Small Craft Advisory 2, NWS Honolulu, HI

743 
WHHW70 PHFO 130747
MWWHFO

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE HONOLULU HI
947 PM HST THU JAN 12 2017

...SMALL CRAFT ADVISORY...

.A LARGE WEST-NORTHWEST SWELL WILL BEGIN TO FILL IN ACROSS THE
KAUAI WATERS BY DAYBREAK FRIDAY...PEAK FRIDAY AFTERNOON THROUGH
FRIDAY NIGHT...THEN GRADUALLY SUBSIDE THROUGH THE WEEKEND.

PHZ110>112-132100-
/O.EXT.PHFO.SC.Y.0002.170113T1200Z-170114T1600Z/
KAUAI NORTHWEST WATERS-KAUAI WINDWARD WATERS-KAUAI LEEWARD WATERS-
947 PM HST THU JAN 12 2017

...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 2 AM FRIDAY TO 6 AM
HST SATURDAY...

* WINDS AND SEAS...SOUTHEAST WINDS 5 TO 10 KT. SEAS BUILDING TO 8
  TO 11 FT LATE TONIGHT...THEN TO 12 TO 16 FT FRIDAY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 25 TO 33 KNOTS
AND/OR SEAS 10 FEET OR GREATER ARE EXPECTED TO PRODUCE CONDITIONS
HAZARDOUS TO SMALL CRAFT. INEXPERIENCED MARINERS...ESPECIALLY
THOSE OPERATING SMALLER VESSELS...SHOULD AVOID NAVIGATING IN
THESE CONDITIONS.

&&

$$

PHZ113>118-121>124-132100-
/O.CON.PHFO.SC.Y.0002.170113T1600Z-170114T1600Z/
KAUAI CHANNEL-OAHU WINDWARD WATERS-OAHU LEEWARD WATERS-
KAIWI CHANNEL-MAUI COUNTY WINDWARD WATERS-
MAUI COUNTY LEEWARD WATERS-ALENUIHAHA CHANNEL-
BIG ISLAND WINDWARD WATERS-BIG ISLAND LEEWARD WATERS-
BIG ISLAND SOUTHEAST WATERS-
947 PM HST THU JAN 12 2017

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 6 AM FRIDAY TO
6 AM HST SATURDAY...

* WINDS AND SEAS...SOUTHEAST WINDS 10 TO 20 KT. SEAS BUILDING TO
  12 TO 16 FT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 25 TO 33 KNOTS
AND/OR SEAS 10 FEET OR GREATER ARE EXPECTED TO PRODUCE CONDITIONS
HAZARDOUS TO SMALL CRAFT. INEXPERIENCED MARINERS...ESPECIALLY
THOSE OPERATING SMALLER VESSELS...SHOULD AVOID NAVIGATING IN
THESE CONDITIONS.

&&

$$

090 
WHHW70 PHFO 131338
MWWHFO

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE HONOLULU HI
338 AM HST FRI JAN 13 2017

...SMALL CRAFT ADVISORY...

.A LARGE WEST-NORTHWEST SWELL WILL BUILD ACROSS THE WATERS AND
PEAK THIS AFTERNOON THROUGH TONIGHT...THEN GRADUALLY SUBSIDE
THROUGH THE WEEKEND.

PHZ110>112-140245-
/O.CON.PHFO.SC.Y.0002.000000T0000Z-170114T1600Z/
KAUAI NORTHWEST WATERS-KAUAI WINDWARD WATERS-KAUAI LEEWARD WATERS-
338 AM HST FRI JAN 13 2017

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM HST
SATURDAY...

* WINDS AND SEAS...SOUTHEAST WINDS 5 TO 10 KT. SEAS 10 TO 15 FT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 25 TO 33 KNOTS
AND/OR SEAS 10 FEET OR GREATER ARE EXPECTED TO PRODUCE CONDITIONS
HAZARDOUS TO SMALL CRAFT. INEXPERIENCED MARINERS...ESPECIALLY
THOSE OPERATING SMALLER VESSELS...SHOULD AVOID NAVIGATING IN
THESE CONDITIONS.

&&

$$

PHZ113>118-121>124-140245-
/O.CON.PHFO.SC.Y.0002.170113T1600Z-170114T1600Z/
KAUAI CHANNEL-OAHU WINDWARD WATERS-OAHU LEEWARD WATERS-
KAIWI CHANNEL-MAUI COUNTY WINDWARD WATERS-
MAUI COUNTY LEEWARD WATERS-ALENUIHAHA CHANNEL-
BIG ISLAND WINDWARD WATERS-BIG ISLAND LEEWARD WATERS-
BIG ISLAND SOUTHEAST WATERS-
338 AM HST FRI JAN 13 2017

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 6 AM THIS MORNING
TO 6 AM HST SATURDAY...

