High Wind Warning 7, NWS Honolulu, HI

742 
WWHW70 PHFO 121328
NPWHFO

URGENT - WEATHER MESSAGE
National Weather Service Honolulu HI
328 AM HST Mon Feb 12 2024

...HIGH WIND WARNING FOR THE BIG ISLAND SUMMITS THROUGH 6 AM HST 
TUESDAY MORNING...

.Strong winds at summit level will produce wind speeds exceeding
warning levels was extended through early Tuesday morning. These 
strong winds aloft will decrease below warning thresholds through 
the late Tuesday morning hours.

HIZ028-130230-
/O.EXT.PHFO.HW.W.0007.000000T0000Z-240213T1600Z/
Big Island Summits-
328 AM HST Mon Feb 12 2024

...HIGH WIND WARNING NOW IN EFFECT UNTIL 6 AM HST TUESDAY...

* WHAT...Northwest winds 50 to 60 mph with gusts around 75 mph.

* WHERE...Big Island summits of Mauna Kea and Mauna Loa.

* WHEN...Until 6 AM HST Tuesday.

* IMPACTS...Winds this strong can make driving and walking 
  dangerous. The winds can forcefully open doors and damage 
  hinges or slam doors shut, possibly causing injuries.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for road-closures. Postpone travel to the summits
until conditions improve.

&&

$$

RCB

334 
WWHW70 PHFO 130137
NPWHFO

URGENT - WEATHER MESSAGE
National Weather Service Honolulu HI
337 PM HST Mon Feb 12 2024

...HIGH WIND WARNING FOR THE BIG ISLAND SUMMITS THROUGH 6 AM HST
TUESDAY MORNING...

.A strong subtropical jetstream persists across the islands. 
Expect wind speeds exceeding warning levels through early Tuesday 
morning across the highest Big Island summits. Winds will decrease
below warning threshold there by late Tuesday morning.

HIZ028-131445-
/O.CON.PHFO.HW.W.0007.000000T0000Z-240213T1600Z/
Big Island Summits-
337 PM HST Mon Feb 12 2024

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 AM HST TUESDAY...

* WHAT...Northwest winds 50 to 60 mph with gusts near 75 mph.

* WHERE...Big Island summits of Mauna Kea and Mauna Loa.

* WHEN...Until 6 AM HST Tuesday.

* IMPACTS...Winds this strong can make driving and walking 
  dangerous. The winds can forcefully open doors and damage 
  hinges or slam doors shut, possibly causing injuries.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for road-closures. Postpone travel to the summits
until conditions improve.

&&

$$

074 
WWHW70 PHFO 131312
NPWHFO

URGENT - WEATHER MESSAGE
National Weather Service Honolulu HI
312 AM HST Tue Feb 13 2024

HIZ028-131415-
/O.CAN.PHFO.HW.W.0007.000000T0000Z-240213T1600Z/
Big Island Summits-
312 AM HST Tue Feb 13 2024

...HIGH WIND WARNING IS CANCELLED...

Strong winds over the Big Island summits of Mauna Kea and Mauna
Loa have fallen below warning thresholds, and are forecast to
remain below advisory levels today. Therefore the High Wind
Warning was cancelled this morning.

$$

RCB

Area Forecast Discussion
National Weather Service Honolulu HI
918 AM HST Sun Feb 11 2024

.SYNOPSIS...
Light winds and mostly dry weather will prevail until Wednesday,
though a weak front may bring a few windward showers Monday night
and Tuesday. Southwest winds will increase on Wednesday as a
stronger front approaches. This front will bring a period of
widespread clouds and showers as it moves down the island chain
from Wednesday night through Friday. Breezy and cool northeasterly
trade winds on Friday will gradually veer to the east this coming
weekend, bringing passing windward showers.

&&

.DISCUSSION...

