Windy Customized Graphics - Version 3



  • I doubled the display sensitivity of the Rain Accumulation overlay and increased the display range by 20%, to 2,500 mm.

    Description:

    This has the same overlay colors as the prior version (up to 1,000 mm) except the increment used has been reduced from 2.5 mm increment steps, to 1.25 mm steps in rainfall. This means that a color which was prior used to depict 300 mm of rainfall, will now show 150 mm of rainfall instead. Thus I've also had to add a new shading above 1,000 mm up to 2,500 mm. The result shows much more detail and contrast compared to the last version. The lower rainfall events are displayed with double the contrast and detail, while the highest values and their associated structures, development and movement are depicted more clearly than before as well - more detail everywhere.

    Rain accumulation [rainAccu]

    The setting is here:
    https://community.windy.com/post/19252

    Example:
    g.png

    e.pngf.png

    Note that if the data gradient becomes very steep during intense events this produces a blocky display when zoomed-out but smooths-out once zoomed-in. In this case the forecast is for extremely intense rainfall (1,910 mm).

    c.pngd.png

    With the standard Windy overlay there's literally no visible detail being displayed. It's hard to believe these are showing the same area, time and event.

    a.pngb.png

    NOTE: I've mildly edited the upper-end shading since I posted these images and have updated the setting but not these example images (the colors are only slightly changed to improve visual smoothness).



  • Rain overlays have now been updated with expanded ranges for rainfall in extreme events with improved sensitivity to small changes as well.

    Rain, thunder [rainClouds]

    Setting is here:
    https://community.windy.com/post/19256

    Rain accumulation [rainAccu]

    Setting is here:
    https://community.windy.com/post/19252

    Rain, thunder [rain] (This one controls the rainfall seen within the “Clouds” overlay)

    Setting is here:
    https://community.windy.com/post/19251

    Examples:

    Rain, thunder [rainClouds]
    1.png
    2.png
    9.png

    Rain accumulation [rainAccu]
    6.png
    7.png

    Rain, thunder [rain]
    3.png
    4.png
    5.png



  • Revised temperature overlay between +15C and -10C.

    Temperature [temp]

    Setting is here:
    https://community.windy.com/post/19257

    Examples:
    1.png
    2.png
    3.png



  • Animation of the new Temperature overlay setting in between -10C and +15C.

    10 fps
    _center_shadow



  • Revised temperature overlay setting between -40C and -70C, to make it less dark in the -55C area.

    Temperature [temp]

    Setting is here:
    https://community.windy.com/post/19257

    Examples:
    1.png
    2.png



  • Revised temperature overlay shading color between 0C and -40C due to colors which were too similar at –10C and –30 C.

    Temperature [temp]

    Setting is here:
    https://community.windy.com/post/19257

    Examples:
    4.png
    5.png
    _center_shadow



  • I've doubled the visible detail of the cloud base overlay between ground level and 10,000 ft via adding the color pink to designate cloud bases at 5,000 ft, as per this legend.

    Cloud Base Legend.png

    I've also included the same colors as used in the Cloud Tops overlay for the Cloud bases occurring above 18,000 ft.

    Cloud base [cbase]

    This new setting is here:
    https://community.windy.com/post/19263

    Examples

    1.png2.png

    3.png4.png

    As you can see the setting presents a much more detailed and useful picture of cloud base altitude details and their locations to pilots - at all civil flyable altitude levels.

    I'll be altering the Cloud Tops overlay soon to properly match the new Cloud base shading colors, so there's almost no difference between them.



  • I've now altered the Cloud tops overlay's colors and shading to match the Cloud bases overlay except below 2,500 ft, where the tops gradually become shades of grey below 1,700 ft.

    Legend
    Cloud tops [levels] Legend.png

    Cloud tops [levels]

    The setting is available here:
    https://community.windy.com/post/19262

    Examples: the level of useful visual detail is through the roof compared to the standard overlay. The color shades are accurate to +/-100 ft of altitude increments. This is a fully linear overlay.

    1.png2.png

    3.png4.png

    5.png6.png

    7.png8.png



  • I've created a new ozone overlay based on the existing Windy overlay for the new Copernicus ozone forecasting.

    Firstly, the "Ozone Hole" phenomena is temporary and seasonal. It appears each southern winter over Antarctica, and it usually begins to form during June, then breaks up again (fills in completely) by about the end of October or early November/ The 'hole' (ozone depletion) peaks at around late August or early Septemper. This 'Hole' of ozone depletion is only now beginning to form (at time of this posting, on June 12th, 2019) over the Southern Ocean as is shown in the forecast images given below.

