The latest update to this website was at 605pm Thursday evening (HST)

 

Here are the highest temperatures Thursday afternoon…and the lowest Thursday morning:

80 / 66  Lihue AP, Kauai
m / m   Honolulu AP, Oahu
81 / 65  Molokai AP, Molokai
83 / 70  Kahului AP, Maui
82 / 70  Kona AP, Big Island
78 / 67  Hilo AP, Big Island

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

0.02  Mount Waialeale, Kauai
0.03  Manoa Lyon Aboretum, Oahu
0.00  Molokai
0.00  Lanai 1, Lanai
0.34  West Wailuaiki, Maui
1.21  Kawainui Stream, Big Island

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

25  Port Allen, Kauai
30  Oahu Forest NWR, Oahu
24  Makapulapai, Molokai
27  Lanai 1, Lanai
23  Kahului AP, Maui
28  Waikoloa, Big Island

Hawaii’s Mountains – Here’s a link to the live webcams on the summit of our tallest mountain Mauna Kea (~13,800 feet high) on the Big Island of Hawaii, and atop the Haleakala Crater (~10,023 feet) 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/GOES17/ABI/SECTOR/tpw/13/GOES17-TPW-13-900x540.gif 

 Cold front northwest…thunderstorms far south in the deeper tropics
(click for larger version)

 


https://cdn.star.nesdis.noaa.gov/GOES17/ABI/SECTOR/hi/GEOCOLOR/GOES17-HI-GEOCOLOR-600x600.gif

Variable low clouds across the state locally

 

https://cdn.star.nesdis.noaa.gov/GOES17/ABI/SECTOR/hi/13/GOES17-HI-13-600x600.gif

High clouds increasing from the northwest

 

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

Localized showers…not many

 

https://www.weather.gov/images/hfo/satellite/Kauai_VIS_loop.gif

Kauai and Oahu (Satellite)

 

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

Kauai and Oahu (Radar)

 

https://www.weather.gov/images/hfo/satellite/Oahu-Maui_VIS_loop.gif

Oahu and Maui County (Satellite)

 

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

Oahu and Maui County (Radar)

 

https://www.weather.gov/images/hfo/satellite/Hawaii_VIS_loop.gif

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

 

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

Maui County and the Big Island (Radar)

 

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

Big Island (Radar)

 

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

 

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

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

 

