Glenn James
Hawaii Weather Today
Founder and maintainer for 30 years


The latest update to this website was 1232pm Tuesday afternoon HST


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

0.09  Waimea Tank, Kauai 
0.27  Honouliuli, Oahu
0.01  Honolimaloo, Molokai
0.05  Lanai City, Lanai
0.07  Puu Kukui, Maui
0.30  Pahala, Big Island


The following numbers represent the strongest wind gusts (mph) Tuesday afternoon:

14  Moloaa Dairy, Kauai – SW
18  Kuaokala, Oahu – SE
06  Puu Alii, Molokai – SE
07  Lanai 1,  Lanai – S 
15  Hanaula, Maui – NE 
15  South Point, Big Island – NE  


Hawaii’s Mountains – Here’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. Here’s the webcam for the (~10,023 feet high) Haleakala Crater on Maui. 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.

https://weather.gc.ca/data/satellite/goes_gwdisk11_1070_100.jpg

Big Blue…click twice for largest version

 

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/tpw/13/GOES18-TPW-13-900x540.gif

A deep area of low pressure far north…with thunderstorms far south 

 


https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/hi/GEOCOLOR/20261040540-20261041330-GOES18-ABI-HI-GEOCOLOR-600x600.gif

Multi-level clouds moving over the state from the southwest

 

https://radar.weather.gov/ridge/standard/HAWAII_loop.gif

https://radar.weather.gov/ridge/standard/PHKI_loop.gif

https://radar.weather.gov/ridge/standard/PHKM_loop.gif

Showers locally 

 

