Wind Advisory 11, NWS Honolulu, HI

000 
WWHW70 PHFO 300132
NPWHFO

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE HONOLULU HI
332 PM HST TUE APR 29 2008

...WIND ADVISORY FOR THE SUMMITS OF MAUNA LOA AND MAUNA KEA
THROUGH 6 AM WEDNESDAY...

.STRONG AND GUSTY SOUTHEAST WINDS ARE BEING REPORTED AT THE
SUMMITS OF MAUNA LOA AND MAUNA KEA. THESE WINDS WILL DIMINISH
EARLY WEDNESDAY...

HIZ028-301445-
/O.EXT.PHFO.WI.Y.0011.000000T0000Z-080430T1600Z/
BIG ISLAND SUMMITS-
332 PM HST TUE APR 29 2008

...WIND ADVISORY NOW IN EFFECT UNTIL 6 AM HST WEDNESDAY...

WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR
HIGH PROFILE VEHICLES. USE EXTRA CAUTION.

$$

000 
WWHW70 PHFO 301339
NPWHFO

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE HONOLULU HI
339 AM HST WED APR 30 2008

...WIND ADVISORY FOR THE BIG ISLAND SUMMITS...

.WINDS ACROSS THE BIG ISLAND SUMMITS WILL BE ENHANCED TODAY
BETWEEN AN UPPER LEVEL LOW WEST OF THE STATE AND AN UPPER LEVEL
RIDGE EAST OF THE STATE. WIND SPEEDS WILL SLOWLY DIMINISH THROUGH
THE DAY.

HIZ028-010245-
/O.EXT.PHFO.WI.Y.0011.000000T0000Z-080501T0400Z/
BIG ISLAND SUMMITS-
339 AM HST WED APR 30 2008

...WIND ADVISORY NOW IN EFFECT UNTIL 6 PM HST THIS AFTERNOON...

THE WIND ADVISORY IS NOW IN EFFECT UNTIL 6 PM HST THIS AFTERNOON.

SOUTHEAST WINDS OF 20 TO 30 MPH WILL CONTINUE TODAY.

A WIND ADVISORY MEANS THAT WINDS OF 30 MPH ARE EXPECTED. WINDS
THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH
PROFILE VEHICLES. USE EXTRA CAUTION.

$$

BRAVENDER

000 
WWHW70 PHFO 010132
NPWHFO

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE HONOLULU HI
332 PM HST WED APR 30 2008

...WIND ADVISORY CANCELLED...

.WINDS OVER THE BIG ISLAND SUMMITS HAVE SUBSIDED BELOW ADVISORY
LEVELS.

HIZ028-010245-
/O.CAN.PHFO.WI.Y.0011.000000T0000Z-080501T0400Z/
BIG ISLAND SUMMITS-
332 PM HST WED APR 30 2008

...WIND ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN HONOLULU HAS CANCELLED THE WIND
ADVISORY. 

WINDS WILL REMAIN IN THE 15 TO 25 MPH RANGE OVERNIGHT WITH A FEW
GUSTS TO 35 MPH CAN BE EXPECTED THROUGH THIS EVENING.

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
1000 AM HST TUE APR 29 2008

.SYNOPSIS...
HIGH PRESSURE WILL DOMINATE NORTHEAST OF THE STATE. TRADE WINDS WILL
STRENGTHEN SLIGHTLY THROUGH WEDNESDAY...BRINGING INCREASED SHOWERS
MAINLY TO WINDWARD SLOPES. HIGH CLOUDS WILL COVER THE ISLANDS AT
TIMES THROUGH THE FIRST HALF OF THE WEEK.

&&

.DISCUSSION...
A FAMILY OF UPPER TROUGHS ABOUT WEST AND SOUTHWEST OF THE STATE IS
SWEEPING A MASS OF HIGH CLOUDS OVER THE ISLANDS FROM THE SOUTH THIS
MORNING. CURRENTLY IT APPEARS THAT THE HIGH CLOUDS WILL LINGER
THROUGH THE DAY TODAY. THE INCREASE IN CLOUD COVER WILL HELP TO KEEP
TEMPERATURES A FEW DEGREES COOLER STATEWIDE.

CONDITIONS REMAIN QUITE STABLE...AT LEAST IN THE LOWER LEVELS. 2 AM
BALLOON SOUNDINGS FROM HILO AND LIHUE SHOW THE TRADE WIND INVERSION
HOVERING NEAR 5000 FEET. HOWEVER...INSTABILITY AND INCREASED
MOISTURE AT THE MID LEVELS OF THE ATMOSPHERE COULD PROMOTE THE
DEVELOPMENT OF AFTERNOON CLOUD BUILDUPS OVER THE HIGHER SLOPES OF
MAUI AND THE BIG ISLAND. 500MB TEMPERATURES ARE RUNNING -11 TO -13
DEGREES CENTIGRADE. THIS WILL DEPEND ON THE AMOUNT OF HEATING DURING
THE DAY...BUT WITH HIGH CLOUDS OVER THE AREA...EFFECTIVE INSOLATION
WILL BE INHIBITED SOMEWHAT.

