Originally Posted by
Mross31
I've seen some DA be 407 feet, for example. Would I still round up to 500 feet?
Technically you just add the penalty to 407', say 200' for two approaches so your minimum forecast ceiling for filing would be 607'.
As 2Stg pointed out, WX reports and forecasts are in 100 foot increments, so a 600' forecast would be 7' too low to legally file. So you'd really need a 700' forecast.