@Gkikas-LGPZ I see. Hmmm, it seems that their predictions are vastly different too. So I suppose you fellows made the best choice for default. OK.

• Go to https://www.windy.com/-Rain-thunder-rain?gfs,rain
• Keep your eyes on the little wind arrows
• Start the animation

Wouldn't it be better to keep the previous hour's arrows on the screen while drawing this hour's?

Currently the user sees the arrows totally disappear and reappear for each step. Well at least the background tiles don't do the same.

The right arrow keyboard key works to step through time on
https://www.windy.com/-Rain-thunder-rain but not on
https://www.windy.com/-Radar-lightning-radar
Yes, even though their time scales are vastly different.

OK it seems each zoom level has a differing level of appropriate jump gaps.
At zoom level 5 three hours is fine, and any finer grained jumps are a luxury.
But at zoom level 8 at least one-hour granularity seems to be best -- unless it is clear desert weather all day with no changes at all.

• Visit https://www.windy.com/-Rain-thunder-rain?rain,23.790,120.624,8
• Hit keyboard→→→→... to advance time three hours at a time.

You will observe that for major storm blobs one can follow the logic of how they travel.

But for anything less, it is: how did cloud A jump to point B? Etc.

Therefore we see that three hour jumps are just too wide.

One hour jumps are needed to keep the cloud movement logic recognizable. P.S., no I am not "overly zoomed in for my own good."

The site does a super job with the little wind arrows. Now time to fix up jerky weather blob (cloud) movement.

OK I went into chrome://settings/content/siteDetails?site=https://www.windy.com/ and cleared all data,
and now it is functioning properly, both logged in or logged out. But...geez! OK thanks everybody. Now on to the next issue...

I find if I "Open link in incognito window" it works correctly.
But I open it in a normal (logged in) window, it gets zoomed to the default (5) zoom.
https://community.windy.com/assets/uploads/profile/796886-profileavatar.png is my picture, so
796886 must be my UserID. So maybe one of the technical staff could see what the matter is. Thanks.
Seen in Version 75.0.3770.80 (Developer Build) built on Debian 10.0, running on Debian 10.0 (64-bit) of Chromium, but not in Firefox. Wait, happens logged out too in Chromium... But not in Incoginto window...

Just the other day I was looping https://www.windy.com/-Radar-lightning-radar and noticed the map doesn't update all at the same time.
It is just like if the famous painter first worked on the portrait's left foot and right cheek, took a break, and came back and then did the right foot and left cheek. Very disconcerting.
So first the clouds on the left move 10 km. and stop. Then the clouds on the right move 10 km. and stop.
Please instead have the clouds on the left and right move 5km, and then both move another 5km.
(In fact that would correctly keep the distance between them constant, which is more likely the reality Instead of this "God has an energy crisis and can only move one cloud at a time' animation.)
Thanks.

I was told Windy does not remember your favorite view, and to use a browser bookmark instead.

OK I used
https://www.windy.com/-Rain-thunder-rain?rain,24.182,120.866,8 but
https://www.windy.com/-Rain-thunder-rain?rain,24.182,120.866,5
is where it snaps to, so what's the point?

OK, that one sees thunder vs. lightning entries in the menu probably is done on purpose to separate two different data sets, but still seems odd.