THE INCREASED MOISTURE ALOFT HAS PROMPTED AN UPDATE TO THE ONGOING
MORNING FORECAST. WEBCAMS THIS MORNING AT THE SUMMITS HAVE SHOWN A
LIGHT DUSTING OF SNOW OVER THE SUMMITS OF MAUNA LOA AND MAUNA KEA.
FORECAST MODELS INDICATE A DRYING TREND TO OCCUR LATER THIS EVENING
SO THE THREAT OF PRECIPITATION IS EXPECTED TO WANE OVERNIGHT.

THE WEAKENING FRONT TO THE NORTHWEST OF THE MAIN HAWAIIAN IS NOT
EXPECTED TO HAVE MUCH EFFECT ON ISLAND WEATHER. HIGH PRESSURE
DOMINATING TO THE NORTHEAST OF THE STATE WILL STRENGTHEN
FURTHER...KEEPING THE FRONT AWAY. TRADES WIND SPEEDS WILL INCREASE
A NOTCH THROUGH WEDNESDAY AND HOLD THROUGH THE END OF THE WEEK...AND
SHOWERS WILL BE FOCUSED ON WINDWARD AND MOUNTAIN AREAS. ACCUMULATION
AMOUNTS WILL REMAIN ON THE LIGHT SIDE. PREVAILING TRADES WILL
CONTINUE TO BLOW VOLCANIC EMISSIONS FROM KILAUEA TO THE WEST...AWAY
FROM HILO AND THE SMALLER ISLANDS...BUT KEEPING SOUTHWEST PORTIONS
OF THE BIG ISLAND QUITE HAZY.

BY THE END OF THE WEEKEND...FORECAST MODELS ARE SHOWING AN UPPER
TROUGH TO TO AFFECT THE RIDGE ALOFT OVER THE ISLANDS AS A WEAKENING
FRONT APPROACHES FROM THE NORTHWEST. IN THIS SCENARIO...WINDS FROM
SUNDAY INTO NEXT TUESDAY WILL SHIFT SLIGHTLY. A SOUTHEASTERERLY
COMPONENT MAINLY AROUND KAUAI WILL TRANSITION TO NEARLY EASTERLY
WINDS ACROSS THE REST OF THE STATE.

&&

MARINE...
THE 1910Z QUIKSCAT PASS SHOWED MODERATE TO FRESH TRADE WINDS WITH
SPEEDS IN THE 25 KT RANGE OVER THE WATERS ON THE WINDWARD SIDE OF
THE ISLANDS AND THROUGH THE CHANNELS. THE SMALL CRAFT ADVISORY HAS
BEEN EXPANDED TO COVER THESE ZONES. SOME ACCELERATION EFFECT AROUND
THE INDIVIDUAL ISLANDS ARE PRODUCING GUSTY WINDS AROUND THE TIPS AND
MAY BE BLEEDING INTO THE LEEWARD WATERS. HOWEVER COVERAGE OF THESE
LOCALIZED GUSTS ARE NOT ENOUGH TO WARRANT AN ADVISORY IN THE LEEWARD
WATERS OF THE WESTERN ISLANDS.

THE HIGH SURF ADVISORY CONTINUES FOR SOUTH FACING SHORES. A POWERFUL
STORM EAST OF NEW ZEALAND LAST WEEK PRODUCED A LARGE SOUTH SWELL
WHICH WILL BE ROLLING ON SOUTH FACING SHORELINES. THE SWELL WILL
CONTINUE TO BUILD THROUGH WEDNESDAY...AND CONTINUE AT ELEVATED
LEVELS THROUGH THURSDAY.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
HIGH SURF ADVISORY UNTIL 6 PM HST THURSDAY FOR SOUTH FACING SHORES
OF ALL HAWAIIAN ISLANDS.

SMALL CRAFT ADVISORY UNTIL 6 AM HST WEDNESDAY FOR KAUAI NORTHWEST
WATERS-KAUAI WINDWARD WATERS-KAUAI CHANNEL-OAHU WINDWARD
WATERS-KAIWI CHANNEL-MAUI COUNTY WINDWARD WATERS-MAALAEA
BAY-PAILOLO CHANNEL-ALENUIHAHA CHANNEL-BIG ISLAND WINDWARD
WATERS-BIG ISLAND LEEWARD WATERS-BIG ISLAND SOUTHEAST WATERS.

&&

ELAU