Alert archive / Hawaii / Flash Flood Warnings in 2004
Flash Flood Warning 68, NWS Honolulu, HI
NWS Honolulu, HI issued this flash flood warning at Oct 30, 2004, 7:22 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, 7:22 PM HST (05:22 UTC)
- Expired
- Oct 30, 2004, 10:15 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, 5.4 hours before the alert went out and 174 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 310529 FFWHFO HIC003-310815- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE HONOLULU HI 722 PM HST SAT OCT 30 2004 THE NATIONAL WEATHER SERVICE IN HONOLULU HAS ISSUED A * FLASH FLOOD WARNING FOR... THE ISLAND OF OAHU AMD HONOLULU COUNTY * UNTIL 1015 PM HST * AT 715 PM HST...A RAIN GAGE AT MANOA LYON ARBORETUM ON MANOA STREAM INDICATED RAINFALL AT A RATE OF 1.29 INCHES IN 15 MINUTES. THIS BRINGS THE 3 HOUR TOTAL AT THAT GAGE TO 4.65 INCHES WHICH HAS A RETURN PERIOD OF 14 YEARS. THIS RAINFALL IS FROM A STORM OVER THE KOOLAUS. MOVING SOUTH AT 10 MPH. OTHER HEAVY SHOWER CELLS ARE DEVELOPING AS THEY MOVE OVER THE KOOLAU MOUNTAINS. * LOCATIONS IMPACTED INCLUDE... WAIMANALO...KAILUA...MAUNAWILI...MANOA VALLEY...NUUANU VALLEY...KALIHI VALLEY... 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 2123 15777 2139 15768 2150 15787 2134 15802 $$ FARRELL
3 follow-up statements
000 WGHW70 PHFO 310605 FFSHFO HIC003-310815- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE HONOLULU HI 759 PM HST SAT OCT 30 2004 ...A FLASH FLOOD WARNING CONTINUES UNTIL 1015 PM HST FOR SOUTHEASTERN HONOLULU COUNTY... AT 754 PM HST...TRAINED WEATHER SPOTTERS REPORTED FLASH FLOODING IN MANOA VALLEY. THIS STORM WAS NEARLY STATIONARY. OTHER LOCATIONS IN THE WARNING INCLUDE FORT SHAFTER...HONOLULU... ALIAMANU...KANEOHE...MAUNAWILI...HALAWA AND AIEA. HEAVY RAIN CONTINUES TO FALL OVER PORTIONS OF THE WARNED AREA AND ADDITIONAL RAINFALL AMOUNTS OF 1 TO 3 INCHES ARE POSSIBLE. EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF STREAMS...HIGHWAYS...UNDERPASSES AND LOW LYING AREAS AND COULD ALSO TRIGGER ROCK AND MUDSLIDES IN STEEP TERRAIN. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. MOTORISTS SHUOLD BE ALERT FOR FLOODING AND SHOULD NOT ATTEMPT TO CROSS FAST FLOWING OR RISING WATER. MANY FLASH FLOOD DEATHS OCCUR WHEN MOTORISTS TRY CROSSING FLOODED ROADWAYS. TURN AROUND...DON/T DROWN ESCAPE RISING WATER BY CLIMBING DIRECTLY TO HIGHER GROUND. NEVER TRY TO OUTRACE A FLOOD...EITHER ON FOOT OR IN YOUR VEHICLE. DO NOT CAMP NEAR STREAMS OR OTHER AREAS SUBJECT TO FLOODING. STAY TUNED TO NOAA WEATHER RADIO OR OTHER LOCAL MEDIA SOURCES FOR THE LATEST SEVERE WEATHER INFORMATION. REPORT FLOODING TO THE POLICE FOR IMMEDIATE RELAY TO THE NATIONAL WEATHER SERVICE. LAT...LON 2123 15777 2139 15768 2150 15787 2134 15802 $$
