Alert archive / Hawaii / Flash Flood Warnings in 2004
Flash Flood Warning 67, NWS Honolulu, HI
NWS Honolulu, HI issued this flash flood warning at Oct 30, 2004, 6:31 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 30, 2004, 6:31 PM HST (04:31 UTC)
- Expired
- Oct 30, 2004, 9:30 PM HST
- In force
- 3 hr
- Issued by
- NWS Honolulu, HI
- Area
- Counties, with a storm outline in the text
County Honolulu County, HI
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, 4.5 hours before the alert went out and 175 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
- 694 J/kg
- Mixed-layer CIN
- -40 J/kg
- Mixed-layer LCL
- 882 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- -12 m²/s²
- 0-3 km storm-relative helicity
- 57 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGHW50 PHFO 310435 FFWHFO HIC003-310730- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE HONOLULU HI 631 PM HST SAT OCT 30 2004 THE NATIONAL WEATHER SERVICE IN HONOLULU HAS ISSUED A * FLASH FLOOD WARNING FOR... THE ISLAND OF OAHU ISLAND IN HONOLULU COUNTY * UNTIL 930 PM HST * AT 630 PM HST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A STORM OVER MAUNAWILI...IN HONOLULU... MOVING SOUTHWEST AT 10 MPH. * LOCATIONS IMPACTED INCLUDE... KANEOHE...MARINE CORPS BASE HAWAII...KAILUA...WAIMANALO...MANOA... THIS FLASH FLOOD WARNING REPLACES THE FLOOD ADVISORY THAT WAS IN EFFECT. EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF STREAMS AND COULD ALSO TRIGGER ROCK AND MUDSLIDES IN STEEP TERRAIN. EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF STREAMS...HIGHWAYS...UNDERPASSES AND LOW LYING AREAS. 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. STAY TUNED TO NOAA WEATHER RADIO OR OTHER LOCAL MEDIA SOURCES FOR THE LATEST SEVERE WEATHER INFORMATION. REPORT FLOODING TO THE POLICE FOR IMMEDIATE RELAY TO THE NATIONAL WEATHER SERVICE. LAT...LON 2131 15778 2142 15767 2151 15777 2140 15792 $$
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 30, 4:00 PM HST, 2 hours 31 minutes earlier.
Area forecast discussion, Oct 30, 4:00 PM HST, 2 hours 31 minutes before
HAWAIIAN ISLANDS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HONOLULU HI 4 PM HST SAT OCT 30 2004 .SYNOPSIS... A TROUGH WEST OF HAWAII WILL DECREASE THE TRADE WINDS AND TURN THEM MORE SOUTHEASTERLY SUNDAY AND MOST OF THE WORK WEEK. SHOWERS AND THUNDERSTORMS WILL BE MOST NUMEROUS OVER AND NEAR KAUAI...BECAUSE OF AN UPPER LEVEL LOW JUST NORTHWEST OF THE STATE. && .DISCUSSION... AN UPPER LOW JUST NORTHWEST OF THE ISLANDS CONTINUES TO SET OFF SHOWERS AND ISOLATED THUNDERSTORMS OVER AND AROUND KAUAI. MODELS KEEP THE LOW MORE OR LESS IN PLACE TONIGHT THEN MOVE IT SLOWLY TO THE NORTHWEST THEREAFTER. TEMPERATURES ALOFT ASSOCIATED WITH THE LOW WILL BE SLOW IN WARMING HOWEVER...SO THE ATMOSPHERE SHOULD REMAIN UNSTABLE THROUGH SUNDAY...ESPECIALLY OVER THE KAUAI END OF THE CHAIN. AN UPPER RIDGE IS FORECAST TO BUILD WESTWARD OVER THE STATE FROM MONDAY ONWARD...BRINGING WARMER TEMPERATURES ALOFT AND MORE STABLE CONDITIONS WITH IT. A NORTHEAST TO SOUTHWEST SURFACE TROUGH WELL WEST OF HAWAII NEAR THE DATELINE WILL MOVE TO THE EAST...ENDING UP WEST OF KAUAI NEAR 165W SUNDAY. THE TROUGH WILL ROUND OFF THE SOUTHWESTERN END OF A RIDGE NORTH OF HERE...AND PUSH THE WEAKENED RIDGE OVER THE ISLANDS BY TUESDAY. THE EASTERLY TRADES WILL SLACKEN AND VEER AROUND TO THE SOUTHEAST DURING THIS PROCESS. MODELS KEEP MOST OF THE PRECIPITATION ASSOCIATED WITH THE TROUGH WEST OF KAUAI...BUT WITH THE PREVAILING WINDS OUT OF THE SOUTHEAST...KAUAI AND PERHAPS OAHU WILL BE EXPOSED TO THE BIG ISLAND PLUME. PROGS KEEP THE TROUGH WEST OF KAUAI THROUGH THURSDAY THEN SLOWLY RE-ESTABLISH A RIDGE TO THE NORTH. THE FORECAST THEREFORE CALLS FOR MORE RAIN OVER KAUAI THAN ELSEWHERE ACROSS THE STATE THROUGH THURSDAY. && .HFO WATCHES/WARNINGS/ADVISORIES... HIGH SURF ADVISORY SOUTH FACING SHORES ALL ISLANDS CANCELED AT 4 PM. && CRAIG
The office that day
Everything else NWS Honolulu, HI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 30, 7:22 PM HST | Flash Flood Warning | HFO | Honolulu | 3 hr |
Nearby
Flash Flood Warnings in Hawaii, 2004Every flash flood warning in 2004
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.