Last update to this website was at 810pm Wednesday evening, April 21, 2021

Air Temperatures – The following high temperatures (F) were recorded across the state of Hawaii Wednesday afternoon…along with these low temperatures Wednesday morning:

80 67  Lihue, Kauai
88 – 70  Honolulu, Oahu
85 – 64  Molokai AP
86 – 66  Kahului AP
84 – 75  Kona AP, Hawaii
8671  Hilo, Hawaii

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

1.05  Mount Waialeale, Kauai
0.03  Palehua, Oahu
0.00  Molokai
0.00  Lanai
0.00  Kahoolawe
0.00  Maui
1.65  Waiaha, Big Island

The following numbers represent the strongest wind gusts (mph) Wednesday evening:

10  Waimea Heights, Kauai
15  Honolulu Harbor, Oahu
04  Molokai
25  Lanai
27  Kahoolawe
24  Kahului Harbor, Maui
21  Upolu AP, 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. 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.
The high and middle level clouds are gone…although there are a few more approaching from the west
Clear to partly cloudy…a few cloudy areas
   Our winds are quite light…at least in most areas

Just a few showers locally

Model showing precipitation
through 8-days (you can slow this animation down)
Hawaii is on the 3rd line down from the top…and the 1st line to the right of the middle line (lightning is the blue dots)

