The latest update to this website was at 552am Tuesday morning (HST)


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

1.03  Mount Waialeale, Kauai
0.45  Tunnel RG, Oahu

0.22  Puu Alii, Molokai
0.00  Lanai
0.98  Puu Kukui, Maui
0.96  Kawainui Stream, Big Island

The following numbers represent the strongest wind gusts (mph) as of Tuesday morning:

17  Nawiliwili, Kauai
27  Oahu Forest NWR, Oahu
29  Makapulapai, Molokai
23  Lanai 1, Lanai
28  Maalaea Bay, Maui
28  Kealakomo, 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 

Cold front far northwest
(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 Tuesday comments: I’m home here in upper Kula, Maui, Hawaii

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

534am, it’s mostly clear early this morning here in Kula, with a chilly low temperature of 51.5 degrees at my place.


Hawaii’s Broad Brush Weather Overview:  Surface high pressure north of the state will maintain breezy trade winds through tonight, with trades strengthening into the breezy to strong range Wednesday through the weekend. Fairly typical windward and mountain focused shower activity is expected through much of the week. Remnants of an old front could increase windward shower activity late Friday into Saturday.

Hawaii’s Weather Details:  A weak upper-level low, centered a couple hundred miles southeast of Oahu, continues to send high clouds northward across the eastern half of the state. Expecting a fairly typical trade weather pattern through Tuesday night, with breezy wind speeds and passing showers focused on the windward and mountain areas. Shower activity will be slightly higher than usual, due to the upper low, with some moderate showers possible over windward areas at times, mainly during the overnight and early morning hours.

As the upper-level low gradually moves westward and weakens over the next few days, we should see inversions lowering, with drier conditions around mid-week. Beginning Wednesday into Thursday, the surface high centered far north of the state will strengthen, increasing the trade wind speeds into the breezy to strong range during the second half of the week and into the weekend.

The weather models are showing an area of enhanced moisture, associated with an old frontal boundary, riding in on the trades toward the end of this week. This could produce enhanced windward showers 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:  Fresh to strong easterly trades will strengthen through the second half of the week, as the surface ridge builds north of the state. This has resulted in the Small Craft Advisory expanding up the island chain from the typically windier waters around Maui County and the Big Island.  Seas will quickly respond and build to the advisory level across the Alenuihaha Channel and waters near South Point beginning Wednesday.

Surf along south-facing shores continues to ease, and that trend will persist. Expect mainly background south to south-southwest pulses moving through until Friday. A slight upward trend is possible by the end of the weekend from a small south swell. Guidance shows this arriving Saturday night into Sunday, then lingering into early next week.

Surf along east-facing shores will hold around average, then gradually trend up through the second half of the week, due to the aforementioned trades strengthening locally and upstream of the islands over the eastern Pacific.

Surf along north-facing shores will return to the typical summertime (flat) levels through mid-week as a small northwest swell moves out. As the trades increase, some northern exposures could see a gradual increase later this week.


Vibrant Hula Dancing with Colorful Costumes and Lush Greenery



World-wide Tropical Cyclone Activity


Atlantic Ocean: There are no active tropical cyclone

Southwestern Atlantic Ocean

>>>  An area of cloudiness and showers 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 percent

Caribbean Sea: There are no active tropical cyclones

Gulf of Mexico:  

Southwestern Gulf of Mexico…

Potential Tropical Cyclone One Advisory Number 4

Official Forecast


Located about 410 miles southeast of Brownsville, Texas

The system is moving toward the north near 7 mph. A turn toward the northwest and west with an increase in forward speed is expected tonight and on Wednesday, and the system is forecast to reach the Gulf coast of Mexico by Wednesday night.

Maximum sustained winds are near 40 mph with higher gusts. Some increase in strength is likely during the next 36 hours, and the disturbance is forecast 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 north 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 tonight or 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:  Research Finds Dolphins With Elevated Mercury Levels in Florida and Georgia

In a study with potential implications for the oceans and human health, scientists reported elevated mercury levels in dolphins in the U.S. Southeast, with the greatest levels found in dolphins in Florida’s St. Joseph and Choctawhatchee Bays.

Dolphins are considered a “sentinel species” for oceans and human health because, like us, they are high up in the food chain, live long lives, and share certain physiological traits with humans. Some staples of their diet, such as spot, croaker, weakfish and other small fish, are most vulnerable to mercury pollution and are also eaten by people.

The study, which appeared in the journal Toxics, drew no conclusions about Florida and Georgia residents’ mercury levels or the potential health risks to humans. It did, however, cite previous research by a different group of researchers that found a correlation between high mercury levels in dolphins in Florida’s Indian River Lagoon and humans living in the area.

“As a sentinel species, the bottlenose dolphin data presented here can direct future studies to evaluate mercury exposure to human residents” in the Southeast and other potentially affected areas in the United States, the authors of the study in Toxics wrote.

Read more at National Institute of Standards and Technology (NIST)