Alert archive / Hawaii / Flash Flood Warnings in 2005

Flash Flood Warning 23, NWS Honolulu, HI

September 15, 2005Kauai County, Hawaii

NWS Honolulu, HI issued this flash flood warning at Sep 15, 2005, 1:26 AM HST for 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
Sep 15, 2005, 1:26 AM HST (11:26 UTC)
Expired
Sep 15, 2005, 4:30 AM HST
In force
3 hr
Issued by
NWS Honolulu, HI
Area
Counties, with a storm outline in the text

County 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, 11.4 hours before the alert went out and 18 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 2005-09-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 772 joules per kilogram.LCLLFCEL10008507005003002001001 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 2005-09-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 43 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
772 J/kg
Mixed-layer CIN
-16 J/kg
Mixed-layer LCL
755 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
43 m²/s²
0-3 km storm-relative helicity
132 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.0

Open this sounding in Storm Lab

The text

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

000
WGHW50 PHFO 151130
FFWHFO
HIC007-151430-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HONOLULU HI
126 AM HST THU SEP 15 2005

THE NATIONAL WEATHER SERVICE IN HONOLULU HAS CONTINUED THE

* FLASH FLOOD WARNING FOR...
  THE ISLAND OF KAUAI IN KAUAI COUNTY

* UNTIL 430 AM HST

* AT 118 AM HST...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED   
  FLOODING CONTINUES ALONG THE HANALEI RIVER...KEEPING THE KUHIO 
  HIGHWAY CLOSED. RADAR SHOWS HEAVY RAINFALL CONTINUES ACROSS 
  PORTIONS OF SOUTH...CENTRAL AND WEST KAUAI.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WAINIHA...
  POLIHALE STATE PARK...MOLOAA...KAPAA...KILAUEA...KALALAU VALLEY...
  HANALEI...HANAKOA VALLEY...HANAKAPIAI VALLEY...HAENA AND ANAHOLA.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE 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...DON/T
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.

THIS FLASH FLOOD WARNING MAY NEED TO BE EXTENDED BEYOND 430 AM HST IF
FLASH FLOODING CONDITIONS PERSIST.

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 2226 15926 2179 15926 2195 15985 2227 15976

$$

POWELL
1 follow-up statement
000
WGHW70 PHFO 151431
FFSHFO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HONOLULU HI
429 AM HST THU SEP 15 2005

HIC007-151439-
KAUAI-
429 AM HST THU SEP 15 2005

...THE FLASH FLOOD WARNING FOR THE ISLAND OF KAUAI IN KAUAI
COUNTY WILL EXPIRE AT 430 AM HST...

WHILE RAINFALL AND STREAM LEVELS HAVE SUBSIDED FOR NOW...ADDITIONAL
HEAVY RAINS ARE POSSIBLE LATER.

RIVER GAUGES SHOW DECREASING HEIGHTS BELOW FLOOD STAGE AND KUHIO 
HIGHWAY REOPENING HAS ALREADY OCCURRED OR IS IMMINENT.

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 2226 15926 2179 15926 2195 15985 2227 15976

$$

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 Sep 14, 8:30 PM HST, 4 hours 56 minutes earlier.

Area forecast discussion, Sep 14, 8:30 PM HST, 4 hours 56 minutes before
HAWAIIAN ISLANDS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
830 PM HST WED SEP 14 2005

.SYNOPSIS...TROUGHING ALOFT AND ABUNDANT LOW LEVEL MOISTURE WILL
KEEP THE POSSIBILITY OF HEAVY TRADE WIND SHOWERS ALIVE THROUGH
THURSDAY. DRIER AND MORE STABLE WEATHER IS EXPECTED FRIDAY AND
THEREAFTER. SURF ALONG SOUTHERN SHORES WILL REMAIN ELEVATED THROUGH
FRIDAY.

&&

.DISCUSSION...THE FEATURE AFFECTING HAWAIIAN WEATHER THE MOST THIS
EVENING IS AN UPPER TROUGH WITH AN AXIS 300 TO 400 MILES WEST OF THE
MAIN HAWAIIAN ISLANDS. WE ARE IN THE UNSTABLE UPLIFT PORTION OF THIS
TROUGH...WITH SOUTHWEST WINDS NOTED IN SOUNDINGS ABOVE ABOUT 10000
FEET. A SHORT WAVE TRAVELING THROUGH THE BASE OF THE LONG WAVE
TROUGH IS CURRENTLY TRIGGERING HEAVY SHOWERS OVER KAUAI AND AREAS OF
WINDWARD OAHU. HEAVY SHOWERS AND POSSIBLY THUNDERSTORMS MAY OCCUR
ACROSS THESE ISLANDS TONIGHT BEFORE THE SHORT WAVE MOVES AWAY.

