| Current Conditions | ||
| Temp |  | 4.7 C |
| RH | | 23 % |
| Wind | | NW 0 mph |
| Road | | Open |
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Hawaiian Islands Synoptic Discussion and Guidance 595 FXHW60 PHFO 241331 AFDHFO AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE HONOLULU HI 330 AM HST FRI MAY 24 2013 .SYNOPSIS... TRADE WINDS WILL STRENGTHEN AND PREVAIL ACROSS THE MAIN HAWAIIAN ISLANDS...WITH PERIODS OF LOCALLY BREEZY CONDITIONS. SHOWERS WILL FAVOR WINDWARD AND MOUNTAIN AREAS. THE TRADE WIND PATTERN IS EXPECTED TO PREVAIL THROUGH EARLY NEXT WEEK. && .DISCUSSION... A BROAD SFC HIGH PRESSURE SYSTEM CENTERED FAR NE OF THE ALOHA STATE WILL KEEP TRADE WINDS ACROSS THE MAIN HAWAIIAN ISLANDS DURING THE NEXT SEVERAL DAYS. MEANWHILE...WV SATELLITE IMAGERY SHOWS AN UPPER LVL TROUGH FAR N OF THE ISLAND CHAIN...WHICH IS SLOWLY MIGRATING E AND ALLOWING FOR PRESSURE GRADIENTS ALOFT TO BECOME MORE RELAXED. WIND SPEEDS OVER THE BIG ISLAND SUMMITS ARE NOW BELOW ADVISORY LEVELS AND SHOULD REMAIN SO FOR THE REST OF THE FORECAST PERIOD. THEREFORE...THE WIND ADVISORY HAS BEEN CANCELLED. THE GLOBAL MODELS REMAIN IN FAIR AGREEMENT...SHOWING THE TROUGH ALOFT MIGRATING INTO THE EPAC AND ALLOWING FOR UPPER LVL RIDGING TO BUILD TO THE N/NW OF THE ISLANDS. AT THE SFC...THE HIGH WILL CONTINUE TO EXPAND ACROSS THE N CPAC AND BRINGING STRONGER TRADES THROUGH THE WEEKEND. LOCALLY BREEZY CONDITIONS WILL BEGIN DEVELOPING TODAY...AND CONTINUING THROUGH THE REST OF THE HOLIDAY WEEKEND AND INTO EARLY NEXT WEEK. AS THE TRADE WIND PATTERN ESTABLISHES ACROSS THE ISLANDS...THE FOCUS FOR SHOWER ACTIVITY WILL SHIFT TO WINDWARD AND MAUKA AREAS. LINGERING MOISTURE AND DAYTIME HEATING INSTABILITY WILL KEEP CHANCES FOR MORE ACTIVE TRADE SHOWERS TODAY AND TONIGHT. && .AVIATION... THE HAWAII TERMINALS WILL REMAIN MAINLY VFR WITH ISOLATED MVFR CEILINGS AND VIS OVER WINDWARD AREAS. AS THE TRADE WINDS STRENGTHEN...MODERATE LOW LEVEL TURBULENCE MAY DEVELOP TODAY AND REQUIRE AN AIRMET. && .MARINE... THE S SWELL WILL KEEP DECREASING WITH SURF ALONG S SHORES REMAINING BELOW ADVISORY LEVELS DURING THE NEXT SEVERAL DAYS. THE NW SWELL WILL GRADUALLY DIMINISH THROUGH THE WEEKEND. THE TRADES WILL REACH SMALL CRAFT ADVISORY LEVELS OVER THE WINDIER LOCATIONS NEAR MAUI COUNTY AND THE BIG ISLAND TODAY. THEREFORE...A SMALL CRAFT ADVISORY IS IN EFFECT FOR THOSE MARINE ZONES THROUGH SUNDAY. && .HFO WATCHES/WARNINGS/ADVISORIES... SMALL CRAFT ADVISORY UNTIL 6 AM HST SUNDAY FOR THE WINDIER WATERS AROUND MAUI COUNTY AND THE BIG ISLAND. && $$ DISCUSSION/MARINE...REYNES AVIATION...MORRISON Bulletins, Forecasts and Observations are courtesy of Honolulu National Weather Service Forecast Office |
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