Alert archive / Hawaii / Flash Flood Warnings in 2004
Flash Flood Warning 56, NWS Honolulu, HI
NWS Honolulu, HI issued this flash flood warning at Aug 3, 2004, 7:11 PM HST for Kalawao 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
- Aug 3, 2004, 7:11 PM HST (05:11 UTC)
- Expired
- Aug 3, 2004, 10:15 PM HST
- In force
- 3 hr
- Issued by
- NWS Honolulu, HI
- Area
- Counties, with a storm outline in the text
County Kalawao 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
Hilo, (PITO), launched 00:00Z, 5.2 hours before the alert went out and 164 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
- 724 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 561 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- 45 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 040515 FFWHFO HIC009-040815- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE HONOLULU HI 711 PM HST TUE AUG 3 2004 THE NATIONAL WEATHER SERVICE IN HONOLULU HAS ISSUED A * FLASH FLOOD WARNING FOR... THE ISLAND OF MAUI IN MAUI COUNTY * UNTIL 1015 PM HST * AT 705 PM HST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A STORM 6 MILES SOUTHWEST OF HANA...OR 25 MILES SOUTHEAST OF KAHULUI. THE STORM PRODUCING HEAVY RAINS WAS NEARLY STATIONARY. * LOCATIONS IMPACTED INCLUDE KIPAHULU...HAMOA...KAUPO...HANA AND NAHIKU. EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF STREAMS 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 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 2066 15632 2056 15625 2072 15590 2089 15607 $$ KODAMA
1 follow-up statement
000 WGHW70 PHFO 040809 FFSHFO HIC009-040815- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE HONOLULU HI 1010 PM HST TUE AUG 3 2004 ...THE FLASH FLOOD WARNING FOR THE ISLAND OF MAUI IN MAUI COUNTY WILL BE ALLOWED TO EXPIRE... A FLASH FLOOD WATCH REMAINS IN EFFECT FOR MAUI COUNTY UNTIL 600 AM HST WEDNESDAY. HEAVY RAINS OVER THE SOUTHEASTERN SLOPE OF HALEAKALA HAVE DIMINISHED FOR NOW. HOWEVER...THE AIRMASS REMAINS POISED FOR ADDITIONAL HEAVY RAINS. RADAR DATA INDICATED ONE HOUR RAIN RATES FROM 4 TO 6 INCHES OVER THE SLOPES OF HALEAKALA NEAR KAUPO AND KIPAHULU. LAT...LON 2066 15632 2056 15625 2072 15590 2089 15607 $$ KODAMA
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 Aug 3, 4:00 PM HST, 3 hours 11 minutes earlier.
Area forecast discussion, Aug 3, 4:00 PM HST, 3 hours 11 minutes before
HAWAIIAN ISLANDS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HONOLULU HI 400 PM HST TUE AUG 3 2004 .SYNOPSIS... THE REMNANTS OF DARBY WILL CONTINUE TO AFFECT THE ISLANDS THROUGH WEDNESDAY AS IT MAKES ITS WESTWARD JOURNEY ACROSS THE ISLANDS. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS CAN BE EXPECTED. MORE TYPICAL TRADE WIND WEATHER CAN BE EXPECTED THURSDAY AND FRIDAY AS SHOWERS BECOME MORE ISOLATED MAINLY OVER WINDWARD AND MAUKA AREAS. && .DISCUSSION... SHOWERS AND ISOLATED THUNDERSTORMS CONTINUE TO AFFECT THE ISLANDS THIS AFTERNOON AS THE REMNANT MOISTURE OF DARBY INTERACTS WITH AN UNSTABLE ATMOSPHERE IN PLACE OVER THE ISLANDS. THE INSTABILITY IS DUE TO AN UPPER LEVEL TROUGH JUST NORTHWEST OF KAUAI. THE THUNDERSTORMS HAD BEEN AFFECTING MAINLY THE BIG ISLAND THIS MORNING BUT HAVE SHIFTED OVER TO MAUI COUNTY THIS AFTERNOON. THE REST OF THE STATE MAY SEE MORE OF THE ACTIVITY TONIGHT. SHOWERY WEATHER LIKELY LINGER INTO WEDNESDAY ESPECIALLY OVER THE WESTERN END OF THE MAIN ISLAND CHAIN SINCE THE MOISTURE FIELD IS ONLY MOVING GRADUALLY WESTWARD. WINDS ARE BASICALLY LIGHT TRADES ACROSS THE STATE BUT THE REMNANT LOW AND ASSOCIATED THUNDERSTORMS IS CAUSING SOME VARIABILITY IN WIND DIRECTION AND SPEEDS ESPECIALLY AROUND MAUI COUNTY AND THE BIG ISLAND. BY THURSDAY AND FRIDAY MORE TYPICAL TRADE WIND WEATHER IS EXPECTED THANKS TO HIGH PRESSURE FAR NORTH OF THE STATE. TRADE WINDS WILL BE IN THE 10 TO 20 MPH RANGE WITH SHOWERS MAINLY CONFINED TO WINDWARD AND MAUKA AREAS. && .LONG TERM... WE ARE ALSO WATCHING ANOTHER AREA OF SHOWERY WEATHER THAT MAY APPROACH THE ISLANDS OVER THE WEEKEND. TROPICAL DEPRESSION SIX-E IS LOCATED ABOUT 1500 MILES EAST SOUTHEAST OF HONOLULU. THE NATIONAL HURRICANE CENTER IN MIAMI HAS ISSUED ITS LAST ADVISORY ON THIS SYSTEM BUT THE GFS AND NOGAPS MODELS STILL BRING A LARGE AREA OF REMNANT TROPICAL MOISTURE OVER THE STATE LATE FRIDAY INTO SATURDAY BRINGING THE THREAT OF HEAVY RAINFALL ONCE AGAIN TO THE STATE. && .HFO WATCHES/WARNINGS/ADVISORIES... FLASH FLOOD WARNING SOUTHEAST MAUI. HIGH SURF ADVISORY EAST SHORES OF KAUAI OAHU MOLOKAI MAUI AND THE BIG ISLAND. FLASH FLOOD WATCH ALL ISLANDS. && BURKE
The office that day
Everything else NWS Honolulu, HI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 2:20 PM HST | Flash Flood Warning | HFO | Kalawao | 3 hr |
| Aug 4, 3:45 AM HST | Flash Flood Warning | HFO | Honolulu | 3 hr |
| Aug 4, 6:45 AM HST | Flash Flood Warning | HFO | Honolulu | 3 hr |
| Aug 4, 9:32 AM HST | Flash Flood Warning | HFO | Honolulu | 3 hr |
| Aug 4, 10:45 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.