Marine Weather and Tide Forecast for Puako, HI
May 9, 2024 3:32 PM HST (01:32 UTC) Change Location
 | Sunrise 5:45 AM Sunset 6:47 PM Moonrise 7:03 AM Moonset 9:01 PM |
PHZ121 Alenuihaha Channel- 1002 Am Hst Thu May 9 2024
Rest of today - East winds 10 to 15 knots. Seas 3 to 5 feet. Wave detail: east 4 feet at 5 seconds and south southwest 3 feet at 17 seconds. Isolated showers.
Tonight - East southeast winds 10 to 15 knots. Seas 3 to 5 feet. Wave detail: east 4 feet at 7 seconds and south southwest 3 feet at 16 seconds. Isolated showers.
Friday - Southeast winds 10 to 15 knots, backing to northeast 7 to 10 knots in the afternoon. Seas to 4 feet. Wave detail: east 3 feet at 7 seconds and south southwest 3 feet at 15 seconds. Scattered showers with a chance of Thunderstorms.
Friday night - East winds 10 to 15 knots in the evening, becoming variable less than 10 knots. Seas 3 to 4 feet. Wave detail: east 3 feet at 7 seconds and south southwest 3 feet at 15 seconds. Scattered showers with a chance of Thunderstorms.
Saturday - East northeast winds 7 to 10 knots, becoming 10 to 15 knots in the afternoon. Seas 3 to 4 feet. Wave detail: east 3 feet at 7 seconds and south southwest 3 feet at 15 seconds. Scattered showers with a chance of Thunderstorms.
Saturday night - East southeast winds 10 to 15 knots. Seas 3 to 5 feet. Wave detail: east 3 feet at 7 seconds and south southwest 3 feet at 14 seconds. Scattered showers with a chance of Thunderstorms in the evening, then isolated showers after midnight.
Sunday - East winds 10 to 15 knots, becoming east northeast 15 to 20 knots. Seas 3 to 5 feet. Wave detail: east 4 feet at 7 seconds. Isolated showers.
Monday - East winds 10 to 15 knots. Seas 3 to 5 feet. Wave detail: east 4 feet at 7 seconds. Isolated showers.
winds and seas higher in and near tstms.
winds and seas higher in and near tstms.
PHZ100 1002 Am Hst Thu May 9 2024
Synopsis for hawaiian coastal waters - A strong disturbance aloft will bring a threat of Thunderstorms tonight through Saturday. A surface trough to the northwest of kauai will expand southward over the island chain tonight through Sunday. The trough will dampen and shift west of the islands early next week as high pressure builds to the distant northeast.
FXHW60 PHFO 091919 AFDHFO
Area Forecast Discussion National Weather Service Honolulu HI 919 AM HST Thu May 9 2024
SYNOPSIS
Trade winds will diminish through tonight as a broad surface trough and upper disturbance move in. Added instability associated with these features will lead to an increasing threat for strong to severe thunderstorms and heavy rainfall late tonight through Saturday. Although the thunderstorm potential will lower Sunday into early next week, plenty of moisture lingering combined afternoon sea breezes and a broad surface trough nearby will support afternoon showers over interior and leeward areas each day. The wet pattern could continue through the latter half of next week as another upper disturbance approaches.
DISCUSSION
A trough developing just west of Kauai will decrease the trade winds today with light to moderate east to southeast winds expected. A plume of moisture moved in from the east last night and is currently producing scattered showers mainly over windward and mountain areas. Sea breezes developing later this morning will lead to afternoon showers over interior and leeward areas. With some enhanced moisture already in place, we could see some downpours this afternoon. Also with the light winds, any showers will be slow moving and could cause some minor flooding impacts this afternoon through the evening hours.
An unusually strong upper level disturbance (for this time of year) will begin to move into the area tonight and will bring the threat of flash flooding and isolated severe thunderstorms across the state. Initially the main threat will start over the smaller islands of Kauai, Oahu and Maui County and expand eastward to the Big Island during the day Friday.
For tonight, the upper level trough will dig southward towards Kauai and will enhance instability over the smaller islands. With the low level winds primarily out of the southeast direction tonight, some of the favored areas for rainfall will across windward and mountain areas, especially along the Koolau mountains on Oahu. Any showers will be slow moving and could become anchored over the terrain, which could bring the threat of flash flooding.
