its not just terminal forecasts as well, the past few months i have noticed larger and larger discrepancies between whats forecast and whats actual in area forecast as well. last east, planned to Temora from YWOL, wind forecast was 260 at 10 kts max, actual headwind was 45 kts! the last 4 big navs i have done the plan has been throw out the window within 10 mins of take off. winds totally incorrect. and by big margins.