Alert archive / Hawaii / Flash Flood Warnings in 2005
Flash Flood Warning 31, NWS Honolulu, HI
NWS Honolulu, HI issued this flash flood warning at Oct 1, 2005, 1:00 PM 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 1, 2005, 1:00 PM HST (23:00 UTC)
- Expired
- Oct 1, 2005, 4:00 PM 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 12:00Z, 11.0 hours before the alert went out and 165 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.
- Mixed-layer CAPE
- 1256 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 642 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -29 m²/s²
- 0-3 km storm-relative helicity
- 55 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGHW50 PHFO 012303 FFWHFO HIC003-020200- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE HONOLULU HI 100 PM HST SAT OCT 1 2005 THE NATIONAL WEATHER SERVICE IN HONOLULU HAS ISSUED A * FLASH FLOOD WARNING FOR... THE ISLAND OF OAHU IN HONOLULU COUNTY * UNTIL 400 PM HST * AT 1254 PM HST...RADAR SHOWED HEAVY RAIN OVER THE CENTRAL KOOLAU MOUNTAIN RANGE AND SURROUNDING AREAS * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WINDWARD OAHU BETWEEN KAAWA AND KANEOHE...CENTRAL AND SOUTHERN OAHU INCLUDING MILILANI...WAIMALU...AIEA...AND HALAWA MOVE TO HIGHER GROUND NOW. STAY AWAY FROM STREAMS AND LOW LYING AREAS PRONE TO FLOODING...ESPECIALLY STREAMS COMING DOWN FROM THE KOOLAU MOUNTAINS. THIS FLASH FLOOD WARNING REPLACES THE FLOOD ADVISORY THAT WAS IN EFFECT. 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. LAT...LON 2134 15789 2138 15775 2155 15784 2149 15798 $$
2 follow-up statements
000 WGHW70 PHFO 020015 FFSHFO FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE HONOLULU HI 215 PM HST SAT OCT 1 2005 HIC003-020200- HONOLULU- 215 PM HST SAT OCT 1 2005 ...A FLASH FLOOD WARNING CONTINUES UNTIL 400 PM HST FOR THE ISLAND OF OAHU IN HONOLULU COUNTY... AT 200 PM HST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED HEAVY RAINFALL CONTINUES TO FALL OVER PORTIONS OF OAHU. A THUNDERSTORM OVER THE KOOLAU MOUNTAINS ABOVE PEARL HARBOR WAS PRODUCING RAINFALL AT ESTIMATED RATES BETWEEN 3 AND 5 INCHES PER HOUR. HEAVY RAIN ALSO BRIEFLY REDUCED VISIBILITIES AT THE HONOLULU AIRPORT TO ONE MILE. WHILE THE STORMS AFFECTING THESE AREAS HAVE WEAKENED...HEAVY SHOWERS HAVE SINCE FORMED ELSEWHERE OVER THE KOOLAUS FROM WAIAWA TO KAHUKU. CONDITIONS REMAIN FAVORABLE FOR ADDITIONAL HEAVY SHOWERS TO DEVELOP ANYWHERE ON OAHU. STAY AWAY FROM STREAMS COMING DOWN FROM THE KOOLAUS...ESPECIALLY IF THUNDER IS HEARD. MOTORISTS SHOULD BE ALERT FOR FLOODING AND SHOULD NOT ATTEMPT TO CROSS FAST FLOWING OR RISING WATER. MANY FLASH FLOOD DEATHS OCCUR WHEN MOTORISTS TRY CROSSING FLOODED ROADWAYS. TURN AROUND...DON/T DROWN. LAT...LON 2134 15789 2138 15775 2155 15784 2149 15798 $$
000 WGHW70 PHFO 020114 FFSHFO FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE HONOLULU HI 315 PM HST SAT OCT 1 2005 HIC003-020130- HONOLULU- 315 PM HST SAT OCT 1 2005 ...THE FLASH FLOOD WARNING FOR THE ISLAND OF OAHU IN HONOLULU COUNTY IS CANCELLED... ...A FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL SUNDAY... WHILE HEAVY RAINFALL AND STREAM LEVELS HAVE SUBSIDED FOR NOW...CONDITIONS REMAIN CONDUCIVE FOR ADDITIONAL HEAVY RAIN DEVELOPMENT LATER. LAT...LON 2134 15789 2138 15775 2155 15784 2149 15798 $$
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 1, 10:00 AM HST, 3 hours earlier.