For Friday, the upper level trough centered near Kauai in the morning will begin to move eastward and will bring an unstable environment across the state by Friday afternoon. Latest guidance is showing 500 mb temps ranging from -12C to -15C across the state with lapse rates greater than 7C/km in the low to mid levels of the atmosphere. CAPE values greater than 1000 J/kg with bulk shear values of around 40 knots should be enough to support isolated severe thunderstorms capable of producing large hail and gusty winds of greater than 50 mph. At this time, the best combination of moisture and instability and shear looks to be from Oahu towards the Big Island. Guidance has been fairly consistent with a line of showers and thunderstorms developing south of the islands Friday morning and spreading northeastward during the afternoon.
If this line of showers and thunderstorms were to develop, this very well could lead to the main impactful period on Friday.
The main takeaway for Friday is that we are not looking at a widespread rain event. Rather, we are looking at scattered heavy shower event with isolated strong to possibly severe thunderstorms. We do want to emphasize that flash flooding can occur well downstream from the mountains, where the weather could be fair. Also sudden changes of the weather will be possible. It could be sunny and fair weather one hour and you could be under a severe thunderstorm the next hour. Although not widespread, due to the potential for intense rainfall rates, a Flood Watch should be issued later today for the State of Hawaii.
AVIATION
Light to moderate trades will continue today and gradually weaken tomorrow. Daytime sea breezes and nighttime land breezes are expected over wind-protected leeward areas.
SHRA will continue to favor windward and mauka areas with the greatest coverage and intensity during the late night and early morning time period. MVFR conds are expected with these SHRA. As sea breeze activity resumes by this afternoon, SHRA and low cigs will begin to develop across some leeward/interior locations. In addition, a disturbance aloft will approach the area later today, helping to enhance shower activity across the state and bringing instability that may help to spark a few TS near Kauai sometime tonight into tomorrow morning.
AIRMET Sierra is in effect for mtn obsc across windward areas as a band of moisture moves in from the east.
MARINE
A strong disturbance aloft approaching from the north will bring a threat for strong, possibly severe, thunderstorms late tonight through Saturday. These thunderstorms will have the potential to produce dangerous wind gusts, hail, and frequent lightning. At the surface, a trough to the northwest of Kauai will strengthen and expand southward over the island chain tonight then linger through the weekend. As a result, light east to southeast winds will replace the usual trade wind flow at the surface on Friday and Saturday. Moderate easterly trade winds will gradually rebuild starting Sunday.
A long-lived south swell will affect the islands over the next several days. Surf along south facing shores is expected to hold just below the High Surf Advisory threshold of 10 feet today through Friday, then gradually decline Saturday through Tuesday. A series of overlapping long- period south swells will give another sizable boost to south shore surf Wednesday through late next week. This represents the most sustained south swell of the year.
Otherwise, north shore surf will remain tiny today and tonight, followed by a small reinforcing short-period north-northwest swell late Friday through the weekend. A small long period northwest swell will build Sunday night, giving north shore surf a boost early next week. Surf along east facing shores will be well below normal levels through the middle of next week.
HFO WATCHES/WARNINGS/ADVISORIES
None.
Area Forecast Discussion National Weather Service Honolulu HI 919 AM HST Thu May 9 2024
SYNOPSIS
Trade winds will diminish through tonight as a broad surface trough and upper disturbance move in. Added instability associated with these features will lead to an increasing threat for strong to severe thunderstorms and heavy rainfall late tonight through Saturday. Although the thunderstorm potential will lower Sunday into early next week, plenty of moisture lingering combined afternoon sea breezes and a broad surface trough nearby will support afternoon showers over interior and leeward areas each day. The wet pattern could continue through the latter half of next week as another upper disturbance approaches.
DISCUSSION
A trough developing just west of Kauai will decrease the trade winds today with light to moderate east to southeast winds expected. A plume of moisture moved in from the east last night and is currently producing scattered showers mainly over windward and mountain areas. Sea breezes developing later this morning will lead to afternoon showers over interior and leeward areas. With some enhanced moisture already in place, we could see some downpours this afternoon. Also with the light winds, any showers will be slow moving and could cause some minor flooding impacts this afternoon through the evening hours.
An unusually strong upper level disturbance (for this time of year) will begin to move into the area tonight and will bring the threat of flash flooding and isolated severe thunderstorms across the state. Initially the main threat will start over the smaller islands of Kauai, Oahu and Maui County and expand eastward to the Big Island during the day Friday.
