An upper low passing by the Aloha State produced high winds over the summit of Haleakala in Maui, and the summits of Mauna Kea and Mauna Loa on the Big Island of Hawaii. No significant injuries or property damage were reported.
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The episode as NWS HFO wrote it up.
An upper low passing by the Aloha State produced high winds over the summit of Haleakala in Maui, and the summits of Mauna Kea and Mauna Loa on the Big Island of Hawaii. No significant injuries or property damage were reported.
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 Jun 17, 5:15 PM HST, 1 hour 34 minutes earlier.
AREA FORECAST DISCUSSION...UPDATE NATIONAL WEATHER SERVICE HONOLULU HI 515 PM HST SUN JUN 17 2012 .UPDATE... STRONG WINDS HAVE ALREADY DEVELOPED IN THE HUMUULA SADDLE OF THE BIG ISLAND...AND THE WIND ADVISORY HAS BEEN PLACED IN EFFECT NOW FOR THE BIG ISLAND INTERIOR. && .SYNOPSIS... STRENGTHENING HIGH PRESSURE AT THE SURFACE AND ALOFT WILL BRING STABLE CONDITIONS AND INCREASING TRADE WINDS TONIGHT...WITH STRONG AND GUSTY WINDS AND RATHER DRY WEATHER IN STORE ON MONDAY. HIGH CLOUDS WILL GRADUALLY THIN FROM EAST TO WEST THROUGH MONDAY. TRADE WINDS WILL EASE BACK TO MODERATE STRENGTH ON TUESDAY AND WEDNESDAY AS WINDWARD RAINFALL PICKS BACK UP. && .DISCUSSION... TRADE WINDS WILL CONTINUE TO RATCHET UP INTO MONDAY. A 1035 MB HIGH NOW CENTERED 1100 MILES NORTHEAST OF THE STATE WILL SETTLE NORTH OF THE ISLANDS LATE TONIGHT AND MONDAY. AS THE HIGH MOVES TO THE NORTH OF THE STATE...THE PRESSURE GRADIENT...ALREADY AN IMPRESSIVE 6 TO 6.5 MB BETWEEN BUOYS 51000 AND 51002...WILL INCREASE FURTHER LEADING TO AN INCREASE IN THE TRADES. IN ADDITION...BUILDING MID LEVEL RIDGING WILL LIKELY PRODUCE STRONG WINDS GUSTS AROUND THE ADVISORY LEVEL DURING THE DAY ON MONDAY...AND A WIND ADVISORY HAS BEEN ISSUED FOR ALL ISLANDS. MEAGER RAINFALL IS EXPECTED TONIGHT AND MONDAY. A MID TO UPPER LEVEL LOW CENTERED 250 MILES WEST OF KAUAI IS PRODUCING ELEVATED INSTABILITY OVER THE WESTERN END OF THE STATE...BUT RIDGING ALOFT CONTINUES TO BUILD IN FROM THE EAST. AS A RESULT...THE AFTERNOON SOUNDINGS AND RECENT AIRCRAFT DATA SHOW STRONG MID LEVEL WARMING WITH A STRENGTHENING INVERSION BETWEEN 3000 TO 5000 FT. PRECIPITABLE WATER VALUES IN THE TRADE WIND FLOW JUST UPWIND OF THE STATE ARE AS LOW AS 0.5 TO 0.75 OF AN INCH...BONE DRY BY JUNE STANDARDS. AS THIS AIR MASS MOVES IN WITH THE STABLE CONDITIONS...EXPECT MINIMAL WINDWARD RAINFALL AND DRY LEEWARD CONDITIONS INTO MONDAY. THE WESTWARD-DRIFTING MID TO UPPER LEVEL LOW WILL ALLOW HIGH CLOUDS TO SLOWLY CLEAR FROM EAST TO WEST THROUGH MONDAY AND WILL ALSO PRODUCE STRONG WINDS OVER THE HIGH SUMMITS ON MAUI AND THE BIG ISLAND. WINDS ON THE SUMMITS CONTINUE TO HOVER AROUND THE ADVISORY MARK THIS AFTERNOON...AND A FURTHER INCREASE TO WARNING LEVELS IS EXPECTED TONIGHT INTO MONDAY AS THE PRESSURE GRADIENT TIGHTENS BETWEEN THE DEPARTING UPPER LOW AND THE BUILDING MID LEVEL RIDGE. THE HIGH WIND WATCH HAS BEEN CHANGED TO A HIGH WIND WARNING FOR THE SUMMITS FOR TONIGHT AND MONDAY. WINDS WILL DECREASE TO MODERATE STRENGTH ON TUESDAY AND WEDNESDAY AS SHOWERS INCREASE. THE SURFACE RIDGE TO THE NORTH WILL WEAKEN A NOTCH WHILE A WEAKNESS