An upper trough north of the isles caused strong southwest to west winds on the summits of Mauna Kea and Mauna Loa on the Big Island of Hawaii. There were no reports of serious property damage or injuries.
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The episode as NWS HFO wrote it up.
An upper trough north of the isles caused strong southwest to west winds on the summits of Mauna Kea and Mauna Loa on the Big Island of Hawaii. There were no reports of serious property damage or injuries.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Honolulu, HI wrote its last area forecast discussion before the first event at Apr 1, 4:00 AM HST, 0 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE HONOLULU HI 400 AM HST SUN APR 1 2007 .SYNOPSIS...HIGH PRESSURE MOVING IN FROM THE NORTHWEST WILL PRODUCE A BRIEF PERIOD OF LIGHT TO MODERATE NORTHEAST TRADES THROUGH MONDAY. A HIGH PRESSURE RIDGE WILL MOVE IN OVER OR JUST NORTH OF THE ISLANDS BY WEDNESDAY...FOR A RETURN TO LIGHT WINDS...DAYTIME SEA BREEZES AND NIGHTTIME LAND BREEZES. && .DISCUSSION... WEATHER RADARS PAINT A RATHER BUSY PICTURE THIS MORNING ACROSS THE WESTERN HALF OF THE MAIN HAWAIIAN ISLANDS. THE MOST ORGANIZED FEATURE IS A LINE OF SHOWERS CURRENTLY OVER KAUAI. THIS LINE OF SHOWERS MARKS THE WIND SURGE ASSOCIATED WITH THE INCOMING NORTH TO NORTHEAST WINDS. THE ANAHOLA GAGE PICKED UP OVER HALF AN INCH BETWEEN 315 AND 345 THIS MORNING. TO THE SOUTH OF KAUAI AND WEST OF OAHU...THERE ARE SCATTERED RADAR ECHOS THAT ARE MOVING TOWARD THE EAST. THESE ECHOS ARE AT MID LEVELS OF THE ATMOSPHERE AND THE MOTION AGREES WITH MID LEVEL WESTERLY WINDS SHOWN BY RADAR AND THE LIHUE SOUNDING. WHATS UNCLEAR IS HOW MUCH OF THIS PRECIPITATION IS ACTUALLY REACHING THE SURFACE. THE LIHUE SOUNDING INDICATES A FAIR AMOUNT OF MOISTURE BELOW 8 THOUSAND FEET...ELIMINATING EVAPORATION AS A HUGE FACTOR...THUS SOME OF THE SHOWERS MUST BE HITTING THE OCEAN. FINALLY...THERE ARE A FEW ECHOS SOUTH OF OAHU THAT HAVE REMAINED NEARLY STATIONARY OVER THE PAST 2 TO 3 HOURS. THESE ECHOS DO NOT CORRELATE WELL TO SATELLITE IMAGERY...SO AM NOT COMPLETELY SURE WHAT IS PRODUCING THE RETURNS. THE HAWAIIAN ISLANDS LIE CURRENTLY WITHIN A TRANSITION ZONE BETWEEN HIGH PRESSURE TO THE NORTHWEST...A DISSIPATING SURFACE TROUGH TO THE EAST...AND A SECOND SURFACE TROUGH TO OUR NORTH. THE SURFACE TROUGH TO OUR EAST...RESPONSIBLE FOR KEEPING WINDS GENERALLY LIGHT ACROSS THE STATE FOR THE PAST FEW DAYS...APPEARS TO HAVE FINALLY STARTED DRIFTING AWAY FROM THE ISLANDS. THE TROUGH NORTH OF THE ISLANDS HAS SINCE BECOME THE MORE DOMINANT OF THE TWO...BUT WILL FOLLOW ITS PREDECESSORS PATH AND MOVE EASTWARD. IN THEIR PLACE...NORTHERLY WINDS ASSOCIATED WITH HIGH PRESSURE FAR NORTHWEST OF KAUAI WILL FILL IN ACROSS KAUAI THROUGH MAUI TODAY. THE WINDS WILL BE STRONG ENOUGH TO PREVENT WIDESPREAD SEA BREEZE DEVELOPMENT...THOUGH LOCAL SEA BREEZES WILL STILL OCCUR ACROSS WIND SHELTERED LEE AREAS. THE NORTHEAST WINDS WILL NOT REACH THE BIG ISLAND UNTIL LATER THIS EVENING. SHOWERS WILL FAVOR WINDWARD AREAS ONCE THE NORTHEAST WINDS SETTLE IN LATER TODAY. ON MONDAY...HIGH PRESSURE CENTERED NORTHWEST OF KAUAI WILL PRODUCE A BRIEF RETURN TO MODERATE NORTHEAST TRADES. STARTING TUESDAY...THE HIGH WILL MOVE SOUTHWARD...DRAGGING ITS ASSOCIATED RIDGE DOWN TO 25N ON TUESDAY AND EVENTUALLY OVER THE STATE BY THURSDAY. THE RESULT WILL BE A RETURN TO LIGHT OR NO TRADES WITH LAND AND SEA BREEZES BECOMING THE DOMINANT WIND PATTERN OVER THE SECOND HALF OF THIS WEEK AND INTO NEXT WEEKEND. THE ATMOSPHERE WILL BE QUITE STABLE AND MOISTURE LIMITED...THUS EXPECT NO MORE THAN ISOLATED LIGHT AFTERNOON SHOWERS OVER INTERIOR AREAS FROM WEDNESDAY THROUGH SATURDAY. NIGHTS AND MORNINGS WILL BE MOSTLY CLEAR. WINDS ACROSS THE BIG ISLAND SUMMITS HAVE INCREASED OVERNIGHT AND THE ADVISORY HAS BEEN UPGRADED TO A WARNING. THE STRONG WINDS WILL LAST THROUGH THIS EVENING AND DECREASE BY MONDAY MORNING. && AN INCOMING NORTHWEST SWELL WILL PRODUCE SURF APPROACHING ADVISORY LEVELS THURSDAY. && .HFO WATCHES/WARNINGS/ADVISORIES... WIND ADVISORY UNTIL 6 AM HST MONDAY FOR BIG ISLAND SUMMITS. && TANABE
The national radar mosaic for the moment the first event began.
1 high wind. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Hawaii in 2007Every state in 2007This day in weather historyWarnings in Hawaii, April 2007
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 22166.