THE 00Z GFS75 SHOWS THE UPPER TROUGH WILL REMAIN OVER THE REGION
THROUGH THURSDAY...ENHANCING TRADE WIND SHOWERS OVER MAINLY WINDWARD
AND MAUKA AREAS. LEEWARD SLOPES OF THE BIG ISLAND MAY SEE SOME
ENHANCEMENT AS WELL IN THE AFTERNOON AND EVENING. ON FRIDAY THE
UPPER TROUGH WILL DRIFT TO THE NORTHWEST AND WEAK RIDGING WILL BUILD
OVER THE STATE FROM THE EAST. THIS WILL BRING A SLIGHT INCREASE IN
STABILITY AND REDUCE THE THREAT OF HEAVY SHOWERS FOR THE REMAINDER
OF THE FORECAST PERIOD. MODERATE TO LOCALLY FRESH TRADE WINDS WILL
PERSIST THROUGH THE WEEKEND AS HIGH PRESSURE PERSISTS NORTH OF THE
STATE. TRADES MAY DECREASE SLIGHTLY EARLY NEXT WEEK AS THE HIGH
MOVES OFF TO THE NORTHEAST.

TROPICAL STORM JOVA...UPGRADED FROM TROPICAL DEPRESSION TEN E...IS
LOCATED ABOUT 1750 MILES EAST SOUTHEAST OF HILO. THE OFFICIAL
FORECAST...ISSUED BY THE NATIONAL HURRICANE CENTER IN MIAMI...HAS
JOVA STRENGTHENING INTO A MINIMAL HURRICANE AND REACHING A POINT 600
MILES EAST SOUTHEAST OF HILO SATURDAY AFTERNOON. GIVEN THE
UNCERTAINTY INVOLVED IN TRACK FORECASTING AT DAY FIVE...WE WILL HOLD
OFF MAKING ANY CHANGES IN THE LOCAL FORECAST AT THIS TIME AND WILL
MAINTAIN A TRADE WIND FORECAST. THIS SYSTEM WILL BE CLOSELY
MONITORED AS IT APPROACHES THE REGION. THE CENTRAL PACIFIC HURRICANE
CENTER WILL ASSUME FORECAST RESPONSIBILITY FOR JOVA WHEN IT CROSSES
140W ON SATURDAY.

&&

.MARINE...SURF ALONG SOUTH FACING SHORES WILL REMAIN ELEVATED AT THE
15 FOOT WARNING LEVEL INTO THURSDAY. CIVIL DEFENSE REPORTED MINOR
INCIDENTS OF SURF WASHING ONTO ROADS NEAR LAWAI BEACH ON KAUAI AND
IN NANAKULI ON OAHU...AS WELL AS WATER SPLASHING OVER THE SEA WALL
AT ALII DRIVE IN KAILUA KONA. SURF IS EXPECTED TO SUBSIDE BELOW THE
WARNING LEVEL ON THURSDAY...YET REMAIN ABOVE THE ADVISORY LEVEL OF
8 FEET INTO EARLY SATURDAY.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
SMALL CRAFT ADVISORY...LARGE OPEN OCEAN SWELLS
SMALL CRAFT ADVISORY...WINDS IN MAALAEA BAY
HIGH SURF WARNING...SOUTH FACING SHORES
FLOOD WATCH...OAHU AND MOLOKAI

&&

POWELL

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 14, 5:56 PM HSTFlash Flood WarningHFOKauai2 hr
Sep 14, 7:48 PM HSTFlash Flood WarningHFOKauai3 hr
Sep 14, 10:40 PM HSTFlash Flood WarningHFOKauai3 hr
Sep 15, 12:35 AM HSTFlash Flood WarningHFOKalawao3 hr
Sep 15, 7:48 AM HSTFlash Flood WarningHFOHawaii3 hr
Sep 15, 10:45 AM HSTFlash Flood WarningHFOHawaii3 hr
Sep 15, 12:26 PM HSTFlash Flood WarningHFOHawaii3 hr

Nearby

Flash Flood Warnings in Hawaii, 2005Every flash flood warning in 2005

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.