Marine Weather and Tide Forecast for Heeia, HI
May 16, 2024 3:49 PM HST (01:49 UTC) Change Location
 | Sunrise 5:50 AM Sunset 7:04 PM Moonrise 1:38 PM Moonset 1:51 AM |
PHZ116 Kaiwi Channel- 330 Pm Hst Thu May 16 2024
Tonight - South winds 15 to 20 knots. Seas 7 to 8 feet. Wave detail: south southeast 7 feet at 6 seconds, north northwest 7 feet at 11 seconds and south southwest 3 feet at 17 seconds. Showers with isolated Thunderstorms.
Friday - Southeast winds 10 to 15 knots. Seas 5 to 8 feet. Wave detail: north northwest 7 feet at 11 seconds, southeast 5 feet at 6 seconds and south southwest 3 feet at 16 seconds. Scattered showers in the morning. Isolated Thunderstorms. Isolated showers in the afternoon.
Friday night - Southeast winds 10 to 15 knots. Seas 5 to 7 feet. Wave detail: northwest 5 feet at 11 seconds, southeast 4 feet at 6 seconds and south southwest 3 feet at 15 seconds. Scattered showers with isolated Thunderstorms.
Saturday - East winds 10 to 15 knots. Seas 4 to 6 feet. Wave detail: southeast 4 feet at 6 seconds, northwest 4 feet at 10 seconds and south southwest 3 feet at 15 seconds. Isolated showers in the morning, then scattered showers in the afternoon.
Saturday night - East northeast winds 10 to 15 knots, becoming east 15 to 20 knots after midnight. Seas 4 to 6 feet. Wave detail: east southeast 4 feet at 5 seconds, northwest 3 feet at 10 seconds and south 3 feet at 19 seconds. Scattered showers.
Sunday - East southeast winds 10 to 15 knots. Seas 4 to 6 feet. Wave detail: east southeast 4 feet at 6 seconds and south 3 feet at 17 seconds. Scattered showers.
Sunday night - East winds 10 to 15 knots. Seas 4 to 5 feet. Wave detail: east southeast 4 feet at 6 seconds and south 3 feet at 16 seconds. Isolated showers in the evening.
Monday - East winds 10 to 15 knots. Seas 4 to 5 feet. Wave detail: east southeast 4 feet at 5 seconds.
Tuesday - East winds 15 to 20 knots. Seas 4 to 6 feet. Wave detail: east 5 feet at 6 seconds.
winds and seas higher in and near tstms.
winds and seas higher in and near tstms.
PHZ100 330 Pm Hst Thu May 16 2024
Synopsis for hawaiian coastal waters - A kona low will remain far northwest of the area into the weekend, then slowly lift northward and away from the region Sunday through early next week.
FXHW60 PHFO 161931 AFDHFO
Area Forecast Discussion National Weather Service Honolulu HI 931 AM HST Thu May 16 2024
SYNOPSIS
A kona low north of the state will continue drawing unstable tropical moisture from the deep tropics northward over the islands over the next few days. Bands of showers producing moderate to heavy rain and thunderstorms will develop in this tropical air mass and affect most islands through at least Friday. The kona low will begin to drift away from the state this weekend with improving trends over the eastern islands, while enhanced rainfall will linger over the western end of the state into Sunday. All islands will see an improvement in weather conditions next week as trade winds gradually return.
DISCUSSION
A kona low currently centered roughly 600 miles north-northwest of the main Hawaiian Islands will bring widespread impacts to the state over the next few days.
Latest surface analysis this morning shows a stationary front extending from the kona low into the Kauai Channel, with a surface trough roughly 200 miles northwest of Kauai. Surface observations ahead of the frontal boundary show southerly kona winds that are bringing unstable, deep tropical moisture from the tropics over the islands. CIMMS MIMIC Layer precipitable water shows PW values ranging from roughly 1.50 inches to 2.30 inches across the state, with the axis of highest PW located very near Oahu just ahead of the front. Morning radar imagery shows numerous showers moving into the western and central islands from the southwest. Radar- derived instantaneous rainfall rates of 1 to 2 inches per hour suggest that these showers are bringing moderate to heavy rainfall, particularly over Oahu and Molokai, where surface convergence is maximized. Fortunately, these heavy showers are moving rather quickly, which has somewhat limited flooding impacts thus far this morning. However, soils have become saturated with 24 hour rainfall totals over Oahu in the 1-2 inch range for many locations. As showers continue to train over these saturated areas throughout the day, expect flash flooding concerns to amplify and streams to become more responsive to downpours. A Flood Watch remains in effect for most of the state through Friday afternoon, but this will likely need to be adjusted as the event unfolds.