* WINDS AND SEAS...SOUTHEAST WINDS 10 TO 20 KT...HIGHEST MAUI AND
  BIG ISLAND WATERS. SEAS BUILDING TO 10 TO 15 FT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 25 TO 33 KNOTS
AND/OR SEAS 10 FEET OR GREATER ARE EXPECTED TO PRODUCE CONDITIONS
HAZARDOUS TO SMALL CRAFT. INEXPERIENCED MARINERS...ESPECIALLY
THOSE OPERATING SMALLER VESSELS...SHOULD AVOID NAVIGATING IN
THESE CONDITIONS.

&&

$$

556 
WHHW70 PHFO 140107
MWWHFO

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE HONOLULU HI
307 PM HST FRI JAN 13 2017

...SMALL CRAFT ADVISORY...

.A LARGE WEST-NORTHWEST SWELL WILL PRODUCE HAZARDOUS SEAS IN
EXCESS OF 10 FEET TONIGHT...THEN GRADUALLY SUBSIDE THROUGH THE
WEEKEND. SWELLS OF 10 FEET MAY LINGER ACROSS SOME EXPOSED
WATERS INTO SATURDAY.

PHZ110>118-121>124-141415-
/O.CON.PHFO.SC.Y.0002.000000T0000Z-170114T1600Z/
KAUAI NORTHWEST WATERS-KAUAI WINDWARD WATERS-KAUAI LEEWARD WATERS-
KAUAI CHANNEL-OAHU WINDWARD WATERS-OAHU LEEWARD WATERS-
KAIWI CHANNEL-MAUI COUNTY WINDWARD WATERS-
MAUI COUNTY LEEWARD WATERS-ALENUIHAHA CHANNEL-
BIG ISLAND WINDWARD WATERS-BIG ISLAND LEEWARD WATERS-
BIG ISLAND SOUTHEAST WATERS-
307 PM HST FRI JAN 13 2017

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM HST
SATURDAY...

* SEAS...WEST-NORTHWEST AT 10 TO 15 FT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 25 TO 33 KNOTS
AND/OR SEAS 10 FEET OR GREATER ARE EXPECTED TO PRODUCE CONDITIONS
HAZARDOUS TO SMALL CRAFT. INEXPERIENCED MARINERS...ESPECIALLY
THOSE OPERATING SMALLER VESSELS...SHOULD AVOID NAVIGATING IN
THESE CONDITIONS.

&&

$$

577 
WHHW70 PHFO 141322
MWWHFO

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE HONOLULU HI
322 AM HST SAT JAN 14 2017

...SMALL CRAFT ADVISORY FOR MOST WATERS...

.A LARGE WEST-NORTHWEST SWELL WILL CONTINUE TO IMPACT THE MARINE
AREA TODAY...BEFORE GRADUALLY SUBSIDING THROUGH THE REST OF THE
WEEKEND. 

PHZ115-118-141430-
/O.CAN.PHFO.SC.Y.0002.000000T0000Z-170114T1600Z/
OAHU LEEWARD WATERS-MAUI COUNTY LEEWARD WATERS-
322 AM HST SAT JAN 14 2017

...SMALL CRAFT ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN HONOLULU HAS CANCELLED THE SMALL
CRAFT ADVISORY. 

$$

PHZ110>114-116-117-121>124-150230-
/O.EXT.PHFO.SC.Y.0002.000000T0000Z-170115T0400Z/
KAUAI NORTHWEST WATERS-KAUAI WINDWARD WATERS-KAUAI LEEWARD WATERS-
KAUAI CHANNEL-OAHU WINDWARD WATERS-KAIWI CHANNEL-
MAUI COUNTY WINDWARD WATERS-ALENUIHAHA CHANNEL-
BIG ISLAND WINDWARD WATERS-BIG ISLAND LEEWARD WATERS-
BIG ISLAND SOUTHEAST WATERS-
322 AM HST SAT JAN 14 2017

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 6 PM HST THIS
EVENING...

* SEAS...WEST-NORTHWEST AT 9 TO 11 FT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 25 TO 33 KNOTS
AND/OR SEAS 10 FEET OR GREATER ARE EXPECTED TO PRODUCE CONDITIONS
HAZARDOUS TO SMALL CRAFT. INEXPERIENCED MARINERS...ESPECIALLY
THOSE OPERATING SMALLER VESSELS...SHOULD AVOID NAVIGATING IN
THESE CONDITIONS.

