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11
Davis Instruments Weather Stations / Re: Tipping spoon (new type) - adjusting
« Last post by GazSlab on Yesterday at 08:40:17 PM »
Hi Phil,

I have a Davis VP2 located in Indonesia but purchased in Australia from the Davis Australian agent. I recently fitted the tipping spoon upgrade, the old one was the double tipping bucket. The tipping spoon was also purchased from the Davis Australia agent. I've compared measurements between the VP2 and a 4" opening diam Nylex manual gauge. The Nylex gauge is identical in design to the American CocoRAHS gauge, but it does not come with any calibration certification.

I compared readings from 29th Jan to 9th Feb; Davis 195.8mm, Nylex manual 186.7mm.
So in aggregate the Davis gauge reads 4.9% over.
The manual gauge is about 15 meters away from the Davis gauge and also the manual gauge is 4ft off the ground whereas the Davis is on the shed roof about 12ft off the ground.

With the new tipping spoon I've found the Davis reads over during heavy showers and reads slightly under during lighter rain. During the trial period we had one day of heavy rain and the Davis recorded 98.8mm whereas the manual gauge recorded 90.6mm. My aero cone inner surface is quite rough so water is likely getting caught up in the cone then flashing off during the light events. I think this has no effect during heavy events. I need to purchase a new cone (expensive in Indonesia due to import duties, will buy in Aust. another time). If the majority of the rain is light in your location then this may contribute to your under reading?

My next move is to mount the manual gauge next to the Davis gauge on top of the shed to do a better comparison. However in summary I feel the Davis gauge with the tipping spoon reads slightly over but I'm reluctant to touch the factory cal until absolutely certain. I'm happy with it.

As for your Ecowitt gauge... I own an Ecowitt gauge and it is fitted at my house in Perth, purchased from Amazon. I also compared it to a 4" Nylex gauge and found it reads way over. I applied a 0.65 multiplier at the Ecowitt console which produces a figure fairly close to the manual gauge. I'm not sure there is any mechanical calibration available on the Ecowitt device. Note most the rain in Perth is from cold fronts and pretty heavy when it comes (not often enough these days!).
12
Question about multiple forwards and the config file.

In the foshkplugin directory there is foshkplugin.conf and foshkplugin.conf.orig.
If I edit and save the .conf file, the changes do not stick.  Am I supposed to edit the .orig file?

Also, what settings do I add to forward to openweathermap.org?

Thanks in advance
13
I might ask what is the real day to day need to know the direction of wind?  Sure the speed of it, but why the direction?

In New Zealand Kite fishermen need to know the wind direction ( offshore wind direction ) so they can launch their fishing kites and catch huge snapper and plenty of salt water species .
We sell a good number of GEL batteries for fishing Torpedos for that purpose when the wind isn't playing ball .
I personally have caught 3 huge Snapper ( 23, 24 & 26 lbs ) on the last three hooks of my Kite longline
14
OK.
I just googled "Why should I calibrate my barometer"
Not surprisingly close to the top of the results was a link to this very page.

However I also found this snippet of inspiration:
"Knowing the barometric pressure can actually influence how long you should bake something in different areas of the country. It’s what forms those suggested times and the “high altitude” instructions on the back of the box."

I never would have known if I hadn't read this thread.
Thank you gzlag  :grin:

There you go, a practical, non-weather use for a barometer. I just knew there must be a reason why I bought a weather station! :)
15
NOAA National Weather Service / NOAA Coverage & Reliability
« Last post by MaverickNH on Yesterday at 07:51:28 PM »
I’m in SoNH, in GYX territory, just at the limits of their radars in Manchester, NH. So, they need WeatherSpotters to help them figure what’s actually happening here. I travel frequently to Utica, NY, which seems at the fringe of the Binghamton, NY NOAA coverage, but I can’t tell for sure.

How can I tell, when traveling, where NOAA forecasting is iffy? Smartphone apps don’t really seem to incorporate that uncertainty that goes with fringe radar coverage.
16
WeatherUnderground / Weather Underground table and graph not lining up?
« Last post by KDFamily on Yesterday at 07:06:39 PM »
Hello, I'm new here and new to Weather Underground. I have my personal weather station on Weather Underground.  When I look at the Graph results it doesn't line up with the Table results.  When I look at the table for time and wind speed, when I scroll down to the time in question, there are additional wind etc results without a time? It's like 20 rows so time isn't lining up with the wind, temperature etc. Is there a reason for this? Is it normal or do I have to change some kind of setting to have everything line up? Thank you for your help!
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I might ask what is the real day to day need to know the direction of wind?  Sure the speed of it, but why the direction? 
18
The standard funnel was shiney and new too.

The 2 other weather stations in my village use the piezo type sensors and they vary wildly with each other. Who knows which one is accurate  ](*,)
19
OK.
I just googled "Why should I calibrate my barometer"
Not surprisingly close to the top of the results was a link to this very page.

However I also found this snippet of inspiration:
"Knowing the barometric pressure can actually influence how long you should bake something in different areas of the country. It’s what forms those suggested times and the “high altitude” instructions on the back of the box."

I never would have known if I hadn't read this thread.
Thank you gzlag  :grin:
20
The changeover to the heightened rain funnel has improved my light rainfall readings.

I agree. Maybe because it's shiny and new?

For old funnels see, e.g., https://www.wxforum.net/index.php?topic=47889.msg482957#msg482957
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