Alert archive / Hawaii / Flash Flood Warnings in 2004
Flash Flood Warning 72, NWS Honolulu, HI
NWS Honolulu, HI issued this flash flood warning at Dec 26, 2004, 11:34 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
- Dec 26, 2004, 11:34 PM HST (09:34 UTC)
- Expired
- Dec 27, 2004, 2:30 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, 9.6 hours before the alert went out and 145 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
- 433 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 859 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 62 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGHW50 PHFO 270934 FFWHFO HIC003-271230- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE HONOLULU HI 1134 PM HST SUN DEC 26 2004 THE NATIONAL WEATHER SERVICE IN HONOLULU HAS ISSUED A * FLASH FLOOD WARNING FOR... THE ISLAND OF OAHU IN HONOLULU COUNTY * UNTIL 230 AM HST * AT 1134 PM HST...RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAINFALL OVER SOUTHWESTERN OAHU. THE THUNDERSTORMS WERE MOVING NORTH AT 15 MPH. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WAIANAE...KAPOLEI...MAKAKILO...MILILANI...WHEELER AFB... SCHOFIELD BARRACKS...WAHIAWA...EWA BEACH...AND WHITMORE VILLAGE. THIS FLASH FLOOD WARNING REPLACES THE URBAN AND SMALL STREAM FLOOD ADVISORY THAT WAS IN EFFECT. NEVER DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. IT ONLY TAKES A FEW INCHES OF WATER TO FLOAT MOST VEHICLES. LAT...LON 2124 15817 2124 15798 2159 15802 2148 15825 $$ R BALLARD
2 follow-up statements
000 WGHW70 PHFO 271123 FFSHFO FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE HONOLULU HI 125 AM HST MON DEC 27 2004 HIC003-271230- HONOLULU- 125 AM HST MON DEC 27 2004 ...A FLASH FLOOD WARNING CONTINUES UNTIL 230 AM HST FOR THE ISLAND OF OAHU IN HONOLULU COUNTY... LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO NANAKULI... WAIPIO...MAILI...WAIANAE...MILILANI TOWN...WHEELER AFB...SCHOFIELD BARRACKS...WAHIAWA AND WHITMORE VILLAGE. LAW ENFORCEMENT OFFICIALS REPORTED ELEVATED STREAM LEVELS AT KIPAPA GULCH AND WAIKAKALAUA STREAM BUT NO ROAD CLOSURES OR FLOODING. RADAR DATA INDICATED THAT THE HEAVIEST RAINFALL HAS MOVED OFF OAHU TOWARD THE NORTH. HOWEVER...ANOTHER BAND OF HEAVY RAINS IS DEVELOPING WEST OF OAHU AND STREAM LEVELS OVER CENTRAL AND WEST OAHU REMAIN ELEVATED. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. MOTORISTS SHOULD BE ALERT FOR FLOODING AND SHOULD NOT ATTEMPT TO CROSS FAST FLOWING OR RISING WATER. MANY FLASH FLOOD DEATHS OCCUR WHEN MOTORISTS TRY CROSSING FLOODED ROADWAYS. TURN AROUND...DON/T DROWN. ESCAPE RISING WATER BY CLIMBING DIRECTLY TO HIGHER GROUND. NEVER TRY TO OUTRACE A FLOOD...EITHER ON FOOT OR IN YOUR VEHICLE. DO NOT CAMP NEAR STREAMS OR OTHER AREAS SUBJECT TO FLOODING. LAT...LON 2124 15817 2124 15798 2159 15802 2148 15825 $$ KODAMA
000 WGHW70 PHFO 271219 FFSHFO FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE HONOLULU HI 220 AM HST MON DEC 27 2004 HIC003-271235- HONOLULU- 220 AM HST MON DEC 27 2004 ...THE FLASH FLOOD WARNING FOR THE ISLAND OF OAHU IN HONOLULU COUNTY IS CANCELLED... HEAVY RAIN HAS ENDED AND FLASH FLOODING IS NO LONGER EXPECTED. LAW ENFORCEMENT REPORTED NO SERIOUS FLOODING PROBLEMS AND ONLY LOCALIZED AREAS OF ROAD PONDING. LAT...LON 2124 15817 2124 15798 2159 15802 2148 15825 $$ 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 Dec 26, 9:08 PM HST, 2 hours 26 minutes earlier.
