The latest update to this website was at 855pm Monday evening (HST)


Here are the latest 24-hour precipitation totals (inches) for each of the islands as of Monday evening:

1.03  Mount Waialeale, Kauai
1.03  Manoa Lyon Arboretum, Oahu

0.38  Puu Alii, Molokai
0.00  Lanai
2.57  Puu Kukui, Maui
1.21  Kawainui Stream, Big Island

The following numbers represent the strongest wind gusts (mph) as of Monday evening:

27  Port Allen, Kauai
35  Oahu Forest NWR, Oahu
29  Makapulapai, Molokai
27  Lanai 1, Lanai
27  Maalaea Bay, Maui
30  Waikoloa, Big Island

Hawaii’s MountainsHere’s a link to the live webcam on the summit of our tallest mountain Mauna Kea (~13,800 feet high) on the Big Island of Hawaii. These webcams are available during the daylight hours here in the islands, and at night whenever there’s a big moon shining down. Also, at night you will be able to see the stars, and the sunrise and sunset too…depending upon weather conditions.

Big Blue…click twice for largest version 

Thunderstorm far south of the state
(click for larger version)

Variable clouds across the state…high clouds coming up from the south

Low clouds being carried our way on the trade wind flow

Localized showers

Kauai and Oahu (Satellite)

Kauai and Oahu (Radar)

Oahu and Maui County (Satellite)

Oahu and Maui County (Radar)

 Maui, Kahoolawe, Lanai, and the Big Island (Satellite)

Maui County and the Big Island (Radar)

Big Island (Radar)


Model showing precipitation through 8-days (you can slow this animation down)