For the rest of the day through Friday, surface convergence and forcing for ascent will be maximized over the smaller islands, with Oahu, Molokai, and Lanai being the islands with the greatest flash flooding threat today due to moderate to heavy showers and thunderstorms and potential training. This focus area is expected to shift westward towards Kauai on Friday, and then linger near the western end of the state throughout the weekend. Hi-res guidance generally agrees with this prognosis, with the FV3, ARW, and HRRR all depicting similar scenarios. HRRR heavy rainfall probabilities and GEFS/ENS model ensembles increase confidence these islands are most likely to see the heaviest rainfall rates over the next couple of days. While flood impacts are also possible for the island of Maui, guidance suggests that the potential for heaviest rain will shift westward towards Kauai by early Friday, lessening the threat for flash flooding for Maui by that time.
The flood threat for the Big Island remains lower than the other islands, therefore, the Big Island is not in the watch at this time. The southeastern slopes could still see moderate to heavy rain during this event, but most of the deep convective showers should remain west of the Big Island.
The medium range forecast guidance shows drier and more stable east to southeasterly winds as the ridge builds in from the east and the kona low drifts northward this weekend. Any delay in the ridge building back in will slow down these improving weather trends this weekend.
Next week, there will be a gradual transition back to a drier weather pattern as high pressure builds in from the east. This will produce a drier and more stable southeasterly wind flow pattern across the islands as the kona low drift farther northward away from the state. Easterly trade winds will begin to return by the middle of next week.
AVIATION
A strong kona low about 600 nm NW of Kauai is pulling tropical moisture out of the south across the state. This will keep the the islands in an active weather pattern through the remainder of the week into the weekend. Moderate to heavy SHRA and possible TS are expected over the western side of the state today and tomorrow.
On the Big Island, SHRA is expected this afternoon into the evening hours. LIFR to MVFR conds expected across the smaller islands especially in heavier SHRA/TS.
AIRMET Sierra is in effect for for mtn obsc for Kauai, Oahu, Molokai, Lanai, Maui and windward Big Island.
AIRMET Sierra for IFR conds over Kauai, Oahu, Molokai and Lanai.
AIRMET Tango is in effect for turb blw 120 N thru E of the Big Island. Conds could spread to Maui later today as gradient tightens.
AIRMET Zulu is in effect for light rime icing from Kauai to Maui in layer 140-FL250.
MARINE
Strong south to southeast winds associated with a kona low north- northwest of the state will persist through Friday for most waters. A shift out of the east to southeast is expected over the weekend through early next week as the low lifts northward and away from the area. A Small Craft Advisory remains in effect for windward and leeward Big Island waters (Hamakua Coast and waters near South Point). Expect rough seas in heavy showers or thunderstorms that develop over the next few days, especially over waters west of Maui County. Seas should remain just below advisory level over exposed Kauai waters as a short-period northwest swell moves through (peaking today through tonight).
Surf along south facing shores will remain up through early next week due to expected overlapping, long-period south-southwest swells. The first swell will rise through the day today, then peak tonight through Friday, likely reaching advisory level. The High Surf Advisory remains in effect for south facing shores through Friday. Expect rough conditions for most south exposures through this period due to a combination of the onshore winds, swell, and periodic heavy showers moving through. As this swell slowly eases over the weekend, a fresh, long-period south-southwest swell will begin to fill in through the day Sunday. This will peak early next week before easing through midweek. Ongoing short-period northwest swell will keep surf along north and west facing shores below advisory thresholds. This swell will linger into Friday, then ease through the weekend. Surf along east facing shores will remain well below average through the weekend. An upward trend is possible next week as the trades return locally and far upstream over the eastern Pacific.
HFO WATCHES/WARNINGS/ADVISORIES
Flood Watch through Friday evening for Kauai, Niihau, Oahu, Molokai, Lanai and Maui.
High Surf Advisory until 6 PM HST Friday for south facing shores of all islands.
Small Craft Advisory until 6 PM HST Friday for Big Island Windward Waters-Big Island Leeward Waters.
Area Forecast Discussion National Weather Service Honolulu HI 931 AM HST Thu May 16 2024
SYNOPSIS
A kona low north of the state will continue drawing unstable tropical moisture from the deep tropics northward over the islands over the next few days. Bands of showers producing moderate to heavy rain and thunderstorms will develop in this tropical air mass and affect most islands through at least Friday. The kona low will begin to drift away from the state this weekend with improving trends over the eastern islands, while enhanced rainfall will linger over the western end of the state into Sunday. All islands will see an improvement in weather conditions next week as trade winds gradually return.
DISCUSSION
A kona low currently centered roughly 600 miles north-northwest of the main Hawaiian Islands will bring widespread impacts to the state over the next few days.
