Wind Advisory 27, NWS Honolulu, HI

000 
WWHW70 PHFO 051343
NPWHFO

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE HONOLULU HI
343 AM HST FRI DEC 5 2008

...STRONG NORTHEASTERLY WINDS WILL CONTINUE OVER THE BIG ISLAND
SUMMITS TODAY...

.THE PRESSURE GRADIENT BETWEEN A MIDDLE ATMOSPHERIC LOW EAST OF
THE BIG ISLAND AND A MID-LEVEL HIGH SOUTHWEST OF KAUAI WILL
CONTINUE TO PRODUCE STRONG NORTHEASTERLY WINDS OVER THE SUMMITS
OF MAUNA LOA AND MAUNA KEA ON THE BIG ISLAND TODAY. THESE STRONG
WINDS ARE EXPECTED TO GRADUALLY DECREASE BY THIS EVENING.

HIZ028-060245-
/O.CON.PHFO.WI.Y.0027.000000T0000Z-081206T0400Z/
BIG ISLAND SUMMITS-
343 AM HST FRI DEC 5 2008

...WIND ADVISORY REMAINS IN EFFECT UNTIL 6 PM HST THIS
AFTERNOON...

SUSTAINED WINDS FROM THE NORTHEAST OF 20 TO 30 MPH WITH LOCALLY
HIGHER GUSTS ARE EXPECTED TO CONTINUE TODAY.

A WIND ADVISORY MEANS THAT SUSTAINED WINDS OF AT LEAST 30 MPH ARE
EXPECTED. WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...
ESPECIALLY FOR HIGH PROFILE VEHICLES. THEREFORE...USE EXTRA
CAUTION WHILE DRIVING.

$$

HOUSTON

000 
WWHW70 PHFO 060335
NPWHFO

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE HONOLULU HI
535 PM HST FRI DEC 5 2008

HIZ028-060445-
/O.CAN.PHFO.WI.Y.0027.000000T0000Z-081206T0400Z/
BIG ISLAND SUMMITS-
535 PM HST FRI DEC 5 2008

...WIND ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN HONOLULU HAS CANCELLED THE WIND
ADVISORY. 

WINDS HAVE FALLEN BELOW THE WIND ADVISORY CRITERIA...AND ARE
EXPECTED TO FURTHER DROP OVERNIGHT. EXPECT NORTHEAST WINDS 15 TO
25 MPH OVERNIGHT.

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
1000 AM HST THU DEC 4 2008

.SYNOPSIS...
LIGHT TRADE WINDS WILL RETURN FOR A FEW DAYS. LOW PRESSURE SYSTEMS
OVER THE NORTH PACIFIC HOWEVER WILL WEAKEN THE SURFACE HIGH TO THE
NORTHEAST AND BRING THE RETURN OF SOUTHEAST WINDS EARLY SUNDAY. THE
INCREASING SOUTHERLY FLOW AND THE APPROACH OF A COLD FRONT MIGHT
BRING WETTER WEATHER TO KAUAI TUESDAY OR WEDNESDAY.

&&

.DISCUSSION...
SATELLITE IMAGERY SHOWS FEW CLOUDS AROUND THE SMALLER HAWAIIAN
ISLANDS THIS MORNING BUT SCATTERED SHOWERS ARE MOVING ONTO THE
WINDWARD BIG ISLAND. VARIABLE MOSTLY THIN HIGH CLOUDS WILL CONTINUE
MOVING ACROSS THE AREA THROUGH FRIDAY. AFTERNOON CLOUDS AND A FEW
INTERIOR AND ALSO WINDWARD AND MOUNTAIN SHOWERS ARE EXPECTED TODAY
SINCE TRADES ARE LIGHT. SHOWER ACTIVITY NOT APT TO BE SIGNIFICANT
SINCE TRADE WIND INVERSION PRESENT JUST BELOW 6000 FEET. THERE IS A
FRONT ASSOCIATED WITH THE LARGE LOW FAR NORTH. THE FRONT IS ABOUT
225 MILES NORTHWEST OF KAUAI...BUT NEARLY STATIONARY EXCEPT TO THE
NORTH OF THE MAIN HAWAIIAN ISLANDS AND NOT EXPECTED TO MOVE ONTO
THE ISLANDS.

THE SURFACE RIDGE WILL REMAIN JUST NORTHEAST WITH ONLY A WEAK HIGH
NORTH OF THE FRONT.  LIGHT TO MODERATE TRADES FORECAST ACROSS THE
FORECAST AREA THROUGH FRIDAY. TYPICAL LIGHT TRADE WIND SHOWERS
FRIDAY AND SATURDAY. WINDS WILL BE BRISK ACROSS THE SUMMITS TONIGHT
AND FRIDAY AS NORTHEAST FLOW AROUND AN UPPER TROUGH TO THE EAST OF
THE STATE INCREASES. LITTLE CHANGE FROM PREVIOUS FORECAST PACKAGE.

.PREV FORECAST DISCUSSION 4 AM...
MOISTURE WILL REMAIN SOMEWHAT LIMITED AS MID AND UPPER LEVEL
RIDGING NEARBY WILL KEEP A STABLE CAP ON DEEP CONVECTION...EXPECT
ONLY SCATTERED WINDWARD AND MAUKA SHOWERS AT THE MOST THROUGH THE
END OF THE WEEK. THE FLOW TURNS SOUTHEAST AGAIN THIS WEEKEND AS THE
RIDGE WEAKENS AND MOVES SOUTH NEAR THE ISLANDS. THIS PATTERN WILL
LIKELY INCREASE MOISTURE OVER THE AREA BY SUNDAY...WITH INCREASING
HUMIDITY AND SHOWERS.

