Flash Flood Warning 65, NWS Honolulu, HI

Issued

Oct 27, 2004, 6:47 AM HST (16:47 UTC)

Expired

Oct 27, 2004, 9:45 AM HST

In force

3 hr

Issued by

NWS Honolulu, HI

Area

Counties, with a storm outline in the text

County Kauai County, HI

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.

000
WGHW50 PHFO 271651
FFWHFO
HIC007-271945-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HONOLULU HI
647 AM HST WED OCT 27 2004

THE NATIONAL WEATHER SERVICE IN HONOLULU HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE ISLAND OF KAUAI IN KAUAI COUNTY

* UNTIL 945 AM HST

* AT 639 AM HST...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED THE 
  CLOSURE OF THE HANALEI BRIDGE DUE TO FLOODING. HEAVY RAINFALL IN 
  THE MOUNTAINS IS ALSO LIKELY TO CAUSE FLOODING IN OTHER STREAMS 
  AND RIVERS ALONG THE NORTH AND EAST SIDE OF KAUAI. 

* LOCATIONS IMPACTED INCLUDE...
   HANALEI...PRINCEVILLE...KILAUEA....ANAHOLA...KAPAA AND WAILUA

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF STREAMS
AND COULD ALSO TRIGGER ROCK AND MUDSLIDES IN STEEP TERRAIN.

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 2203 15930 2216 15921 2228 15956 2213 15957

$$

BIRCHARD

NWS Honolulu, HI wrote its last area forecast discussion before this flash flood warning went out at Oct 27, 4:30 AM HST, 2 hours 17 minutes earlier.

HAWAIIAN ISLANDS FORECAST DISCUSSION...DELAYED
NATIONAL WEATHER SERVICE HONOLULU HI
430 AM HST WED OCT 27 2004

.SYNOPSIS...
THE THREAT OF FLOODING IS NOW FOCUSED ON THE ISLANDS OF KAUAI AND
OAHU THIS MORNING...THANKS TO THE CONTINUED DESTABILIZING INFLUENCE
OF A NEARBY UPPER LOW. TRADE WINDS ARE EXPECTED TO SPREAD WESTWARD
ACROSS HAWAIIAN WATERS THROUGH THE DAY TODAY...BRINGING LIGHTER
TRADE WIND SHOWERS TO WINDWARD AND MAUKA AREAS BY THURSDAY.

&&

.DISCUSSION...
THE UPPER LOW RESPONSIBLE FOR UNSETTLED WEATHER ACROSS HAWAIIAN
WATERS IS STILL WITH US...BUT THE THREAT OF FLASH FLOODING NOW
REACHES ONLY KAUAI AND OAHU. TRADE WINDS HAVE ALREADY RETURNED TO
THE BIG ISLAND AND MAUI COUNTY...REMOVING PLUMING AS A FLASH FLOOD
TRIGGER THERE. WHILE AFTERNOON THUNDERSTORMS ARE EXPECTED OVER
INTERIOR AREAS OF THE BIG ISLAND...THESE ARE NOT DEEMED TO BE A
FLASH FLOOD THREAT AT THIS TIME. THEREFORE...THE FLASH FLOOD WATCH
INCLUDES ONLY KAUAI AND OAHU UNTIL 4 PM HST.

THE OVERNIGHT HILO SOUNDING SHOWS THE FORMATION OF A TRADE WIND
INVERSION AT ABOUT 7100 FEET...WITH SLIGHTLY MORE STABLE INDICES.
THE ATMOSPHERE IS STILL RATHER MOIST THERE...WITH 1.67 INCHES OF
PRECIPITABLE WATER...SO THUNDERSTORMS MAY FORM ALONG THE SLOPES OF
THE BIG ISLAND THIS AFTERNOON...ESPECIALLY IF THE SUN COMES OUT AND
STAYS OUT TO PROVIDE HEATING.

TODAY WILL BE A DAY OF WEATHER TRANSITION AS THE UPPER LOW WEAKENS
AND MOVES AWAY AND WE SEE A GRADUAL 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
SURFACE 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 LATER
TODAY AND THURSDAY.

THE MOIST REMNANTS OF AN OLD FRONTAL BOUNDARY EMBEDDED IN THE TRADES
MAY REACH THE ISLANDS OVER THE WEEKEND. THERE IS ENOUGH CONFIDENCE
THAT THIS FEATURE WILL REACH US INTACT TO ALTER THE GRIDS FOR THE
CLOUDIER AND RAINIER SATURDAY THROUGH MONDAY.

&&

.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 KAUAI AND OAHU THROUGH 4 PM WEDNESDAY
&&

POWELL

Flash Flood Warnings in Hawaii, 2004Every flash flood warning in 2004

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.