Area forecast discussion, Oct 1, 10:00 AM HST, 3 hours before
HAWAIIAN ISLANDS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HONOLULU HI 1000 AM HST SAT OCT 1 2005 .SYNOPSIS... TROPICAL MOISTURE AND A LOW ALOFT WILL PRODUCE VERY WET WEATHER OVER THE ISLANDS THROUGH SUNDAY. DRIER WEATHER WILL RETURN ON MONDAY AS THE TROPICAL MOISTURE AND THE LOW ALOFT MOVE AWAY TO THE WEST. TRADE-WIND WEATHER WILL CONTINUE THROUGH THE REST OF NEXT WEEK. && .SHORT TERM... A WEAK SURFACE TROUGH...ALL THAT REMAINS OF TROPICAL DEPRESSION KENNETH...IS SOUTHWEST OF KAUAI AND MOVING WEST. THIS SYSTEM IS NO LONGER HAVING MUCH INFLUENCE ON THE MAIN HAWAIIAN ISLANDS BUT IT HAS LEFT INCREASED MOISTURE AROUND THE ISLANDS AND HAS HELPED WEAKEN THE TRADE-WIND FLOW SINCE YESTERDAY. WITH ALL THE WEATHER AFFECTING THE MAIN HAWAIIAN ISLANDS RECENTLY...TRADE WINDS HAVE CONTINUED. A 1026MB SURFACE HIGH 820 MILES NORTH OF KAUAI NEAR 34N 162W IS MAINTAINING THE TRADES. OVER THE NEXT TWO DAYS...THE HIGH WILL SHIFT EASTWARD...ENDING UP NEAR 140W ON MONDAY MORNING. WATER VAPOR IMAGERY SHOWS A LOW ALOFT AT 26N 157W. A TROUGH EXTENDS FROM THE LOW TO A POINT JUST NORTH OF KAUAI. THE TROUGH IS ROTATING SOUTHEASTWARD AROUND THE SOUTH SIDE OF THE LOW. THE LOW IS FORECAST TO MOVE TOWARDS THE WEST NORTHWEST OVER THE NEXT 24 HOURS...THEN LIFT OUT TO THE NORTH. THE LOW ALOFT WILL KEEP THE ATMOSPHERE UNSTABLE OVER THE MAIN HAWAIIAN ISLANDS THROUGH SUNDAY WITH THE MOST INSTABILITY THIS AFTERNOON AS THE TROUGH ROTATING AROUND THE SOUTH SIDE OF THE LOW SWINGS OVER THE ISLANDS. SO FAR...WITH TRADE WINDS CONTINUING...MUCH OF THE HEAVY RAINFALL HAS BEEN CONCENTRATED OVER WINDWARD SLOPES. THE LOW ALOFT IS INDUCING LOW LEVEL TROUGHING OVER THE MAIN HAWAIIAN ISLANDS AND THAT IS WEAKENING THE TRADES. THAT WILL INCREASE THE POSSIBILITY OF HEAVY SHOWERS OVER LEEWARD AND INTERIOR SECTIONS THIS AFTERNOON. TOMORROW WITH EVEN WEAKER TRADES...THE THREAT OF HEAVY RAIN WILL BE GREATEST OVER INTERIOR AND LEEWARD AREAS IN THE AFTERNOON. && .LONG TERM... STARTING MONDAY...SURFACE HIGH PRESSURE NORTHEAST OF THE ISLANDS WILL BUILD SOUTHWESTWARD. THE PRESSURE GRADIENT OVER THE ISLANDS WILL INCREASE. TRADE WINDS WILL STRENGTHEN AND BECOME LOCALLY BREEZY BY THE MIDDLE OF NEXT WEEK. TRADE WIND WEATHER WILL CONTINUE THROUGH NEXT WEEK. && .MARINE... DATA FROM THE KAILUA BAY BUOY SHOW THAT THE SIZE AND PERIOD OF THE EAST SWELL HAVE BOTH DROPPED SINCE LAST NIGHT. WE WILL BE CANCELLING THE HIGH SURF ADVISORY AT 1000 AM. A NEW SOUTH SWELL WILL BE REACHING THE ISLANDS TUESDAY. THAT SWELL IS LIKELY TO PRODUCE SURF ABOVE THE ADVISORY LEVEL OF 8 FEET THROUGH FRIDAY. && .HFO WATCHES/WARNINGS/ADVISORIES... FLASH FLOOD WATCH FOR ALL ISLANDS THROUGH SUNDAY 6PM. && DONALDSON
The office that day
Everything else NWS Honolulu, HI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 1, 10:50 AM HST | Flash Flood Warning | HFO | Kalawao | 3 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.