Menu of Text Products for the Hawaiian Islands and the Tropical Pacific/Atlantic Oceans: Select a text product: Hawaiian Islands Synoptic Discussion and Guidance Hawaiian Islands 7-day Zone Forecast Flash Flood Statement Urgent Weather Message Special Marine Warning Terminal Aerodome Foreasts (TAFS) Area Forecast for Hawaii and Adjacent Coastal Waters AIRMETs for IFR Conditions, Turbulence, and Icing Hawaiian Islands Satellite Interpetation Message Oahu Surf Observation and Forecast/Coastal Forecast for Hawaiian Waters Offshore Forecast for Hawaiian Waters North Pacific High Seas Forecast Hawaiian Islands Automated Surface Observation System Hourly Weather Roundup Hawaiian Islands Wind Data Hawaiian Islands Rainfall Summary Daily Hawaii Cooperative Observations East Pacific Tropical Weather Outlook Narrow the Menu List Select Time Limit: 12 hours | 24 hours | 48 hours | 72 hours | No time limit Select Product Type: All | Routine Bulletins/FCSTS | Warnings/Watches/Advisories | HAWN Weather | Tropical | Marine | Aviation | Daily Obs | Special Hawaiian Islands Satellite Interpetation Message 376 ATHW40 PHFO 250025 SIMHI HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI 0030 UTC SAT MAY 25 2013 BASED ON DATA THROUGH 0000 UTC MAY 25 2013 WATER VAPOR LOOP...SHOWING FEATURES MAINLY ABOVE ABOUT 24000 FEET...DEPICTS AN UPPER TROUGH ORIENTED NORTHEAST TO SOUTHWEST ACROSS MUCH OF THE CENTRAL NORTH PACIFIC. WITH AN AXIS EXTENDING THROUGH 31N140W...24N160W AND 15N175W...THIS FEATURE JUST NORTH OF THE MAIN HAWAIIAN ISLANDS HAS LINGERED ACROSS THE AREA FOR THE PAST COUPLE OF DAYS. THE SOUTHERN FLANK OF THIS UPPER TROUGH IS MARKED BY A RAGGED AND THICKENING 300 MILE WIDE BAND OF BROKEN HIGH CLOUDS GENERALLY SOUTH OF A LINE FROM 22N158W TO 18N170W TO 13N180W. BROKEN TO OVERCAST LAYERED CLOUDS NORTH OF A LINE FROM 39N140W TO 37N160W TO 32N180W SIMULTANEOUSLY MARK THE NORTHERN FLANK OF THE UPPER TROUGH AND THE SOUTHERN EDGE OF A BROAD FRONTAL CLOUD BAND. THE MAIN SURFACE FEATURE ACROSS THE CENTRAL NORTH PACIFIC...AT LEAST SOUTH OF 40N...IS A BROAD ANTICYCLONIC CIRCULATION CENTERED NEAR 37N144W...FAR NORTHEAST OF THE MAIN HAWAIIAN ISLANDS. THIS CIRCULATION...ACTUALLY A SUBTROPICAL HIGH...HAS A RIDGE WHICH EXTENDS THROUGH 30N160W AND 22N180W...ALMOST DIRECTLY BENEATH THE UPPER TROUGH AXIS. LOW LEVEL FLOW IS GENERALLY EAST TO WEST SOUTH OF THE RIDGE AXIS...INCLUDING ACROSS THE MAIN HAWAIIAN ISLANDS. ISOLATED CUMULONIMBUS...CB...PERSIST WEST OF THE ISLANDS MAINLY FROM 20N TO 24N BETWEEN 164W AND 170W. CLOUD COVER ACROSS THE MAIN HAWAIIAN ISLANDS HAS INCREASED SINCE THIS MORNING...MAINLY ACROSS LEEWARD AREAS. THE TYPICAL TRADE WIND DISTRIBUTION OF GENEROUS LOW CLOUD COVER ACROSS WINDWARD AREAS CONTINUES AS WELL. KAUAI HAS SCATTERED TO PATCHY BROKEN LOW CLOUDS ACROSS MAUKA AREAS...WHILE OAHU HAS BROKEN LOW CLOUDS ACROSS THE KOOLAU AND WAIANAE SUMMITS. BROKEN LOW CLOUDS COVER THE EASTERN THIRD OF MOLOKAI...WITH THESE CLOUDS ALSO SPREADING WEST ALONG SOUTH-FACING MOLOKAI SHORES FROM TIME TO TIME. BROKEN LOW CLOUDS LINE SOUTH-FACING LANAI SHORES...WITH SOME OF THESE CLOUDS EXTENDING NORTHWARD ACROSS MAUKA SECTION OF THAT ISLAND AT IRREGULAR INTERVALS. MAUI HAS BROKEN TO OVERCAST LOW CLOUDS ACROSS ALL HALEAKALA SLOPES AND ACROSS THE WESTERN MOUNTAINS. OVERCAST LOW CLOUDS COVER BIG ISLAND WINDWARD SHORES AND SLOPES FROM LAUPAHOEHOE SOUTHWARD. ALL KAU AND KONA SLOPES SOUTH OF KAILUA-KONA HAVE BROKEN TO OVERCAST LOW CLOUDS. SATELLITE LOOP SHOWS LOW CLOUDS ARE MOVING WESTWARD ACROSS LOCAL HAWAIIAN WATERS AT ABOUT 20 MPH. $$ POWELL Bulletins, Forecasts and Observations are courtesy of Honolulu National Weather Service Forecast Office This page is maintained voluntarily by the MKWC and the UHMET faculty, staff, and students. It was last modified on: Tue, Sep 21 2010 - 2314 UTC Send comments to: Ryan Lyman