For tonight, the upper level trough will dig southward towards Kauai and will enhance instability over the smaller islands. With the low level winds primarily out of the southeast direction tonight, some of the favored areas for rainfall will across windward and mountain areas, especially along the Koolau mountains on Oahu. Any showers will be slow moving and could become anchored over the terrain, which could bring the threat of flash flooding.
For Friday, the upper level trough centered near Kauai in the morning will begin to move eastward and will bring an unstable environment across the state by Friday afternoon. Latest guidance is showing 500 mb temps ranging from -12C to -15C across the state with lapse rates greater than 7C/km in the low to mid levels of the atmosphere. CAPE values greater than 1000 J/kg with bulk shear values of around 40 knots should be enough to support isolated severe thunderstorms capable of producing large hail and gusty winds of greater than 50 mph. At this time, the best combination of moisture and instability and shear looks to be from Oahu towards the Big Island. Guidance has been fairly consistent with a line of showers and thunderstorms developing south of the islands Friday morning and spreading northeastward during the afternoon.
If this line of showers and thunderstorms were to develop, this very well could lead to the main impactful period on Friday.
The main takeaway for Friday is that we are not looking at a widespread rain event. Rather, we are looking at scattered heavy shower event with isolated strong to possibly severe thunderstorms. We do want to emphasize that flash flooding can occur well downstream from the mountains, where the weather could be fair. Also sudden changes of the weather will be possible. It could be sunny and fair weather one hour and you could be under a severe thunderstorm the next hour. Although not widespread, due to the potential for intense rainfall rates, a Flood Watch should be issued later today for the State of Hawaii.
AVIATION
Light to moderate trades will continue today and gradually weaken tomorrow. Daytime sea breezes and nighttime land breezes are expected over wind-protected leeward areas.
SHRA will continue to favor windward and mauka areas with the greatest coverage and intensity during the late night and early morning time period. MVFR conds are expected with these SHRA. As sea breeze activity resumes by this afternoon, SHRA and low cigs will begin to develop across some leeward/interior locations. In addition, a disturbance aloft will approach the area later today, helping to enhance shower activity across the state and bringing instability that may help to spark a few TS near Kauai sometime tonight into tomorrow morning.
AIRMET Sierra is in effect for mtn obsc across windward areas as a band of moisture moves in from the east.
MARINE
A strong disturbance aloft approaching from the north will bring a threat for strong, possibly severe, thunderstorms late tonight through Saturday. These thunderstorms will have the potential to produce dangerous wind gusts, hail, and frequent lightning. At the surface, a trough to the northwest of Kauai will strengthen and expand southward over the island chain tonight then linger through the weekend. As a result, light east to southeast winds will replace the usual trade wind flow at the surface on Friday and Saturday. Moderate easterly trade winds will gradually rebuild starting Sunday.
A long-lived south swell will affect the islands over the next several days. Surf along south facing shores is expected to hold just below the High Surf Advisory threshold of 10 feet today through Friday, then gradually decline Saturday through Tuesday. A series of overlapping long- period south swells will give another sizable boost to south shore surf Wednesday through late next week. This represents the most sustained south swell of the year.
Otherwise, north shore surf will remain tiny today and tonight, followed by a small reinforcing short-period north-northwest swell late Friday through the weekend. A small long period northwest swell will build Sunday night, giving north shore surf a boost early next week. Surf along east facing shores will be well below normal levels through the middle of next week.
HFO WATCHES/WARNINGS/ADVISORIES
None.
toggle option: (graph/table)
| Airport | Dist | Age | Wind kt | Vis | Sky | Weather | Temp | DewPt | RH | inHg |
| PHKO ELLISON ONIZUKA KONA INTL AT KEAHOLE,HI | 24 sm | 39 min | WNW 14 | 10 sm | Partly Cloudy | 84°F | 70°F | 62% | 29.93 | |
| PHSF BRADSHAW ARMY AIRFIELD,HI | 24 sm | 37 min | W 12G18 | 9 sm | Clear | 70°F | 50°F | 49% | 30.26 |
Tide / Current data from XTide NOT FOR NAVIGATION
Kawaihae, Hawaii Island, Hawaii, Tide feet
Tide / Current data from XTide NOT FOR NAVIGATION
Kailua Kona, Hawaii Island, Hawaii, Tide feet
Kamuela/Honolulu,HI
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