Probably a silly question - does WeatherCat use HighCharts?

HighCharts have decided everyone using it needs a licence.

March was...
   Warmer than average (56.73°F versus an average of 54.65)
   Drier than average (4.81 in versus an average total of 7.34)
   Calmer than average (a wind run of 272 miles versus an average of 1,110)

Finally, does Weather-Cat upload from the cache or does it upload from the Weather-Cat database ?  Looking at my local Weather-Cat database the entire Cached record from when I was away is there.  If it uploads from the database can I assume that I don't need a internet connection while I'm away ?

Ray, there are no dumb questions. Each one of us has to figure out this stuff at some point and many of us are in still in the process.

Whilst figuring out your uploading to WU, you also need to look at how your data logger is configured. The data logger stores weather info in its cache for those times your Davis Console may not have a current connection to your Mac.

You set the data logger sampling interval in WeatherCat Tools | Station Hardware Options

Check out this article in the WeatherCat Wiki for more information: https://wiki.trixology.com/index.php?title=Capacity_of_the_Davis_data-logger_to_store_weather_data_depending_on_the_chosen_sampling_interval

Hello Blick,
Davis Data Logger every 1 minutes. WeatherCat itself (Sampling Rate, preferences - div.2) is set to 2 minutes with adaptive on.

Dear Ray and WeatherCat troubleshooters,

How can I tell if WU accepted the historical uploaded ?  I does not show on my WU dashboard. 

If it doesn't show up on the dashboard, the data wasn't uploaded successfully.

Also I assume this 'trick' involves stopping Weather-Cat uploads,  and then restarting the upload process again.  Is this correct ?  As I said I'm a novice so plain instructions are appreciated.  Please assume I know very little of the process.

Take a look at the WeatherCat manual (which you can access from the WeatherCat Help menu).  On page 139 of the current manual is a screenshot of the preferences for Weather Underground.  Start by turning off the Historical Uploads and making sure that your computer is connecting successfully to Weather Underground.  Then, turn Historical Uploads back on.  Also, check the Log Historical Uploads option in that same preference.  You can then see if WeatherCat is successful making a Historical Upload by looking at the Log (which can be accessed from the Tools menu.)

I understand occasional powering up the computer once a week won't help with CWOP but presumably it will with WU. I'm away all winter so really don't want to leave the computer running even with just one app. If I get a power-cut I can use the 'pmset' commands to reboot the system when power returns, so a UPS is not necessary for a once per week type operation. 

I don't know much about the 'pmset' command.  I don't know if your computer is completely cut off from power, if it can restart anyway.  At the very least you would need to have WeatherCat automatically launched on startup and you would need to not use the quit check option (see page 178 of the user manual.)

Finally, does Weather-Cat upload from the cache or does it upload from the Weather-Cat database ?  Looking at my local Weather-Cat database the entire Cached record from when I was away is there.  If it uploads from the database can I assume that I don't need a internet connection while I'm away ?

You couldn't upload to Weather Underground without an Internet connection.  Isn't the plan to upload to Weather Underground once a week?  Sorry, I don't understand this particular question.

Let us know.

Edouard