Alert archive / Hawaii / Flash Flood Warnings in 2004

Flash Flood Warning 32, NWS Honolulu, HI

February 28, 2004Honolulu County, Kauai County, Hawaii

NWS Honolulu, HI issued this flash flood warning at Feb 28, 2004, 3:30 AM HST for Honolulu County, Kauai County, Hawaii. 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 outline as issued.

The facts

Issued
Feb 28, 2004, 3:30 AM HST (13:30 UTC)
Expired
Feb 28, 2004, 6:30 AM HST
In force
3 hr
Issued by
NWS Honolulu, HI
Area
Counties, with a storm outline in the text

Counties Honolulu County, HI, Kauai County, HI

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Hilo, (PITO), launched 12:00Z, 1.5 hours before the alert went out and 76 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, Hilo, at 12:00Z on 2004-02-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 308 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Hilo, at 12:00Z on 2004-02-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 243 square meters per square second.1939587897Sfc1 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
308 J/kg
Mixed-layer CIN
-29 J/kg
Mixed-layer LCL
612 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
243 m²/s²
0-3 km storm-relative helicity
335 m²/s²
Significant tornado parameter
0.7
Supercell composite
3.5

Open this sounding in Storm Lab

The text

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

000 
WGHW50 PHFO 281331
FFWHI 
HIZ004-007-008-281630-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HONOLULU HI
330 AM HST SAT FEB 28 2004

THE NATIONAL WEATHER SERVICE IN HONOLULU HAS CONTINUED A

* FLASH FLOOD WARNING FOR
  NORTH AND EAST HAWAII INCLUDING WINDWARD KOHALA HAMAKUA HILO AND
  PUNA
  SOUTH HAWAII INCLUDING KAU
  WEST HAWAII INCLUDING LEEWARD KOHALA AND KONA

* UNTIL 630 AM HST

* AT 330 AM HST...RADAR INDICATED MODERATE TO HEAVY RAIN OVER MOST 
  OF THE ISLAND...WITH ADDITIONAL RAIN EXPECTED TO MOVE UP OVER THE 
  ISLAND FROM THE SOUTH.


* CIVIL AUTHORITIES HAVE CLOSED HIGHWAY 11 NEAR HIGHWAY MARKERS 57 
  AND 105 DUE TO WATER AND DEBRIS ACROSS THE ROAD.

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. TURN AROUND...DO NOT
DROWN

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 FLOODING TO THE POLICE FOR
IMMEDIATE RELAY TO THE NATIONAL WEATHER SERVICE.

LAT...LON 1886 15567 1956 15464 2043 15583 1979 15613
          1908 15601
$$

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 Feb 28, 3:30 AM HST, 0 minutes earlier.

Area forecast discussion, Feb 28, 3:30 AM HST, 0 minutes before
NARRATIVE SYNOPTIC DISCUSSION FOR WAKE ISLAND

...A HIGH SURF ADVISORY REMAINS IN EFFECT FOR WAKE ISLAND...

MODELS SHOW THE FRONTAL BOUNDARY TO YOUR NORTH WILL REACH WAKE
ISLAND BY 06Z FEB 29...OR LATER TODAY WAKE TIME. BY THAT TIME...YOUR
WINDS WILL HAVE BECOME STRENGTHENED NORTHEASTERLIES...GRADUALLY
BUILDING IN STRENGTH TO 35 MPH BY 00Z MAR 1. EXPECT CLOUDS AND
SHOWERS TO INCREASE TODAY AS THE FRONT APPROACHES...THEN DECREASE
AFTER FRONTAL PASSAGE.

THE NORTH NORTHWEST SWELL WILL DECREASE TO 7 TO 9 FEET SATURDAY AND
TO 4 FEET SUNDAY.

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 27, 2:31 PM HSTFlash Flood WarningHFO3 hr
Feb 27, 3:07 PM HSTFlash Flood WarningHFOHonolulu3 hr
Feb 27, 4:20 PM HSTFlash Flood WarningHFOKauai3 hr
Feb 27, 5:20 PM HSTFlash Flood WarningHFO3 hr
Feb 27, 5:41 PM HSTFlash Flood WarningHFOKauai3 hr
Feb 27, 5:50 PM HSTFlash Flood WarningHFOHonolulu3 hr
Feb 27, 8:24 PM HSTFlash Flood WarningHFOHonolulu3 hr
Feb 27, 8:36 PM HSTFlash Flood WarningHFOKauai3 hr
Feb 27, 9:50 PM HSTFlash Flood WarningHFOHonolulu, Kauai3 hr
Feb 27, 11:30 PM HSTFlash Flood WarningHFOKauai3 hr
Feb 28, 12:45 AM HSTFlash Flood WarningHFOHonolulu, Kauai3 hr
Feb 28, 6:30 AM HSTFlash Flood WarningHFOHonolulu, Kauai3 hr
Feb 28, 9:25 AM HSTFlash Flood WarningHFOHonolulu, Kauai3 hr

Nearby

Flash Flood Warnings in Hawaii, 2004Every flash flood warning in 2004

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.