Area forecast discussion, Dec 26, 9:08 PM HST, 2 hours 26 minutes before
HAWAIIAN ISLANDS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HONOLULU HI 908 PM HST SUN DEC 26 2004 SYNOPSIS... A SLOW MOVING COLD FRONT WILL BRING WET WEATHER TO MAINLY THE SMALLER ISLANDS TONIGHT AND MONDAY. LINGERING MOISTURE OVER THE STATE...AND AN UPPER TROUGH TO OUR WEST...MAY KEEP THE WEATHER SOMEWAT UNSETTLED THROUGH MUCH OF THE WEEK. A STRONG COLD FRONT MAY BRING GUSTY KONA WINDS AND POSSIBLY STORMY WEATHER BY NEW YEARS EVE. && .UPDATE... HAVE UPDATED THE GRIDS TO PLACE THUNDERSTORMS IN THE FORECAST FOR OAHU AND PORTIONS OF MAUI COUNTY AS WELL. VIGOROUS SHORTWAVE ROTATING AROUND THE BASE OF THE UPPER TROUGH...ACCOMPANIED BY A 110 MILE WIDE BAND OF SHOWERS AND THUNDERSTORMS THAT IS PUSHING STEADILY EASTWARD. REMAINDER OF THE FORECAST IS UNCHANGED AND THE PREVIOUS DISCUSSION FROM 4 PM FOLLOWS. && .PREV DISCUSSION... THE GFS MODEL RUN KEEPS SHOWERS OVER KAUAI AND OAHU THROUGH MONDAY...AND SPREADS THEM TO THE OTHER ISLANDS TUESDAY AND WEDNESDAY. ANOTHER FRONT BRINGS IN MORE WIDESPREAD SHOWERS THURSDAY AND FRIDAY...ALONG WITH ENOUGH INSTABILITY TO ASSURE THE BIG ISLAND OF SOME THUNDERSTORMS AS WELL. AT THE MOMENT...SATELLITE IMAGERY A BAND OF HEAVY SHOWERS AND THUNDERSTORMS ALONG 160W. THIS BAND MARKS THE LEADING EDGE OF A COLD FRONT NORTH OF 20N...WITH CONVERGENCE OF TROPICAL MOISTURE SOUTH OF 20N. OTHER AREAS OF SCATTERED SHOWERS CAN BE SEEN OVER THE WATERS AROUND THE ISLANDS. THE SHOWERS AND THUNDERSTORMS OVER AND AROUND KAUAI WILL MOVE EAST TONIGHT...TO OAHU AT LEAST. A BROAD SURFACE RIDGE LIES OVER THE CENTRAL ISLANDS AND IS RESPONSIBLE FOR KEEPING GENERALLY EASTERLY TO SOUTHEAST WINDS OVER THE BIG ISLANDS...AND SOUTHEAST WINDS OVER THE STATE FROM MAUI TO OAHU. THE FRONT WEST OF KAUAI HAS TURNED WINDS THERE MORE SOUTHERLY. COMPUTER FORECAST MODELS BRING THIS FRONT TO KAUAI TONIGHT...THEN WEAKEN IT INTO A SURFACE TROUGH OVER THE WESTERN ISLANDS MONDAY AND TUESDAY. THUS AT LEAST THE ISLANDS OF KAUAI AND OAHU ARE IN STORE FOR SHOWERS...WITH CHANCE FOR A THUNDERSTORM AROUND KAUAI...THROUGH MONDAY. THESE MODELS ALSO BRING TROPICAL MOISTURE FROM SOUTH OF THE STATE UP OVER THE ISLANDS TUESDAY AND WEDNESDAY...THUS THE CHANCE FOR SHOWERS EXISTS ON ALL ISLANDS THROUGH MIDWEEK. THE NEXT LOW PRESSURE SYSTEM AND ITS ASSOCIATED FRONT IS FORECAST TO MAKE ITS PRESENCE KNOWN TO THE ISLANDS AS EARLY AS LATE WEDNESDAY BY TURNING WINDS SOUTHERLY STATEWIDE. THESE WINDS WILL INCREASE SIGNIFICANTLY AHEAD OF THIS COLD FRONT THURSDAY NIGHT AND FRIDAY... INTRODUCING THE LIKELIHOOD OF WIND ADVISORIES FOR THE NORMALLY WINDWARD SIDES OF THE ISLANDS...AND HIGH WIND WARNINGS FOR THE BIG ISLAND SUMMITS. THIS SYSTEM WILL ALSO BRING A MORE SIGNIFICANT POTENTIAL FOR HEAVY SHOWERS AND THUNDERSTORMS...ESPECIALLY NEAR THE BIG ISLAND...AS IT BRINGS INSTABILITY TO THE STATE NEW YEARS EVE. ANOTHER POWERFUL SYSTEM BEHIND THIS ONE WILL CONTINUE THE WINDS AND WET WEATHER ON NEW YEARS DAY...WITH AN UNUSUAL BOUT OF BRISK WESTERLY WINDS CONTINUING THROUGH THE END OF THE FORECAST PERIOD. && .HFO WATCHES/WARNINGS/ADVISORIES... NONE. && R BALLARD
In the hours before
Local storm report, Dec 26, 10:27 PM HST, 1 hour 7 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HONOLULU HI
1027 PM HST SUN DEC 26 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0900 PM HEAVY RAIN EWA BEACH 21.32N 158.01W
12/26/2004 0.40 INCH HONOLULU HI TRAINED SPOTTER
0.40 OF RAIN IN TEN MINTUES
1015 PM HEAVY RAIN KANEOHE 21.41N 157.79W
12/26/2004 0.30 INCH HONOLULU HI TRAINED SPOTTER
0.30 INCH OF RAIN IN 25 MINUTES
&&
RABNearby
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.