High Wind Watch 2, NWS Honolulu, HI

277 
WWHW70 PHFO 130654
NPWHFO

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE HONOLULU HI
854 PM HST TUE FEB 12 2013


HIZ028-130800-
/O.CAN.PHFO.HW.A.0002.000000T0000Z-130213T2000Z/
BIG ISLAND SUMMITS-
INCLUDING THE CITY OF...MAUNA LOA AND MAUNA KEA ABOVE 8000 FEET
854 PM HST TUE FEB 12 2013

...HIGH WIND WATCH IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN HONOLULU HAS CANCELLED THE HIGH
WIND WATCH. 

HIGH WIND WATCH IS CANCELED.


$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
800 PM HST TUE FEB 12 2013

.SYNOPSIS...
SURFACE HIGH PRESSURE FAR NORTH OF THE AREA WILL KEEP TRADE WINDS
BLOWING THROUGH THE MIDDLE OF NEXT WEEK. RIDGING ALOFT WILL KEEP
THE ATMOSPHERE STABLE...AND RAINFALL LIGHT...THROUGH THURSDAY.
THEN...TROUGHING ALOFT WILL SETTLE OVER THE ISLANDS RESULTING IN
AN INCREASINGLY WET TRADE WIND PATTERN OVER THE WEEKEND. ALSO...THE
TRADE WINDS WILL GRADUALLY STRENGTHEN STARTING THURSDAY NIGHT AS A
SURFACE HIGH PRESSURE SYSTEM BUILDS TO THE NORTH.

&&

.DISCUSSION...
THE TRADE WINDS WILL CONTINUE TO DOMINATE THE ISLAND SCENE WELL INTO
NEXT WEEK AS A RIDGE OF HIGH PRESSURE REMAINS NORTH OF THE ISLANDS.
A STABLE AIR MASS CURRENTLY LIES OVER THE ISLANDS WITH THE BASE OF
THE INVERSION AT 5000 FEET. SATELLITE IMAGERY SHOWS PLENTY OF LOW
STABLE STRATOCUMULUS CLOUDS COMING IN WITH THE TRADES. WEATHER RADAR
IS INDICATING SOME SCATTERED LIGHT SHOWERS/DRIZZLE FALLING FROM
THESE CLOUDS STATEWIDE. THESE CLOUDS AND SHOWERS ARE SPILLING
DOWNWIND FROM THE WINDWARD MOUNTAINS INTO THE LEEWARD COMMUNITIES OF
THE SMALLER ISLANDS. WE EXPECT THIS PATTERN TO HOLD INTO THURSDAY
NIGHT.

FROM FRIDAY ON AND INTO EARLY NEXT WEEK...WE EXPECT INCREASING TRADE
WIND SHOWER ACTIVITY. THIS CHANGE IS A RESULT OF THE A SERIES OF MID
LEVEL TROUGHS MOVING OVER THE ISLANDS. THE FIRST OF TWO TROUGHS WILL
SETTLE NEAR THE BIG ISLAND...SLIGHT DESTABILIZING THE AIR MASS OVER
THE ISLANDS. THE SECOND TROUGH...ARRIVING LATE IN THE WEEKEND...WILL
DEEPEN THE TROUGH ALREADY IN PLACE. AS A RESULT...WE MAY HAVE A WET
TRADE WIND PATTERN BY SUNDAY OR MONDAY. THE MODELS...BOTH ECMWF AND
GFS ARE SUGGESTING THIS INCREASE IN SHOWERS INITIALLY FAVORING
WINDWARD MAUI AND THE BIG ISLAND THEN SPREADING TO KAUAI SUNDAY.

AT THE SURFACE...THE RIDGE OF HIGH PRESSURE CURRENTLY 600 MILES
NORTH OF KAUAI WILL BE REPLACED BY TWO HIGHS CONSOLIDATING INTO ONE
LARGE...BROAD...HIGH NORTH OF THE ISLANDS SUNDAY EVENING WITH A
CENTRAL PRESSURE OF 1035 MB. THE MODELS ARE SUGGESTING MODERATE TO
STRONG TRADES AREA WIDE BY SUNDAY NIGHT. THIS HIGH IS SLATED TO
REMAIN STATIONARY AND AT THIS STRENGTH WELL INTO MID WEEK NEXT WEEK.

&&

.AVIATION...
WITH LITTLE OR NO CHANGE IN THE STRENGTH OF THE TRADES...AIRMET
TANGO WILL CONTINUE INTO WEDNESDAY...AND BEYOND...FOR TEMPO MODERATE
LOW-LEVEL TURBULENCE IN THE LEE OF THE MOUNTAINS ON ALL ISLANDS.
THIS CONDITION IS BEING ELEVATED BY THE STRONG LOW-LEVEL INVERSIONS.

&&

.MARINE...
A SMALL CRAFT ADVISORY...SCA...CONTINUES FOR THE WINDIER AREAS
AROUND MAUI AND THE BIG ISLAND. THE SCA WILL LIKELY BE EXPANDED
STARTING AROUND THURSDAY NIGHT AS HIGH PRESSURE STRENGTHENS TO OUR
NORTH. WE MAY HAVE GALES IN THE WINDIER ZONES AND SCA WINDS IN THE
REMAINDER OF THE COASTAL WATERS.

THE SERIES OF MODERATE SIZE NORTHWEST SWELLS WILL CONTINUE TO ROLL
IN. SURF FROM THESE SWELLS WILL REMAIN BELOW THE ADVISORY THRESHOLD
THROUGH THURSDAY. A LARGER NORTHWEST SWELL...ARRIVING FRIDAY MAY
BOOST THE SURF TO NEAR ADVISORY LEVEL ALONG NORTH AND WEST FACING
SHORES FRIDAY. ANOTHER LARGE REINFORCING NORTHWEST SWELL MAY BRING
THE SURF TO ADVISORY LEVELS ON SUNDAY. STRENGTHENING TRADE WINDS MAY
BOOST SURF NEAR THE ADVISORY LEVEL ALONG EAST FACING SHORES OVER THE
WEEKEND.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
SMALL CRAFT ADVISORY UNTIL 6 PM HST THURSDAY FOR THE PAILOLO AND
ALENUIHAHA CHANNELS...MAALAEA BAY AND WATERS SOUTH OF THE BIG ISLAND.

&&

LAU