Overnight land breezes are supporting mostly clear skies along with
cool, crisp early morning temperatures. This is especially true for
interior and/or slightly elevated areas such as central Oahu,
Molokai, and Maui which all dipped into the upper 50s to around 60
degrees this morning. Exceptions to the rule have been Windward Big
Island and Haleakala where ESE winds have maintained a steady supply
of low clouds and periods of showers. Meanwhile, land breeze
convergence is capitalizing on available moisture to bring pockets
of showers to the nearshore waters of the smaller islands. This
activity will remain offshore. The light gradient will remain in
place through at least tonight, meaning afternoon sea breezes will
bring a transition to interior clouds and a few showers this
afternoon followed by another round of clearing and relatively cool
temperatures tonight as land breezes develop and push offshore. The
strong inversion around 7kft noted on this morning's soundings will
limit coverage and intensity of any showers that do develop today.

On Monday, the islands will reside on the far southern periphery of
cyclonic flow around a low centered in the NE Pacific. This will be
just enough to transition winds to moderate westerlies and will
likely just enough to offset sea breeze potential except for the
most sheltered locales along southeast-facing slopes. Overall, a dry
day for the vast majority of the area. The tail end of the front
associated with this low will then bring a modest increase in low-
level moisture along with a transition to northerly winds Monday
night into Tuesday. Lack of upper support and building mid-level
ridging will ensure that this remnant frontal moisture doesn't
amount to much, but a modest increase in windward showers will
nonetheless be possible during this time. A few showers may be
possible over interior areas on Tuesday afternoon, similar to the
last couple of days, as emerging sea breezes capitalize on lingering
low-level moisture.

Expansive low pressure advances across the north central Pacific
during mid-week bringing increasing southwest winds ahead of the
attendant cold front, especially over Kauai and Oahu. A brief round
of showers anchored along the front will sweep through the
islands late Wednesday through Friday followed by a transition to
breezy and cool (dewpoints well into the 50s) NW to N winds by
week's end. As the progressive governing surface high shifts east,
winds will veer to a NE trade wind direction during the weekend.
This will bring a return to a typical distribution of clouds and
showers focused over windward and mauka zones.

&&

.AVIATION...

Weak ridging north of the state will maintain light background flow
with a land and sea breeze pattern for the islands for the next
couple of days. Mostly dry conditions and minimal clouds are
expected overnight into the early morning hours, followed by
increasing clouds and a few showers from late morning through
early afternoon. This pattern will persist through Monday, though
increasing low-level moisture could enhance windward shower
activity by Monday night into Tuesday.

There are currently no AIRMETS in effect, and none are expected
today or tonight.

&&

.MARINE...

A weak surface high pressure ridge just north to northeast of the
state is producing light to moderate southeasterlies across the
coastal waters east of Maui and to the east and southeast of the
Big Island. The Big Island is blocking these winds for the rest of
the island chain so the winds over the coastal waters from Maui
to Kauai County have light and variable winds. Winds will become
light to moderate from the west to northwest as a weak front moves
into the area Monday and Monday night. A brief period of light
and variable winds will follow on Tuesday and Tuesday night. On
Wednesday, winds will switch to moderate to fresh southwesterlies
as a stronger front approaches. The front should move through the
area Wednesday night through early Thursday morning. After the
front passes, winds will switch to northwesterlies, then
northerlies through the day on Thursday. The northerlies will
transition to northeasterlies Friday night and Saturday as high
pressure moves in north of the area.

A medium period northwest swell continues to slowly subside. This
trend should continue through Monday. A small, short-period
north-northwest swell will support small surf Tuesday and
Wednesday.

On Thursday, an extra-large, long-period northwest (320 deg)
swell is expected to arrive, very likely producing surf well
above warning levels along exposed north and west facing shores
through Friday. Lack of significant high tides may limit coastal
impacts. This swell will gradually diminish Saturday and Sunday.
The increased winds and seas from Wednesday onward will lead to
the issuance of a Small Craft Advisory (SCA) for most coastal
zones, but until then, no SCA conditions are expected.

A couple of small, long-period south-southwest swells with Tasman
Sea origins will provide small surf to south facing shores for
the next couple of days.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
High Wind Watch from 6 PM HST this evening through Monday
afternoon for Big Island Summits.

&&

DISCUSSION...JVC
AVIATION...Vaughan
MARINE...Kodama