Sunrise 5:48 AM   Sunset 6:56 PM Moonrise 9:59 AM   Moonset 11:54 PM

  Print   HELP   Reset   Save   Recall  New

PHZ120 Pailolo Channel- 333 Pm Hst Sun May 12 2024
Tonight - East southeast winds 15 to 20 knots. Seas 3 to 5 feet. Wave detail: east 4 feet at 7 seconds. Isolated showers. Monday - East southeast winds 10 to 15 knots, becoming east northeast 15 to 20 knots in the afternoon. Seas 3 to 5 feet. Wave detail: east 3 feet at 6 seconds. Isolated showers. Monday night - East northeast winds 10 to 15 knots in the evening, becoming variable less than 10 knots. Seas 3 to 5 feet. Isolated showers. Tuesday - Winds variable less than 10 knots. Seas 3 to 4 feet. Isolated showers. Tuesday night - Winds variable less than 10 knots. Seas to 3 feet. Isolated showers. Wednesday - South southwest winds 7 to 10 knots. Seas to 3 feet. Isolated showers in the morning, then scattered showers in the afternoon. Wednesday night - South southwest winds to 10 knots. Seas 3 to 4 feet. Heavy showers with a chance of Thunderstorms. Thursday - South southwest winds to 10 knots, becoming variable less than 10 knots, then becoming south 7 to 10 knots after midnight. Seas 3 to 4 feet. A chance of Thunderstorms in the morning. Occasional showers. Isolated Thunderstorms. Friday - South winds 7 to 10 knots, becoming variable less than 10 knots, then becoming south 7 to 10 knots after midnight. Seas 3 to 4 feet. Occasional showers in the morning. Isolated Thunderstorms. Scattered showers.
winds and seas higher in and near tstms.

PHZ100 333 Pm Hst Sun May 12 2024
Synopsis for hawaiian coastal waters - A trough over the central waters will shift westward through tonight as high pressure builds northeast of the state. The trough will amplify west of the islands Monday and Tuesday, then merge with a front and approach from the west Wednesday and move into the waters on Thursday.

FXHW60 PHFO 130131 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 331 PM HST Sun May 12 2024

SYNOPSIS
A land and sea breeze pattern will favor clouds and showers over island interiors for the next few afternoons. A kona low will then bring a threat of heavy rain to the area from Wednesday night into the weekend.

DISCUSSION

Light easterlies will veer to southeasterly during the next couple of days supporting a continued land and sea breeze pattern. This will spell interior clouds and showers along sea breeze boundaries followed by clearing and a transition to offshore showers each night. This veered southeasterly flow is forecast to develop as a consequence of a digging mid-latitude trough which is presently centered along the International Dateline. This will advect higher and more uncomfortable dewpoints in the upper 60s to near 70 into the region by Monday night where they will likely stay for most or all of the week.

Deep layer flow over the islands then veers to southwesterly as aforementioned trough closes off and begets a kona low positioned near 30N by Tuesday night. Large scale ascent will increase modestly during this time as moisture transport into the area increases. The gradient at the surface will remain light during this time perhaps resulting showers that remain largely offshore courtesy of island land breezes. South to southwest flow reaches the surface during Wednesday, increasing confidence in a shower threat for all locales thereafter. Stability around 500mb and above is relatively high to start, but if the low remains established through the weekend, deep convection and isolated thunderstorms will become an increasing threat as stability erodes.

At this stage, global model consensus remains quite strong that convergent SW flow will support a swath (or swaths) of moderate to potentially heavy rainfall over the islands perhaps as early as Wednesday night and continuing into the weekend. Key differences arise in the guidance by the weekend when the resident kona low is modeled to phase with additional energy digging southward out of the northern branch of the jet stream. This will likely have significant consequences for the location of the heavy rain band heading into the weekend. The key message is that an elevated heavy rain and potential flooding threat has emerged in the period from Wednesday into the weekend.



AVIATION

A lingering upper level disturbance will gradually weaken but still provide enough instability for a few more heavy showers across the state through this evening, with the possibility remaining for an isolated thunderstorm or two over the Big Island.
Winds will remain light enough to allow for a land/sea breeze pattern where clouds and showers will build up over island interiors during the afternoon/early evening hours and begin to clear out overnight. Overall, showers will trend weaker/lighter heading into tomorrow as the upper level support wanes. MVFR conditions are still expected in any heavier showers, with brief IFR conditions possible.

AIRMET Sierra for tempo mountain obscuration is in effect over the the Big Island, Maui, Oahu and Kauai. This AIRMET may be needed on and off into the evening hours due to shower activity.

AMD NOT SKED for PMDY continues due to equipment issues, with no timeline for restoration.

MARINE

Moderate to fresh east-southeast trade winds will persist through Monday. Winds will weaken Monday night and become more southerly on Tuesday as troughing amplifies to the west of the state.
Moderate southerly winds will develop in advance of a front Wednesday. The front will then move into the islands on Thursday, with moderate northwesterly winds developing behind the front over the western end of the state and moderate southerly winds prevailing ahead of the feature.

Surf along south facing shores will slowly decline into Monday.
However, by Monday night another series of overlapping, long- period south swells will begin moving into the islands. An additional reinforcing south swell will arrive on Wednesday, giving another noticeable boost to south shore surf through the rest of the week.

A small, long-period northwest swell will build this evening, and latest observations already showed north shore surf above the previous forecast for late this afternoon. This swell will continue to move into the islands tonight, peak on Monday, and then slowly decline Tuesday, giving north shore surf a boost for the next couple of days. A series of small reinforcing northwest swells will keep some small surf moving into north facing shores Wednesday into the weekend.

Surf along east facing shores will remain well below normal levels through late this week.

HFO WATCHES/WARNINGS/ADVISORIES
None.

toggle option: (graph/table)

Kamalo Harbor
Click for Map
Sun -- 03:19 AM HST     0.06 feet Low Tide
Sun -- 05:50 AM HST     Sunrise
Sun -- 07:00 AM HST     0.34 feet High Tide
Sun -- 09:59 AM HST     Moonrise
Sun -- 11:26 AM HST     0.06 feet Low Tide
Sun -- 06:57 PM HST     Sunset
Sun -- 07:30 PM HST     1.96 feet High Tide
Sun -- 11:53 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION

Kamalo Harbor, Molokai Island, Hawaii, Tide feet

Kaunakakai
Click for Map
Sun -- 03:27 AM HST     0.06 feet Low Tide
Sun -- 05:51 AM HST     Sunrise
Sun -- 07:32 AM HST     0.34 feet High Tide
Sun -- 09:59 AM HST     Moonrise
Sun -- 11:34 AM HST     0.06 feet Low Tide
Sun -- 06:57 PM HST     Sunset
Sun -- 08:02 PM HST     1.96 feet High Tide
Sun -- 11:54 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION

Kaunakakai, Molokai (Hawaii) (2), Tide feet

Full Color Weather Map

Link to Loop


Other links: GEOS-West     Contential US     Full GOES-East

Molokai/Honolulu,HI