Welcome to the Cumulus Support forum.

Latest Cumulus MX release 3.6.5 (build 3081) - 28 May 2020 (please see important announcement regarding releases since 3.5.0)
Legacy Cumulus 1 release v1.9.4 (build 1099) - 28 November 2014 (a patch is available for 1.9.4 build 1099 that extends the date range of the NOAA report and Snow Index drop-down menus to 2030)

See the Wiki to download the software or click on the Downloads link in the Forum Banner.

Rainfall

Discussion specific to Davis weather stations
Post Reply
User avatar
PaulMy
Posts: 2130
Joined: Sun 28 Sep 2008 11:54 pm
Weather Station: Davis Vantage Pro 2+ w/Envoy USB
Operating System: Windows-8
Location: Komoka, ON Canada
Contact:

Rainfall

Post by PaulMy »

While doing my daily manual precipitation upload to the CoCoRaHS program and there was some rain in the manual CoCoRaHS gauge I noticed my Cumulus yearly and monthly rainfall totals were lower than they were yesterday. In checking the May17log.txt I found that at
01/05/17 21:40 the rainfall total was 305.2 and at
01/05/17 21:50 the rainfall total was 301.4

I then recalled that there was a momentary power glitch yesterday evening, and likely at that 21:xx time. All the lights, TV, etc. went off for a second but my weather station and computer equipment is on an APC Back-UPS XS1300 and that kept on running. All the other data is correct and all my weather related programs seem to have withstood the power glitch. We do get the occasional power glitch, especially during nearby lightning storm, and the UPS successfully protects my system and have not seen a similar rainfall change in the past.

I ran WL to check on the rainfall yesterday and from that was able to edit May17log.txt and also edited dayfile.txt to correct the rainfall.

While running WL it did the datalogger update from the last time I ran WL which was April 14th (I have my logger at 10 min interval and run WL every 15 days to keep the WL data current). However the size of the logger updating was smaller than what I expected and checking the WL log file the data from Apr 20 11:50a to Apr 27 2:00p is missing. No other data is missing from the logger but it leads me to worry about a problem with the datalogger (Davis USB 2008).

Could the error in the Cumulus rainfall coming from the datalogger and the missing WL April 20 to 27 data in the logger have any common fault?

Paul

User avatar
steve
Cumulus Author
Posts: 26704
Joined: Mon 02 Jun 2008 6:49 pm
Weather Station: None
Operating System: None
Location: Vienne, France
Contact:

Re: Rainfall

Post by steve »

It's possible. Someone else hads a similar problem very recently where the annual rainfall figure supplied by the console (that's the figure Cumulus uses for the rainfall counter) went down, and I think that was also after a power outage. But in your case the outage shouldn't have affected the console.
Steve

Post Reply