Please open this link to see details on any current Watches, Warnings and Advisories noted above


~~~ Hawaii Weather Narrative ~~~


Glenn’s Monday comments: I’m home here in upper Kula, Maui, Hawaii

Good day everyone, I hope you have a great Monday wherever you happen to be spending it.

545am, it’s partly cloudy early this morning here in Kula, with a low temperature of 54.5 degrees at my place.

729am, lots of clouds around this morning, with a variety of higher and lower level clouds. It’s dry here in upper Kula, while it looks like there may be a few showers over along the windward side.

12pm, still cloudy up the mountain, although the beaches remain quite sunny early this afternoon.

305pm, partly cloudy for the most part, and locally windy, especially along the windward sides…and Maalaea Bay here on Maui.

630pm, still partly cloudy with a mix of high and lower level clouds, it’s rather windy along the windward sides, although mostly calm up here in Kula. My high temperature was 77.5 degrees.

855pm, its cloudy with a temperature of 64.4 degrees here at my Kula weather tower.


Hawaii’s Broad Brush Weather Overview:  A high pressure ridge north of the state will maintain breezy trade winds through Tuesday, with trades strengthening Wednesday onward. Breezy to strong trade winds are expected Wednesday through the weekend.

A weak upper low over the state will help produce periods of showers mainly over the windward and mountain areas through Tuesday. Drier conditions are briefly expected Wednesday with scattered showers returning Thursday. Remnants of an old front will likely increase shower activity late Friday into Saturday.

Hawaii’s Weather Details:  A weak upper level low over the state has raised the inversion heights slightly and the soundings from Lihue and Hilo show the trade wind inversion just over 7,000 ft. With the slightly higher inversion, we are seeing a little more showers across the state, but shower intensity remains on the light side for the most part.

For the rest of today and through Tuesday, we should be in a fairly similar weather pattern with breezy trade winds and passing showers. Showery activity will be slightly higher than our typical summer day due to the upper level low, with some moderate showers possible over windward areas.

As the upper level low gradually moves westward over the next few days, we should see drier conditions with lower inversions by Wednesday. Starting Wednesday into Thursday, the high centered far north of the state will strengthen and will increase the trade wind speeds. Breezy to strong trades are expected during the second half of the week and it may even strengthen a little more this weekend.

Overall a windy weekend is expected and it could reach wind advisory threshold for select areas, especially the windier zones around Maui County and the Big Island. On Friday, models are showing moisture associated with an old frontal boundary riding in with the trade winds, which could produce showery weather especially across select windward areas late Friday into Saturday.

Here’s a near real-time Wind Profile of the Pacific Ocean – along with a Closer View of the islands / Here’s the latest Weather Map / Vog map animation

Hawaii’s Marine Environment:  Surface high pressure will remain north-northeast of the area, then gradually strengthen during the second half of the week. As a result, the trades will become fresh to locally strong, with near-gale winds in the Alenuihaha Channel and waters south of the Big Island beginning Wednesday.

The Small Craft Advisory (SCA), currently in effect for the normally windier areas around Maui County and the Big Island, will likely continue through the week, with an expansion to include the waters around Kauai and Oahu on Wednesday.

Surf along south facing shores will continue to slowly decline as the south swell fades. For the rest of the week, expect only background small south to southeast swell energy moving through the local waters.

North shore surf is expected to be small through the week, coming from small northwest swells. Surf along east shores will become increasingly rough and choppy Wednesday onward, as the trade winds strengthen across the state.


Hula is the Art of Hawaiian Dance Expressing All We See, Hear, Smell, Taste, Touch and Feel — Halau i Ka Pono



World-wide Tropical Cyclone Activity


Atlantic Ocean: There are no active tropical cyclone

Southwestern Atlantic Ocean

>>>  An area of cloudiness and thunderstorms located several hundred miles east of the Bahamas is associated with a surface trough and an upper-level area of low pressure. Environmental conditions could be conducive for some gradual development of this system during the next few days while it moves westward or west- northwestward. The system is forecast to approach the coast of the southeastern United States on Friday.

* Formation chance through 48 hours…low…10 percent
* Formation chance through 7 days…low…20 percen

Caribbean Sea: There are no active tropical cyclones

Gulf of Mexico:  

Southwestern Gulf of Mexico…

Potential Tropical Cyclone One Advisory Number 2

Official Forecast


Located about 450 miles southeast of Brownsville, Texas

The system is moving toward the north near 7 mph. A turn toward the west-northwest is expected Tuesday night or Wednesday, and the system is likely to approach the western Gulf coast late Wednesday.

Maximum sustained winds remain near 40 mph with higher gusts. The disturbance is forecast to to become a tropical storm by Wednesday.

The disturbance is quite large with tropical-storm-force winds extending outward up to 290 miles to the northeast of the center.

* Formation chance through 48 hours…high…80 percent
* Formation chance through 7 days…high…80 percent


RAINFALL: Potential Tropical Cyclone One is expected to produce rainfall totals of 5 to 10 inches across northeast Mexico into South Texas, with maximum totals of 15 inches possible. This rainfall will likely produce flash and urban flooding along with new and renewed river flooding. Mudslides are also possible in areas of higher terrain across northeast Mexico.

STORM SURGE: The combination of a dangerous storm surge and the tide will cause normally dry areas near the coast to be flooded by rising waters moving inland from the shoreline. The water could reach the following heights above ground somewhere in the indicated areas if the peak surge occurs at the time of high tide…

Sargent, TX to Sabine Pass, TX…2-4 ft
Galveston Bay…2-4 ft
Mouth of the Rio Grande, TX to Sargent, TX…1-3 ft
Sabine Pass, TX to Vermilion/Cameron Parish Line, LA…1-3 ft

The deepest water will occur along the immediate coast near and to the north of the landfall location, where the surge will be accompanied by large and dangerous waves. Surge-related flooding depends on the relative timing of the surge and the tidal cycle, and can vary greatly over short distances. In Mexico, minor coastal flooding is possible north of where the center of the disturbance crosses the coast in areas of onshore winds.

WIND:   Tropical storm conditions are possible within the watch area by Wednesday.

Southwestern Gulf of Mexico…

>>>  Another broad area of low pressure is forecast to develop over the southwestern Gulf of Mexico this weekend. Environmental conditions are expected to be conducive for gradual development of this system early next week while it moves slowly northward or northwestward.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…low…20 percent

Northeastern Pacific: There are no active tropical cyclones

Here’s the link to the National Hurricane Center (NHC)

North Central Pacific:  There are no active tropical cyclones

>>> Tropical cyclone formation is not expected during the next 7 days

Here’s the link to the Central Pacific Hurricane Center (CPHC)

Northwest Pacific Ocean:  There are no active tropical cyclones

Southwest Pacific Ocean:  There are no active tropical cyclones

North and South Indian Ocean:  There are no active tropical cyclones

Arabian Sea:  There are no active tropical cyclones

Here’s a link to the Joint Typhoon Warning Center (JTWC)

>>> Here’s a link to the Pacific Disaster Center’s (PDC Global) Weather Wall website


Interesting:  Ancient Ocean Slowdown Warns of Future Climate Chaos

When it comes to the ocean’s response to global warming, we’re not in entirely uncharted waters. A UC Riverside study shows that episodes of extreme heat in Earth’s past caused the exchange of waters from the surface to the deep ocean to decline.

This system has been described as the “global conveyer belt,” because it redistributes heat around the globe through the movement of the ocean waters, making large portions of the planet habitable.

Using tiny, fossilized shells recovered from ancient deep-sea sediments, the study in the Proceedings of the National Academy of Sciences demonstrates how the conveyor belt responded around 50 million years ago.

Read more at: University of California – Riverside