Fleet Week 2021 Air Show (Photos and Timelapse)

Fleet Week 2021 Air Show (Photos and Timelapse)

Fleet Week 2021 Air Show (Photos and Timelapse)

Fleet Week 2021 Air Show (Photos and Timelapse)

Fleet Week 2021 Air Show (Photos and Timelapse)

Blue Angels at the San Francisco 2021 Fleet Week Air Show.

Here's a timelapse video of the United 777, Fat Albert and the full Blue Angels performance, shot from Slacker Hill in the Marin Headlands:

(Previously: Fleet Week 2019 Air Show)

(More Timelapses)

Fog Heart

Fog Heart

Sometimes even Karla The Fog leaves her heart in (or near) San Francisco. Seen on the excellent fog.today.

(All Etc Posts)

Twin Peaks Loop

Twin Peaks Loop

Twin Peaks Loop

Twin Peaks Loop

I have previously described Twin Peaks as not much of a hike, which is absolutely true if you drive there. When I first moved to San Francisco I lived in Noe Valley and used to cycle up to Twin Peaks and then try to get home without pedalling. For many years after that I'd take visitors up to the top and developed a somewhat weird tradition of taking each new child there soon after they were released from the hospital.

Post lockdown I'm up there most weeks. This is my five mile loop which starts heading up Ulloa from West Portal to Portola. Portola breaks the climb briefly as you pass the striking herchurch and controversial Twin Peaks gas station before heading up Twin Peaks Boulevard to the 922 foot summits. For a while Twin Peaks Boulevard was entirely closed to traffic (although you really had to keep an eye out for high speed skateboarders). Unfortunately it's now open all the way to Christmas Tree Point. Head down the north side to Clarendon and follow this all the way down to Forest Hill and then back to West Portal.

(Previously: Twin Peaks 360 4KTwin PeaksSan Francisco from Twin Peaks)

Hike starts at: 37.741879, -122.471354. View in Google Earth.

(Hike Map)

Remnants in the Sunset

Remnants in the Sunset

Remnants in the Sunset

Remnants in the Sunset

During the pandemic induced lockdowns last year we started hiking locally using random trails generated by Routeshuffle. Sometimes these were repetitive death marches along indistinguishable avenues (my kids would say 100% of the time). A few have emerged as favorites that I walk regularly and I'm going to add these to the ITHCWY hike collection.

Remnants in the Sunset is a three mile loop named for the islands of rock and dunes visited along the way. The west of San Francisco used to be all dunes and these parks are now all that remains of that original ecosystem.

Walk up 15th Avenue from Taraval to Grandview Park. Go up the steps, admire the view and then down the other side and follow 14th Avenue to Rocky Outcrop Park. This is a wind tunnel with houses on one side and cliffs on the other. Then head up to Golden Gate Heights Park and Larsen Peak at 755 feet. The return leg down Pacheco and Magellan provides views of Hawk Hill which has some unofficial trails but is closed to the public.

(Previously: Grand View of Fog, Post Storm Sunset)

Hike starts at: 37.741905, -122.471336. View in Google Earth.

(Hike Map)

Links for September 2021

Updated on Tuesday, September 14, 2021
Snap Out of It, America: Give Kids the Right to Vote

So I disagree with this but it's interesting and well argued. A better idea is my life expectancy weighted voting plan.

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The ease of mail-in voting may increase turnout in California’s recall election.

NYT finally twigs.

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A woman is suing S.F. for $50 million over a parking ticket, saying tire chalk is unconstitutional

In one of the cases, filed Sept. 4, plaintiff Maria Infante seeks $50 million and class-action status after a San Francisco parking enforcement officer wielding chalk on a residential street gave her a $95 ticket.
The second case, filed the same day against San Leandro, demands $5 million for class members whose tires were chalked to financially benefit the city.

Civilization continues to collapse. I had my tongue in my cheek for this proposed constitutional amendment but I'm not so sure any more...

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How to Call Customer Service and Actually Get What You Want

Wired has this generic article on getting support with some insights that might have been cutting age a decade ago. I'm still waiting for CAPTGUAs.

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Sand on Great Highway

Sand covering the great highway in San Francisco

Google Pixel 4 XL 4mm f1.7 1/3,900s ISO55

There is some controversy at the moment over the great highway in San Francisco. Should it stay closed to traffic as the pandemic eases? I enjoy walking and cycling here without cars, but it must be a pain to live nearby with all that traffic shifted to residential streets. It might be moot if the sand keeps flowing inland...

(Recent Photos)

San Francisco from Twin Peaks

Downtown San Francisco from Twin Peaks

Google Pixel 4 XL 6mm f2.4 1/1,400s ISO40

Photo of downtown San Francisco including a view down Market Street to the ferry building shot from Twin Peaks.

(Recent Photos)

Grand View of Fog

Grand View of Fog

Fog streaming in from the pacific as seen from Grand View Park in San Francisco.

(Previously: Post Storm Sunset)

(Recent Photos)

One Year of Tides Animated (with Sun and Moon)

One Year of Tides Animated (with Sun and Moon)

This animation shows a year of tides in San Francisco with the sun and moon:

I was inspired to create this after adding a tide forecast to a personal weather dashboard I have running on an old Surface Pro. I realized I didn't understand tides that much. I still don't, but I know more than I did before.

The animation illustrates four components of the tide. The obvious ones are the position of the sun and moon. When the moon is new or full the Earth, sun and moon are all lined up leading to larger 'spring' tides, which happen twice a month just like spring doesn't. As the moon waxes or wanes and becomes half full the moon and sun are at right angles and partially cancel each other out resulting in lower highs and higher lows. This is the neap tide, almost as unhelpful as 'spring'.

As orbits are not circles the Earth is closer or further away from the sun over the course of a year and the moon behaves the same way. When it's close than usual we get super moons and king tides (finally a type of tide that does what it sounds like). In the animation the sun and moon actually grow and shrink in proportion to their distance from Earth.

Here's how to read the animation. The date and time at the bottom of the screen refers to the tide right in the middle. The full screen shows the forecast running from 12 hours before the current time to 12 hours later. The vertical range is from -4 feet to 10 feet, relative to mean lower low water (MLLW), the average lowest tide over 19 years. The sun and moon are on a different scale - 360 degrees horizontally and 90 degrees vertically.

The tide forecast is pulled from the NOAA Tides and Currents API. I used SunCalc-Net for the position of the sun and moon, and the phase of and distance to the moon. For the distance to the sun I used a formula I found on StackExchange.

I wanted to both fit in a full year and run slowly enough to see what's going on each month so the video is around 20 minutes long. I won't be offended if you don't finish it.

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Post Storm Sunset

Updated on Monday, May 10, 2021

Post Storm Sunset

Sunset over the Pacific following a winter storm. Shot from Grand View park in San Francisco.

(Recent Photos)