your cwop data looks much better now
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.
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
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
Thank you for your reply, Steve. I will give it a try.
Bill