https://www.weather.gov/wwamap/png/hfo.png

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




~~~ Hawaii Weather Narrative ~~~

 

Glenn’s Tuesday comments:  I’m here in Vancouver, BC, Canada with my friend Bob, continuing on in my working vacation.

415am Hawaii time, it’s cloudy/foggy with light rain, with the temperature a cool 42.9 degrees.

1223pm Hawaii time, it remains cloudy and cool (46.4 degrees), although the light rain has stopped several hours ago. We walked to Whole Foods and had breakfast, and then caught a Lyft ride over to the University of British Columbia, where the Natural History Museum is located. We toured the museum for a while, and then stopped by Geographic Information Systems department, and talked to a couple of people there. We then walked over to the Geography Department and conversed with a couple of folks there. Then we took Lyft back to Whole Foods and had lunch, before walking back to our rental. I’m about ready to have a chocolate chip cookie and wash it down with a small cup of espresso.

 

>>> Highest Temperature Monday, April 13, 2026 – 97 degrees at Rio Grande Village, TX
>>> Lowest Temperature Tuesday, April 14, 2026 –  12 degrees near Manila, UT

 

Hawaii’s Broad Brush Weather Overview…as of 1016am Tuesday morning:  Light to moderate rain continues over the western portion of the state. Periods of showery, somewhat unstable conditions are expected to persist through much of the week. Light and variable winds may also promote localized land and sea breeze development. By the latter half of the week, a return to light east to southeast winds will bring generally quieter weather, however, shower activity could increase by the weekend, as an upper-level trough approaches from the northwest.

Short Term Update…as of 1010am Tuesday morning: This morning`s  models continue to show an increase of showers over Kauai, especially during the afternoon and evening. While rain is expected to increase, rainfall rates will likely remain modest due to the lack of atmospheric dynamics. Even with the lack of dynamics, a few inches of rain will be possible over the next 24 hours for Kauai. Elsewhere across the state, sea breezes will develop by mid-day today, and we should see clouds and showers develop over interior areas this afternoon. With precipitable water values higher than normal, some brief downpours are expected at times this afternoon and evening.

Weather Details for the Hawaiian Islands…as of 341am Tuesday morning: The main shower band has drifted eastward and is now located over Maui County and the Alenuihaha Channel. Rainfall rates from these showers have been producing below a tenth of an inch per hour. The subtropical jet stream, currently located just north of the Hawaiian Islands and drifting southward, will help steer these intermittent shower bands over the area for the next several days. Cloud coverage will also be maintained through much of the week, with noticeably humid conditions.

With the lighter surface winds in the forecast, initially from the southeast before becoming variable, any daytime heating will be enough to trigger land and sea breeze activity. This may bring leeward and interior showers throughout the day, and partial clearing overnight for most of the islands. Toward the latter half of the week, the surface low pressure system, once anchored just north of the islands, will finally dislodge and move northeastward, opening the doors for high pressure to quickly build in its place.

Light trades attempt to develop in response, however, latest model guidance depicts an upper-level trough digging down into the vicinity of the state from the northwest. While not overly impressive, nor super impactful currently, it is expected to limit the strength of the trades. That being said, it is worth keeping an eye on the evolution of the upper-level trough, to determine if it enhances the ongoing shower activity (especially with the lingering moisture-laden airmass across the state), or if it simply passes through.


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 / Looping Surface Precipitation…through the next 8-days

 

Marine Environmental Conditions: A weak surface trough will reside just west of the state through Thursday. This will allow for gentle southeast flow across the waters, and locally moderate easterly flow in the typical windy channels surrounding Maui and the Big Island. Surface high pressure building far north will help tighten the pressure gradient and bring moderate to locally fresh easterly trades across the Hawaiian coastal waters Friday into the weekend.

A small, short-period, northwest swell will continue to slowly diminish through the rest of the week into the weekend. A small, medium-period, south swell has arrived at the near shore buoys and should provide a boost to surf along south facing shores through late week, before gradually subsiding into the weekend. Surf along east facing shores will remain below seasonal average, with lighter than average trade winds near and upstream of the islands through late this week. A slight rise in surf may occur Friday into the weekend with the increase of the easterly flow.

 

r/pics - a rainbow over the ocean.

 Rainy weather locally


World-wide Tropical Cyclone Activity


>>> Here’s a link to the latest Pacific Disaster Center’s Weather Wall


>>> Atlantic Ocean: There are no active tropical cyclones

>>> Caribbean Sea: There are no active tropical cyclones

>>> Gulf of Mexico: There are no active tropical cyclones

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

 

>>> Eastern Pacific: There are no active tropical cyclones

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

>>> Central Pacific: There are no active tropical cyclones

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

 

>>> Northwest Pacific Ocean:

Tropical Cyclone 04W (Sinlaku)…is located approximately 23 NM west of Saipan

https://www.metoc.navy.mil/jtwc/products/04W_141800sair.jpg

 

>>>Southwest Pacific Ocean: There are no active tropical cyclones

>>> North and South Indian Oceans / Arabian Sea: There are no active tropical cyclones



Interesting:  Researchers Predict Melting Glaciers May Threaten Future Water Security

Glaciers in High Mountain Asia — a region encompassing the Tibetan Plateau and its surrounding mountain ranges — are shrinking rapidly, endangering water resources for millions of people, suggests a new study.Using satellite data from NASA’s GRACE missions, results show that these extensive glacier systems, often called the “water towers of Asia,” experienced significant losses in mass between 2002 and 2023. These findings reveal that if the extreme conditions that led to this decline continue, enhanced glacier melt could intensify short-term flood risks and substantially reduce long-term meltwater availability. The researchers say the findings underscore the need for reduced greenhouse gas emissions to stave off glacier melt and preserve a larger fraction of the region’s cryospheric water storage.Because communities in the area often rely on the glacier’s large meltwater stores for hydropower generation, renewable energy and large-scale irrigation systems, any changes in glacier size will have direct implications for local water security, agriculture and natural hazard management, said Jaydeo Dharpure, lead author of the study and a former postdoctoral research associate at the Byrd Polar and Climate Research Center at The Ohio State University.Read more at: Ohio State University