FXHW60 PHFO 100134
AFDHFO
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
334 PM HST SAT MAY 9 2009
.SYNOPSIS...
LIGHT TO MODERATE EASTERLY TRADE WINDS WILL CONTINUE THROUGH
SUNDAY. WINDS WILL DIMINISH MONDAY...AND REMAIN LIGHT FOR
MOST OF NEXT WEEK...AS A SURFACE RIDGE SITS JUST NORTH OF KAUAI.
JUST A FEW LIGHT SHOWERS WILL AFFECT WINDWARD AND MOUNTAIN
AREAS...MAINLY DURING NIGHTS AND MORNINGS. DAYTIME SEA BREEZES
WILL PRODUCE AFTERNOON CLOUDS...AND A SLIGHT CHANCE OF
SHOWERS...OVER LEEWARD AREAS.
&&
.DISCUSSION...
LIGHT TO MODERATE TRADE WINDS CONTINUE TODAY WITH WINDSPEEDS
RANGING FROM 5 TO 15 MPH AT MOST LOCATIONS. FLOW ACCELERATION IN
THE ALENUIHAHA CHANNEL AND OVER THE WATERS NEAR SOUTH POINT ARE
INCREASING WINDS TO 20 MPH. SHOWER ACTIVITY REMAINS SPARSE ACROSS
THE STATE THIS AFTERNOON.
A SURFACE HIGH FAR NE OF THE ISLANDS EXTENDS IT/S ASSOCIATED RIDGE
200 MILES TO THE NORTH OF KAUAI. THE PROXIMITY OF THE RIDGE IS
KEEPING HAWAII UNDER A RELAXED PRESSURE GRADIENT AND HENCEFORTH THE
LIGHT/MODERATE EASTERLY WINDS. THE RIDGE IS EXPECTED TO REMAIN IN
PLACE THROUGH THE WEEKEND AND INTO NEXT WEEK AS LOW PRESSURE FAR
TO NORTH KEEPS THE RIDGE IN PLACE. 
BY TUESDAY...A FRONTAL BOUNDARY IS FORECASTED TO PUSH THE RIDGE
EVEN FARTHER SOUTH...INTO A POSITION JUST N OF KAUAI. THIS FRONTAL
BOUNDARY WILL STALL...AND THE RIDGE WILL STALL ALONG WITH
IT...JUST N OF THE STATE. WITH THE RIDGE IN THIS POSITION...LARGE
SCALE WINDS NEAR AND SOUTH OF THE BIG ISLAND WILL BE LIGHT TO MODERATE
EASTERLY TRADES...WHILE WINDS NEAR KAUAI WILL BE LIGHT SOUTHEASTERLIES.
THIS SET-UP WILL ALLOW AFTERNOON SEA BREEZES AND OVERNIGHT LAND
BREEZES. CLOUDS AND SHOWERS WILL FAVOR INTERIOR AND LEEWARD AREAS
DURING AFTERNOONS AND EVENINGS...THOUGH THE LIGHT E FLOW COULD
BRING AN ISOLATED SHOWER TO WINDWARD AREAS NIGHTS AND MORNINGS.
MINIMAL TOTAL RAINFALL IS EXPECTED THROUGH THE FORECAST PERIOD AS MID
LEVEL RIDGING MAINTAINS STABLE CONDITIONS. 
VOLCANIC EMISSIONS...EMANATING FROM HALEMAUMAU AND PUU OO ON THE BIG 
ISLAND...ARE FORECAST TO REMAIN SOUTH OF THE SMALLER ISLANDS 
THROUGH SUNDAY...BUT THE CHANCE OF THIS HAZE SPREADING TO THE SMALLER
ISLANDS WILL INCREASE AGAIN AS THE RIDGE NEARS NEXT WEEK.
&&
.MARINE...
A LONG PERIOD SOUTH SWELL WILL CONTINUE TO PRODUCE 3 TO 5 FOOT
SURF ALONG SOUTH FACING SHORES BEFORE DIMINISHING SUNDAY NIGHT.
&&
.HFO WATCHES/WARNINGS/ADVISORIES...
NONE.
&&
$$
MORRISON