Please click this link…to see current Watches, Warnings and Advisories noted above

~~~ Hawaii Weather Narrative ~~~


>>> Glenn’s Wednesday comments: My low temperature this morning here in upper Kula, Maui was 55.5 degrees

622am, it’s still voggy here on Maui, with a thin veil of high cirrus clouds overhead.

1119am, the high clouds have given way to lots of low clouds now…with still lots of vog around too.

239pm, the breezes are stronger, with lots of sunshine, and somewhat less vog around this afternoon…we’re heading in the right direction as far as vog is concerned.

Super sunny afternoon, I mean like a mid-summer day…or even sunnier than that!

6pm, sunny with an air temperature of 75 degrees…which is very warm for this time of day.

A gorgeous pink late sunset, with a bank of gray low clouds just down the mountain from here in upper Kula…as the temperature has dropped quickly to 60.6 degrees at 715pm. At the same time, I also see a growing and bright 1/2 full moon…directly overhead at the time of this writing.

810pm, clear with a temperature of 56.4 degrees

Broad Brush Overview: The higher level clouds will gradually diminish going forward. Leeward sea breezes will support upcountry clouds and a few showers for the time being. Strengthening trade winds and a more typical trade wind weather pattern will return by the end of the week.

Details: Overcast middle and high level cloudiness is gradually thinning and slowly shifting southward. Afternoon leeward sea breezes should have a pretty easy time generating afternoon cloud build-ups, and a even few showers over inland upcountry areas.

We will see similar conditions Thursday, although the gradual increase in trades reduces the likelihood of sea breeze development. Thus, showers may instead manifest in more typical trade wind fashion by Thursday afternoon…especially for Oahu, Maui County and the Big Island.

Looking Further Ahead: Locally strong trades will return by week’s end, as high pressure becomes established well to the north of the island chain. There is strong model consensus that the weak trough currently northwest, will push toward the islands, eventually relocating near or directly over the state this weekend.

The resulting reduction in stability of our atmosphere, will support a wetter trade wind pattern for the weekend. Low confidence with respect to the development of this low, in turn results in higher than normal forecast uncertainty by early next week…stay tuned for more details.

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.  Here’s the animated volcanic emissions graphic

Marine Environmental Conditions: A trough northwest of Kauai will gradually dissipate through Friday. In doing so, light trade winds are expected to spread westward from Maui and the Big Island. A surface high is forecast to pass north of the islands Thursday through Friday, resulting in a boost in the trade winds with speeds becoming locally strong for especially the nearshore areas of Maui County, and waters south of the Big Island. These trades will persist through Sunday…followed by a drop off Sunday night into Monday.

A small to moderate northwest swell will lead to a rise in surf along the north and west shores. This swell will peak Thursday, followed by a gradual decline through Friday. A small to moderate west-northwest swell is expected to arrive next week Monday night and peak Tuesday…followed by a slow decline.

A continuous stream of small swells from the south and southwest will maintain small surf for the south shores throughout the forecast period. The return of the trade wind means the surf along the east facing shores will be on the rise Friday and Saturday when the trades turn stronger. Expect surf to build to small to moderate heights. Surf along the east facing shores will be on the downtrend Monday as the trade winds weaken.


World-wide Tropical Cyclone Activity


>>> Here’s a link to the latest Pacific Disaster Center’s Weather Wall…covering the Pacific and Indian Oceans


Atlantic Ocean: Routine issuance of the Tropical Weather Outlook will resume on June 1, 2021. During the off-season, Special Tropical Weather Outlooks will be issued as conditions warrant.

Caribbean: Routine issuance of the Tropical Weather Outlook will resume on June 1, 2021. During the off-season, Special Tropical Weather Outlooks will be issued as conditions warrant.

Gulf of Mexico: Routine issuance of the Tropical Weather Outlook will resume on June 1, 2021. During the off-season, Special Tropical Weather Outlooks will be issued as conditions warrant.

Eastern Pacific: Routine issuance of the Tropical Weather Outlook will resume on May 15, 2021. During the off-season, Special Tropical Weather Outlooks will be issued as conditions warrant.

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

Central Pacific: Routine issuance of the Tropical Weather Outlook will resume on June 1, 2021. During the off-season, Special Tropical Weather Outlooks will be issued as conditions warrant.

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

Northwest Pacific Ocean: 

Typhoon 02W (Surigae) is located 378 NM northeast of Manila, Philippines

South Pacific Ocean: There are no active tropical cyclones

North and South Indian Oceans / Arabian Sea: 

Tropical Cyclone 29S (Jobo) is located 513 NM north of Antananarivo, Madagascar

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

Interesting: Tonight…The first major meteor shower since January is coming to a sky near you over the next few nights – and the peak will be in the predawn hours of Thursday, Earth Day.

The Lyrids have been observed for more than 2,700 years, NASA said, making them one of the oldest known showers.  The first recorded sighting of a Lyrid meteor shower goes back to 687 B.C. in China. Observers there said the Lyrids were “falling like rain.”


Surigae Stirs Up the Pacific

The super typhoon reached extreme intensity earlier in the year than any storm in the satellite era.

Surigae is not expected to make landfall, but the typhoon churning in the Western Pacific Ocean is already a significant storm. When the storm rapidly intensified to category 5 strength on April 17, 2021, it marked the earliest date in the year that any storm in the Northern Hemisphere had reached such intensity in modern record-keeping.

Surigae (known as Bising in the Philippines) is the first typhoon of the 2021 season in the northwest Pacific and the second named storm. According to the U.S. Joint Typhoon Warning Center (JTWC), the super typhoon reached sustained winds of 165 knots (190 miles per hour) in the early afternoon on April 17. According to the Japan Meteorological Agency, the central pressure inside the storm dropped to 895 millibars, one of the lowest readings ever recorded.

The typhoon is expected to curve and stay offshore, but its outer bands have been lashing the central and northern Philippine islands with heavy rain, gusty winds, and coastal flooding. At least one person has died and nearly 100,000 have evacuated coastal areas.

Typhoon season in the Western Pacific generally peaks from July through October, according to the Philippine Atmospheric, Geophysical, and Astronomical Services Administration. On average, 20 tropical cyclones form in the region every year, and eight or nine cross the Philippines.

“The large-scale environment for typhoon formation in the northwest Pacific is more favorable than it was last year,” noted meteorologist Jeff Masters. “More warm water is present, and La Niña is now fading toward neutral conditions.”