Alert archive / Hawaii / Flash Flood Warnings in 2003

Flash Flood Warning 9, NWS Honolulu, HI

November 29, 2003

NWS Honolulu, HI issued this flash flood warning at Nov 29, 2003, 8:10 PM HST. 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: Nov 29, 2003, 8:10 PM HST (06:10 UTC)
Expired: Nov 29, 2003, 11:00 PM HST
In force: 3 hr
Issued by: NWS Honolulu, HI
Area: Whole counties

The text

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

000 
WGHW50 PHFO 300611
FFWHI 
HIZ002-300900-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HONOLULU HI
810 PM HST SAT NOV 29 2003

THE NATIONAL WEATHER SERVICE IN HONOLULU HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  OAHU

* UNTIL 1100 PM HST

* AT 805 PM HST...RADAR INDICATED VERY HEAVY RAIN OVER KAHALUU...OR
  ABOUT 7 MILES NORTHWEST OF KANEOHE.  THE AREA OF HEAVY RAIN WAS
  NEARLY STATIONARY.

* LOCATIONS IN THE WARNING INCLUDE AHUIMANU...HAUULA...KAAAWA... 
  KAHALUU AND PUNALUU

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF STREAMS
AND COULD ALSO TRIGGER ROCK AND MUDSLIDES IN STEEP TERRAIN.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF
STREAMS...HIGHWAYS...UNDERPASSES AND LOW LYING AREAS.

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

MOTORISTS SHOULD BE ALERT FOR FLOODING AND SHOULD NOT ATTEMPT TO
CROSS FAST FLOWING OR RISING WATER. MANY FLASH FLOOD DEATHS OCCUR
WHEN MOTORISTS TRY CROSSING FLOODED ROADWAYS.

ESCAPE RISING WATER BY CLIMBING DIRECTLY TO HIGHER GROUND. NEVER TRY
TO OUTRACE A FLOOD...EITHER ON FOOT OR IN YOUR VEHICLE. DO NOT CAMP
NEAR STREAMS OR OTHER AREAS SUBJECT TO FLOODING.

STAY TUNED TO NOAA WEATHER RADIO OR OTHER LOCAL MEDIA SOURCES FOR THE
LATEST SEVERE WEATHER INFORMATION. REPORT SEVERE WEATHER TO THE
POLICE FOR IMMEDIATE RELAY TO THE NATIONAL WEATHER SERVICE.

$$
LAT...LON 2157 15799 2139 15784 2144 15776 2163 15789

POWELL

1 follow-up statement

000 
WGHW70 PHFO 300726
FFSHI 
HIZ002-300900-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HONOLULU HI
930 PM HST SAT NOV 29 2003

...THE FLASH FLOOD WARNING IS CANCELLED FOR OAHU...

WEATHER RADAR INDICATED THE HEAVY RAINFALL HAS ENDED ACROSS THE
WARNED AREA....AND THERE IS NO LONGER A THREAT FOR SERIOUS FLOODING.
HOWEVER...SHOWERS WILL CONTINUE OVER WINDWARD OAHU THROUGH THE NIGHT.

STAY TUNED TO NOAA WEATHER RADIO...LOCAL TV OR RADIO FOR FURTHER
INFORMATION FROM THE NATIONAL WEATHER SERVICE.

$$
POWELL

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 Honolulu, HI wrote its last area forecast discussion before this flash flood warning went out at Nov 29, 4:45 PM HST, 3 hours 25 minutes earlier.

Area forecast discussion, Nov 29, 4:45 PM HST, 3 hours 25 minutes before

HAWAIIAN ISLANDS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
445 PM HST SAT NOV 29 2003

.SYNOPSIS...A NEARLY STATIONARY SHEARLINE WILL BRING SOME HEAVY
SHOWERS TO WINDWARD AND MAUKA SECTIONS TONIGHT. A TROUGH OF LOW
PRESSURE WILL SETTLE OVER THE ISLANDS NEXT WEEK...SO THE WEATHER
PATTERN WILL REMAIN SOMEWHAT UNSETTLED INTO EARLY NEXT WEEK.

&&

.DISCUSSION...ITS NOT SURPRISING THAT THE 00Z SOUNDINGS SHOW
PRECIPITABLE WATER NEAR AN INCH AND THREE QUARTERS AT BOTH SITES...
AND K-INDICIES OF 26 AT PHTO AND 31 AT PHLI. THE SHOWERS WITH THIS
SHEARLINE REALLY FIRED UP AS THEY APPROACHED THE ISLANDS...AND
CONVERGENCE PLUMES FROM MOLOKAI AND MAUI HAVE HELPED TO LOCALLY
ENHANCE VERTICAL MOTION.

FORECAST IS QUITE A TRICKY ONE...AND ONE THAT WILL PROBABLY REQUIRE
A GREAT DEAL OF LATER REFINEMENT. THE PLAN FOR NOW IS THAT THE
SHEARLINE WILL SLOWLY DRIFT WESTWARD TONIGHT BRINGING THE MOST
SHOWERS TO WINDWARD SECTIONS. HOWEVER...RECENT SATELLITE AND RADAR
IMAGERY SUGGESTS THAT THE SHEARLINE MAY BE STALLING. CONTINUED
CHANCE OF HEAVY RAIN AND THUNDERSTORMS OVERNIGHT MUCH LIKE WE SAW
TODAY. HAVE A BRIEF PERIOD OF MODERATE TRADES FORECASTED TONIGHT AND
SUNDAY...BEFORE THE NEXT MID LEVEL TROUGH BEGINS DIGGING TOWARD
HAWAII ON MONDAY. THE MID LEVEL TROUGH WILL INDUCE SURFACE TROUGHING
AS WELL. THE MODELS NOW SEEM TO BE CONVERGING ON YESTERDAYS ECMWF
SOLUTION OF A STRONGER LOW NOT FAR TO THE NORTH...THAT WILL BRING A
COLD FRONT THROUGH THE WESTERN AND POSSIBLY THE MIDDLE ISLANDS BY
TUESDAY. CONVERGENT LOW LEVEL FLOW BOTH AHEAD OF...AND ALONG THE
FRONT WILL MEAN ANOTHER CHANCE FOR HEAVY SHOWERS DURING THAT PERIOD.
THERE IS THE POSSIBILITY THAT THE FRONT MAY GET HUNG UP OVER THE
ISLANDS INTO MIDWEEK...BUT FOR NOW HAVE TRENDED THE FORECAST BACK
TOWARD MODERATE TRADES IN THE LONGER RANGE. STAY TUNED.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
HIGH SURF WARNING FOR EAST FACING SHORES.
HIGH SURF ADVISORY FOR NORTH FACING SHORES.
SMALL CRAFT ADVISORY FOR ALL HAWAIIAN WATERS

&&

R BALLARD

The office that day

Everything else NWS Honolulu, HI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 29, 2:45 PM HST	Flash Flood Warning	HFO		3 hr

Nearby

Flash Flood Warnings in Hawaii, 2003 Every 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.