I joined the CWOP list and had also gone back and checked my data analysis page. It appears that my reading are now within their expected readings after replacing the sensor.
I plan to upgrade to a 24hr fars in the near future. This will likely help also as we generally have very little breeze or wind here.
CWOP also shows my anemometer sheltered from the wind. It was at 27' but had problems with the pole and had to drop it. I have not had the time to appropriately fix it and put it at 32'. This is going to require guy wires which i was hoping to avoid.
Another consideration of accuracy is not only my ponds proximity but also my sprinkler system. I have the ISS sited so that the sprinklers wont throw water on/in it, but that doesn't mean the sprinklers couldn't throw off my humidity readings. There is no place i can really site it far enough away from the trees, that is not covered by the sprinklers.
Thanks for the link to the NOAA page, iv'e seen it before but hadn't looked at it in a while.