Hi Jim & Damian,Congrats on the new arrival Damian! I was curious to know more about the wx station blending. It's been suggested to be one of the possible causes for some of the lower cloud layers not showing up correctly (at least they don't on my system). I'm a little confused as to why 2 miles is the limit chosen for using 100% reporting from the local station, and given that low overcast is usually consistent for a few miles, how would this even be a factor anyway in that scenario? Ex: KFIT 302206Z AUTO 15003KT 2SM BKN008 BKN033 OVC041 22/21 A2990 RMK AO2As you know, in reality in the above example, the weather in the general vicinity of KFIT for a few miles will be consistent, especially with the passage of a warm front as in the example. Even with higher visibilty, usually the overcast isn't a localized thing that disappears in 0.1 or even in a couple of miles. How would the station blending make such as drastic difference in ASV when you are only 0.1 miles more than the 2 mile radius from reporting station (to use your example given previously of being 2.1 miles away from the station)? Isn't there weight given to being only 0.1 miles away as opposed to 10 miles away or is 0.1 treated the same as 10.0? Just trying to understand more about the algorithm. Thanks. Neil

Hi Neil,I used that as an example and it probably wasn't a very good one! The blending effect is more pronounced in areas with fewer stations. You are correct with OVC in that it tends to be wide spread. With blending the closer your location is to a station the more influence that station has. My point in that other thread was that a station report is exactly good for those 2 miles. So many times users want that METAR to exactly match their conditions in FS04 and we know that even in real life this is not always the case.Hope this helps,JimActiveSky Sales and Supporthttp://www.hifisim.com/images/asv_dev_team.jpg http://www.hifisim.com/images/asv_proud_supporter.jpg