Alert archive / Hawaii / Flash Flood Warnings in 2006

Flash Flood Warning 21, NWS Honolulu, HI

March 1, 2006Honolulu County, Hawaii

NWS Honolulu, HI issued this flash flood warning at Mar 1, 2006, 4:23 PM HST for Honolulu County, Hawaii. It was in force for 3 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Mar 1, 2006, 4:23 PM HST (02:23 UTC)
Expired: Mar 1, 2006, 7:30 PM HST
In force: 3 hr
Issued by: NWS Honolulu, HI
Area: Counties, with a storm outline in the text

County Honolulu County, HI

What was reported inside it

Time	Report	Where	Remark
Mar 1, 6:00 PM HST	FLASH FLOOD	Kahuku, HI	SPOTTER RECORDED 11 INCHES OF RAINFALL FROM 6 AM TO 6 PM.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lihue, (PHLI), launched 00:00Z, 2.4 hours before the alert went out and 167 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: 331 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 709 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 65 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 020227
FFWHFO
HIC003-020530-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HONOLULU HI
423 PM HST WED MAR 1 2006

THE NATIONAL WEATHER SERVICE IN HONOLULU HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE ISLAND OF OAHU IN HONOLULU COUNTY

* UNTIL 730 PM HST

* AT 423 PM HST...RADAR SHOWED HEAVY RAIN OVER THE ENTIRE LENGTH OF 
  THE KOOLAU RANGE...AND ALONG THE WINDWARD COAST...FROM MAUNAWILI 
  TO TURTLE BAY. RAINFALL RATES AS HIGH AS 3 INCHES PER HOUR ARE   
  OCCURRING AND THE AREA OF HEAVY RAIN IS NEARLY STATIONARY.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  KAHUKU...LAIE...HAUULA...PUNALUU...KANEOHE...MAUNAWILI.

THIS FLASH FLOOD WARNING REPLACES THE PRE-EXISTING WARNING THAT WAS
IN EFFECT FOR THE ISLAND OF OAHU.

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

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF STREAMS
AND WILL LIKELY CAUSE ROCK AND MUDSLIDES IN STEEP TERRAIN. BE ALERT 
FOR FALLING ROCKS

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 730 PM HST IF
FLASH FLOODING CONDITIONS PERSIST.

LAT...LON 2126 15779 2128 15763 2175 15792 2172 15806

$$

BIRCHARD

2 follow-up statements

000
WGHW70 PHFO 020258
FFSHFO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HONOLULU HI
456 PM HST WED MAR 1 2006

HIC003-020530-
ISLAND OF OAHU IN HONOLULU COUNTY-
456 PM HST WED MAR 1 2006

...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR THE ISLAND OF OAHU IN
HONOLULU COUNTY UNTIL 730 PM HST...

AT 455 PM HST...RADAR SHOWED AN AREA OF HEAVY RAIN ALONG THE EASTERN 
HALF OF OAHU...EAST OF A LINE FROM HALEIWA TO WHITMORE VILLAGE TO 
TANTALUS. THE AREA OF HEAVY RAIN WAS NEARLY STATIONARY.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
KAHUKU...WAIKANE...LAIE...KANEOHE...PUNALUU AND KAILUA.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF
STREAMS...HIGHWAYS...UNDERPASSES AND LOW LYING AREAS.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF STREAMS
AND COULD ALSO TRIGGER ROCK AND MUDSLIDES IN STEEP TERRAIN. BE ALERT 
FOR ROCK SLIDES

MOTORISTS SHOULD BE ALERT FOR FLOODING AND DEBRIS ON THE ROADWAYS. 
DO 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.

THE FLASH FLOOD WARNING MAY NEED TO BE EXTENDED BEYOND 730 PM HST IF
FLASH FLOODING CONDITIONS PERSIST.

LAT...LON 2126 15779 2128 15763 2175 15792 2172 15806

$$

BIRCHARD

000
WGHW70 PHFO 020355
FFSHFO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HONOLULU HI
550 PM HST WED MAR 1 2006

HIC003-020530-
ISLAND OF OAHU IN HONOLULU COUNTY-
550 PM HST WED MAR 1 2006

...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR THE ISLAND OF OAHU IN
HONOLULU COUNTY UNTIL 730 PM HST...

AT 548 PM HST...RADAR SHOWED OVER MOST OF OAHU...NORTH OF A LINE 
FROM MAILI TO MILILANI TO HALAWA TO KAHALUU. THE AREA OF HEAVY RAIN 
WAS BEGINNING TO MOVE NORTHWEST NEAR 10 MPH. 

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
KAHUKU...LAIE...WAIKANE...WAIAHOLE...KAHALUU...KANEOHE...KAILUA...
WAIMANALO AND PUNALUU.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF STREAMS
AND COULD ALSO TRIGGER ROCK AND MUDSLIDES IN STEEP TERRAIN. THE 
GROUND IS SATURATED OVER WINDWARD OAHU...FROM KAHALUU TO TURTLE 
BAY. A SPOTTER IN KAHUKU REPORTED 11 INCHES OF RAIN SINCE 6 AM TODAY.

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.

THE FLASH FLOOD WARNING MAY NEED TO BE EXTENDED BEYOND 730 PM HST IF
FLASH FLOODING CONDITIONS PERSIST.

LAT...LON 2126 15779 2128 15763 2175 15792 2172 15806

$$

BIRCHARD

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 1, 3:40 PM HST	Flash Flood Warning	HFO	Kauai	3 hr
Mar 1, 5:08 PM HST	Flash Flood Warning	HFO	Kauai	3 hr
Mar 1, 6:24 PM HST	Flash Flood Warning	HFO	Honolulu	3 hr
Mar 1, 7:56 PM HST	Flash Flood Warning	HFO	Kauai	3 hr
Mar 1, 9:30 PM HST	Flash Flood Warning	HFO	Honolulu	3 hr
Mar 1, 10:55 PM HST	Flash Flood Warning	HFO	Kauai	3 hr
Mar 2, 1:51 AM HST	Flash Flood Warning	HFO	Kauai	3 hr
Mar 2, 2:29 AM HST	Wind Advisory	HFO	Hawaii	18 hr
Mar 2, 2:42 AM HST	Flash Flood Warning	HFO	Honolulu	3 hr
Mar 2, 4:07 AM HST	Flash Flood Warning	HFO	Honolulu	3 hr
Mar 2, 6:50 AM HST	Flash Flood Warning	HFO	Honolulu	3 hr
Mar 2, 9:55 AM HST	Flash Flood Warning	HFO	Honolulu	3 hr
Mar 2, 12:55 PM HST	Flash Flood Warning	HFO	Honolulu	3 hr

Nearby

Flash Flood Warnings in Hawaii, 2006 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.