THE LATEST EXTENDED PROGS ARE STILL AT ODDS FOR NEXT WEEK. THE 00Z
GFS SHOWS A WEAK COLD FRONT OR SHEAR LINE FEATURE MOVING PAST KAUAI
MONDAY NIGHT AND STALLING IN THE KAUAI CHANNEL TUESDAY. THE
REMNANTS OF THIS FRONT ARE ENERGIZED BY A PASSING SHORT WAVE WHICH
PRODUCES SIGNIFICANT SHOWERS FROM OAHU WESTWARD TUESDAY AND
WEDNESDAY. THE 00Z NOGAPS AND 06Z GFS ARE IN AGREEMENT BRINGING A
FRONT TO NEAR KAUAI TUESDAY...WHICH IS A LITTLE LESS AGGRESSIVE
THAN THE 00Z GFS PUSHING THE FRONT TO OAHU. THE 00Z ECM KEEPS THE
FRONTAL BOUNDARY WEST OF KAUAI THROUGH TUESDAY. EITHER WAY IT LOOKS
LIKE A BETTER CHANCE OF SHOWERS NEXT WEEK...ESPECIALLY ACROSS THE
WESTERN HALF OF THE STATE.

&&

.MARINE...
MORNING REPORTS INDICATED SURF WAS RUNNING AT ADVISORY LEVELS ON
NORTH AND WEST FACING SHORES OF KAUAI AND OAHU. THE WAIMEA BAY BUOY
REMAINED NEAR 8 FEET. BUOY 51001 NORTHWEST OF KAUAI ROSE DURING THE
NIGHT TO NEAR 14 FEET BUT WITH SOME ADDITIONAL INCREASE OF WAVE
ENERGY AT LONGER PERIODS. SURF WILL THEREFORE RISE THIS AFTERNOON
ALONG SHORES EXPOSED TO THIS WEST NORTHWEST SWELL. THIS SWELL WAS
CREATED WHEN A SECOND STORM MOVED UP AND COMBINED WITH A VERY LARGE
STORM LOCATED OVER THE CENTRAL NORTH PACIFIC ON MONDAY. HENCE WEST
FACING SHORES WILL EXPERIENCE SLIGHTLY MORE SWELL EXPOSURE THAN WITH
THE TYPICAL SWELLS ARRIVING FROM THE NORTHWEST. THIS SWELL SHOULD
ARRIVE THIS AFTERNOON PRODUCING SURF HEIGHTS NEAR THE 25 FOOT
WARNING CRITERIA ON NORTH SHORES OF KAUAI NIIHAU AND OAHU.

THE TWO STORM LOWS MERGED INTO A VERY LARGE LOW THAT MOVED UP TO THE
EASTERN ALEUTIAN ISLANDS TUESDAY CONTINUING TO PRODUCE A SWELL THAT
SHIFTED TO THE TYPICAL NORTHWESTERLY DIRECTION. WAVEWATCH FORECASTS
THIS NORTHWESTERLY SWELL TO BE AROUND 12 TO 14 FEET ARRIVING LATE
TONIGHT AND FRIDAY. WE EXPECT TO ISSUE A HIGH SURF ADVISORY OR
POSSIBLY WARNING FOR THE LEEWARD SIDE OF THE BIG ISLAND FOR SURF
ARRIVING TONIGHT. THERE IS THE POSSIBILITY OF UPGRADING NORTH AND
WEST FACING SHORES OF MOLOKAI AND NORTH SHORE OF MAUI TO HIGH SURF
WARNING.  LATEST NORTH PACIFIC SEA SURFACE ALTIMETER DERIVED WAVE
HEIGHTS FROM SATELLITE INDICATE SLIGHTLY LOWER THAN FORECAST WAVE
VALUES. ADVISORY AND WARNINGS FOR SURF WILL LIKELY BE EXTENDED TO
RUN THROUGH FRIDAY NIGHT AND DROP BELOW ADVISORY SOMETIME SATURDAY.

ALTHOUGH WAVE RUNUP ON SHORES TYPICALLY SUSCEPTIBLE TO BREAKING SURF
MAY OCCUR...THE HIGH TIDES ARE NOT AT THEIR MAXIMUM. SO DESPITE THE
CAUTION THAT SHOULD ALWAYS BE EXERCISED AROUND COASTS AFFECTED BY
HIGH SURF THE SHORELINE SURF EFFECTS WILL PROBABLY BE NO MORE THAN
NORMALLY EXPERIENCED WITH A LARGE SWELL.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
HIGH SURF ADVISORY UNTIL 6 PM HST FRIDAY FOR MOLOKAI-MAUI
WINDWARD WEST-MAUI CENTRAL VALLEY-WINDWARD HALEAKALA.

HIGH SURF WARNING UNTIL 6 PM HST FRIDAY FOR NIIHAU-KAUAI
WINDWARD-KAUAI LEEWARD-WAIANAE COAST-OAHU NORTH SHORE-OAHU
KOOLAU.

SMALL CRAFT ADVISORY UNTIL 6 AM HST SATURDAY FOR KAUAI NORTHWEST
WATERS-KAUAI WINDWARD WATERS-KAUAI LEEWARD WATERS-KAUAI CHANNEL-
OAHU WINDWARD WATERS-KAIWI CHANNEL-MAUI COUNTY WINDWARD WATERS.

&&

HOAG