CWOP Data variations?

[Fox_Of_The_Wind]

well I changed the setting in  WeatherLink will that change the settings in WD? or am I totaly missing it?

[SoftWx]

If you're talking about the elevation setting in WD's units and other settings dialog, no, I don't think that changes the console's elevation setting. When you change the console's elevation setting you will know it. Your barometer displayed on the console will jump up to about where the CWOP QC says it ought to be.

You can also change the elevation by going through the console setup sequence, but you should refer to the VP manual for the steps in that.

If someone knows how to set the console elevation/barometer from WD, maybe they can chime in here.

[Fox_Of_The_Wind]

Oh I am useing a data loger if that changes anything???

[SoftWx]

I misread you post two posts ago. If you changed the elevation using WeatherLink then your VP's elevation should be ok now. That won't change the elevation in WD. To do that, click on WD's Control Panel, and then click on Units & Other Settings in the control panel. This will bring up a dialog. Look near the lower right hand corner and you'll see a place to enter "Height above sea level". Do NOT check the QFE check box. You don't need that.

I looked at your current CWOP data and it's still low. I would run WeatherLink again and do the "Set Barometer.." setting, and (as of this morning based on the two closest airport readings) enter the following:
elevation 720
barometer 29.68

[Fox_Of_The_Wind]

ok I just changes the settings again. I had QFE checked so I unchecked that. and I restarted WD again after I changes the settings in weather links set barometer settings window.

The elevation in WD in Height above sea level is 720.

Well my barometer changed now. I don't know if it is for the better because as of right now it has not moves from were it changes to. But I will keep watching it.

[SoftWx]

your cwop data looks much better now

[Fox_Of_The_Wind]

Yup looks like I am ok here also. http://raws.wrh.noaa.gov/cgi-bin/roman/meso_base.cgi?stn=C4731  I am getting green OK now.

Thanks for the help.

[comweb]

I was glad to find this thread because it discusses the barometer settings for a vp2 (firmware 4/06).  However, I'm missing something.  I had set the vp2 console barometer (via weatherlink) with 0 elevation (I am at 6978 ft) and then set the sea level barometer to my only nearby reference: Durango-La Plata Airport which is about 15-20 mi away and 300 ft lower in elevation.

My Barometer tracked the airport pretty well until the reading got above about 30.30 in.  And I am getting green with CWOP (CW6135).  But I thought I would follow these instructions and get the elevation in there. 

In Weatherlink I set elevation-6978 ft, and current barometer reading at the airport-30.08 in. Then the altimeter pressure (and WD if "use this pressure...." is checked) read 30.507 in (see below).  That doesn't make sense to me.  What am I missing? This does confuse me.  Any help would be appreciated.

edit: the barometer pressure reading for the airport says (altimeter) if that matters. http://weather.noaa.gov/weather/current/KDRO.html

Bill

[SoftWx]

I think you should set your VP console elevation to your true elevation, and calibrate your console to match the nearby NWS/FAA station. It doesn't matter if the airport elevation is different. WeatherDisplay should be set to your true elevation also, and should be configured to send altimeter to CWOP.

In my first sentence, I said to calibrate the console to the airport. This will only get you close to being calibrated, but one more step is needed because your console displays sea level pressure and the airport shows altimeter. Sometime when the pressure is relatively stable, write down the airport's altimeter value along with the time the observation was made. Then, look at your CWOP data and see what altimeter value WD sent for you. Note the difference and adjust your console by that amount (you can do this easiest by just using the SET feature on the console itself). For example, if the airport reported 30.12 inHg at 3:00pm, and the altimeter value you sent to CWOP at 3:00pm was 30.07 inHg, then you would bump up the pressure on your console by .05 inHg.

I have found this the best method for calibrating my station so that it send very good altimeter values to CWOP.

Steve

[comweb]

Thank you for your reply, Steve.  I will give it a try.

Bill