Area Forecast Discussion
Issued by NWS Honolulu, HI

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FXHW60 PHFO 200153
AFDHFO

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
353 PM HST SAT APR 19 2014

.SYNOPSIS...
TRADE WINDS WILL INCREASE SUNDAY BRINGING WINDY CONDITIONS THROUGH
MONDAY...BEFORE DROPPING TO MODERATE LEVELS TUESDAY. SHOWERS WILL
FOCUS OVER WINDWARD SLOPES WITH LEEWARD AREAS SEEING ISOLATED
SHOWERS.

&&

.DISCUSSION...

HIGH PRESSURE NORTH OF THE STATE CONTINUES TO BRING ISLAND TRADE
WINDS THIS EVENING... WHILE SHOWERS BRING CLOUDS AND LIGHT
RAINFALL TO THE WINDWARD SLOPES. TRADE WINDS WILL CONTINUE THROUGH
THE FORECAST PERIOD WITH AN UPTICK IN WINDS AND SHOWERS EXPECTED
TONIGHT THROUGH TUESDAY.

HIGH PRESSURE MOVING IN FROM THE WEST WILL BUILD NORTH OF HAWAII
TONIGHT AND SUNDAY. THE PRESSURE GRADIENT WILL TIGHTEN FROM N TO S
ACROSS THE AREA AS THE HIGH BUILDS...AND WINDS WILL INCREASE IN
RESPONSE. A WIND ADVISORY HAS BEEN ISSUED ACROSS PARTS OF OAHU...
MAUI COUNTY... AND THE BIG ISLAND AS THE INCREASING WINDS
ACCELERATE AROUND AND OVER THE ISLAND TERRAIN. TUESDAY...THE HIGH
WILL PUSH TOWARD THE EAST PACIFIC AS A WEAK FRONT MOVES ACROSS THE
DATELINE. WINDS OVER THE STATE WILL DECREASE TO MODERATE TRADES AS
THE HIGH MOVES INTO THE EAST PACIFIC FOR THE SECOND HALF OF THE
WEEK.

CURRENT PRECIPITABLE WATER VALUES ARE BELOW NORMAL NEAR THE
ISLANDS AND SHOWERS HAVE BEEN LIMITED. THE MIMIC PRECIP WATER
FIELD SHOWS AN INCREASE IN MOISTURE UPSTREAM OF THE ISLANDS NEAR
152W AND 23N. THIS MOISTURE IS EXPECTED TO INCREASE WINDWARD
SHOWERS TONIGHT THROUGH TUESDAY NIGHT AS THE MOISTURE MOVES ACROSS
THE AREA.

&&

.AVIATION...
TRADE WIND FLOW CONTINUES...RESULTING IN AIRMET TANGO FOR TURBULENCE
TO THE LEE OF THE ALL ISLANDS. TRADES ARE EXPECTED TO INCREASE THROUGH
THE WEEKEND...SO EXPECTING THE AIRMET TO CONTINUE.

CLOUDS AND SHOWERS BEING CARRIED IN ON THE TRADES WILL BRING MVFR
CONDITIONS MAINLY TO WINDWARD AND MAUKA AREAS FROM TIME TO
TIME...AND ISOLATED IFR CONDITIONS ARE POSSIBLE. OTHERWISE VFR
CONDITIONS ARE EXPECTED TO PREVAIL OVER LEEWARD AREAS.


&&

.MARINE...
THE SMALL CRAFT ADVISORY COVERS ALL HAWAIIAN COASTAL WATERS DUE TO
SEAS AND WINDS. WINDS WILL INCREASE FURTHER SUNDAY AS HIGH PRESSURE
BUILDS TO OUR NORTH...AND THE SCA EXTENDS THROUGH MONDAY. WINDS
MAY REACH NEAR GALE FORCE AT TIMES SUNDAY THROUGH MONDAY IN THE
ALENUIHAHA CHANNEL.

A SMALL TO MODERATE NORTHWEST SWELL WILL BUILD TONIGHT...THEN
DECLINE SUNDAY EVENING. ANOTHER MODERATE NORTHWEST SWELL IS
EXPECTED NEXT WEDNESDAY NIGHT AND WILL CONTINUE THROUGH THE END OF
NEXT WEEK. STRENGTHENING TRADE WINDS WILL PRODUCE SHORT
PERIOD...CHOPPY SURF ALONG EAST FACING SHORES...LIKELY REACHING
ADVISORY LEVELS LATE SUNDAY OR MONDAY.


&&

.HFO WATCHES/WARNINGS/ADVISORIES...
WIND ADVISORY FROM 6 AM SUNDAY TO 6 PM HST MONDAY FOR WAIANAE
COAST-OAHU KOOLAU-OLOMANA-WAIANAE MOUNTAINS-LANAI-KAHOOLAWE-MAUI
WINDWARD WEST-MAUI LEEWARD WEST-MAUI CENTRAL VALLEY-SOUTH BIG
ISLAND-BIG ISLAND NORTH AND EAST-KOHALA-BIG ISLAND INTERIOR.

SMALL CRAFT ADVISORY UNTIL 6 PM HST MONDAY FOR ALL HAWAIIAN
WATERS-


&&

$$

MORRISON...DISCUSSION/MARINE
M BALLARD...AVIATION





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