Zonal flow is a meteorological term meaning that the general flow pattern is west to east, or east to west, along the Earth's latitude lines (as opposed to meridional flow). Extratropical cyclones in this environment tend to be weaker, moving faster and producing relatively little impact on local weather.
Famous quotes containing the word flow:
“Water doesn’t flow if it’s level, and people won’t complain if you treat them on the level.”
—Chinese proverb.