Latest surface analysis this morning shows a stationary front extending from the kona low into the Kauai Channel, with a surface trough roughly 200 miles northwest of Kauai. Surface observations ahead of the frontal boundary show southerly kona winds that are bringing unstable, deep tropical moisture from the tropics over the islands. CIMMS MIMIC Layer precipitable water shows PW values ranging from roughly 1.50 inches to 2.30 inches across the state, with the axis of highest PW located very near Oahu just ahead of the front. Morning radar imagery shows numerous showers moving into the western and central islands from the southwest. Radar- derived instantaneous rainfall rates of 1 to 2 inches per hour suggest that these showers are bringing moderate to heavy rainfall, particularly over Oahu and Molokai, where surface convergence is maximized. Fortunately, these heavy showers are moving rather quickly, which has somewhat limited flooding impacts thus far this morning. However, soils have become saturated with 24 hour rainfall totals over Oahu in the 1-2 inch range for many locations. As showers continue to train over these saturated areas throughout the day, expect flash flooding concerns to amplify and streams to become more responsive to downpours. A Flood Watch remains in effect for most of the state through Friday afternoon, but this will likely need to be adjusted as the event unfolds.
For the rest of the day through Friday, surface convergence and forcing for ascent will be maximized over the smaller islands, with Oahu, Molokai, and Lanai being the islands with the greatest flash flooding threat today due to moderate to heavy showers and thunderstorms and potential training. This focus area is expected to shift westward towards Kauai on Friday, and then linger near the western end of the state throughout the weekend. Hi-res guidance generally agrees with this prognosis, with the FV3, ARW, and HRRR all depicting similar scenarios. HRRR heavy rainfall probabilities and GEFS/ENS model ensembles increase confidence these islands are most likely to see the heaviest rainfall rates over the next couple of days. While flood impacts are also possible for the island of Maui, guidance suggests that the potential for heaviest rain will shift westward towards Kauai by early Friday, lessening the threat for flash flooding for Maui by that time.
The flood threat for the Big Island remains lower than the other islands, therefore, the Big Island is not in the watch at this time. The southeastern slopes could still see moderate to heavy rain during this event, but most of the deep convective showers should remain west of the Big Island.
The medium range forecast guidance shows drier and more stable east to southeasterly winds as the ridge builds in from the east and the kona low drifts northward this weekend. Any delay in the ridge building back in will slow down these improving weather trends this weekend.
Next week, there will be a gradual transition back to a drier weather pattern as high pressure builds in from the east. This will produce a drier and more stable southeasterly wind flow pattern across the islands as the kona low drift farther northward away from the state. Easterly trade winds will begin to return by the middle of next week.
AVIATION
A strong kona low about 600 nm NW of Kauai is pulling tropical moisture out of the south across the state. This will keep the the islands in an active weather pattern through the remainder of the week into the weekend. Moderate to heavy SHRA and possible TS are expected over the western side of the state today and tomorrow.
On the Big Island, SHRA is expected this afternoon into the evening hours. LIFR to MVFR conds expected across the smaller islands especially in heavier SHRA/TS.
AIRMET Sierra is in effect for for mtn obsc for Kauai, Oahu, Molokai, Lanai, Maui and windward Big Island.
AIRMET Sierra for IFR conds over Kauai, Oahu, Molokai and Lanai.
AIRMET Tango is in effect for turb blw 120 N thru E of the Big Island. Conds could spread to Maui later today as gradient tightens.
AIRMET Zulu is in effect for light rime icing from Kauai to Maui in layer 140-FL250.
MARINE
Strong south to southeast winds associated with a kona low north- northwest of the state will persist through Friday for most waters. A shift out of the east to southeast is expected over the weekend through early next week as the low lifts northward and away from the area. A Small Craft Advisory remains in effect for windward and leeward Big Island waters (Hamakua Coast and waters near South Point). Expect rough seas in heavy showers or thunderstorms that develop over the next few days, especially over waters west of Maui County. Seas should remain just below advisory level over exposed Kauai waters as a short-period northwest swell moves through (peaking today through tonight).
Surf along south facing shores will remain up through early next week due to expected overlapping, long-period south-southwest swells. The first swell will rise through the day today, then peak tonight through Friday, likely reaching advisory level. The High Surf Advisory remains in effect for south facing shores through Friday. Expect rough conditions for most south exposures through this period due to a combination of the onshore winds, swell, and periodic heavy showers moving through. As this swell slowly eases over the weekend, a fresh, long-period south-southwest swell will begin to fill in through the day Sunday. This will peak early next week before easing through midweek. Ongoing short-period northwest swell will keep surf along north and west facing shores below advisory thresholds. This swell will linger into Friday, then ease through the weekend. Surf along east facing shores will remain well below average through the weekend. An upward trend is possible next week as the trades return locally and far upstream over the eastern Pacific.
