Alert archive / Hawaii / Flash Flood Warnings in 2004

Flash Flood Warning 40, NWS Honolulu, HI

March 14, 2004Honolulu County, Kauai County, Hawaii

NWS Honolulu, HI issued this flash flood warning at Mar 14, 2004, 2:50 PM 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
Mar 14, 2004, 2:50 PM HST (00:50 UTC)
Expired
Mar 14, 2004, 6:00 PM 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

Lihue, (PHLI), launched 00:00Z, 0.8 hours before the alert went out and 467 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, Lihue, at 00:00Z on 2004-03-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 joules per kilogram.LCLEL10008507005003002001001 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, Lihue, at 00:00Z on 2004-03-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -4 square meters per square second.1939Sfc1 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
3 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
1109 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
-4 m²/s²
0-3 km storm-relative helicity
17 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 
WGHW50 PHFO 150053
FFWHI 
HIZ004-007-150400-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HONOLULU HI
250 PM HST SUN MAR 14 2004

THE NATIONAL WEATHER SERVICE IN HONOLULU HAS ISSUED A

* FLASH FLOOD WARNING FOR
  NORTH KOHALA...SOUTH KOHALA...HAMAKUA...
  HILO AND PUNA DISTRICTS OF THE BIG ISLAND

* UNTIL 600 PM HST

* AT 245 PM HST...RADAR AND RAIN GAGES INDICATED HEAVY RAINS OVER 
  THE HILO AND HAMAKUA DISTRICTS OF THE BIG ISLAND.  RAIN HAS 
  DIMINISHED OVER THE KOHALA AREA BUT RUNOFF AND STREAM LEVELS 
  REMAIN HIGH.

* LOCATIONS IMPACTED INCLUDE...
  HAWI...KAMUELA...HONOKAA...HONOMU AND HILO.

EXCESSIVE RUNOFF FROM THIS STORM CONTINUES TO PRODUCE FLASH FLOODING 
OF STREAMS AND COULD ALSO TRIGGER ROCK AND MUDSLIDES IN STEEP 
TERRAIN.

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 2030 15587 2012 15595 1933 15503 1950 15480
          1994 15509
$$

KODAMA
1 follow-up statement
000 
WGHW70 PHFO 150340
FFSHI 
HIZ004-007-151400-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HONOLULU HI
446 PM HST SUN MAR 14 2004

...A FLASH FLOOD WATCH REMAINS IN EFFECT FOR THE ENTIRE BIG ISLAND 
OF HAWAII UNTIL 4 AM HST...

...THE FLASH FLOOD WARNING HAS EXPIRED FOR WEST HAWAII INCLUDING 
LEEWARD KOHALA AND KONA...AND FOR NORTH AND EAST HAWAII INCLUDING 
WINDWARD KOHALA HAMAKUA HILO AND PUNA...

WEATHER RADAR INDICATED THE HEAVY RAINFALL HAS ENDED ACROSS THE
WARNED AREA....AND THERE IS NO LONGER A THREAT FOR SERIOUS FLOODING 
AT THIS TIME. 

A FLASH FLOOD WATCH MEANS THAT FLASH FLOODING IS POSSIBLE BUT NOT
IMMINENT IN THE WATCH AREA.  PERSONS IN THE WATCH AREA...
ESPECIALLY THOSE IN LOW LYING AREAS...ALONG STREAMS...AND OTHER
DRAINAGES SHOULD BE PREPARED TO TAKE QUICK ACTION IF HEAVY RAINS
OR FLOODING OCCURS OR A WARNING IS ISSUED.

A SHEARLINE OVER THE BIG ISLAND COMBINED WITH GOOD UPPER LEVEL
SUPPORT CONTINUES TO PROVIDE AN ENVIRONMENT FAVORABLE FOR HEAVY
RAINS.  THE GROUND IS ALSO SATURATED OVER THE KOHALA...HAMAKUA...
HILO AND PUNA DISTRICTS WHICH INCREASES THE POSSIBILITY OF FLOODING.

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

$$

FARRELL

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 Mar 14, 2:47 PM HST, 3 minutes earlier.

Area forecast discussion, Mar 14, 2:47 PM HST, 3 minutes before
NARRATIVE SYNOPTIC DISCUSSION FOR AMERICAN SAMOA AND THE INDEPENDENT
STATE OF SAMOA

TONIGHT THROUGH TUESDAY...
HIGH PRESSURE FAR TO THE SOUTH OF SAMOA WILL KEEP EASTERLIES
BLOWING ACROSS THE SAMOA ISLANDS IN THE 15 KT RANGE THROUGH TUESDAY.
BROAD SURFACE CONVERGENCE ACROSS THE AREA HAS RESULTED IN TWO AREAS
OF SIGNIFICANT CONVECTION TO THE NORTHWEST AND SOUTHEAST OF YOUR
AREA.  WHILE IT APPEARS OVER THE NEXT 24 TO 48 HOURS THAT CONDITIONS
WILL CHANGE LITTLE...CANNOT RULE OUT THE POSSIBILITY OF HEAVY
CONVECTIVE AREAS DEVELOPING OVER OR MOVING INTO THE SAMOA AREA.
EXPECT GENERALLY PARTLY CLOUDY SKIES AND ISOLATED SHOWERS...WITH A
FEW BOUTS OF MORE SIGNIFICANT CLOUDS AND SHOWERS THROWN INTO THE MIX.

NO SIGNIFICANT SWELL IS EXPECTED.

OUTLOOK FOR WEDNESDAY THROUGH FRIDAY...
MODELS CONTINUE TO INDICATE NO REAL CHANGES TO THE WEATHER PATTERN
THROUGH FRIDAY. TRADES WILL REMAIN IN THE 10 TO 15 KT RANGE.  HIGH
PRESSURE REMAINS ENTRENCHED EAST OF NEW ZEALAND...THUS BROAD SOUTH
PACIFIC CONVERGENCE ZONE WILL STAY PUT OVER OR NEAR YOUR AREA.

NARRATIVE DISCUSSION FOR TUVALU

TONIGHT THROUGH WEDNESDAY...TUVALU TIME...
SCATTERED SHOWERS AND THUNDERSTORMS CONTINUE TO AFFECT PRIMARILY THE
SOUTHERN HALF OF THE TUVALU ISLANDS...WITH A FEW DRIFTING OVER THE
NORTHERN HALF. WITH LITTLE MOVEMENT OF THE BROAD CONVERGENCE AREA
EXPECTED THROUGH THE PERIOD...EXPECT MOSTLY CLOUDY SKIES TO
CONTINUE ACROSS THE ENTIRE CHAIN...ALTHOUGH SHOWERS AND
THUNDERSTORMS WILL AFFECT PRIMARILY THE SOUTHERN ISLANDS. WINDS WILL
REMAIN EASTERLY AROUND 10 KT.

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 15, 9:55 AM HSTFlash Flood WarningHFOKauai3 hr
Mar 15, 1:00 PM HSTFlash Flood WarningHFOKauai3 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.