'Weather' describes the short-term variations in atmospheric conditions - on time scales ranging from hourly, daily, or even seasonal.
(Weather; describes; the short-term variations in atmospheric conditions - on time scales) (atmospheric conditions - on time scales; ranging; from hourly, daily, or even seasonal)
Weather atmospheric conditions - on time scales
describes ranging
the short-term variations in atmospheric conditions - on time scales
from hourly, daily, or even seasonal