HFO WATCHES/WARNINGS/ADVISORIES
Flood Watch through Friday evening for Kauai, Niihau, Oahu, Molokai, Lanai and Maui.
High Surf Advisory until 6 PM HST Friday for south facing shores of all islands.
Small Craft Advisory until 6 PM HST Friday for Big Island Windward Waters-Big Island Leeward Waters.
| Stations | Dist | Age | Wind | Air Temp | Water Temp | Waves | inHg | DewPt |
| MOKH1 - 1612480 - Mokuoloe, HI | 1 mi | 74 min | 0G | 77°F | 80°F | 29.81 | ||
| 51207 | 4 mi | 54 min | 76°F | 4 ft | ||||
| 51210 | 4 mi | 24 min | 75°F | 5 ft | ||||
| 51202 - Mokapu Point, HI (098) | 7 mi | 24 min | 77°F | 5 ft | ||||
| OOUH1 - 1612340 - Honolulu, HI | 10 mi | 50 min | SSW 6G | 75°F | 79°F | 29.84 | ||
| PRHH1 | 10 mi | 50 min | SSE 8G | 76°F | 29.83 | |||
| 51211 | 13 mi | 50 min | 78°F | 6 ft | ||||
| 51212 | 20 mi | 50 min | 75°F | 77°F | 6 ft | |||
| 51201 - Waimea Bay, HI (106) | 23 mi | 34 min | 76°F | 6 ft |
toggle option: (graph/table)
| Airport | Dist | Age | Wind kt | Vis | Sky | Weather | Temp | DewPt | RH | inHg |
| PHNG KANEOHE BAY MCAS (MARION E CARL FIELD),HI | 2 sm | 52 min | S 05 | 10 sm | Overcast | Lt Rain | 81°F | 72°F | 74% | 29.79 |
| PHNL DANIEL K INOUYE INTL,HI | 10 sm | 56 min | SSW 09 | 10 sm | Mostly Cloudy | 75°F | 73°F | 94% | 29.83 | |
| PHHI WHEELER AAF,HI | 12 sm | 44 min | S 08 | 4 sm | Mostly Cloudy | Lt Rain Mist | 72°F | 70°F | 94% | 29.85 |
| PHJR KALAELOA (JOHN RODGERS FIELD),HI | 16 sm | 16 min | S 11 | 10 sm | Overcast | Lt Rain | 75°F | 72°F | 89% | 29.84 |
Tide / Current for Honolulu, Honolulu Harbor, Oahu Island, Hawaii
EDIT Weekend mode (on/off) HIDE Help
Tide / Current data from XTide NOT FOR NAVIGATION
Honolulu, Honolulu Harbor, Oahu Island, Hawaii, Tide feet
Hanauma Bay
Click for Map
Thu -- 01:50 AM HST Moonset
Thu -- 05:31 AM HST -0.03 feet Low Tide
Thu -- 05:51 AM HST Sunrise
Thu -- 11:46 AM HST 0.88 feet High Tide
Thu -- 01:37 PM HST Moonrise
Thu -- 04:45 PM HST 0.52 feet Low Tide
Thu -- 07:02 PM HST Sunset
Thu -- 10:38 PM HST 1.29 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Thu -- 01:50 AM HST Moonset
Thu -- 05:31 AM HST -0.03 feet Low Tide
Thu -- 05:51 AM HST Sunrise
Thu -- 11:46 AM HST 0.88 feet High Tide
Thu -- 01:37 PM HST Moonrise
Thu -- 04:45 PM HST 0.52 feet Low Tide
Thu -- 07:02 PM HST Sunset
Thu -- 10:38 PM HST 1.29 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Hanauma Bay, Oahu Island, Hawaii, Tide feet
| 12 am |
| 1.2 |
| 1 am |
| 0.9 |
| 2 am |
| 0.6 |
| 3 am |
| 0.3 |
| 4 am |
| 0.1 |
| 5 am |
| -0 |
| 6 am |
| -0 |
| 7 am |
| 0.1 |
| 8 am |
| 0.3 |
| 9 am |
| 0.5 |
| 10 am |
| 0.7 |
| 11 am |
| 0.9 |
| 12 pm |
| 0.9 |
| 1 pm |
| 0.8 |
| 2 pm |
| 0.7 |
| 3 pm |
| 0.6 |
| 4 pm |
| 0.5 |
| 5 pm |
| 0.5 |
| 6 pm |
| 0.6 |
| 7 pm |
| 0.7 |
| 8 pm |
| 0.9 |
| 9 pm |
| 1.1 |
| 10 pm |
| 1.3 |
| 11 pm |
| 1.3 |
Molokai/Honolulu,HI
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