    However, there's a significant problem with the initial standard Windy overlay for this Copernicus data's display, which will become very apparent as the ozone depletion level falls below 218 DU, which it's currently close to doing, and will do so during the coming weeks. The problem is due to a flaw in the standard overlay setting:

    Standard Overlay Setting.png

    As the 218 DU depletion level is crossed there will be a sudden change in the shading which will become very apparent with the display of an 'edge' to this drop in ozone. It will be a sharp change that is unsightly, with almost no contrast or detail visible within the hole as it deepens and develops below 218 DU. In other words, the standard setting will create a heavily biased representation of the hole as it begins to develop minus almost any interior detail, as it will be almost a uniform color from below 218 DU.

    Now why would anyone want to do that? One might want to do it if for some reason you wanted to make the hole's depletion look larger, more discrete, and more dire or bloated than it really is - surely not!

    This new custom ozone overlay replacement removes those serious depiction problems altogether. It's a linear overlay while the standard overlay is not linear below 220 DU (and that's where linearity and detail as the most necessary but is absent) but it is at least linear above 220 DU.

    The new setting is here:
    https://community.windy.com/post/19271

    This is an abridged Legend for this new setting which blends these colors from the increments given:
    Ozone Legend.png

    Note that the lowest DU bright (red) level is set to 80. That's done because it's close to but still just below the lowest observed historical ozone depletion levels. In recent years the ozone level falls to only about 130 to 120 DU each year. As the depletion is becoming established a bit later this year the total depletion level achieved in 2019 may be fairly mild.

    These are the Ozone Hole colors that will appear as the hole deepens (down towards about 120 DU buy late August or early September):
    Ozone Hole Colors.png

    Examples of both the standard and new setting
    1.png2.png

    3.png4.png



  • And within the very next model run the standard Windy Ozone overlay problem that I pointed out above has actually appeared.

    This is my new custom Ozone overlay setting as referred to above:
    5.png

    And this is the way the standard Windy ozone overlay depicts the same forecast:
    6.png

    Sharp edged, block color, no visual details or structures visible within the area affected. The entire southern winter ozone depletion area will look like that as it begins to develop - very ugly - within what is otherwise one of Windy's better standard overlays.

    I'm going to report this as a display bug within the standard Windy Ozone overlay setting.

    This bug can be easily remedied via using a standard setting more like this one:
    Alternate setting suggestion.png

    This alternate 'standard' Windy setting removes the display bug entirely and this is what it looks like:

    7 Alternate setting.png8 Alternate setting.png

    This is the simplified setting being used for those 'debugged' images:
    Alternate setting.png



  • I've constructed two new Copernicus pollution forecasting replacement overlays:

    Air quality NO2 [no2] - The standard version of the air quality overlay has some typical problems (which seem to affect most standard windy pollution overlays) namely that it's strongly non-linear and the representation is highly distorted in that it dramatically over emphasizes the very low-levels of pollution, whilst limiting or cutting-off the visual detail with respect to the highest levels of pollution. It's a strange way to construct an overlay as it will implicitly strongly bias the forecast information, which will lead to incorrect perception of the forecast hazard level. To rectify this I've made completely linear the display below 10µg/m³. The rest of the replacement overlay is not equally linear to this, but this is done to cut down on the complexity of the resulting overlay setting (and due to some other implicit range limitations within this overlay). It now shows things in their correct proportions with a minimum of visual distortion. So although this new overlay appears to show less emphasis it is in fact showing the forecast pollution levels in the linearly correct relative proportions, both at the low-end level whilst also making clear where serious pollution problem-areas are actually located. The standard Windy overlay looks positively 'bloated' in comparison simply because it's showing the forecast information strongly out of the correct relative proportions and thus will distort a casual user's perception of where the real air-quality hazards exist.

    This new Air Quality setting is available here:
    https://community.windy.com/post/19358

    Example of Air Quality overlay:
    12.png13.png

    14.png15.png

    16.png
    The very unhealthy air-quality in the heart of China is simply disgusting.

    --

    The other new overlay is ...

    Aerosol [aod550] - This overlay was much more straight forward as the standard version had fewer problems with it. I've ensured a low visual distortion exists within a linear overlay depiction below 1AOD (it's still linear above 1AOD, but with a different linear increment to reduce the complexity of the shading). Plus I've changed the colors and increments to better display were the real problem areas are located and their relative proportions and detail.

    The new Aerosol setting is here:
    https://community.windy.com/post/19428

    Examples of Aerosol
    8.png9.png

    10.png11.png

    In summary, both of these new overlays are easier to read or assimilate at a glance to develop a correct sense of the pollution proportions and their relative hazard level.

    I'm still developing a PM2.5 replacement overlay which will be much more complicated due to the range scale of the information within it.


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