Inaccuracy, however, usually results from the complexity and variability of the factors involved, and not from undertrained or negligent forecasters.
將衛星拍攝的圖片輸入電腦，使之數值化，就可以計算出大氣中每一部分的成分、狀況，做為預測的根據，這種氣象預報稱為「數值預報」，已經逐漸客觀化。