Alert archive / Hawaii / Flash Flood Warnings in 2004
Flash Flood Warning 64, NWS Honolulu, HI
NWS Honolulu, HI issued this flash flood warning at Oct 27, 2004, 12:00 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 27, 2004, 12:00 AM HST (10:00 UTC)
- Expired
- Oct 27, 2004, 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, 10.0 hours before the alert went out and 152 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
- 739 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 1125 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGHW50 PHFO 271001 FFWHFO HIC003-271300- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE HONOLULU HI 1200 AM HST WED OCT 27 2004 THE NATIONAL WEATHER SERVICE IN HONOLULU HAS CONTINUED A * FLASH FLOOD WARNING FOR... THE ISLAND OF OAHU IN HONOLULU COUNTY * UNTIL 300 AM HST * AT 1153 PM HST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED FLASH FLOODING FROM A STORM OVER HAUULA...OR 21 MILES NORTH OF HONOLULU. THE STORM PRODUCING FLASH FLOODING WAS NEARLY STATIONARY. * LOCATIONS IMPACTED INCLUDE... WAIKANE...KAAAWA...HAUULA...LAIE...KAHUKU AND PUPUKEA. 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 2147 15793 2152 15779 2176 15796 2169 15809 $$
1 follow-up statement
000 WGHW70 PHFO 271255 FFSHFO HIC003-271300- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE HONOLULU HI 252 AM HST WED OCT 27 2004 ...THE FLASH FLOOD WARNING FOR NORTH CENTRAL HONOLULU COUNTY IS CANCELLED... MODERATE TO OCCASIONAL HEAVY RAINFALL IS STILL OBSERVED ON RADAR...BUT THE IMMEDIATE THREAT OF FLASH FLOODING ON OAHU HAS ENDED. HOWEVER...ADVISORIES AND WARNINGS MAY BE REISSUED FOR OAHU ON SHORT NOTICE...SO STAY ALERT. A FLASH FLOOD WATCH REMAINS IN EFFECT FOR ALL HAWAIIAN ISLANDS UNTIL 4 AM HST. STAY TUNED TO NOAA WEATHER RADIO OR OTHER LOCAL MEDIA SOURCES FOR THE LATEST SEVERE WEATHER INFORMATION. REPORT FLOODING TO THE POLICE FOR IMMEDIATE RELAY TO THE NATIONAL WEATHER SERVICE. LAT...LON 2147 15793 2152 15779 2176 15796 2169 15809 $$
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 26, 8:30 PM HST, 3 hours 30 minutes earlier.
Area forecast discussion, Oct 26, 8:30 PM HST, 3 hours 30 minutes before
HAWAIIAN ISLANDS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HONOLULU HI 830 PM HST TUE OCT 26 2004 .SYNOPSIS... THUNDERSTORMS CONTINUE TO FLARE OVER OAHU THIS EVENING...BUT THE UPPER LOW RESPONSIBLE FOR OUR UNSTABLE WEATHER IS WEAKENING. BOUTS OF HEAVY SHOWERS AND THUNDERSTORMS REMAIN POSSIBLE OVERNIGHT. TRADE WINDS ARE EXPECTED TO MOVE INTO THE AREA ON WEDNESDAY...BRINGING LIGHTER TRADE WIND SHOWERS TO WINDWARD AND MAUKA AREAS. && .DISCUSSION... WHILE DEEP CONVECTION ACROSS HAWAIIAN WATERS IS GENERALLY ON THE DECREASE THIS EVENING...RADAR SHOWS A FLAREUP OF THUNDERSTORMS ALONG NORTHEAST OAHU SLOPES...WITH 4 INCH PER HOUR RAINFALL RATES NOTED NEAR PUNALUU. THIS TYPE OF ACTIVITY IS POSSIBLE ANYWHERE ACROSS THE MAIN ISLANDS OVERNIGHT...GIVEN LINGERING INSTABILITY ASSOCIATED WITH AN UPPER LOW NEAR MOLOKAI. AFTERNOON SOUNDINGS SHOW MINUS 9 TEMPERATURES AT 500 MB LEVEL AT BOTH HILO AND LIHUE. SHOWERS AND THUNDERSTORMS TONIGHT WILL NOT BE AS WIDESPREAD AS THEY HAVE BEEN THE LAST COUPLE OF NIGHTS. HOWEVER RAINFALL AMOUNTS IN THE HEAVIER SHOWERS AND THUNDERSTORMS COULD STILL CAUSE LOCALIZED FLOODING. FOR THIS REASON...A FLASH FLOOD WATCH REMAINS IN EFFECT FOR ALL HAWAIIAN ISLANDS UNTIL WEDNESDAY MORNING. WEDNESDAY WILL BE A DAY OF WEATHER TRANSITION AS THE UPPER LOW WEAKENS AND MOVES AWAY AND WE SEE A CHANGE TO DRIER AND CLEARER WEATHER. MODELS CONTINUE TO BE IN GOOD AGREEMENT WITH THE WEATHER SCENARIO FOR THE NEXT SEVERAL DAYS. THE NORTH TO SOUTH ORIENTED TROUGH TO THE WEST OF THE ISLANDS IS EXPECTED TO WEAKEN AS IT MOVES TO THE WEST. DURING THIS TIME THE HIGH PRESSURE RIDGE TO THE NORTH WILL BUILD BACK IN...RETURNING TRADES TO THE ISLANDS. THE MOIST REMNANTS OF AN OLD FRONTAL BOUNDARY EMBEDDED IN THE TRADES MAY REACH THE ISLANDS OVER THE WEEKEND. IT IS UNCLEAR IF THIS FEATURE WILL IMPACT OUR WEATHER GIVEN THAT IT IS EXPECTED TO BREAK UP AS IT APPROACHES. && .MARINE... A SOUTH SWELL IS STILL ANTICIPATED TO ARRIVE ON THURSDAY WHICH COULD BRING SURF NEAR ADVISORY LEVELS OF 8 FEET FOR THE SOUTH SHORES. && .HFO WATCHES/WARNINGS/ADVISORIES... FLASH FLOOD WATCH FOR ALL HAWAIIAN ISLANDS THROUGH 4 AM WEDNESDAY && POWELL
In the hours before
Local storm report, Oct 26, 11:19 PM HST, 41 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HONOLULU HI
1119 PM HST TUE OCT 26 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0702 PM FLASH FLOOD KAHUKU 21.68N 157.95W
10/26/2004 HONOLULU HI LAW ENFORCEMENT
POLICE OFFICER REPORTS ANKLE DEEP WATER FLOWING ACROSS
KAMEHAMEHA HIGHWAY.
0800 PM FLASH FLOOD WAIKANE 21.50N 157.88W
10/26/2004 HONOLULU HI EMERGENCY MNGR
OAHU CIVIL DEFENSE REPORTS CLOSURE OF KAMEHAMEHA HIGHWAY
BRIDGE IN WAIKANE SHORTLY BEFORE 8 PM.
&&
POWELLThe office that day
Everything else NWS Honolulu, HI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 26, 6:49 PM HST | Flash Flood Warning | HFO | Honolulu | 3 hr |
| Oct 27, 6:47 AM HST | Flash Flood Warning | HFO | Kauai | 3 hr |
| Oct 27, 9:37 AM HST | Flash Flood Warning | HFO | Kauai | 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.