High Surf in Hawaii, June 24 to 28, 2009

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
330 AM HST WED JUN 24 2009

.SYNOPSIS...
A HIGH FAR NORTH OF THE ISLANDS WILL MOVE NORTHEAST SLOWLY OVER THE
NEXT SEVERAL DAYS. THE HIGH WILL KEEP LOCALLY BREEZY TRADE WINDS
BLOWING THROUGH TODAY WITH MODERATE TRADES EXPECTED THROUGH THE
WEEKEND. SHOWERS WILL BE MOST FREQUENT OVER WINDWARD AREAS...BUT A
FEW SHOWERS WILL SPREAD LEEWARD ON THE SMALLER ISLANDS AND AFTERNOON
SHOWERS WILL FORM OVER THE KONA SLOPES.

&&

.DISCUSSION...
A SURFACE HIGH AND RIDGE ALOFT REMAIN FAR NORTH NORTHEAST OF THE
STATE BRINGING DEEP LAYER EASTERLY FLOW TO THE ISLANDS. THE TRADES
REMAIN BLUSTERY WITH GUSTS AROUND 30 MPH IN THE WINDIER LOCATIONS.
PASSING TRADE SHOWERS ARE AFFECTING MAINLY WINDWARD LOCATIONS WITH
OVERNIGHT ACCUMULATIONS UP TO 0.25 OF AN INCH AT THE AUTOMATED
GAGES. A FEW SHOWERS ARE MAKING IT ACROSS TO THE LEEWARD LOCATIONS
AS WELL WITH LESS THAN 0.10 OF AN INCH REPORTED.  BANDS OF CLOUDS
AND SHOWERS REMAIN FAR UPSTREAM OF THE ISLANDS WITH NO APPARENT
BREAK IN SIGHT FOR TODAY.

THE HIGH AND RIDGE ALOFT ARE EXPECTED TO MOVE SLOWLY TO THE
NORTHEAST OVER THE NEXT FEW DAYS LEAVING BEHIND A WEAK RIDGE AXIS
TO THE FAR NORTH OF THE STATE. THIS PATTERN WILL EASE THE TRADES
WINDS TO MODERATE LEVELS FOR OUR AREA FOR THE LAST HALF OF THE WEEK.
AN UPPER LEVEL TROUGH LOCATED SOUTHEAST OF THE STATE WILL DRIFT
OVER THE ISLANDS THURSDAY THROUGH SATURDAY...THEN LIFT NORTH OF THE
STATE BY SUNDAY. AS THE TROUGH MOVES ACROSS THE ISLANDS...SOME
INCREASE IN THE DEPTH OF THE UNSTABLE LAYER IS ANTICIPATED TO BRING
HEAVIER TRADE SHOWERS TO MAINLY WINDWARD AND MAUKA LOCATIONS. DURING
THIS TIME PERIOD...THE TRADES WILL STILL BE MODERATE WHICH WILL KEEP
AWAY SEABREEZE DEVELOPMENT IN ALL BUT THE MOST SHELTERED LOCATIONS
SUCH AS ALONG THE KONA COAST WHERE LOCALLY HEAVY AFTERNOON SHOWERS
ARE A DISTINCT POSSIBILITY.

THE MODEL GUIDANCE SHOWS MODERATE TRADES WILL CONTINUE INTO EARLY
NEXT WEEK AS A WEAK RIDGE AXIS REMAINS POSITIONED WELL NORTH OF THE
STATE.

&&

.MARINE...
A SMALL CRAFT ADVISORY...SCA...REMAINS IN EFFECT FOR THE MAJOR
CHANNELS AND OTHER WINDIER AREAS OF THE COASTAL WATERS DUE TO
STRONG TRADE WINDS. THE STRONG TRADES ARE PRODUCING SEAS ABOVE 10 FT
IN SOME AREAS. THE SCA WILL REMAIN UP FOR THESE AREAS THROUGH
TODAY. THE SCA WILL THEN CONTINUE FOR MAALAEA BAY...WATERS SOUTH
OF THE BIG ISLAND AND THE PAILOLO AND ALENUIHAHA CHANNELS TONIGHT
THROUGH THURSDAY.

A SOUTH SWELL WILL GRADUALLY INCREASE OVER THE NEXT FEW
DAYS...PEAKING FRIDAY NIGHT...THEN GRADUALLY DECREASE THROUGH EARLY
NEXT WEEK. THIS SWELL MAY PRODUCE SURF ABOVE THE ADVISORY THRESHOLD
TONIGHT THROUGH SATURDAY NIGHT.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...

SMALL CRAFT ADVISORY UNTIL 6 AM HST THURSDAY FOR MAALAEA BAY-PAILOLO
CHANNEL-ALENUIHAHA CHANNEL-BIG ISLAND LEEWARD WATERS-BIG ISLAND
SOUTHEAST WATERS.

SMALL CRAFT ADVISORY UNTIL 6 PM HST TODAY FOR KAUAI CHANNEL-
KAIWI CHANNEL.

&&

BRENCHLEY