Flash Flood Warning 15, NWS Honolulu, HI

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
913 PM HST TUE DEC 4 2007

CORRECTED HIGH SURF

.SYNOPSIS... POWERFUL FRONT BRINGING DAMAGING SOUTHWEST WINDS AND
PERIODS OF HEAVY RAINS TO THE ISLANDS. THE FRONT WILL PASS THROUGH
KAUAI THIS EVENING AND MOVE OVER OAHU EARLY WEDNESDAY MORNING...AND
REACH MAUI BY DAYBREAK.

&&

.DISCUSSION...
AS OF 8 PM...THE FRONT AND HEAVY RAINS ARE MOVING INTO KAUAI FROM
THE WEST AT 15 MPH. AHEAD OF THE FRONT...STRONG GUSTY SOUTHWEST
WINDS ARE BLOWING ACROSS THE ISLANDS PROMPTING A HIGH WIND WARNING
FOR THE ENTIRE STATE /NPWHFO/. SEE THE LATEST PUBLIC INFORMATION
STATEMENT /PNSHFO/ FOR THE LATEST IN WIND REPORTS AROUND THE
STATE. WITHIN THE FRONT ITSELF...WINDS WILL BE STRONGEST WITH THE
ADDITION OF HEAVY RAINS AND THUNDERSTORMS. BUT WITH THE FRONT
MOVING BRISKLY TO THE EAST...THE DURATION OF THESE CONDITIONS IN
ANY ONE SPOT SHOULD NOT LAST MORE THAN AN HOUR OR TWO. THE FRONT
IS EXPECTED TO REACH KAUAI BY 9 PM TONIGHT...OAHU AFTER
MIDNIGHT...AND MAUI COUNTY WEDNESDAY MORNING.

AHEAD OF THE FRONT FROM OAHU TO THE BIG ISLAND...SHOWERS ARE
MOVING RAPIDLY TOWARD THE NNE WITH INDIVIDUAL CELLS ESTIMATED TO
BE MOVING AT 40 MPH. THESE CELLS CONTAIN HEAVY RAINS BUT THEIR
RAPID MOVEMENT WILL CURTAIL ANY WIDESPREAD FLOODING AHEAD OF THE
FRONT.

THE CENTER OF THE LOW IS LOCATED 370 MILES NNW OF KAUAI AND IS
MOVING 10 MPH TOWARD THE SOUTHEAST. THE MOVEMENT HAS SLOWED
CONSIDERABLY OVER THE PAST 12 WHEN THE SYSTEM WAS MOVING CLOSE TO
30 MPH. THE LOW IS EXPECTED TO CONTINUE DECELERATING AND COME TO A
STOP ABOUT 300 MILES NORTH OF KAUAI BY WEDNESDAY NIGHT. WINDS WILL
RELAX ACROSS THE ISLANDS AT THIS POINT...BUT THE POTENTIAL FOR HEAVY
RAINS WILL CONTINUE. AS THE WINDS DIMINISH SO WILL STORM SPEEDS
AND THE CHANCE OF FLASH FLOODING WILL INCREASE. SEE THE FLASH
FLOOD WATCH FOR MORE INFORMATION /FFAHFO/. BANDS OF ORGANIZED
SHOWERS WILL PINWHEEL AROUND THE LOW AFFECTING PORTIONS OF THE
STATE AT DIFFERENT TIMES.

THE EVENTUAL REMOVAL AND WEAKENING OF THE LOW IS STILL EXPECTED
TO BEGIN SATURDAY...SOUTHERLY WINDS AND SHOWERS SHOULD EASE THEN
BEFORE COMPLETELY IMPROVING WITH THE RETURN OF FAIR TRADE WINDS ON
MONDAY.

&&

.MARINE...DECLINING NORTHWEST SWELLS WILL BE REINFORCED TOMORROW
WITH ANOTHER NORTHWEST SWELL THAT WILL REACH WARNING LEVELS ON
KAUAI WEDNESDAY... AND MAINTAIN THE ADVISORY FOR NORTHWEST SHORES
ACROSS THE REST OF THE STATE. ALSO...THE STRONG SOUTHWEST WINDS
WILL PRODUCE ROUGH SURF FOR THE SOUTH FACING SHORES OF THE SMALLER
ISLANDS WEDNESDAY...PROMPTING A HIGH SURF ADVISORY.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
HIGH WIND WARNING UNTIL 6 PM HST WEDNESDAY FOR ALL HAWAII ISLANDS.

FLASH FLOOD WATCH THROUGH THURSDAY AFTERNOON FOR ALL HAWAII ISLANDS.

HIGH SURF ADVISORY UNTIL 6 PM HST WEDNESDAY FOR SOUTH FACING SHORES.

HIGH SURF ADVISORY UNTIL 6 PM HST THURSDAY FOR NORTHWEST SHORES OF WAIANAE
COAST- OAHU NORTH SHORE-OAHU KOOLAU-OLOMANA-MOLOKAI-MAUI WINDWARD WEST-
MAUI CENTRAL VALLEY-WINDWARD HALEAKALA-BIG ISLAND NORTH AND EAST.

HIGH SURF WARNING UNTIL 6 PM HST THURSDAY FOR NIIHAU-KAUAI
WINDWARD-KAUAI LEEWARD.

SMALL CRAFT ADVISORY UNTIL 6 PM HST WEDNESDAY FOR OAHU LEEWARD
WATERS-MAUI COUNTY WINDWARD WATERS-MAUI COUNTY LEEWARD WATERS-
MAALAEA BAY-PAILOLO CHANNEL-ALENUIHAHA CHANNEL-BIG ISLAND
WINDWARD WATERS-BIG ISLAND LEEWARD WATERS-BIG ISLAND SOUTHEAST
WATERS.

GALE WARNING UNTIL 6 PM HST WEDNESDAY FOR KAUAI NORTHWEST WATERS-
KAUAI WINDWARD WATERS-KAUAI LEEWARD WATERS-KAUAI CHANNEL-OAHU
WINDWARD WATERS-KAIWI CHANNEL.

&&

MORRISON