A counter-clockwise change in wind direction. For example, from southwest to southeast, through south. It is the opposite of veering wind.
Sea-ice terminology that describes ice without snow cover.
Batture Floes ...
Backing Winds - Winds which shift in a counterclockwise direction with time at a given location (e.g. from southerly to southeasterly), or change direction in a counterclockwise sense with height (e.g. westerly at the surface but becoming more southerly aloft). The opposite of veering winds.
BACKING WINDS: A counterclockwise change in wind direction. Backing winds with height are indicative of cold air advection (CAA).
BAR: An obstacle formed at the shallow entrance to the mouth of a river or bay.
BAROMETER: An instrument for measuring atmospheric pressure.
BACKING WIND- A wind direction that turns counterclockwise with height. An indication of cold air advection.
Backing Wind - A wind that changes its direction in a counter clockwise motion. An example would be a Northwest wind changing to a West wind.
~- Shifting of the wind in a counterclockwise direction, usually resulting from the approach of a low-pressure system.
Barograph- An instrument that provides a continuous record of atmospheric pressure.
Barometer- An instrument for measuring atmospheric pressure.
Veering and ~s In meteorology, "veering" and "~s" are terms used to describe the manner in which winds are shifting or changing.
Wind: It is the clockwise turning of the wind direction as we move up through the atmosphere. For example, a wind changing in height from south near the ground to southwest at 5,000 feet and finally to west at 10,000 feet. This is indicative of warm air advection. Compare with ~s.
In storm spotting, a ~ usually refers to the turning of a south or southwest surface wind with time to a more east or southeasterly direction. Backing of the surface wind can increase the potential for tornado development by increasing the directional shear at low levels.
Backing- relates to time trend and wind direction; ~s trend counter-clockwise and are indicative of cold air advection.
Veering/Backing of wind: When a wind direction changes such that it moves with the clock, e.g. from east to south through south-east, that is a veering wind; A wind therefore that changes against the normal clock motion is a ~.
...and for the visibility categories the following apply:
a given location (e.g., from southerly to westerly), or which change direction in a clockwise sense with height (e.g., southeasterly at the surface turning to southwesterly aloft). The latter example is a form of directional shear which is important for tornado formation. Compare with ~s.
These supercells typically don't last as long as their "right mover" cousins and they usually only produce large hail (¾" in diameter or greater) and severe wind gusts in the excess of 50 knots (58 mph). Left Movers are favored when you have ~s.
Compare with ~s.Velocity Azimuth DisplayA WSR 88-D product which shows the radar derived wind speeds at various heights. This radar product shows the wind speeds from 2,000 to 55,000 feet above the ground.
See also: What is the meaning of Storm, Surface, Backing, Weather, Precipitation?