Alert archive / Hawaii / Flash Flood Warnings in 2004

Flash Flood Warning 24, NWS Honolulu, HI

February 27, 2004

NWS Honolulu, HI issued this flash flood warning at Feb 27, 2004, 5:20 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 outline as issued.

The facts

Issued: Feb 27, 2004, 5:20 PM HST (03:20 UTC)
Expired: Feb 27, 2004, 8:20 PM HST
In force: 3 hr
Issued by: NWS Honolulu, HI
Area: Counties, with a storm outline in the text

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

Lihue, (PHLI), launched 00:00Z, 3.3 hours before the alert went out and 150 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: 104 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 601 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 61 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
WGHW50 PHFO 280324
FFWHI 
HIZ002-280620-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HONOLULU HI
520 PM HST FRI FEB 27 2004

THE NATIONAL WEATHER SERVICE IN HONOLULU HAS CONTINUED A

* FLASH FLOOD WARNING FOR
  OAHU

* UNTIL 820 PM HST

* AT 515 PM HST...REPORTS FROM THE PUBLIC AND LAW ENFORCEMENT 
  OFFICIALS INDICATE ONGOING FLOODING ACROSS SEVERAL AREAS OF OAHU.

ALTHOUGH RAINFALL IS DIMINISHING SLOWLY...RUNOFF AND WATER LEVELS 
WILL REMAIN HIGH FOR SEVERAL HOURS.

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

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 2125 15812 2127 15756 2176 15798 2155 15840
$$

KODAMA

1 follow-up statement

000 
WGHW70 PHFO 280613
FFSHI 
HIZ002-280700-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HONOLULU HI
804 PM HST FRI FEB 27 2004

...THE FLASH FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE FOR OAHU...

...A FLASH FLOOD WATCH REMAINS IN EFFECT FOR OAHU UNTIL 4 AM HST 
SATURDAY...

WEATHER RADAR INDICATED THAT THE HEAVY RAINFALL HAS ENDED ACROSS 
OAHU. SPOTTER AND CIVIL DEFENSE REPORTS INDICATE SEVERAL AREAS OF 
SIGNIFICANT PONDING.  HOWEVER...THE THERE IS NO LONGER A THREAT FOR 
SERIOUS FLASH FLOODING. 

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

$$

KODAMA

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 27, 4:00 PM HST, 1 hour 20 minutes earlier.

Area forecast discussion, Feb 27, 4:00 PM HST, 1 hour 20 minutes before

HAWAIIAN ISLANDS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
4 PM HST FRI FEB 27 2004

.SYNOPSIS...
THE COLD FRONT HAS MOVED THROUGH KAUAI AND SITS IN THE KAUAI
CHANNEL. STRONG WINDS...HEAVY SHOWERS AND THUNDERSTORMS CONTINUE TO
THE EAST OF THE FRONT. THE HEAVY RAINFALL AND STRONG WINDS WILL
CONTINUE THROUGH THE NIGHT...AND INTO SATURDAY OVER THE BIG ISLAND.
ELSEWHERE...SHOWERS WILL GRADUALLY DIMINISH...BUT UNSTABLE AIR WILL
REMAIN OVER THE ISLANDS FOR THE NEXT SEVERAL DAYS...PROMOTING
SCATTERED SHOWERS WITH A CHANCE OF AFTERNOON THUNDERSTORMS. TRADES
ARE EXPECTED TO GRADUALLY RETURN BY MIDWEEK.

&&

.DISCUSSION...
A COLD FRONT IN THE KAUAI CHANNEL IS MOVING SLOWLY EAST...WITH
HEAVY SHOWERS AND THUNDERSTORMS IN BANDS FAR TO ITS EAST. THESE
BANDS DROPPED AS MUCH AS 9 INCHES OF RAINFALL ON THE ISLANDS OF
KAUAI AND OAHU...AND ARE EXPECTED TO BRING 2 TO 6 INCHES OF RAINFALL
TO MAUI COUNTY AND THE BIG ISLAND TONIGHT INTO SATURDAY. THE FRONT
AND ASSOCIATED HEAVY RAIN BANDS ARE ASSOCIATED WITH A LOW PRESSURE
SYSTEM NOW NORTH OF THE STATE. THE LOW IS EXPECTED TO MOVE VERY
SLOWLY NORTHEASTWARD OVER THE NEXT 24 TO 36 HOURS...AS AN UPPER LOW
ASSOCIATED WITH THIS SYSTEM DOES A LOOP NORTH OF THE STATE...THEN
MOVE OFF TOWARD THE NORTH NORTHEAST. THE UPPER LOW WILL MAINTAIN
INSTABILITY OVER THE ISLANDS OVER THE WEEKEND...BUT THE WEATHER WILL
GRADUALLY DRY OUT...AT LEAST OVER LEEWARD SIDES...NEXT WEEK.

&&

.MARINE...
A NORTHWEST SWELL CONTINUES TO PRODUCE VERY LARGE SURF ALONG NORTH
AND WEST FACING SHORES...WITH A HIGH SURF WARNING IN EFFECT. GALE
WARNINGS CONTINUE IN THE CHANNELS AND COASTAL WATERS.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
HIGH WIND WARNING TONIGHT ALL ISLANDS BUT KAUAI
FLASH FLOOD WATCH TOMOGHT ALL ISLANDS BUT KAUAI
WINTER STORM WARNING FOR BIG ISLAND SUMMITS THROUGH SATURDAY
HIGH SURF WARNING NORTH AND WEST FACING SHORES OF ALL ISLANDS BUT
LANAI THROUGH SATURDAY

FARRELL

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 27, 2:31 PM HST	Flash Flood Warning	HFO		3 hr
Feb 27, 3:07 PM HST	Flash Flood Warning	HFO	Honolulu	3 hr
Feb 27, 4:20 PM HST	Flash Flood Warning	HFO	Kauai	3 hr
Feb 27, 5:41 PM HST	Flash Flood Warning	HFO	Kauai	3 hr
Feb 27, 5:50 PM HST	Flash Flood Warning	HFO	Honolulu	3 hr
Feb 27, 8:24 PM HST	Flash Flood Warning	HFO	Honolulu	3 hr
Feb 27, 8:36 PM HST	Flash Flood Warning	HFO	Kauai	3 hr
Feb 27, 9:50 PM HST	Flash Flood Warning	HFO	Honolulu, Kauai	3 hr
Feb 27, 11:30 PM HST	Flash Flood Warning	HFO	Kauai	3 hr
Feb 28, 12:45 AM HST	Flash Flood Warning	HFO	Honolulu, Kauai	3 hr
Feb 28, 3:30 AM HST	Flash Flood Warning	HFO	Honolulu, Kauai	3 hr
Feb 28, 6:30 AM HST	Flash Flood Warning	HFO	Honolulu, Kauai	3 hr
Feb 28, 9:25 AM HST	Flash Flood Warning	HFO	Honolulu, Kauai	3 hr

Nearby

Flash Flood Warnings in Hawaii, 2004 Every 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.