Alert archive / Hawaii / Flash Flood Warnings in 2005

Flash Flood Warning 38, NWS Honolulu, HI

October 25, 2005Honolulu County, Hawaii

NWS Honolulu, HI issued this flash flood warning at Oct 25, 2005, 12:06 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 outline as issued.

The facts

Issued
Oct 25, 2005, 12:06 AM HST (10:06 UTC)
Expired
Oct 25, 2005, 3:00 AM HST
In force
3 hr
Issued by
NWS Honolulu, HI
Area
Counties, with a storm outline in the text

County Honolulu 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, 10.1 hours before the alert went out and 161 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 2005-10-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 126 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 2005-10-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -1 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
126 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
977 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
-1 m²/s²
0-3 km storm-relative helicity
32 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 251012
FFWHFO
HIC003-251300-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HONOLULU HI
1206 AM HST TUE OCT 25 2005

THE NATIONAL WEATHER SERVICE IN HONOLULU HAS ISSUED A

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

* UNTIL 300 AM HST

* AT 1201 AM HST...RADAR SHOWED MORE HEAVY RAIN MOVING NORTHWESTWARD 
  OVER WINDWARD...CENTRAL AND SOUTH OAHU.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  HONOLULU...WHEELER AFB...WHITMORE VILLAGE...WAHIAWA...PUPUKEA... 
  PUNALUU...LAIE...KAHUKU...KAAAWA...HAUULA AND HALEIWA.

THIS WARNING REPLACES THE FLOOD ADVISORY ISSUED EARLIER.

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

BE ESPECIALLY CAUTIOUS SINCE IT IS HARDER TO SEE FLASH FLOODING IN
THE DARK. AVOID TRAVEL.

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 300 AM HST IF
FLASH FLOODING CONDITIONS PERSIST.

LAT...LON 2119 15788 2130 15762 2178 15792 2162 15819
      2142 15804

$$
2 follow-up statements
000
WGHW70 PHFO 251105
FFSHFO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HONOLULU HI
1258 AM HST TUE OCT 25 2005

HIC003-251300-
HONOLULU-
1258 AM HST TUE OCT 25 2005

...A FLASH FLOOD WARNING CONTINUES UNTIL 300 AM HST FOR THE ISLAND OF
OAHU IN HONOLULU COUNTY...

AT 1254 AM HST...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED THAT THE 
KAPAA QUARRY ROAD IS CLOSED DUE TO WATER ON THE ROAD. ALSO...THAT 
WATER REMAINS WITHIN THE BANKS OF THE WAIAHOLE STREAM ON THE 
WINDWARD SIDE OF OAHU...BUT THAT THE WATER IS RISING. POLICE ARE 
MONITORING THE STREAM...AND MAY CLOSE THE HIGHWAY IF NEEDED. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO HONOLULU... 
WHEELER AFB...WHITMORE VILLAGE...WAHIAWA...PUPUKEA...PUNALUU... 
LAIE...KAHUKU...KAAAWA...HAUULA AND HALEIWA.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS.

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.

LAT...LON 2119 15788 2130 15762 2178 15792 2162 15819
      2142 15804

$$
000
WGHW70 PHFO 251218
FFSHFO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HONOLULU HI
215 AM HST TUE OCT 25 2005

HIC003-251219-
HONOLULU-
215 AM HST TUE OCT 25 2005

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

THE HEAVY RAIN HAS ENDED AND FLASH FLOODING IS NO LONGER EXPECTED.
POLICE REPORT THAT BOTH THE KAPAA QUARRY ROAD AND KAMEHAMEHA HIGHWAY 
AT THE WAIAHOLE STREAM ARE NOW OPENED FOR TRAFFIC.

ALTHOUGH THE THREAT OF FLOODING HAS ENDED...PONDING OF WATER IN LOW 
LYING AREAS IS STILL POSSIBLE. MOTORISTS ARE URGED TO EXERCISE 
CAUTION DUE TO WATER ON THE ROAD.

LAT...LON 2119 15788 2130 15762 2178 15792 2162 15819
      2142 15804

$$

CRAIG

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 Oct 24, 8:30 PM HST, 3 hours 36 minutes earlier.

Area forecast discussion, Oct 24, 8:30 PM HST, 3 hours 36 minutes before
HAWAIIAN ISLANDS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
830 PM HST MON OCT 24 2005

.SYNOPSIS...A HIGH PRESSURE RIDGE TO THE NORTH WILL KEEP TRADE WINDS
BLOWING OVER HAWAII THROUGH NEXT WEEK. THE TRADES WILL CARRY AREAS
OF UNSTABLE LOW CLOUDS OVER THE ISLANDS. ONE OF THESE CLOUD AREAS
WILL MAKE IT RATHER SHOWERY TONIGHT ON OAHU AND KAUAI. THE SHOWERS
WILL FALL MAINLY OVER WINDWARD AREAS.

&&

.DISCUSSION...
AN EAST TO WEST RIDGE ABOUT 500 MILES NORTH OF THE ISLANDS WILL
MAINTAIN MODERATE TO LOCALLY BREEZY TRADE WINDS THROUGH THURSDAY.
THE TRADES ARE FORECAST TO WEAKEN STARTING FRIDAY AS A MID-LATITUDE
TROUGH DIGS TOWARDS THE ISLANDS FROM THE NORTHWEST. THE TROUGH AND
ASSOCIATED COLD FRONT IS FORECAST TO STAY NORTH OF THE RIDGE AND NOT
BRING RAIN TO THE ISLANDS.

A WEAK DISTURBANCE EMBEDDED IN THE TRADE FLOW...SOMETIMES CALLED A
SCREAMING EAGLE BECAUSE OF ITS APPEARANCE ON SATELLITE IMAGERY...
WILL BRING SHOWERY WEATHER TO OAHU NOW AND KAUAI LATER TONIGHT AND
TUESDAY MORNING. A SECOND DISTURBANCE FARTHER TO THE NORTHEAST MAY
WET KAUAI AND OAHU TOMORROW NIGHT IF IT HOLDS TOGETHER OR DOES NOT
PASS NORTH OF THE ISLANDS.

THE WET TRADES ARE THE RESULT OF AN UPPER TROUGH THAT HAS FORMED
OVER THE STATE. THE TUTT OR TROPICAL UPPER TROPOSPHERIC TROUGH HAS
WEAKENED THE SUBSIDENCE INVERSION ASSOCIATED WITH THE SURFACE RIDGE
TO OUR NORTH...ALLOWING THE MARINE LAYER TO RISE ABOVE 7000 FEET.
INSERT MOISTURE INTO THE MARINE LAYER IN THE FORM OF THE ABOVE
MENTIONED DISTURBANCES AND YOU GET WET TRADES. PROGS SAY THAT THE
TROUGH WILL MOVE SLOWLY NORTHWEST OVER THE NEXT 36 HOURS THEN REMAIN
NEARLY STATIONARY NORTHWEST OF KAUAI. IT COULD KEEP THE ATMOSPHERE
OVER THE ISLANDS A BIT UNSTABLE AND OUR TRADES WET ALL WEEK.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
SMALL CRAFT ADVISORY FOR WATERS SOUTH OF THE BIG ISLAND.

&&

CRAIG

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.