Alert archive / Hawaii / Flash Flood Warnings in 2006

Flash Flood Warning 1, NWS Honolulu, HI

January 23, 2006Kauai County, Hawaii

NWS Honolulu, HI issued this flash flood warning at Jan 23, 2006, 5:50 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
Jan 23, 2006, 5:50 AM HST (15:50 UTC)
Expired
Jan 23, 2006, 8:45 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 12:00Z, 3.8 hours before the alert went out and 25 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 2006-01-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 973 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 12:00Z on 2006-01-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 8 square meters per square second.193958Sfc1 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
973 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
731 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
8 m²/s²
0-3 km storm-relative helicity
74 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 231553
FFWHFO
HIC007-231845-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HONOLULU HI
550 AM HST MON JAN 23 2006

THE NATIONAL WEATHER SERVICE IN HONOLULU HAS ISSUED A

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

* UNTIL 845 AM HST

* AT 515 AM HST...A GAGE ON HANALEI RIVER SHOWED A RAPID RISE
  IN WATER LEVEL FROM HEAVY RAIN. THE WATER WILL LIKELY GO OVER THE 
  ROAD NEAR THE BRIDGE.

MOVE TO HIGHER GROUND NOW. STAY AWAY FROM STREAMS AND LOW LYING AREAS
PRONE TO FLOODING.

DO NOT TRY TO CROSS FAST FLOWING OR RISING WATER IN YOUR VEHICLE OR
ON FOOT. THE WATER MAY BE TOO DEEP TO CROSS SAFELY. TURN AROUND...
DON/T DROWN.

REPORT FLOODING TO POLICE OR CIVIL DEFENSE OFFICIALS FOR RELAY TO THE
NATIONAL WEATHER SERVICE.

THIS FLASH FLOOD WARNING MAY NEED TO BE EXTENDED BEYOND 845 AM HST IF
FLASH FLOODING CONDITIONS PERSIST.

LAT...LON 2210 15957 2210 15938 2228 15938 2228 15957

$$
1 follow-up statement
000
WGHW70 PHFO 231843
FFSHFO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HONOLULU HI
845 AM HST MON JAN 23 2006

HIC007-231809-
KAUAI IN KAUAI-
845 AM HST MON JAN 23 2006

...THE FLASH FLOOD WARNING IS CANCELLED FOR THE HANALEI AREA IN
KAUAI COUNTY...

SERIOUS FLOODING IS NO LONGER EXPECTED.

LAT...LON 2210 15957 2210 15938 2228 15938 2228 15957

$$

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 Jan 23, 4:00 AM HST, 1 hour 50 minutes earlier.

Area forecast discussion, Jan 23, 4:00 AM HST, 1 hour 50 minutes before
HAWAIIAN ISLANDS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
400 AM HST MON JAN 23 2006

.SYNOPSIS...AN UPPER LEVEL TROUGH WILL LINGER OVER THE HAWAIIAN
ISLANDS TODAY. IT IS EXPECTED TO SLOWLY WEAKEN IN THE NEXT COUPLE OF
DAYS. IN TURN...OUR AIR MASS WILL BECOME MORE STABLE IN TIME. A
SURFACE HIGH PRESSURE IS EXPECTED TO BUILD FAR NORTH OF THE ISLANDS
TUESDAY...RESULTING IN AN INCREASE OF TRADE WINDS. THIS HIGH WILL
PERSIST FAR NORTHEAST OF THE ISLANDS THROUGH THE REST OF THE
WEEK...MAINTAINING LIGHT TO MODERATE TRADE WINDS TO OUR AREA.

&&

.DISCUSSION...CONVECTION OVER OAHU HAS FINALLY DECREASED IN THE
PAST FEW HOURS. THUS WILL LET THE URBAN AND SMALL STREAM FLOOD
ADVISORY FOR OAHU EXPIRE THIS MORNING...THOUGH THE POTENTIAL FOR
HEAVY RAIN TO DEVELOP THROUGHOUT THE DAY CONTINUES. CONVECTION HAS
ALSO FLARED UP OVER THE WESTERN SLOPE OF MAUNA KEA AND NORTH KONA
LATE LAST NIGHT...THOUGH IT HAS ALSO SINCE DISSIPATED. KAUAI HAS
ALSO SEEN ITS SHARE OF HEAVY SHOWERS...THOUGH THE SHOWERS TRAVERSE
ACROSS QUITE RAPIDLY AND ARE NOT A PROBLEM AT TIME. THE UPPER LEVEL
TROUGH WITH A COUPLE OF EMBEDDED LOWS REMAIN IN OUR VICINITY TODAY
AND WILL KEEP AIR MASS UNSTABLE OVER THE ISLANDS. FORECAST CHARTS
INDICATE THIS TROUGH WILL SLOWLY WEAKEN WITH ONE LOW DRIFTING SOUTH
BECOMING CUT OFF WHILE REST OF THE TROUGH SHIFTS EAST. THUS EXPECT
UNSETTLED WEATHER TO CONTINUE OVER OUR AREA TODAY. HARD TO PIN POINT
EXACTLY WHERE THE HEAVY SHOWERS OR EVEN THUNDERSTORMS TO HIT. HAVE
INCREASED THE POPS AND BROAD BRUSHED THE SLIGHT CHANCE OF
THUNDERSTORMS TO MOST ZONES TODAY. STILL EXPECT THE WEATHER TO
SETTLE DOWN BEGINNING TONIGHT...AS AIR MASS COMING MORE STABLE IN
TIME.

A SURFACE LOW PRESSURE HAS DEVELOPED OVER THE ISLANDS...AND HAS
KEPT OUR TRADE WINDS ON LIGHT SIDE. THIS TROUGH IS TO SHIFT
EAST...WITH MODERATE TRADE WINDS RETURNING. ALSO A HIGH PRESSURE
FROM THE NORTHWEST WILL BUILD FAR NORTH OF THE ISLANDS BY TUESDAY.
EXPECT THE TRADE WINDS TO INCREASE TO MODERATE LEVEL BY THEN. THIS
HIGH WILL SETTLE TO THE FAR NORTHEAST OF THE ISLANDS TOWARDS THE
LATER PART OF THE WEEK AND WILL PREVAIL. IT WILL ALSO MAINTAIN LIGHT
TO MODERATE TRADE WINDS TO OUR AREA. MORE TYPICAL TRADE WIND WEATHER
IS TO RETURN THEN AS WELL.

&&

.MARINE...
MODERATE WINDS EAST OF THE ISLANDS HAVE GENERATED MODERATE SHORT
PERIOD EAST SWELL...AFFECTING OUR EAST FACING SHORES. EXPECT THIS
SWELL TO BE REINFORCED BY THE BUILDING TRADE WINDS IN THE COMING
DAYS. HIGH SURF ADVISORY FOR THE EAST FACING SHORES CONTINUES.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
HIGH SURF ADVISORY...EAST FACING SHORES

&&

HUI

In the hours before

Local storm report, Jan 23, 1:11 AM HST, 4 hours 39 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HONOLULU HI
111 AM HST MON JAN 23 2006

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

0916 PM     FLASH FLOOD      5 SE WAIKOLOA VILLAGE   19.89N 155.74W
01/22/2006                   HAWAII IN HAWAII   HI   EMERGENCY MNGR

            WAIKOLOA ROAD BETWEEN MILE MARKER 6 AND 9 WAS CLOSED DUE
            TO 6 INCHES DEBRIS AND WATER.

&&

HUI

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.