000 WGHW70 PHFO 310640 FFSHFO HIC003-310815- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE HONOLULU HI 837 PM HST SAT OCT 30 2004 ...A FLASH FLOOD WARNING CONTINUES UNTIL 1015 PM HST FOR SOUTHEASTERN HONOLULU COUNTY... AT 830 PM HST...THE PUBLIC REPORTED MANOA STREAM OUT OF ITS BANKS AND FLOWING THROUGH THE UNIVERSITY OF HAWAII MANOA CAMPUS AND OTHER AREAS...INCLUDING THE BRIDGE NEAR MANOA MARKET PLACE...WHERE WATER WAS OVER THE BRIDGE. OTHER LOCATIONS IN THE WARNING INCLUDE MAUNAWILI...WAIMANALO... KAILUA...NIU VALLEY...KULIOUOU...WAIKIKI...KANEOHE...HONOLULU...FORT SHAFTER AND KAHALUU. RAINFALL HAS TAPERED OFF...WITH ADDITIONAL RAINFALL AMOUNTS OF UP TO AN INCH POSSIBLE IN THE WARNED AREA. EXCESSIVE RUNOFF FROM THIS STORM WILL CONTINUE TO CAUSE FLASH FLOODING OF STREAMS...HIGHWAYS...UNDERPASSES AND LOW LYING AREAS AND COULD ALSO TRIGGER ROCK AND MUDSLIDES IN STEEP TERRAIN. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. MOTORISTS SHUOLD 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 2123 15777 2139 15768 2150 15787 2134 15802 $$ FARRELL
000 WGHW70 PHFO 310705 FFSHFO HIC003-310815- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE HONOLULU HI 900 PM HST SAT OCT 30 2004 ...A FLASH FLOOD WARNING CONTINUES UNTIL 1015 PM HST FOR SOUTHEASTERN HONOLULU COUNTY... AT 845 PM HST...THE PUBLIC REPORTED FLOODING IN MANOA VALLEY WAS BEGINNING TO RECEDE. THE RAIN GAGE AT MANOA-LYON ARBORETUM HAS RECORDED 8.36 INCHES OF RAINFALL IN THE PAST 6 HOURS...NEARLY ALL OF THAT IN THE THREE HOURS ENDED AT 800 PM HST. MANOA STREAM IS STILL OUT OF ITS BANKS...WITH FLOODING REPORTED IN UPPER MANOA VALLEY...NEAR THE MANOA MARKET PLACE...AND ON THE UNIVERSITY OF HAWAII MANOA CAMPUS...WHERE WATER WAS OBSERVED AT LEAST TWO FEET DEEP ALONG CORREA ROAD OUTSIDE THE NATIONAL WEATHER SERVICE OFFICES. OTHER LOCATIONS IN THE WARNING INCLUDE FORT SHAFTER...HONOLULU... WAIKIKI...ALIAMANU...KANEOHE...MAUNAWILI...HALAWA AND AIEA. EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF STREAMS...HIGHWAYS...UNDERPASSES AND LOW LYING AREAS...AND COULD ALSO TRIGGER ROCK AND MUDSLIDES IN STEEP TERRAIN. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. MOTORISTS SHUOLD BE ALERT FOR FLOODING AND SHOULD NOT ATTEMPT TO CROSS FAST FLOWING OR RISING WATER. MANY FLASH FLOOD DEATHS OCCUR WHEN MOTORISTS TRY CROSSING FLOODED ROADWAYS. TURN AROUND...DON/T DROWN ESCAPE RISING WATER BY CLIMBING DIRECTLY TO HIGHER GROUND. NEVER TRY TO OUTRACE A FLOOD...EITHER ON FOOT OR IN YOUR VEHICLE. DO NOT CAMP NEAR STREAMS OR OTHER AREAS SUBJECT TO FLOODING. STAY TUNED TO NOAA WEATHER RADIO OR OTHER LOCAL MEDIA SOURCES FOR THE LATEST SEVERE WEATHER INFORMATION. REPORT FLOODING TO THE POLICE FOR IMMEDIATE RELAY TO THE NATIONAL WEATHER SERVICE. LAT...LON 2123 15777 2139 15768 2150 15787 2134 15802 $$ FARRELL
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, 3 hours 22 minutes earlier.
Area forecast discussion, Oct 30, 4:00 PM HST, 3 hours 22 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, 6:31 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.