| Current Conditions | ||
| Temp |  | 7.3 C |
| RH | | 9 % |
| Wind | | NNE 17 mph |
| Road | | Open |
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Hawaiian Islands Synoptic Discussion and Guidance 923 FXHW60 PHFO 232014 AFDHFO AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE HONOLULU HI 1000 AM HST MON NOV 23 2009 .SYNOPSIS... A HIGH FAR TO THE NORTHEAST WILL MOVE EAST...AND THE TRADE WINDS WILL BE AT MODERATE LEVELS THROUGH TUESDAY. ANOTHER HIGH WILL PASS NORTH OF THE ISLANDS...RESULTING IN AN INCREASE IN THE TRADES LATE TUESDAY THROUGH THURSDAY. SHOWERS WILL FOCUS ON WINDWARD AND MAUKA SECTIONS. && .DISCUSSION... HIGHER PRESSURE TO THE NORTH AND LOWER PRESSURE TO THE SOUTH...PLUS THE EVER-PRESENT CORIOLIS EFFECT TURNING THE WINDS TO THE RIGHT... MEANS MORE TRADE WINDS THIS WEEK. THE TRADE WINDS WILL INCREASE A LITTLE TUESDAY NIGHT INTO THURSDAY WHEN AN EAST-MOVING HIGH PASSES TO OUR NORTH...TIGHTENING THE PRESSURE GRADIENT AS IT GOES. THE TRADES WILL RETURN TO LIGHT TO MODERATE THROUGH SATURDAY WHEN THE HIGH MOVES OFF TO THE NORTHEAST...THEN PICK UP AGAIN WHEN YET ANOTHER HIGH PASSES BY TO THE NORTH. A WEAKENING COLD FRONT MAY BRING SOME ORGANIZATION TO THE SHOWERS NEAR KAUAI THIS SUNDAY. OTHERWISE...SHOWERS WILL REMAIN RANDOM... FAVORING THE USUAL WINDWARD AND MAUKA SECTIONS WITH AN EXPOSURE TO THE EAST WINDS. THE ABSENCE OF A DESTABILIZING UPPER LEVEL TROUGH OR LOW MEANS THAT THERE IS LITTLE OR NO CHANCE OF SIGNIFICANT RAINFALL THIS WEEK. && .MARINE... SURF ALONG SELECT NORTH AND WEST FACING SHORES WILL DROP BELOW ADVISORY LEVELS TUESDAY THEN RISE ABRUPTLY TUESDAY NIGHT. THE SECOND ROUND OF SURF MAY REQUIRE A HIGH SURF WARNING FOR WAVES EXCEEDING 25 FEET WEDNESDAY. THE SWELL WILL SLOWLY DECREASE THEREAFTER. IT IS NOT OUT OF THE QUESTION FOR ADVISORY LEVEL SURF TO PERSIST THROUGH THE REMAINDER OF THE WEEK ALONG NORTH FACING SHORES. && .HFO WATCHES/WARNINGS/ADVISORIES... HIGH SURF ADVISORY UNTIL 6 AM HST TUESDAY FOR NORTH AND WEST SHORES OF NIIHAU AND KAUAI...AND NORTH SHORES OF OAHU MOLOKAI AND MAUI. && $$ CRAIG Bulletins, Forecasts and Observations are courtesy of Honolulu National Weather Service Forecast Office |
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