Wind Advisory 41, NWS Honolulu, HI

000 
WWHW70 PHFO 272352
NPWHFO

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE HONOLULU HI
152 PM HST SAT OCT 27 2007

...STRONG WINDS ON HALEAKALA SUMMIT...

.A STRONG HIGH FAR NORTHEAST OF THE ISLANDS IS PRODUCING STRONG
 AND DEEP TRADE WINDS...

HIZ022-281300-
/O.EXT.PHFO.WI.Y.0041.000000T0000Z-071028T1400Z/
HALEAKALA SUMMIT-
152 PM HST SAT OCT 27 2007

...WIND ADVISORY NOW IN EFFECT UNTIL 4 AM HST SUNDAY...

THE WIND ADVISORY WILL REMAIN IN EFFECT UNTIL 4 AM HST SUNDAY.

EAST WINDS OF 30 TO 39 MPH WILL CONTINUE WITH HIGHER GUSTS TO 50
MPH ON THE HALEAKALA SUMMIT AREA UNTIL EARLY SUNDAY MORNING.

STRONG WINDS WILL CAUSE POOR HIKING AND DRIVING CONDITIONS WITH
WIND CHILL EXPECTED TO LOWER INTO THE MID 30S. EXERCISE CAUTION.

$$

000 
WWHW70 PHFO 280603
NPWHFO

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE HONOLULU HI
803 PM HST SAT OCT 27 2007

...WIND ADVISORY IS CANCELLED...

.WEAKENING HIGH PRESSURE NORTH OF THE ISLANDS IS CAUSING THE WINDS
TO WEAKEN.

HIZ022-280715-
/O.CAN.PHFO.WI.Y.0041.000000T0000Z-071028T1400Z/
HALEAKALA SUMMIT-
803 PM HST SAT OCT 27 2007

...WIND ADVISORY IS CANCELLED...

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

WINDS OVER HALEAKALA SUMMIT HAVE DROPPED BELOW THE ADVISORY
THRESHOLD OF 30 MPH.

$$
DONALDSON

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
830 PM HST FRI OCT 26 2007

.SYNOPSIS...
HIGH PRESSURE NORTH OF THE ISLANDS WILL KEEP TRADE WINDS BLOWING
THROUGH NEXT THURSDAY. THE TRADES WILL REMAIN LOCALLY BREEZY MOST OF
THAT TIME BUT THEY MAY TAPER OFF A BIT NEXT TUESDAY. THE ATMOSPHERE
WILL REMAIN FAIRLY DRY FOR THE NEXT SEVERAL DAYS SO NO HEAVY
RAINFALL IS EXPECTED BUT SHOWERS MAY INCREASE SATURDAY NIGHT AS A
CLOUD BAND MOVES OVER THE ISLANDS FROM THE NORTHEAST. THERE MAY BE A
MORE SIGNIFICANT CHANGE IN THE WEATHER LATE NEXT WEEK AS A FRONT
APPROACHES FROM THE NORTHWEST BRINGING UNSETTLED WEATHER.

&&

.DISCUSSION...
A SURFACE HIGH ABOUT 1600 MILES NORTHEAST OF THE ISLANDS HAS
WEAKENED BY ABOUT 5 MB OVER THE PAST 24 HOURS...BUT IS STILL STRONG
ENOUGH TO KEEP OUR TRADE WINDS LOCALLY BREEZY. THE HIGH...AND OUR
TRADES...WILL GRADUALLY WEAKEN THROUGH TUESDAY. THE TRADE WINDS WILL
STRENGTHEN AGAIN WEDNESDAY AS A NEW HIGH MOVES EASTWARD.

SATELLITE IMAGERY SHOWS THAT CLOUDS HAVE INCREASED UPSTREAM OF THE
ISLANDS OVER THE PAST SEVERAL HOURS. THESE CLOUDS WILL PRODUCE SOME
SHOWERS...MAINLY OVER WINDWARD AREAS...AS THEY MOVE OVER THE ISLANDS
IN THE TRADE-WIND FLOW. SATELLITE IMAGERY SHOWS AN EAST SOUTHEAST TO
WEST NORTHWEST CLOUD BAND ABOUT 500 MILES UPSTREAM OF THE ISLANDS.
THERE MAY BE A MORE NOTICEABLE INCREASE IN CLOUDS AND SHOWERS WHEN
THAT CLOUD BAND REACHES THE ISLANDS SATURDAY NIGHT. THE ATMOSPHERE
WILL REMAIN FAIRLY STABLE FOR THE NEXT SEVERAL DAYS...SO NO HEAVY
RAINFALL IS EXPECTED.

LATE NEXT WEEK A DEEP TROUGH ALOFT AND AN ASSOCIATED SURFACE FRONT
WILL APPROACH THE ISLANDS FROM THE NORTHWEST. THE COMPUTER MODELS
HAVE BEEN SHOWING THIS FOR THE PAST FEW DAYS BUT HAVE BEEN
INCONSISTENT WITH THE DETAILS. IT LOOKS LIKE THE MODELS ARE NOW
SETTLING IN ON A MORE CONSISTENT SOLUTION. TRADE WINDS WILL WEAKEN
AS A SURFACE TROUGH FORMS OVER THE ISLANDS AHEAD OF THE APPROACHING
FRONT. THE FRONT IS LIKELY TO WEAKEN TO A SHEAR LINE AND MOVE OVER
THE ISLANDS SATURDAY EVENING BRINGING SHOWERS AND A RETURN OF TRADE
WINDS.

&&

.MARINE...
AN EAST NORTHEAST SWELL GENERATED BY STRONG TRADE WINDS ABOUT 500
MILES UPSTREAM OF THE ISLANDS WILL REACH THE ISLANDS TOMORROW SO A
HIGH SURF ADVISORY CONTINUES FOR EAST-FACING SHORES. TRADE WINDS
REMAIN RATHER STRONG...SO A SMALL CRAFT ADVISORY...SCA... CONTINUES
FOR ALL THE COASTAL WATERS. WE SHOULD BE ABLE TO DROP THE SCA FOR
SOME AREAS STARTING SATURDAY BUT THE SCA WILL CONTINUE FOR WINDIER
SPOTS THROUGH AT LEAST EARLY NEXT WEEK.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
HIGH SURF ADVISORY FOR EAST-FACING SHORES.
SMALL CRAFT ADVISORY FOR ALL COASTAL WATERS.

&&

DONALDSON