&&

$$

531 
WHHW70 PHFO 150132
MWWHFO

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE HONOLULU HI
332 PM HST SAT JAN 14 2017

PHZ110>114-116-117-121>124-150245-
/O.CAN.PHFO.SC.Y.0002.000000T0000Z-170115T0400Z/
KAUAI NORTHWEST WATERS-KAUAI WINDWARD WATERS-KAUAI LEEWARD WATERS-
KAUAI CHANNEL-OAHU WINDWARD WATERS-KAIWI CHANNEL-
MAUI COUNTY WINDWARD WATERS-ALENUIHAHA CHANNEL-
BIG ISLAND WINDWARD WATERS-BIG ISLAND LEEWARD WATERS-
BIG ISLAND SOUTHEAST WATERS-
332 PM HST SAT JAN 14 2017

...SMALL CRAFT ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN HONOLULU HAS CANCELLED THE SMALL
CRAFT ADVISORY. 

SEAS HAVE FALLEN BELOW 10 FEET ACROSS THE AREA THEREFORE THE SMALL
CRAFT ADVISORY HAS BEEN CANCELLED.

$$

EVANS

Area Forecast Discussion
National Weather Service Honolulu HI
937 AM HST Thu Jan 12 2017

.SYNOPSIS...
A powerful storm in the north Pacific created a swell that will
produce very large surf along north and west facing shores starting
early Friday morning. A surface ridge will remain over the islands
through Saturday. The ridge will bring mostly dry and hazy weather.
The ridge will shift north slowly early next week allowing trade
winds to gradually build over the islands.

&&

.DISCUSSION...
A ridge, at the surface and aloft, will remain near the islands
through Saturday. Moderate east southeast winds near the Big Island,
veer to south southeast over Kauai. The Big Island and Maui block
much of the low level flow so winds will be light and variable on
the smaller islands. The light low-level flow will allow nighttime
land breezes and daytime sea breezes to prevail. The sea breezes
will produce afternoon cloudiness over interior areas but the
atmosphere will remain stable so rainfall will be sparse. The east
southeast winds will carry volcanic emissions from Kilauea (VOG)
over the smaller islands, so it will remain hazy through the weekend.

The global models are in good agreement showing surface pressures
building northeast of the state early next week. The surface ridge
near the islands will strengthen and shift north and trade winds
will build over the islands. The trade winds will help clear the vog
early next week. Trade winds could become breezy by mid-week.
Returning trade winds will likely bring windward showers, but the
atmosphere is expected to remain rather stable, so no excessive rain
is likely.

&&

.AVIATION...
There are no AIRMETs in effect and none are expected through
tomorrow. A surface ridge near Kauai will remain nearly stationary.
Moderate to locally fresh east winds south of the Big Island will
veer to south southeast near Kauai. Daytime sea breezes and
nighttime land breezes will prevail. The ridge will maintain stable
conditions over the area. VFR will prevail at the TAF sites over the
main Hawaiian islands, but TEMPO MVFR is possible over interior
areas, including Lanai Airport, during the afternoons.

&&

.MARINE...
The northwest swell that arrived yesterday afternoon peaked late
last night on Kauai and near sunrise on Oahu. This swell will
produce advisory level surf along north and west facing shores of
the smaller islands today, but combined seas will remain below the
10 Ft Small Craft Advisory threshold. Surf from this swell will drop
below the high surf advisory level this evening.

A hurricane force low in the north Pacific has produced a very large
west northwest swell headed toward the islands. Forerunners from
this swell will reach Kauai as early as this evening with surf along
exposed north and west facing shores building above the 25 ft High
Surf Warning level Friday morning on the smaller islands. Since this
swell will be coming from a west northwest direction, the surf will
be partly blocked by Kauai and Niihau, so surf will be smaller on
Oahu than Kauai County. On the other hand, this west northwest
direction will allow quite a bit of the swell energy to pass south
of Kauai and Niihau and reach west-facing shores of the Big Island.
Surf is expected to reach the 12 ft High Surf Warning level on the
west-facing shores of the Big Island by Friday evening.

Another very large swell is likely around the middle of next week,
but there is some uncertainty due to model differences between the
GFS and its ensemble mean and the ECMWF-WAVE.

The ridge near the islands will keep winds relatively light over the
coastal waters through the weekend, so no Small Craft Advisories for
winds are expected over the next few days. Combined seas will rise
above the 10 ft Small Craft Advisory threshold in areas of the
coastal waters exposed to the large swell. Moderate to fresh trades
may return by the middle of next week as high pressure builds
northeast of the area.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
High Surf Advisory until 600 PM this evening for north and west
facing shores of Niihau Kauai Oahu and Molokai, and for north facing
shores of Maui.

High Surf Warning from 600 AM Friday for north and west facing
shores of Niihau Kauai Oahu and Molokai, and for north facing shores
of Maui.

High Surf Warning from noon Friday for west facing shores of the Big
Island.

Small Craft Advisory starting 600 AM Friday for all coastal waters
except the Pailolo Channel and Maalea Bay for large combined seas.

&&

Donaldson