Alert archive / Hawaii / Flash Flood Warnings in 2004
Flash Flood Warning 52, NWS Honolulu, HI
NWS Honolulu, HI issued this flash flood warning at Aug 3, 2004, 6:43 AM HST for Hawaii 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, 6:43 AM HST (16:43 UTC)
- Expired
- Aug 3, 2004, 9:45 AM HST
- In force
- 3 hr
- Issued by
- NWS Honolulu, HI
- Area
- Counties, with a storm outline in the text
County Hawaii 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 12:00Z, 4.7 hours before the alert went out and 88 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
- 1035 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 639 m above ground
- 0-6 km bulk shear
- 1 kt
- 0-1 km storm-relative helicity
- -59 m²/s²
- 0-3 km storm-relative helicity
- -58 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 031649 FFWHFO HIC001-031945- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE HONOLULU HI 643 AM HST TUE AUG 3 2004 THE NATIONAL WEATHER SERVICE IN HONOLULU HAS ISSUED A * FLASH FLOOD WARNING FOR... THE NORTH AND SOUTH KONA DISTRICTS OF THE ISLAND OF HAWAII IN HAWAII COUNTY * UNTIL 945 AM HST * AT 630 AM HST...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH FLOODING FROM A STORM NEAR KAILUA KONA SOUTHWARD TO CAPTAIN COOK. EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF STREAMS...HIGHWAYS...AND LOW LYING AREAS. 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 1996 15576 1997 15602 1914 15600 1920 15563 $$
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 AM HST, 2 hours 43 minutes earlier.
Area forecast discussion, Aug 3, 4:00 AM HST, 2 hours 43 minutes before
HAWAIIAN ISLANDS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HONOLULU HI 400 AM HST TUE AUG 3 2004 .SYNOPSIS... A FLASH FLOOD WATCH REMAINS IN EFFECT TODAY FOR THE ENTIRE STATE. THE REMNANT LOW OF TROPICAL STORM DARBY...CENTERED 25 MILES EAST OF HANA...IS BRINGING HEAVY SHOWERS AND ISOLATED THUNDERSTORMS TO THE BIG ISLAND AND MAUI. EXPECT SHOWERS...WITH SOME ANCHORED HEAVY SHOWERS THAT MAY CAUSE FLASH FLOODING...TODAY...SPREADING WESTWARD TO THE OTHER ISLANDS. TRADE WINDS CONTINUE OVER THE SMALLER ISLANDS...BUT WILL BECOME VARIABLE AS THE LOW CONTINUES WESTWARD AT LESS THAN 10 MILES PER HOUR. && .DISCUSSION... EX-DARBY...APPARENTLY STILL A CLOSED SURFACE LOW...WAS ABOUT 25 MILES EAST OF HANA AT 200 AM THIS MORNING. A WIDE SHIELD OF DEEP TROPICAL MOISTURE...WITH EMBEDDED HEAVY SHOWERS AND ISOLATED THUNDERSTORMS SURROUNDS THIS CENTER AND WILL BE AFFECTING ALL THE MAIN HAWAIIAN ISLANDS TODAY INTO WEDNESDAY. HEAVY SHOWERS ARE OCCURRING MAINLY ON MAUI AND THE BIG ISLAND...AND A FLASH FLOOD WATCH IS IN EFFECT FOR THE ENTIRE STATE THROUGH 4 PM TODAY. HEAVY SHOWERS...SOME OF WHICH MAY BECOME ANCHORED...MAY PRODUCE FLASH FLOODING STATE-WIDE TODAY. A 1034 MB HIGH FAR NORTH OF THE STATE WILL KEEP TRADE WINDS OVER THE SMALLER ISLANDS TODAY...BUT WINDS WILL BE AFFECTED BY A WEAK CYCLONIC CIRCULATION AROUND A SURFACE LOW THAT REMAINS FROM TROPICAL STORM DARBY. WINDS ON THE BIG ISLAND OF HAWAII ARE ALREADY LIGHT SOUTHERLY DUE TO THE PROXIMITY OF THIS LOW. AN UPPER LEVEL TROUGH OF LOW PRESSURE JUST WEST OF KAUAI IS HELPING PRODUCE THE HEAVY SHOWERS BY DESTABILIZING THE WARM HUMID AIR WITHIN THE TROPICAL LOW CIRCULATION. THIS INSTABILITY IS EVIDENT ON BOTH THE LIHUE AND HILO SOUNDINGS. A K-INDEX OF 37...WITH A LIFTED INDEX OF -4.1 INDICATES A VERY UNSTABLE ATMOSPHERE OVER THE BIG ISLAND AND WITHIN THE CIRCULATION OF THE REMNANT LOW NEAR MAUI. MODELS ARE KEEPING WINDS SOUTHEASTERLY ON WEDNESDAY...AT THE REMNANT LOW MOVES BY KAUAI...AND THE HEAVY RAINS SHOULD BECOME MORE LIMITED... MAINLY TO KAUAI AND OAHU. BY THURSDAY OUR MORE NORMAL TRADE WINDS WILL RETURN...ALONG WITH DRIER AND MORE STABLE WEATHER. && .LONG TERM... WE ARE ALSO WATCHING ANOTHER AREA OF THREATENING WEATHER...TROPICAL DEPRESSION SIX-E...LESS THAN 1600 MILES EAST SOUTHEAST OF HILO. THE NATIONAL HURRICANE CENTER IN MIAMI HAS REDUCED THE CHANCES OF THIS SYSTEM DEVELOPING...BUT THE AVIATION MODEL IS STILL BRINGING A LARGE SLUG OF TROPICAL MOISTURE OVER THE STATE LATE FRIDAY INTO SATURDAY. THUS...HEAVY RAINFALL IS AGAIN A POSSIBLITY FOR THE COMING WEEKEND. && .HFO WATCHES/WARNINGS/ADVISORIES... FLASH FLOOD WATCH ALL ISLANDS. && FARRELL
The office that day
Everything else NWS Honolulu, HI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 7:29 PM HST | Flash Flood Warning | HFO | Hawaii | 3 hr |
| Aug 3, 4:40 AM HST | Flash Flood Warning | HFO | Hawaii | 3 hr |
| Aug 3, 9:32 AM HST | Flash Flood Warning | HFO | Hawaii | 3 hr |
| Aug 3, 11:27 AM HST | Flash Flood Warning | HFO | Kalawao | 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.