uajqq/weewx-belchertown-new v1.8beta3-new-belchertown

v1.8 beta 3: wind barbs!

on GitHub

This release adds support for a new type of chart, wind barb. An arrow represents the direction of the wind, and barbs represent the speed in knots. Each half-notch represents 5 knots, like so (from the NWS):

My own station's maximum wind gust is only 46 kts, so someone else will have to test whether or not Highcharts renders the 50 kt pennants correctly.

The simplest configuration gives a chart that plots wind speed and corresponding barbs:

[[exampleChart]]
        title = Wind
        [[[windBarb]]]

Note that because of crowding, Highcharts can't always display every single flag, so it will edit some out to save space. This will sometimes result in the barbs not showing the maximum wind speed (this chart shows a maximum wind speed of 26 mph = 22.6 kts, but the maximum barb shown is 15 kts, because Highcharts had to eliminate some barbs to save space). You can fix that by adjusting the aggregate_interval and type:

[[exampleChart]]
        title = Wind
        aggregate_interval = 2000
        aggregate_type = max
        [[[windBarb]]]

Now the barbs correctly show the maximum speed as two full notches (20-24 kts).

You can also choose if the wind barbs are calculated from wind speed or wind gusts by setting wind_obs. The default is wind speed.

[[exampleChart]]
        title = Wind
        aggregate_interval = 2000
        aggregate_type = max
        [[[windBarb]]]
            wind_obs = windGust

You can combine wind speed and wind gusts into a single chart, like this:

[[exampleChart]]
        title = Wind
        aggregate_interval = 2000
        aggregate_type = max
        [[[windBarb]]]
            wind_obs = windGust
        [[[windSpeed]]]

All of this info will be in the wiki once the features are part of an official release.

Another minor change: gapsize is now set automatically for all charts if the result would be a blank chart.