Category:Weather

This is the category page for weather. Any aviation topics related to weather can be found here.

Trough

A trough is an elongated U-shaped area of low pressure with high pressure on either side which may bring about a gradual wind shift. It is also the V-shape formed by the sharp bending of the isobars along a frontal surface.

Trowal

Trough of Warm Air Aloft. Typically used during winter weather, it is a "tongue" of relatively warm/moist air aloft that wraps around to the north and west of a mature cyclone. It is best analyzed between 750-550 millibars using equivalent potential temperature (theta-e). Areas of intense lift and frontogenesis are commonly associated with trowals, hence they are favoured regions for heavy and/or prolonged precipitation. During a winter storm, the heaviest snowfall amounts frequently occur along and north of the trowal axis. Ref: Trowal Definition

Inversion

An indication of the presence of wind shear