Cumulus Support

I keep a written record of daily weather, referring to graphs in cumulus. Using the wind direction graph for 24 hrs I estimate the 'average' wind direction for the day. However, in periods of predominantly N winds [the situation this week] I'm unable to distinguish between a N wind and no wind! Is this a common problem?

If you set 'use bearing zero when calm', then you will (should!) get a bearing of zero when there's no wind, and 360 for North. It's a good idea to use this setting anyway, as it conforms to standard reporting practice (in the UK, at least).