DEVELOPS IN THE MID LEVEL RIDGE NEAR THE BIG ISLAND. AS A RESULT...WINDS WILL DROP TO MODERATE LEVELS AND GUSTS WILL DECREASE CONSIDERABLY AS THE INVERSION WEAKENS AND ELEVATES. THIS WILL ALSO LEAD TO AN INCREASE IN SHOWERS...PARTIALLY FUELED BY MOISTURE FROM A DISSIPATED FRONT PASSING OVER THE ISLANDS IN THE TRADE FLOW. && .MARINE... INCREASING TRADE WINDS ARE IN STORE INTO MONDAY. A LATE MORNING ASCAT PASS VERIFIED 30 KT WINDS IN THE ALENUIHAHA CHANNEL AND SOUTH OF THE BIG ISLAND...WITH ABUNDANT 25 KT WINDS NEAR THE SMALLER ISLANDS. A SMALL CRAFT ADVISORY /SCA/ IS POSTED FOR ALL WATERS AND CHANNELS THROUGH TONIGHT...AND WITH A FURTHER INCREASE IN WINDS EXPECTED MONDAY...GALE WARNINGS HAVE BEEN ISSUED FOR THE ALENUIHAHA AND PAILOLO CHANNELS AND THE WATERS SOUTH OF THE BIG ISLAND FOR MONDAY. THE SCA SHOULD BE SCALED BACK TO THE TYPICALLY WINDY WATERS AND CHANNELS AROUND THE BIG ISLAND AND MAUI ON TUESDAY OR WEDNESDAY. ROUGH TRADE WIND DRIVEN SEAS WILL BE RISING OVER THE NEXT 24 TO 48 HOURS. SURF ALONG EAST FACING SHORES MAY REACH THE 8 FOOT ADVISORY LEVEL MONDAY NIGHT OR TUESDAY AND REMAIN ELEVATED THROUGH THE MIDDLE OF THE WEEK. A PAIR OF SOUTH SWELLS WILL PRODUCE OVERHEAD SURF AT TIMES DURING THE WORK WEEK. THE OUT OF SEASON NORTHWEST SWELL WILL FADE MONDAY NIGHT. && .AVIATION... TURBULENCE IS FORECAST TO BE FAIRLY WIDESPREAD ACROSS THE MAIN HAWAIIAN ISLANDS TONIGHT AND MONDAY. AT THE LOW LEVELS...MODERATE MECHANICAL TURBULENCE LEEWARD OF EACH ISLAND IS EXPECTED AS THE TRADE WIND DRIVING HIGH FAR NORTH OF THE STATE BUILDS SOUTH. THE STRONG SURFACE WINDS EXPECTED ON MONDAY COULD RESULT IN SEVERE TURBULENCE LEEWARD OF THE ISLANDS AND LOW LEVEL WIND SHEAR AT PHOG. MID AND UPPER LEVEL WIND SHEAR ASSOCIATED WITH AN UPPER LOW SOUTHWEST OF THE STATE WILL CONTINUE TO SUPPORT MODERATE TURBULENCE ALOFT TONIGHT AND MONDAY. THIS IS BECAUSE THE INCREASING GRADIENT AND WIND SHEAR BETWEEN THE DEPARTING LOW AND A BUILDING UPPER RIDGE. THIS COULD POSSIBLY RESULT IN SEVERE UPPER AIR TURBULENCE. && .FIRE WEATHER... A VERY DRY AND STABLE AIRMASS WILL MOVE OVER THE ISLANDS TONIGHT AND MONDAY...WITH MIN RH VALUES POSSIBLY DROPPING BELOW 40 PERCENT BY MID DAY. STRONG AND GUSTY TRADE WINDS WILL ALSO PREVAIL. KBDI VALUES AT PHNL REMAIN WELL BELOW THE 600 MARK...RULING OUT A RED FLAG WARNING...BUT CONDITIONS LIKE THIS COULD STILL HAVE A PRONOUNCED EFFECT ON FIRE BEHAVIOR. && .HFO WATCHES/WARNINGS/ADVISORIES... HIGH WIND WARNING THROUGH 6 PM HST MONDAY AFTERNOON FOR HALEAKALA SUMMIT AND BIG ISLAND SUMMITS. WIND ADVISORY THROUGH 6 PM HST MONDAY FOR BIG ISLAND INTERIOR. WIND ADVISORY FROM 6 AM HST MONDAY UNTIL 6 PM HST MONDAY FOR ALL OTHER PORTIONS OF THE STATE. GALE WARNING FROM 6 AM HST MONDAY UNTIL 6 PM HST MONDAY FOR ALENUIHAHA AND PAILOLO CHANNELS AND WATERS SOUTH OF THE BIG ISLAND. SMALL CRAFT ADVISORY UNTIL 6 AM HST TUESDAY FOR ALL OTHER WATERS AND CHANNELS. && .PUBLIC AND MARINE...WROE .AVIATION...FOSTER
The national radar mosaic for the moment the first event began.
2 high wind. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Hawaii in 2012Every state in 2012This day in weather historyWarnings in Hawaii, June 2012
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: 380494, 380495.