https://www.weather.gov/images/hfo/graphics/pmsl.gif

~~~ Hawaii Weather Narrative ~~~

 

Glenn’s Thursday comments:  I’m here in Corte Madera, California, visiting my good friend Linda.  I hope you have a good Thursday wherever you happen to be spending it.

It’s cloudy here in Marin County with light showers, with a low temperature of 54.5 degrees in Linda’s backyard.

We have what’s called an Atmospheric River moving through northern California! It’s been off and on gusty with light to moderate rain falling over the last 30 hours!

Here in Marin County the rain is suppose to intensify early Friday morning into Saturday morning, along with strong and gusty winds, in association with a cold front pushing through the area.

 

Hawaii’s Broad Brush Weather Overview:  Gradually diminishing trade winds will deliver just a few light showers to windward areas of the smaller islands, while windward Maui and the Big Island will continue to receive passing showers.

Light and variable winds and mostly dry weather are expected statewide tonight into Sunday. A weak front may move over the islands from the northwest late this weekend. This front is expected to bring little in the way of rainfall, however, and winds will remain light through much of next week.

Hawaii’s Weather Details:  High pressure centered north of Honolulu will continue to weaken and sag south. As it does so, it will maintain light to moderate northeast trade winds, that will weaken overnight to become light and variable by morning. While most of the state will continue to remain dry with only a few light isolated showers moving into windward areas, increased low level moisture continues to stream into windward Big Island and Maui, bringing scattered showers to those areas.

Upper air soundings showed persistent stable conditions at Lihue with a precipitable water value of 0.89″ and a strong temperature inversion around 5,000 feet. At Hilo, inversion heights continue to be higher at around 9,000 feet and precipitable water was measured at 1.32″, which once again makes sense based on the increased shower activity around this area.

As land breezes develop across most of the island chain tonight, shower activity will remain minimal for the smaller islands and begin to diminish across Maui and the Big Island. While low clouds are expected to clear out overnight, high clouds will begin to build in from the northwest as a jet stream moves overhead into Friday.

Background winds will remain light through the weekend as the surface high moves overhead and dissipates, with land and sea breeze activity expected. With little available moisture, shower activity will remain limited through the weekend, with only light isolated to possibly scattered showers expected with the afternoon sea breezes.

Forecast details become a bit uncertain heading into next week, as the models differ in how they handle a weak front that is expected to approach from the northwest. However, they seem to have come into slightly better agreement. According to the latest outlook, it looks like the weak front will approach Kauai’s doorstep Sunday night, then dissipate as it gradually moves towards Oahu and Maui on Monday and Tuesday.

Impacts look to be minimal with light to moderate northerly winds moving in with the front, along with the potential for a slight increase in shower activity for the western end of the state, but the bulk of the moisture associated with the front should remain to the east of the island chain.

Unrelated to the front, low level tropical moisture moving in to windward Big Island will bring a slight increase in shower activity for that end of the state, from late this weekend through early next week. High pressure will then settle in across the state behind the dissipated front on Wednesday, bringing a return to light to moderate easterly trades heading into the latter part of the week.

Fire weather:  An overall dry weather pattern is expected for the next several days. With this dry air moving overhead, relative humidity values will have the potential to reach the critical 45% threshold late mornings through the afternoons each day through Sunday. Fortunately, however, weak trade winds will mitigate fire weather concerns through the rest of this week.

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:  Weak surface high pressure will settle in over the far north offshore waters. This will create and maintain primarily gentle to locally moderate trades winds through the rest of the week. The west-to-east orientated ridge axis will reach the northern coastal waters by Friday. This will result in continued light to gentle east to variable breezes, with slightly stronger winds in the Alenuihaha Channel and south of Big Island. Light winds are favored ahead of the approach of a weak front nearing Kauai on Sunday. This shallow frontal passage will disrupt trade flow as weak gentle easterly breezes veer northwest then northeast.

No significant swells are expected through early Friday, as trade wind waves continue to gradually subside and result in a more calm sea state. Nearshore windward buoys are observing a trade wind swell that will further decline throughout the remainder of the week, as a result of the light trades.

A series of northwest and north-northeast swells are due within a couple of days. A tiny northwest (320 degree) swell is being observed at the nearshore buoys as it moves around the islands. This swell will level out and then continue through Friday. A larger northwest (310-320 degree) swell developing from a pair of lows far northwest of the islands is scheduled to travel through this weekend and peak Sunday. A smaller reinforcing northwest pulse (320 degree) is due Monday and Tuesday.

A small north (010-020 degree) swell will slowly build in and hold Friday and Saturday. A very large, powerful storm force low churning off the U.S. Pacific Northwest coast will send an overlapping north-northeast (010-030 degree) swell across the islands early Friday, peaking Sunday into Monday and then fading Tuesday.

While none of these swells are expected to produce advisory level surf, the potential for high surf along north and east-facing shores will need to be monitored, especially as combining north-northeast swells peak Saturday through Monday.

 

 

 

World-wide Tropical Cyclone Activity

 

Atlantic Ocean:  There are no active tropical cyclones

Caribbean Sea:  There are no active tropical cyclones

Gulf of Mexico:  There are no active tropical cyclone

Northeastern Pacific:  There are no active tropical cyclon

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

North Central Pacific:  There are no active tropical cyclone

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:

Tropical Cyclone 02S (Bheki)…is located approximately 104 NM south-southeast of St. Denis

https://www.metoc.navy.mil/jtwc/products/sh0225.gif

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:  Will Agricultural Weeds Finally Claim the Upper Hand in a Changing Climate?

A few years back, a group of weed scientists showed that soil-applied herbicides are less effective against agricultural weeds in the context of our changing climate. Now, the same research group, led by the USDA Agricultural Research Service and the University of Illinois Urbana-Champaign, has shown the same is true of post-emergence (POST) herbicides.

Mining a 30-year database from 16 Extension weed science programs (including Illinois Extension) across the U.S. Corn Belt, the researchers found variable weather significantly reduces the effectiveness of three leading POST herbicides against major weeds affecting corn and soybean. And if farmers can’t adequately control weeds with PRE or POST herbicides, corn and soybean yields — and global food security — will suffer.

“Weather doesn’t just matter in the hours after POST application, as other studies have shown. Our analysis showed air temperature and precipitation were linked with herbicide effectiveness days before and after application for the products and weeds we studied,” said Chris Landau, postdoctoral researcher for USDA-ARS and first author on the paper. “With the sheer amount of data we analyzed — thousands and thousands of data points, including a broad range of weather conditions over 30 years — we were able to characterize the effects of weather on POST herbicide efficacy on a much broader range of environments than previous studies.”

Read more at: University of Illinois Urbana-Champaign