55 IN SOUTHERN
                                          WAYNE CO. AND HWY 111.

0847 PM    MT OLIVE                  NC   FLOODING
09/27/99   WAYNE                          WATER IS CROSSING THE ROAD
                                          ON HWY 55 AND HWY 111 IN
                                          SOUTHERN WAYNE CO.

Local storm report, Sep 27, 8:53 PM EDT, 4 hours 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH/DURHAM NC
853 PM EDT MON SEP 27 1999

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0852 PM                              NC   FLOODING
09/27/99   WILSON                         NUMEROUS STREETS AND ROADS
                                          ARE FLOODING THOUGHOUT THE
                                          COUNTY.

Local storm report, Sep 27, 8:53 PM EDT, 4 hours 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH/DURHAM NC
853 PM EDT MON SEP 27 1999

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0852 PM                              NC   FLOODING
09/27/99   WILSON                         NUMEROUS STREETS AND ROADS
                                          ARE FLOODING THOUGHOUT THE
                                          COUNTY.

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 27, 9:00 PM EDT	Flash Flood Warning	RAH	Wayne, Wilson	60 min
Sep 27, 11:12 PM EDT	Flash Flood Warning	RAH	Edgecombe	108 min
Sep 28, 1:04 AM EDT	Flash Flood Warning	RAH	Edgecombe	4 hr
Sep 28, 4:34 AM EDT	Flash Flood Warning	RAH	Wayne	6 hr
Sep 28, 7:11 AM EDT	Flash Flood Warning	RAH	Sampson	4 hr
Sep 28, 7:37 AM EDT	Flash Flood Warning	RAH	Johnston, Nash, Wilson	3 hr
Sep 28, 8:19 AM EDT	Flash Flood Warning	RAH	Edgecombe	4 hr
Sep 28, 11:07 AM EDT	Flash Flood Warning	RAH	Johnston, Wayne, Wilson	2 hr
Sep 28, 11:07 AM EDT	Flash Flood Warning	RAH	Nash	2 hr
Sep 28, 4:29 PM EDT	Flash Flood Warning	RAH	Edgecombe, Johnston, Nash, Wayne, Wilson	4 hr
Sep 28, 4:29 PM EDT	Flash Flood Warning	RAH	Sampson	4 hr
Sep 28, 4:29 PM EDT	Flash Flood Warning	RAH	Wake	4 hr
Sep 28, 5:27 PM EDT	Flash Flood Warning	RAH	Durham, Orange	3 hr

Nearby

Flash Flood Warnings in North Carolina, 1999 Every flash flood warning in 1999

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.