Alert archive / Hawaii / Flash Flood Warnings in 2006

Flash Flood Warning 102, NWS Honolulu, HI

March 26, 2006Honolulu County, Hawaii

NWS Honolulu, HI issued this flash flood warning at Mar 26, 2006, 9:30 AM HST for Honolulu 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 counties it named.

The facts

Issued
Mar 26, 2006, 9:30 AM HST (19:30 UTC)
Expired
Mar 26, 2006, 12:30 PM HST
In force
3 hr
Issued by
NWS Honolulu, HI
Area
Counties, with a storm outline in the text

County Honolulu County, HI

The nearest sounding before it

Lihue, (PHLI), launched 12:00Z, 7.5 hours before the alert went out and 155 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 12:00Z on 2006-03-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 261 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lihue, at 12:00Z on 2006-03-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 52 square meters per square second.1939Sfc1 km3 km6 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
261 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
854 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
52 m²/s²
0-3 km storm-relative helicity
59 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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 26, 4:00 AM HST, 5 hours 30 minutes earlier.

Area forecast discussion, Mar 26, 4:00 AM HST, 5 hours 30 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
400 AM HST SUN MAR 26 2006

.SYNOPSIS...
UNSTABLE WET WEATHER WILL CONTINUE ACROSS THE MAIN HAWAIIAN ISLANDS
TODAY AND THROUGH MOST OF THE NEXT WEEK AS A TROUGH OF LOW PRESSURE
PERSISTS TO OUR WEST. PARTICULARLY HEAVY RAINFALL MAY OCCUR TODAY
THROUGH MONDAY THEN WEDNESDAY THROUGH THURSDAY.

&&

.DISCUSSION...
A DEEP SOUTHWEST TO NORTHEAST ORIENTED TROUGH WEST OF THE MAIN
HAWAIIAN ISLANDS WILL KEEP THE POTENTIAL HIGH FOR HEAVY RAINFALL AT
TIMES THROUGH THE FORECAST PERIOD. SHORT WAVE IMPULSES ROTATE
THROUGH THE BASE OF THE LARGER TROUGH AND MOVE OVER THE
STATE...DRAGGING DEEP TROPICAL MOISTURE INTO THE PERPETUALLY
UNSTABLE ATMOSPHERE OVER THE ISLANDS AND TRIGGERING THE HEAVY
RAINFALL BURSTS.

MODELS SHOW THE NEXT IMPULSE AFFECTING THE ISLANDS TODAY THROUGH
MONDAY...WITH A SECOND IMPULSE EXPECTED WEDNESDAY THROUGH THURSDAY.
SATELLITE AND RADAR SHOW SHOWERS WITH THIS NEXT IMPULSE ARE ALREADY
DEVELOPING OVER THE KAUAI CHANNEL AND ACROSS SOUTHEAST PORTIONS OF
KAUAI. THIS ACTIVITY WILL LIKELY INTENSIFY THROUGH THE DAY TODAY AND
SPREAD EASTWARD. LOW LEVEL FLOW WILL REMAIN SOUTHERLY THROUGH
MIDWEEK...SO HAWAII WEATHER WILL BE WETTER THAN NORMAL EVEN BETWEEN
IMPULSES. THE PALL OF BROKEN TO OVERCAST MIDDLE AND HIGH CLOUDS LIE
ALONG THE EASTERN FLANK OF THE TROUGH AND WILL LIKELY BLOCK THE SUN
INTO EARLY NEXT WEEK.

AFTER THURSDAY...NOGAPS AND GFS WANT TO PUSH THE TROUGH TO THE EAST
OF THE ISLANDS. THIS WOULD BRING DRIER WEATHER TO THE STATE BY NEXT
WEEKEND. TRADE WINDS SHOULD GRADUALLY RETURN BY NEXT WEEKEND...BUT
RAINFALL WILL STILL LIKELY BE A BIT HEAVIER THAN NORMAL AS ALL THE
MOISTURE BROUGHT UP BY THE SOUTHERLIES FROM EARLIER IN THE WEEK GETS
CARRIED BACK WESTWARD OVER THE ISLANDS.

&&

.MARINE...
NEAR HIGH SURF CONDITIONS OF 8 FEET ON THE EAST FACING SHORES
EXPOSED TO THE NORTH SWELL WILL DECREASE SLOWLY THROUGH THE DAY
TODAY.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
WINTER STORM WATCH SUNDAY AFTERNOON THROUGH LATE MONDAY NIGHT FOR
MAUNA KEA AN MAUNA LOA.
FLASH FLOOD WATCH THROUGH LATE MONDAY NIGHT FOR ALL ISLANDS.

POWELL

In the hours before

Local storm report, Mar 26, 8:24 AM HST, 1 hour 6 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HONOLULU HI
824 AM HST SUN MAR 26 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0810 AM     FLASH FLOOD      4 W WAILUA              22.06N 159.40W
03/26/2006                   KAUAI IN KAUAI     HI   EMERGENCY MNGR

            KAMALU ROAD CLOSED DUE TO FLOODING IN WAILUA HOMESTEADS.

&&

BROWNING
Local storm report, Mar 26, 8:26 AM HST, 1 hour 4 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HONOLULU HI
826 AM HST SUN MAR 26 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0810 AM     FLASH FLOOD      5 N WAIMEA              22.03N 159.68W
03/26/2006                   KAUAI IN KAUAI     HI   EMERGENCY MNGR

            WAIMEA CANYON ROAD CLOSED DUE TO FLOODING.

&&

BROWNING

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 26, 3:18 AM HSTFlash Flood WarningHFOKauai3 hr
Mar 26, 4:11 AM HSTFlash Flood WarningHFOHonolulu3 hr
Mar 26, 6:01 AM HSTFlash Flood WarningHFOKauai3 hr
Mar 26, 6:33 AM HSTFlash Flood WarningHFOHonolulu3 hr
Mar 26, 12:30 PM HSTFlash Flood WarningHFOHonolulu60 min

Nearby

Flash Flood Warnings in Hawaii, 2006Every flash flood warning in 2006

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.