Good Davis WX resource

Been doing some research lately and found this good resource for the Davis weather stations. So just saving the link here for future self.
Manual: https://www.manula.com/manuals/pws/davis-kb/1/en/topic/general-please-read

Some Notes
Interesting info on Barometer Pressure.
https://www.manula.com/manuals/pws/davis-kb/1/en/topic/pressure-reading-problems

The intrinsic accuracy of the barometric pressure readings for both Vue and VP2 stations is quoted as ±1mb or ±0.03“Hg and, once calibrated, most units will track other high-quality pressure readings in the locality pretty well and to within this nominal accuracy. There may be some long-term drift, in which case an occasional recalibration against a reference reading should fix any slight problem.

However, stations that are located at significant altitude (eg 1000-2000ft and above) may experience more frequent discrepancies against reference readings. This is not necessarily caused by any fault with the console but can arise because of the way that corrections are made from the measured local pressure back down to sea level. (The more elevated the location, the greater any sea-level correction will be, which is why this issue is usually only noticeable at stations located at significant altitude.)

When I compare my barometer readings to what Windy.com is showing for this area, my station is within 1mb. I do puzzle why so many other personal weather stations in the area are so different. Maybe they have drifted or not been calibrated correctly or is mine off. Since I cannot compare to an official calibrated one, I tried to calibrate mine to the airports in the area on a stable air pressure day.


Another topic of exploration was if I could move my UV and solar sensors to the anemometer mount point so they would never be in the shade. The sensor transmitter has plugs for UV and Solar, but found this text stating that it would not work.

https://www.manula.com/manuals/pws/davis-kb/1/en/topic/uv-sensor

Other transmitters: Users often notice that supplementary transmitters such as the 6332 Anemometer Transmitter or the 6372 or 6382 Temperature Stations use exactly the same transmitter board as the ISS, which therefore has sockets to connect solar or UV sensors. Regrettably you cannot use these supplementary solar/UV inputs. The reason is that solar/UV data must be received by the standard VP2 console as ISS data and the VP2 system allows only one ISS per station. (The supplementary stations will in fact transmit the solar/UV data, but this can only be received by eg an Envoy8X or Meteobridge Pro Red unit.)

Creative view of wind patterns flow in USA

View large amount of data quickly and meaningful can be difficult to do.  Some bright minds have come up with an interesting way in showingcurrent wind flow over  the United States.  Just need a Canada version now.

 

Check it out here: http://hint.fm/wind/

Sample Image (Website link has animated version):

Groundhog Day

Groundhog Day weather predictions have been going on for centuries.  The following information is from the book “Weather Wisdom” by Albert Lee (ISBN 0-385-01770-7). The date February 2 originally was known as Candlemas Day which began in the early days of Catholicism as the feast of the purification of Mary.  This date for  was believed to be a “weather breeder”, a period of change in which future weather patterns are set.

February 2 in our neck of the woods was a clear sunny day.  So according to weather folklore,

“If Candlemas Day be fine and clear,
We shall have winter half the year.” 

With our winter so far being very warm and pleasant for the most part, guess we are due for winter weather.  So this probably means spring will be colder than normal.

 

Spotlight Project:A History of the Sky for One Year

A very intriguing project done in San Francisco with time lapse photography and weather patterns. Each square displays the day’s sky video in sequence with all the other days that year.  The mosaic becomes a beautiful moving display of art created by nature.

Update 2026: Sadly, the website murphlab.com is gone. The YouTube Video is still available.

Website: http://www.murphlab.com/2011/11/15/a-history-of-the-sky-for-one-year/

Technical information: http://murphlab.com/hsky/

 

View HD version, click here and then select full screen:
http://www.youtube.com/watch?v=PNln_me-XjI&feature=youtu.be&hd=1